# Compute Engine API . regionBackendServices

## Instance Methods

Close httplib2 connections.

Deletes the specified regional BackendService resource.

Returns the specified regional BackendService resource.

Gets the most recent health check results for this

Gets the access control policy for a resource. May be empty if no such

Creates a regional BackendService resource in the specified project using

Retrieves the list of regional BackendService resources available to the

Retrieves a list of all usable backend services in the specified project in

Retrieves the next page of results.

Retrieves the next page of results.

Updates the specified regional BackendService resource with the data

Sets the access control policy on the specified resource.

Sets the Google Cloud Armor security policy for the specified backend

Returns permissions that a caller has on the specified resource.

Updates the specified regional BackendService resource with the data

### Method Details

`close()`

    Close httplib2 connections.

`delete(project, region, backendService, requestId=None, x__xgafv=None)`

    Deletes the specified regional BackendService resource.

    Args:
      project: string, Project ID for this request. (required)
      region: string, Name of the region scoping this request. (required)
      backendService: string, Name of the BackendService resource to delete. (required)
      requestId: string, An optional request ID to identify requests. Specify a unique request ID so
    that if you must retry your request, the server will know to ignore the
    request if it has already been completed.

    For example, consider a situation where you make an initial request and
    the request times out. If you make the request again with the same
    request ID, the server can check if original operation with the same
    request ID was received, and if so, will ignore the second request. This
    prevents clients from accidentally creating duplicate commitments.

    The request ID must be
    a valid UUID with the exception that zero UUID is not supported
    (00000000-0000-0000-0000-000000000000).
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Represents an Operation resource.
        #
        # Google Compute Engine has three Operation resources:
        #
        # * [Global](/compute/docs/reference/rest/beta/globalOperations)
        # * [Regional](/compute/docs/reference/rest/beta/regionOperations)
        # * [Zonal](/compute/docs/reference/rest/beta/zoneOperations)
        #
        # You can use an operation resource to manage asynchronous API requests.
        # For more information, readHandling
        # API responses.
        #
        # Operations can be global, regional or zonal.
        #
        #    - For global operations, use the `globalOperations`
        #    resource.
        #    - For regional operations, use the
        #    `regionOperations` resource.
        #    - For zonal operations, use
        #    the `zoneOperations` resource.
        #
        #
        #
        # For more information, read
        # Global, Regional, and Zonal Resources.
        #
        # Note that completed Operation resources have a limited
        # retention period.
      "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request.
          # Not present otherwise.
      "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
      "description": "A String", # [Output Only] A textual description of the operation, which is
          # set when the operation is created.
      "endTime": "A String", # [Output Only] The time that this operation was completed. This value is inRFC3339
          # text format.
      "error": { # [Output Only] If errors are generated during processing of the operation,
          # this field will be populated.
        "errors": [ # [Output Only] The array of errors encountered while processing this
            # operation.
          {
            "code": "A String", # [Output Only] The error type identifier for this error.
            "errorDetails": [ # [Output Only] An optional list of messages that contain the error
                # details. There is a set of defined message types to use for providing
                # details.The syntax depends on the error code. For example,
                # QuotaExceededInfo will have details when the error code is
                # QUOTA_EXCEEDED.
              {
                "errorInfo": { # Describes the cause of the error with structured details.
                    #
                    # Example of an error when contacting the "pubsub.googleapis.com" API when it
                    # is not enabled:
                    #
                    #     { "reason": "API_DISABLED"
                    #       "domain": "googleapis.com"
                    #       "metadata": {
                    #         "resource": "projects/123",
                    #         "service": "pubsub.googleapis.com"
                    #       }
                    #     }
                    #
                    # This response indicates that the pubsub.googleapis.com API is not enabled.
                    #
                    # Example of an error that is returned when attempting to create a Spanner
                    # instance in a region that is out of stock:
                    #
                    #     { "reason": "STOCKOUT"
                    #       "domain": "spanner.googleapis.com",
                    #       "metadata": {
                    #         "availableRegions": "us-central1,us-east2"
                    #       }
                    #     }
                  "domain": "A String", # The logical grouping to which the "reason" belongs. The error domain
                      # is typically the registered service name of the tool or product that
                      # generates the error. Example: "pubsub.googleapis.com". If the error is
                      # generated by some common infrastructure, the error domain must be a
                      # globally unique value that identifies the infrastructure. For Google API
                      # infrastructure, the error domain is "googleapis.com".
                  "metadatas": { # Additional structured details about this error.
                      #
                      # Keys must match a regular expression of `a-z+` but should
                      # ideally be lowerCamelCase. Also, they must be limited to 64 characters in
                      # length. When identifying the current value of an exceeded limit, the units
                      # should be contained in the key, not the value.  For example, rather than
                      # `{"instanceLimit": "100/request"}`, should be returned as,
                      # `{"instanceLimitPerRequest": "100"}`, if the client exceeds the number of
                      # instances that can be created in a single (batch) request.
                    "a_key": "A String",
                  },
                  "reason": "A String", # The reason of the error. This is a constant value that identifies the
                      # proximate cause of the error. Error reasons are unique within a particular
                      # domain of errors. This should be at most 63 characters and match a
                      # regular expression of `A-Z+[A-Z0-9]`, which represents
                      # UPPER_SNAKE_CASE.
                },
                "help": { # Provides links to documentation or for performing an out of band action.
                    #
                    # For example, if a quota check failed with an error indicating the calling
                    # project hasn't enabled the accessed service, this can contain a URL pointing
                    # directly to the right place in the developer console to flip the bit.
                  "links": [ # URL(s) pointing to additional information on handling the current error.
                    { # Describes a URL link.
                      "description": "A String", # Describes what the link offers.
                      "url": "A String", # The URL of the link.
                    },
                  ],
                },
                "localizedMessage": { # Provides a localized error message that is safe to return to the user
                    # which can be attached to an RPC error.
                  "locale": "A String", # The locale used following the specification defined at
                      # https://www.rfc-editor.org/rfc/bcp/bcp47.txt.
                      # Examples are: "en-US", "fr-CH", "es-MX"
                  "message": "A String", # The localized error message in the above locale.
                },
                "quotaInfo": { # Additional details for quota exceeded error for resource quota.
                  "dimensions": { # The map holding related quota dimensions.
                    "a_key": "A String",
                  },
                  "futureLimit": 3.14, # Future quota limit being rolled out. The limit's unit depends on the quota
                      #  type or metric.
                  "limit": 3.14, # Current effective quota limit. The limit's unit depends on the quota type
                      # or metric.
                  "limitName": "A String", # The name of the quota limit.
                  "metricName": "A String", # The Compute Engine quota metric name.
                  "rolloutStatus": "A String", # Rollout status of the future quota limit.
                },
              },
            ],
            "location": "A String", # [Output Only] Indicates the field in the request that caused the error.
                # This property is optional.
            "message": "A String", # [Output Only] An optional, human-readable error message.
          },
        ],
      },
      "getVersionOperationMetadata": {
        "inlineSbomInfo": {
          "currentComponentVersions": { # SBOM versions currently applied to the resource. The key is the component
              # name and the value is the version.
            "a_key": "A String",
          },
          "targetComponentVersions": { # SBOM versions scheduled for the next maintenance. The key is the
              # component name and the value is the version.
            "a_key": "A String",
          },
        },
      },
      "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error
          # message that was returned, such as `NOT FOUND`.
      "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error
          # status code that was returned. For example, a `404` means the
          # resource was not found.
      "id": "A String", # [Output Only] The unique identifier for the operation. This identifier is
          # defined by the server.
      "insertTime": "A String", # [Output Only] The time that this operation was requested.
          # This value is inRFC3339
          # text format.
      "instancesBulkInsertOperationMetadata": {
        "perLocationStatus": { # Status information per location (location name is key).
            # Example key: zones/us-central1-a
          "a_key": {
            "createdVmCount": 42, # [Output Only] Count of VMs successfully created so far.
            "deletedVmCount": 42, # [Output Only] Count of VMs that got deleted during rollback.
            "failedToCreateVmCount": 42, # [Output Only] Count of VMs that started creating but encountered an
                # error.
            "status": "A String", # [Output Only] Creation status of BulkInsert operation - information
                # if the flow is rolling forward or rolling back.
            "targetVmCount": 42, # [Output Only] Count of VMs originally planned to be created.
          },
        },
      },
      "kind": "compute#operation", # Output only. [Output Only] Type of the resource. Always `compute#operation` for
          # Operation resources.
      "name": "A String", # [Output Only] Name of the operation.
      "operationGroupId": "A String", # Output only. [Output Only] An ID that represents a group of operations, such as when a
          # group of operations results from a `bulkInsert` API request.
      "operationType": "A String", # [Output Only] The type of operation, such as `insert`,
          # `update`, or `delete`, and so on.
      "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100.
          # There is no requirement that this be linear or support any granularity of
          # operations. This should not be used to guess when the operation will be
          # complete. This number should monotonically increase as the operation
          # progresses.
      "region": "A String", # [Output Only] The URL of the region where the operation resides. Only
          # applicable when performing regional operations.
      "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
      "setCommonInstanceMetadataOperationMetadata": { # Output only. [Output Only] If the operation is for projects.setCommonInstanceMetadata,
          # this field will contain information on all underlying zonal actions and
          # their state.
        "clientOperationId": "A String", # [Output Only] The client operation id.
        "perLocationOperations": { # [Output Only] Status information per location (location name is key).
            # Example key: zones/us-central1-a
          "a_key": {
            "error": { # The `Status` type defines a logical error model that is suitable for # [Output Only] If state is `ABANDONED` or `FAILED`, this field is
                # populated.
                # different programming environments, including REST APIs and RPC APIs. It is
                # used by [gRPC](https://github.com/grpc). Each `Status` message contains
                # three pieces of data: error code, error message, and error details.
                #
                # You can find out more about this error model and how to work with it in the
                # [API Design Guide](https://cloud.google.com/apis/design/errors).
              "code": 42, # The status code, which should be an enum value of google.rpc.Code.
              "details": [ # A list of messages that carry the error details.  There is a common set of
                  # message types for APIs to use.
                {
                  "a_key": "", # Properties of the object. Contains field @type with type URL.
                },
              ],
              "message": "A String", # A developer-facing error message, which should be in English. Any
                  # user-facing error message should be localized and sent in the
                  # google.rpc.Status.details field, or localized by the client.
            },
            "state": "A String", # [Output Only] Status of the action, which can be one of the following:
                # `PROPAGATING`, `PROPAGATED`, `ABANDONED`, `FAILED`, or `DONE`.
          },
        },
      },
      "startTime": "A String", # [Output Only] The time that this operation was started by the server.
          # This value is inRFC3339
          # text format.
      "status": "A String", # [Output Only] The status of the operation, which can be one of the
          # following:
          # `PENDING`, `RUNNING`, or `DONE`.
      "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the
          # operation.
      "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation
          # of the target resource.
      "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies. For
          # operations related to creating a snapshot, this points to the disk
          # that the snapshot was created from.
      "user": "A String", # [Output Only] User who requested the operation, for example:
          # `user@example.com` or
          # `alice_smith_identifier (global/workforcePools/example-com-us-employees)`.
      "warnings": [ # [Output Only] If warning messages are generated during processing of the
          # operation, this field will be populated.
        {
          "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute
              # Engine returns NO_RESULTS_ON_PAGE if there
              # are no results in the response.
          "data": [ # [Output Only] Metadata about this warning in key:
              # value format. For example:
              #
              # "data": [
              #   {
              #    "key": "scope",
              #    "value": "zones/us-east1-d"
              #   }
            {
              "key": "A String", # [Output Only] A key that provides more detail on the warning being
                  # returned. For example, for warnings where there are no results in a list
                  # request for a particular zone, this key might be scope and
                  # the key value might be the zone name. Other examples might be a key
                  # indicating a deprecated resource and a suggested replacement, or a
                  # warning about invalid network settings (for example, if an instance
                  # attempts to perform IP forwarding but is not enabled for IP forwarding).
              "value": "A String", # [Output Only] A warning data value corresponding to the key.
            },
          ],
          "message": "A String", # [Output Only] A human-readable description of the warning code.
        },
      ],
      "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only
          # applicable when performing per-zone operations.
    }

`get(project, region, backendService, x__xgafv=None)`

    Returns the specified regional BackendService resource.

    Args:
      project: string, Project ID for this request. (required)
      region: string, Name of the region scoping this request. (required)
      backendService: string, Name of the BackendService resource to return. (required)
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Represents a Backend Service resource.
        #
        # A backend service defines how Google Cloud load balancers distribute traffic.
        # The backend service configuration contains a set of values, such as the
        # protocol used to connect to backends, various distribution and session
        # settings, health checks, and timeouts. These settings provide fine-grained
        # control over how your load balancer behaves. Most of the settings have
        # default values that allow for easy configuration if you need to get started
        # quickly.
        #
        # Backend services in Google Compute Engine can be either regionally or
        # globally scoped.
        #
        # * [Global](https://cloud.google.com/compute/docs/reference/rest/beta/backendServices)
        # * [Regional](https://cloud.google.com/compute/docs/reference/rest/beta/regionBackendServices)
        #
        # For more information, seeBackend
        # Services.
      "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds. This setting is applicable to Application
          # Load Balancers and Traffic Director and requires
          # GENERATED_COOKIE or HTTP_COOKIE session affinity.
          #
          # If set to 0, the cookie is non-persistent and lasts only until
          # the end of the browser session (or equivalent). The maximum allowed value
          # is two weeks (1,209,600).
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
      "backends": [ # The list of backends that serve this BackendService.
        { # Message containing information of one individual backend.
          "balancingMode": "A String", # Specifies how to determine whether the backend of a load balancer can
              # handle additional traffic or is fully loaded. For usage guidelines, see
              # Connection balancing mode.
              #
              # Backends must use compatible balancing modes. For more information, see
              # Supported balancing modes and target capacity settings and
              # Restrictions and guidance for instance groups.
              #
              # Note: Currently, if you use the API to configure incompatible balancing
              # modes, the configuration might be accepted even though it has no impact
              # and is ignored. Specifically, Backend.maxUtilization is ignored when
              # Backend.balancingMode is RATE. In the future, this incompatible combination
              # will be rejected.
          "capacityScaler": 3.14, # A multiplier applied to the backend's target capacity of its balancing
              # mode.
              # The default value is 1, which means the group serves up to
              # 100% of its configured capacity (depending onbalancingMode). A setting of 0 means the group is
              # completely drained, offering 0% of its available capacity. The valid ranges
              # are 0.0 and [0.1,1.0].
              # You cannot configure a setting larger than 0 and smaller than0.1.
              # You cannot configure a setting of 0 when there is only one
              # backend attached to the backend service.
              #
              # Not available with backends that don't support using abalancingMode. This includes backends such as global
              # internet NEGs, regional serverless NEGs, and PSC NEGs.
          "customMetrics": [ # List of custom metrics that are used for CUSTOM_METRICS
              # BalancingMode.
            { # Custom Metrics are used for CUSTOM_METRICS balancing_mode.
              "dryRun": True or False, # If true, the metric data is collected and reported to Cloud
                  # Monitoring, but is not used for load balancing.
              "maxUtilization": 3.14, # Optional parameter to define a target utilization for the Custom Metrics
                  # balancing mode. The valid range is [0.0, 1.0].
              "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
                  # long and match the regular expression
                  # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
                  # first character must be a lowercase letter, and all following
                  # characters must be a dash, period, underscore, lowercase letter, or
                  # digit, except the last character, which cannot be a dash, period, or
                  # underscore. For usage guidelines, see Custom Metrics balancing mode. This
                  # field can only be used for a global or regional backend service with the
                  # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
            },
          ],
          "description": "A String", # An optional description of this resource. Provide this property when you
              # create the resource.
          "failover": True or False, # This field designates whether this is a failover backend. More than one
              # failover backend can be configured for a given BackendService.
          "group": "A String", # The fully-qualified URL of aninstance
              # group or network endpoint
              # group (NEG) resource. To determine what types of backends a load
              # balancer supports, see the [Backend services
              # overview](https://cloud.google.com/load-balancing/docs/backend-service#backends).
              #
              # You must use the *fully-qualified* URL (starting withhttps://www.googleapis.com/) to specify the instance group
              # or NEG. Partial URLs are not supported.
              #
              # If haPolicy is specified, backends must refer to NEG resources of type
              # GCE_VM_IP.
          "maxConnections": 42, # Defines a target maximum number of simultaneous connections. For usage
              # guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode. Not available if the backend'sbalancingMode is RATE.
          "maxConnectionsPerEndpoint": 42, # Defines a target maximum number of simultaneous connections.  For usage
              # guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isRATE.
          "maxConnectionsPerInstance": 42, # Defines a target maximum number of simultaneous connections.
              # For usage guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isRATE.
          "maxInFlightRequests": 42, # Defines a maximum number of in-flight requests for the whole NEG or
              # instance group. Not available if backend's balancingMode isRATE or CONNECTION.
          "maxInFlightRequestsPerEndpoint": 42, # Defines a maximum number of in-flight requests for a single endpoint.
              # Not available if backend's balancingMode is RATE
              # or CONNECTION.
          "maxInFlightRequestsPerInstance": 42, # Defines a maximum number of in-flight requests for a single VM.
              # Not available if backend's balancingMode is RATE
              # or CONNECTION.
          "maxRate": 42, # Defines a maximum number of HTTP requests per second (RPS). For
              # usage guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxRatePerEndpoint": 3.14, # Defines a maximum target for requests per second (RPS). For usage
              # guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxRatePerInstance": 3.14, # Defines a maximum target for requests per second (RPS). For usage
              # guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxUtilization": 3.14, # Optional parameter to define a target capacity for theUTILIZATION balancing mode. The valid range is[0.0, 1.0].
              #
              # For usage guidelines, seeUtilization
              # balancing mode.
          "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend.
              # the backend.
            "resourceUri": "A String", # The URI of the resource or system that manages the backend.
          },
          "preference": "A String", # This field indicates whether this backend should be fully utilized before
              # sending traffic to backends with default preference. The possible values
              # are:
              #
              #    - PREFERRED: Backends with this preference level will be
              #    filled up to their capacity limits first, based on RTT.
              #    - DEFAULT:  If preferred backends don't have enough
              #    capacity, backends in this layer would be used and traffic would be
              #    assigned based on the load balancing algorithm you use. This is the
              #    default
          "service": "A String", # Represents a service backend (e.g., Cloud Run service, PSC Service
              # Attachment).
              # e.g.
              #  "run.googleapis.com/projects/123456789/locations/us-central1/services/my-service"
              #  for Cloud Run service.
              #  "compute.googleapis.com/projects/123456789/regions/us-central1/serviceAttachments/my-service-attachment"
              #  for PSC Service Attachment.
          "trafficDuration": "A String",
        },
      ],
      "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService. Only available for
          # specified load balancer types.
        "bypassCacheOnRequestHeaders": [ # Bypass the cache when the specified request headers are matched - e.g.
            # Pragma or Authorization headers. Up to 5 headers can be specified.
            # The cache is bypassed for all cdnPolicy.cacheMode settings.
          { # Bypass the cache when the specified request headers are present,
              # e.g. Pragma or Authorization headers. Values are case insensitive.
              # The presence of such a header overrides the cache_mode setting.
            "headerName": "A String", # The header field name to match on when bypassing cache.
                # Values are case-insensitive.
          },
        ],
        "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud # The CacheKeyPolicy for this CdnPolicy.
            # CDN.
          "includeHost": True or False, # If true, requests to different hosts will be cached separately.
          "includeHttpHeaders": [ # Allows HTTP request headers (by name) to be used in the cache key.
            "A String",
          ],
          "includeNamedCookies": [ # Allows HTTP cookies (by name) to be used in the cache key.
              # The name=value pair will be used in the cache key Cloud CDN generates.
            "A String",
          ],
          "includeProtocol": True or False, # If true, http and https requests will be cached separately.
          "includeQueryString": True or False, # If true, include query string parameters in the cache key according to
              # query_string_whitelist and query_string_blacklist. If neither is set, the
              # entire query string will be included. If false, the query string will be
              # excluded from the cache key entirely.
          "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other
              # parameters will be included. Either specify query_string_whitelist or
              # query_string_blacklist, not both. '&' and '=' will be percent encoded and
              # not treated as delimiters.
            "A String",
          ],
          "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other
              # parameters will be excluded. Either specify query_string_whitelist or
              # query_string_blacklist, not both. '&' and '=' will be percent encoded and
              # not treated as delimiters.
            "A String",
          ],
        },
        "cacheMode": "A String", # Specifies the cache setting for all responses from this backend.
            # The possible values are:USE_ORIGIN_HEADERS Requires the origin to set valid caching
            # headers to cache content. Responses without these headers will not be
            # cached at Google's edge, and will require a full trip to the origin on
            # every request, potentially impacting performance and increasing load on
            # the origin server.FORCE_CACHE_ALL Cache all content, ignoring any "private",
            # "no-store" or "no-cache" directives in Cache-Control response headers.
            # Warning: this may result in Cloud CDN caching private,
            # per-user (user identifiable) content.CACHE_ALL_STATIC Automatically cache static content,
            # including common image formats, media (video and audio), and web assets
            # (JavaScript and CSS). Requests and responses that are marked as
            # uncacheable, as well as dynamic content (including HTML), will not be
            # cached.
            #
            # If no value is provided for cdnPolicy.cacheMode, it defaults
            # to CACHE_ALL_STATIC.
        "clientTtl": 42, # Specifies a separate client (e.g. browser client) maximum TTL. This is
            # used to clamp the max-age (or Expires) value sent to the client.  With
            # FORCE_CACHE_ALL, the lesser of client_ttl and default_ttl is used for the
            # response max-age directive, along with a "public" directive.  For
            # cacheable content in CACHE_ALL_STATIC mode, client_ttl clamps the max-age
            # from the origin (if specified), or else sets the response max-age
            # directive to the lesser of the client_ttl and default_ttl, and also
            # ensures a "public" cache-control directive is present.
            # If a client TTL is not specified, a default value (1 hour) will be used.
            # The maximum allowed value is 31,622,400s (1 year).
        "defaultTtl": 42, # Specifies the default TTL for cached content served by this origin for
            # responses that do not have an existing valid TTL (max-age or s-maxage).
            # Setting a TTL of "0" means "always revalidate".
            # The value of defaultTTL cannot be set to a value greater than that of
            # maxTTL, but can be equal.
            # When the cacheMode is set to FORCE_CACHE_ALL, the defaultTTL
            # will overwrite the TTL set in all responses. The maximum allowed value is
            # 31,622,400s (1 year), noting that infrequently accessed objects may be
            # evicted from the cache before the defined TTL.
        "maxTtl": 42, # Specifies the maximum allowed TTL for cached content served by this
            # origin.
            # Cache directives that attempt to set a max-age or s-maxage higher than
            # this, or an Expires header more than maxTTL seconds in the future will
            # be capped at the value of maxTTL, as if it were the value of an
            # s-maxage Cache-Control directive.
            # Headers sent to the client will not be modified.
            # Setting a TTL of "0" means "always revalidate".
            # The maximum allowed value is 31,622,400s (1 year), noting that
            # infrequently accessed objects may be evicted from the cache before
            # the defined TTL.
        "negativeCaching": True or False, # Negative caching allows per-status code TTLs to be set, in order
            # to apply fine-grained caching for common errors or redirects.
            # This can reduce the load on your origin and improve end-user
            # experience by reducing response latency.
            # When the cache mode is set to CACHE_ALL_STATIC or USE_ORIGIN_HEADERS,
            # negative caching applies to responses with the specified response code
            # that lack any Cache-Control, Expires, or Pragma: no-cache directives.
            # When the cache mode is set to FORCE_CACHE_ALL, negative caching applies
            # to all responses with the specified response code, and override any
            # caching headers.
            # By default, Cloud CDN will apply the following default TTLs to these
            # status codes:
            # HTTP 300 (Multiple Choice), 301, 308 (Permanent Redirects): 10m
            # HTTP 404 (Not Found), 410 (Gone),
            # 451 (Unavailable For Legal Reasons): 120s
            # HTTP 405 (Method Not Found), 501 (Not Implemented): 60s.
            # These defaults can be overridden in negative_caching_policy.
        "negativeCachingPolicy": [ # Sets a cache TTL for the specified HTTP status code.
            # negative_caching must be enabled to configure negative_caching_policy.
            # Omitting the policy and leaving negative_caching enabled will use
            # Cloud CDN's default cache TTLs.
            # Note that when specifying an explicit negative_caching_policy, you
            # should take care to specify a cache TTL for all response codes
            # that you wish to cache. Cloud CDN will not apply any default
            # negative caching when a policy exists.
          { # Specify CDN TTLs for response error codes.
            "code": 42, # The HTTP status code to define a TTL against. Only HTTP status codes
                # 300, 301, 302, 307, 308, 404, 405, 410, 421, 451 and 501 can be
                # specified as values, and you cannot specify a status code more than
                # once.
            "ttl": 42, # The TTL (in seconds) for which to cache responses with the
                # corresponding status code.
                # The maximum allowed value is 1800s (30 minutes), noting that
                # infrequently accessed objects may be evicted from the cache before the
                # defined TTL.
          },
        ],
        "requestCoalescing": True or False, # If true then Cloud CDN will combine multiple concurrent cache fill
            # requests into a small number of requests to the origin.
        "serveWhileStale": 42, # Serve existing content from the cache (if available) when revalidating
            # content with the origin, or when an error is encountered when refreshing
            # the cache.
            # This setting defines the default "max-stale" duration for any cached
            # responses that do not specify a max-stale directive. Stale responses that
            # exceed the TTL configured here will not be served. The default limit
            # (max-stale) is 86400s (1 day), which will allow stale content to be
            # served up to this limit beyond the max-age (or s-maxage) of a cached
            # response.
            # The maximum allowed value is 604800 (1 week).
            # Set this to zero (0) to disable serve-while-stale.
        "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be
            # considered fresh. After this time period, the response will be
            # revalidated before being served. Defaults to 1hr (3600s).  When serving
            # responses to signed URL requests, Cloud CDN will internally behave as
            # though all responses from this backend had a "Cache-Control:
            # public, max-age=[TTL]" header, regardless of any existing
            # Cache-Control header. The actual headers served in responses will not be
            # altered.
        "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
          "A String",
        ],
      },
      "circuitBreakers": { # Settings controlling the volume of requests, connections and retries to this
          # backend service.
        "connectTimeout": { # A Duration represents a fixed-length span of time represented # The timeout for new network connections to hosts.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "maxConnections": 42, # The maximum number of connections to the backend service. If not specified,
            # there is no limit.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxPendingRequests": 42, # The maximum number of pending requests allowed to the backend service. If
            # not specified, there is no limit.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxRequests": 42, # The maximum number of parallel requests that allowed to the backend
            # service. If not specified, there is no limit.
        "maxRequestsPerConnection": 42, # Maximum requests for a single connection to the backend service.
            # This parameter is respected by both the HTTP/1.1 and HTTP/2
            # implementations. If not specified, there is no limit. Setting this
            # parameter to 1 will effectively disable keep alive.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxRetries": 42, # The maximum number of parallel retries allowed to the backend cluster. If
            # not specified, the default is 1.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
      },
      "compressionMode": "A String", # Compress text responses using Brotli or gzip compression, based on
          # the client's Accept-Encoding header.
      "connectionDraining": { # Message containing connection draining configuration. # connectionDraining cannot be specified with haPolicy.
        "drainingTimeoutSec": 42, # Configures a duration timeout for existing requests on a removed backend
            # instance. For supported load balancers and protocols, as described inEnabling
            # connection draining.
      },
      "connectionTrackingPolicy": { # Connection Tracking configuration for this BackendService. # Connection Tracking configuration for this BackendService. Connection
          # tracking policy settings are only available for external passthrough
          # Network Load Balancers and internal passthrough Network Load Balancers.
          #
          # connectionTrackingPolicy cannot be specified with haPolicy.
        "connectionPersistenceOnUnhealthyBackends": "A String", # Specifies connection persistence when backends are unhealthy. The default
            # value is DEFAULT_FOR_PROTOCOL.
            #
            # If set to DEFAULT_FOR_PROTOCOL, the existing connections
            # persist on unhealthy backends only for connection-oriented protocols
            # (TCP and SCTP) and only if the Tracking Mode isPER_CONNECTION (default tracking mode) or the Session
            # Affinity is configured for 5-tuple. They do not persist forUDP.
            #
            # If set to NEVER_PERSIST, after a backend becomes unhealthy,
            # the existing connections on the unhealthy backend are never persisted on
            # the unhealthy backend. They are always diverted to newly selected healthy
            # backends (unless all backends are unhealthy).
            #
            # If set to ALWAYS_PERSIST, existing connections always
            # persist on unhealthy backends regardless of protocol and session
            # affinity. It is generally not recommended to use this mode overriding the
            # default.
            #
            # For more details, see [Connection Persistence for Network Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#connection-persistence)
            # and [Connection Persistence for Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal#connection-persistence).
        "enableStrongAffinity": True or False, # Enable Strong Session Affinity for external passthrough Network Load
            # Balancers. This option is not available publicly.
        "idleTimeoutSec": 42, # Specifies how long to keep a Connection Tracking entry while there is no
            # matching traffic (in seconds).
            #
            # For internal passthrough Network Load Balancers:
            #
            #    - The minimum (default) is 10 minutes and the maximum is 16 hours.
            #    - It can be set only if Connection Tracking is less than 5-tuple
            #    (i.e. Session Affinity is CLIENT_IP_NO_DESTINATION,CLIENT_IP or CLIENT_IP_PROTO, and Tracking
            #    Mode is PER_SESSION).
            #
            #
            #
            # For external passthrough Network Load Balancers the default is 60
            # seconds. This option is not available publicly.
        "trackingMode": "A String", # Specifies the key used for connection tracking. There are two
            # options:
            #
            #    - PER_CONNECTION: This is the default mode. The Connection
            #    Tracking is performed as per the Connection Key (default Hash Method) for
            #    the specific protocol.
            #    - PER_SESSION: The Connection Tracking is performed as per
            #    the configured Session Affinity. It matches the configured Session
            #    Affinity.
            #
            #
            #
            # For more details, see [Tracking Mode for Network Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#tracking-mode)
            # and [Tracking Mode for Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal#tracking-mode).
      },
      "consistentHash": { # This message defines settings for a consistent hash style load balancer. # Consistent Hash-based load balancing can be used to provide soft session
          # affinity based on HTTP headers, cookies or other properties. This load
          # balancing policy is applicable only for HTTP connections. The affinity to a
          # particular destination host will be lost when one or more hosts are
          # added/removed from the destination service. This field specifies parameters
          # that control consistent hashing. This field is only applicable whenlocalityLbPolicy is set to MAGLEV orRING_HASH.
          #
          # This field is applicable to either:
          #
          #    - A regional backend service with the service protocol set to HTTP,
          #    HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
          #    INTERNAL_MANAGED.
          #    - A global backend service with the
          #    load_balancing_scheme set to INTERNAL_SELF_MANAGED.
        "httpCookie": { # The information about the HTTP Cookie on which the hash function is based # Hash is based on HTTP Cookie. This field describes a HTTP cookie that will
            # be used as the hash key for the consistent hash load balancer. If the
            # cookie is not present, it will be generated. This field is applicable if
            # the sessionAffinity is set to HTTP_COOKIE.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
            # for load balancing policies that use a consistent hash.
          "name": "A String", # Name of the cookie.
          "path": "A String", # Path to set for the cookie.
          "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
              # as a count of seconds and fractions of seconds at nanosecond
              # resolution. It is independent of any calendar and concepts like "day"
              # or "month". Range is approximately 10,000 years.
            "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                # Durations less than one second are represented with a 0
                # `seconds` field and a positive `nanos` field. Must be from 0
                # to 999,999,999 inclusive.
            "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
          },
        },
        "httpHeaderName": "A String", # The hash based on the value of the specified header field. This field is
            # applicable if the sessionAffinity is set toHEADER_FIELD.
        "minimumRingSize": "A String", # The minimum number of virtual nodes to use for the hash ring. Defaults to
            # 1024. Larger ring sizes result in more granular load distributions. If the
            # number of hosts in the load balancing pool is larger than the ring size,
            # each host will be assigned a single virtual node.
      },
      "creationTimestamp": "A String", # Output only. [Output Only] Creation timestamp inRFC3339
          # text format.
      "customMetrics": [ # List of custom metrics that are used for theWEIGHTED_ROUND_ROBIN locality_lb_policy.
        { # Custom Metrics are used for WEIGHTED_ROUND_ROBIN
            # locality_lb_policy.
          "dryRun": True or False, # If true, the metric data is not used for load balancing.
          "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
              # long and match the regular expression
              # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
              # first character must be a lowercase letter, and all following
              # characters must be a dash, period, underscore, lowercase letter, or
              # digit, except the last character, which cannot be a dash, period, or
              # underscore. For usage guidelines, see Custom Metrics balancing mode. This
              # field can only be used for a global or regional backend service with the
              # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
        },
      ],
      "customRequestHeaders": [ # Headers that the load balancer adds to proxied requests. See [Creating
          # custom
          # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
        "A String",
      ],
      "customResponseHeaders": [ # Headers that the load balancer adds to proxied responses. See [Creating
          # custom
          # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
        "A String",
      ],
      "description": "A String", # An optional description of this resource. Provide this property when you
          # create the resource.
      "dynamicForwarding": { # Defines a dynamic forwarding configuration for the backend service. # Dynamic forwarding configuration. This field is used to configure the
          # backend service with dynamic forwarding feature which together with Service
          # Extension allows customized and complex routing logic.
        "forwardProxy": { # Defines Dynamic Forwarding Proxy configuration. # Dynamic Forwarding Proxy configuration.
          "enabled": True or False, # A boolean flag enabling dynamic forwarding proxy.
          "proxyMode": "A String", # Determines the dynamic forwarding proxy mode.
        },
        "ipPortSelection": { # Defines a IP:PORT based dynamic forwarding configuration for the backend # IP:PORT based dynamic forwarding configuration.
            # service. Some ranges are restricted: Restricted
            # ranges.
          "enabled": True or False, # A boolean flag enabling IP:PORT based dynamic forwarding.
        },
      },
      "edgeSecurityPolicy": "A String", # [Output Only] The resource URL for the edge security policy associated with
          # this backend service.
      "enableCDN": True or False, # If true, enables Cloud CDN for the backend service of a
          # global external Application Load Balancer.
      "externalManagedMigrationState": "A String", # Specifies the canary migration state. Possible values are PREPARE,
          # TEST_BY_PERCENTAGE, and TEST_ALL_TRAFFIC.
          #
          # To begin the migration from EXTERNAL to EXTERNAL_MANAGED, the state must be
          # changed to PREPARE. The state must be changed to TEST_ALL_TRAFFIC before
          # the loadBalancingScheme can be changed to EXTERNAL_MANAGED. Optionally, the
          # TEST_BY_PERCENTAGE state can be used to migrate traffic by percentage using
          # externalManagedMigrationTestingPercentage.
          #
          # Rolling back a migration requires the states to be set in reverse order. So
          # changing the scheme from EXTERNAL_MANAGED to EXTERNAL requires the state to
          # be set to TEST_ALL_TRAFFIC at the same time. Optionally, the
          # TEST_BY_PERCENTAGE state can be used to migrate some traffic back to
          # EXTERNAL or PREPARE can be used to migrate all traffic back to EXTERNAL.
      "externalManagedMigrationTestingPercentage": 3.14, # Determines the fraction of requests that should be processed by the Global
          # external Application Load Balancer.
          #
          # The value of this field must be in the range [0, 100].
          #
          # Session affinity options will slightly affect this routing behavior, for
          # more details, see:Session
          # Affinity.
          #
          # This value can only be set if the loadBalancingScheme in the BackendService
          # is set to EXTERNAL (when using the classic Application Load Balancer) and
          # the migration state is TEST_BY_PERCENTAGE.
      "failoverPolicy": { # For load balancers that have configurable # Requires at least one backend instance group to be defined
          # as a backup (failover) backend.
          # For load balancers that have configurable failover:
          # [Internal passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
          # and [external passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
          #
          # failoverPolicy cannot be specified with haPolicy.
          # failover:
          # [Internal passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
          # and [external passthrough
          # Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
          # On failover or failback, this field indicates whether connection draining
          # will be honored. Google Cloud has a fixed connection draining timeout of
          # 10 minutes. A setting of true terminates existing TCP
          # connections to the active pool during failover and failback, immediately
          # draining traffic. A setting of false allows existing TCP
          # connections to persist, even on VMs no longer in the active pool, for up
          # to the duration of the connection draining timeout (10 minutes).
        "disableConnectionDrainOnFailover": True or False, # This can be set to true if the protocol isTCP, UDP, or UNSPECIFIED.
            #
            # The default is false.
        "dropTrafficIfUnhealthy": True or False, # If set to true, connections to the
            # load balancer are dropped when all primary and all backup backend VMs are
            # unhealthy.If set to false, connections are distributed
            # among all primary VMs when all primary and all backup backend VMs are
            #  unhealthy.
            # For load balancers that have configurable
            # failover:
            # [Internal passthrough
            # Network Load
            # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
            # and [external passthrough
            # Network Load
            # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
            # The default is false.
        "failoverRatio": 3.14, # The value of the field must be in the range[0, 1]. If the value is 0, the load balancer performs a
            # failover when the number of healthy primary VMs equals zero.
            # For all other values, the load balancer performs a failover when the
            # total number of healthy primary VMs is less than this ratio.
            # For load balancers that have configurable
            # failover:
            # [Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
            # and [external TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
      },
      "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object.
          # This field is used in optimistic locking. This field will be ignored when
          # inserting a BackendService. An up-to-date fingerprint must be provided in
          # order to update the BackendService, otherwise the request will
          # fail with error 412 conditionNotMet.
          #
          # To see the latest fingerprint, make a get() request to
          # retrieve a BackendService.
      "haPolicy": { # Configures self-managed High Availability (HA) for External and Internal
          # Protocol Forwarding.
          #
          # The backends of this regional backend service must only specify zonal
          # network endpoint groups (NEGs) of type GCE_VM_IP.
          #
          # When haPolicy is set for an Internal Passthrough Network Load Balancer, the
          # regional backend service must set the network field. All zonal NEGs must
          # belong to the same network. However, individual NEGs can
          # belong to different subnetworks of that network.
          #
          # When haPolicy is specified, the set of attached network endpoints across
          # all backends comprise an High Availability domain from which one endpoint
          # is selected as the active endpoint (the leader) that receives all
          # traffic.
          #
          # haPolicy can be added only at backend service creation time. Once set up,
          # it cannot be deleted.
          #
          # Note that haPolicy is not for load balancing, and therefore cannot be
          # specified with sessionAffinity, connectionTrackingPolicy, and
          # failoverPolicy.
          #
          # haPolicy requires customers to be responsible for tracking backend
          # endpoint health and electing a leader among the healthy endpoints.
          # Therefore, haPolicy cannot be specified with healthChecks.
          #
          # haPolicy can only be specified for External Passthrough Network Load
          # Balancers and Internal Passthrough Network Load Balancers.
        "fastIPMove": "A String", # Specifies whether fast IP move is enabled, and if so, the mechanism to
            # achieve it.
            #
            # Supported values are:
            #
            #    - DISABLED: Fast IP Move is disabled. You can only use the
            #    haPolicy.leader API to update the leader.
            #    - >GARP_RA: Provides a method to very quickly define a new network
            #    endpoint as the leader. This method is faster than updating the leader
            #    using the haPolicy.leader API. Fast IP move works as follows: The VM
            #    hosting the network endpoint that should become the new leader sends
            #    either a Gratuitous ARP (GARP) packet (IPv4) or an ICMPv6 Router
            #    Advertisement(RA) packet (IPv6).  Google Cloud immediately but
            #    temporarily associates the forwarding rule IP address with that VM, and
            #    both new and in-flight packets are quickly delivered to that VM.
            #
            #
            #
            # Note the important properties of the Fast IP Move functionality:
            #
            #    - The GARP/RA-initiated re-routing stays active for approximately 20
            #    minutes. After triggering fast failover, you must also
            #    appropriately set the haPolicy.leader.
            #    -  The new leader instance should continue to send GARP/RA packets
            #    periodically every 10 seconds until at least 10 minutes after updating
            #    the haPolicy.leader (but stop immediately if it is no longer the leader).
            #    - After triggering a fast failover, we recommend that you wait at least
            #    3 seconds before sending another GARP/RA packet from a different VM
            #    instance to avoid race conditions.
            #    - Don't send GARP/RA packets from different VM
            #    instances at the same time. If multiple instances continue to send
            #    GARP/RA packets, traffic might be routed to different destinations in an
            #    alternating order. This condition ceases when a single instance
            #    issues a GARP/RA packet.
            #    - The GARP/RA request always takes priority over the leader API.
            #    Using the haPolicy.leader API to change the leader to a different
            #    instance will have no effect until the GARP/RA request becomes
            #    inactive.
            #    - The GARP/RA packets should follow the GARP/RA
            #    Packet Specifications..
            #    -  When multiple forwarding rules refer to a regional backend service,
            #    you need only send a GARP or RA packet for a single forwarding rule
            #    virtual IP. The virtual IPs for all forwarding rules targeting the same
            #    backend service will also be moved to the sender of the GARP or RA
            #    packet.
            #
            #
            #
            # The following are the Fast IP Move limitations (that is, when fastIPMove
            # is not DISABLED):
            #
            #    - Multiple forwarding rules cannot use the same IP address if one of
            #    them refers to a regional backend service with fastIPMove.
            #    - The regional backend service must set the network field, and all
            #    NEGs must belong to that network. However, individual
            #    NEGs can belong to different subnetworks of that network.
            #    - The maximum number of network endpoints across all backends of a
            #    backend service with fastIPMove is 32.
            #    - The maximum number of backend services with fastIPMove that can have
            #    the same network endpoint attached to one of its backends is 64.
            #    - The maximum number of backend services with fastIPMove in a VPC in a
            #    region is 64.
            #    - The network endpoints that are attached to a backend of a backend
            #    service with fastIPMove cannot resolve to Gen3+ machines for IPv6.
            #    - Traffic directed to the leader by a static route next hop will not be
            #    redirected to a new leader by fast failover. Such traffic will only be
            #    redirected once an haPolicy.leader update has taken effect. Only traffic
            #    to the forwarding rule's virtual IP will be redirected to a new leader by
            #    fast failover.
            #
            #
            # haPolicy.fastIPMove can be set only at backend service creation time.
            # Once set, it cannot be updated.
            #
            # By default, fastIpMove is set to DISABLED.
        "leader": { # Selects one of the network endpoints attached to the backend NEGs of
            # this service as the active endpoint (the leader) that receives all
            # traffic.
            #
            # When the leader changes, there is no connection draining to persist
            # existing connections on the old leader.
            #
            # You are responsible for selecting a suitable endpoint as the
            # leader. For example, preferring a healthy endpoint over unhealthy ones.
            # Note that this service does not track backend endpoint health, and
            # selects the configured leader unconditionally.
          "backendGroup": "A String", # A fully-qualified URL (starting with https://www.googleapis.com/)
              # of the zonal Network Endpoint Group (NEG) with `GCE_VM_IP` endpoints
              # that the leader is attached to.
              #
              # The leader's backendGroup must already be specified as a backend of
              # this backend service. Removing a backend that is designated as the
              # leader's backendGroup is not permitted.
          "networkEndpoint": { # The network endpoint within the leader.backendGroup that is
              # designated as the leader.
              #
              # This network endpoint cannot be detached from the NEG specified in
              # the haPolicy.leader.backendGroup until the leader is updated with
              # another network endpoint, or the leader is removed from the haPolicy.
            "instance": "A String", # The name of the VM instance of the leader network endpoint. The
                # instance must already be attached to the NEG specified in the
                # haPolicy.leader.backendGroup.
                #
                # The name must be 1-63 characters long, and comply with RFC1035.
                # Authorization requires the following IAM permission on the
                # specified resource instance: compute.instances.use
          },
        },
      },
      "healthChecks": [ # The list of URLs to the healthChecks, httpHealthChecks (legacy), or
          # httpsHealthChecks (legacy) resource for health checking this backend
          # service. Not all backend services support legacy health checks. See
          # Load balancer guide. Currently, at most one health check can be
          # specified for each backend service. Backend services with
          # instance group or zonal NEG backends must have a health check unless
          # haPolicy is specified. Backend services with internet or serverless NEG
          # backends must not have a health check.
          #
          # healthChecks[] cannot be specified with haPolicy.
        "A String",
      ],
      "iap": { # Identity-Aware Proxy # The configurations for Identity-Aware Proxy on this resource.
          # Not available for internal passthrough Network Load Balancers and external
          # passthrough Network Load Balancers.
        "enabled": True or False, # Whether the serving infrastructure will authenticate and authorize all
            # incoming requests.
        "oauth2ClientId": "A String", # OAuth2 client ID to use for the authentication flow.
        "oauth2ClientSecret": "A String", # OAuth2 client secret to use for the authentication flow.
            # For security reasons, this value cannot be retrieved via the API.
            # Instead, the SHA-256 hash of the value is returned in the
            # oauth2ClientSecretSha256 field.
            #
            # @InputOnly
        "oauth2ClientSecretSha256": "A String", # Output only. [Output Only] SHA256 hash value for the field oauth2_client_secret above.
      },
      "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is
          # defined by the server.
      "ipAddressSelectionPolicy": "A String", # Specifies a preference for traffic sent from the proxy to the backend (or
          # from the client to the backend for proxyless gRPC).
          # The possible values are:
          #
          #    - IPV4_ONLY: Only send IPv4 traffic to the backends of the
          #    backend service (Instance Group, Managed Instance Group, Network Endpoint
          #    Group), regardless of traffic from the client to the proxy. Only IPv4
          #    health checks are used to check the health of the backends. This is the
          #    default setting.
          #    - PREFER_IPV6: Prioritize the connection to the endpoint's
          #    IPv6 address over its IPv4 address (provided there is a healthy IPv6
          #    address).
          #    - IPV6_ONLY: Only send IPv6 traffic to the backends of the
          #    backend service (Instance Group, Managed Instance Group, Network Endpoint
          #    Group), regardless of traffic from the client to the proxy. Only IPv6
          #    health checks are used to check the health of the backends.
          #
          #
          #
          # This field is applicable to either:
          #
          #    -  Advanced global external Application Load Balancer (load balancing
          #    scheme EXTERNAL_MANAGED),
          #    -  Regional external Application Load
          #    Balancer,
          #    -  Internal proxy Network Load Balancer (load balancing
          #    scheme INTERNAL_MANAGED),
          #    -  Regional internal Application Load
          #    Balancer (load balancing scheme INTERNAL_MANAGED),
          #    -  Traffic
          #    Director with Envoy proxies and proxyless gRPC (load balancing scheme
          #    INTERNAL_SELF_MANAGED).
      "kind": "compute#backendService", # Output only. [Output Only] Type of resource. Always compute#backendService
          # for backend services.
      "loadBalancingScheme": "A String", # Specifies the load balancer type. A backend service
          # created for one type of load balancer cannot be used with another.
          # For more information, refer toChoosing
          # a load balancer.
      "localityLbPolicies": [ # A list of locality load-balancing policies to be used in order of
          # preference. When you use localityLbPolicies, you must set at least one
          # value for either the localityLbPolicies[].policy or the
          # localityLbPolicies[].customPolicy field. localityLbPolicies overrides any
          # value set in the localityLbPolicy field.
          #
          # For an example of how to use this field, seeDefine
          # a list of preferred policies.
          #
          # Caution: This field and its children are intended for use in a service mesh
          # that includes gRPC clients only. Envoy proxies can't use backend services
          # that have this configuration.
        { # Container for either a built-in LB policy supported by gRPC or Envoy or
            # a custom one implemented by the end user.
          "customPolicy": { # The configuration for a custom policy implemented by the user and
              # deployed with the client.
            "data": "A String", # An optional, arbitrary JSON object with configuration data, understood
                # by a locally installed custom policy implementation.
            "name": "A String", # Identifies the custom policy.
                #
                # The value should match the name of a custom implementation registered
                # on the gRPC clients. It should follow protocol buffer message naming
                # conventions and include the full path (for example,
                # myorg.CustomLbPolicy). The maximum length is 256 characters.
                #
                # Do not specify the same custom policy more than once for a
                # backend. If you do, the configuration is rejected.
                #
                # For an example of how to use this field, seeUse
                # a custom policy.
          },
          "policy": { # The configuration for a built-in load balancing policy.
            "name": "A String", # The name of a locality load-balancing policy. Valid values include
                # ROUND_ROBIN and, for Java clients, LEAST_REQUEST. For information
                # about these values, see the description of localityLbPolicy.
                #
                # Do not specify the same policy more than once for a
                # backend. If you do, the configuration is rejected.
          },
        },
      ],
      "localityLbPolicy": "A String", # The load balancing algorithm used within the scope of the locality. The
          # possible values are:
          #
          #    - ROUND_ROBIN: This is a simple policy in which each healthy
          #    backend is selected in round robin order. This is the default.
          #    - LEAST_REQUEST: An O(1) algorithm which
          #    selects two random healthy hosts and picks the host which has fewer active
          #    requests.
          #    - RING_HASH: The ring/modulo hash load balancer implements
          #    consistent hashing to backends. The algorithm has the property that the
          #    addition/removal of a host from a set of N hosts only affects 1/N of the
          #    requests.
          #    - RANDOM: The load balancer selects a random healthy
          #    host.
          #    - ORIGINAL_DESTINATION: Backend host is selected
          #    based on the client connection metadata, i.e., connections are opened to
          #    the same address as the destination address of the incoming connection
          #    before the connection was redirected to the load balancer.
          #    - MAGLEV: used as a drop in replacement for the ring hash
          #    load balancer. Maglev is not as stable as ring hash but has faster table
          #    lookup build times and host selection times. For more information about
          #    Maglev, see Maglev:
          #    A Fast and Reliable Software Network Load Balancer.
          #    - WEIGHTED_ROUND_ROBIN: Per-endpoint Weighted Round Robin
          #    Load Balancing using weights computed from Backend reported Custom Metrics.
          #    If set, the Backend Service responses are expected to contain non-standard
          #    HTTP response header field Endpoint-Load-Metrics. The reported
          #    metrics to use for computing the weights are specified via thecustomMetrics field.
          #
          #    This field is applicable to either:
          #       - A regional backend service with the service protocol set to HTTP,
          #       HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
          #       INTERNAL_MANAGED.
          #       - A global backend service with the
          #       load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or
          #       EXTERNAL_MANAGED.
          #
          #
          #    If sessionAffinity is not configured—that is, if session
          #    affinity remains at the default value of NONE—then the
          #    default value for localityLbPolicy
          #    is ROUND_ROBIN. If session affinity is set to a value other
          #    than NONE,
          #    then the default value for localityLbPolicy isMAGLEV.
          #
          #    Only ROUND_ROBIN and RING_HASH are supported
          #    when the backend service is referenced by a URL map that is bound to
          #    target gRPC proxy that has validateForProxyless field set to true.
          #
          #    localityLbPolicy cannot be specified with haPolicy.
      "logConfig": { # The available logging options for the load balancer traffic served by this # This field denotes the logging options for the load balancer traffic served
          # by this backend service. If logging is enabled, logs will be exported to
          # Stackdriver.
          # backend service.
        "enable": True or False, # Denotes whether to enable logging for the load balancer
            # traffic served by this backend service. The default value is false.
        "optionalFields": [ # This field can only be specified if logging is enabled for this backend
            # service and "logConfig.optionalMode" was set to CUSTOM. Contains a list
            # of optional fields you want to include in the logs. For example:
            # serverInstance, serverGkeDetails.cluster,
            # serverGkeDetails.pod.podNamespace
          "A String",
        ],
        "optionalMode": "A String", # This field can only be specified if logging is enabled for this backend
            # service. Configures whether all, none or a subset of optional fields
            # should be added to the reported logs. One of [INCLUDE_ALL_OPTIONAL,
            # EXCLUDE_ALL_OPTIONAL, CUSTOM]. Default is EXCLUDE_ALL_OPTIONAL.
        "sampleRate": 3.14, # This field can only be specified if logging is enabled for this backend
            # service. The value of the field must be in [0, 1]. This configures the
            # sampling rate of requests to the load balancer where 1.0 means all logged
            # requests are reported and 0.0 means no logged requests are reported. The
            # default value is 1.0.
      },
      "maxStreamDuration": { # A Duration represents a fixed-length span of time represented # Specifies the default maximum duration (timeout) for streams to this
          # service. Duration is computed from the beginning of the stream until the
          # response has been completely processed, including all retries. A stream
          # that does not complete in this duration is closed.
          #
          # If not specified, there will be no timeout limit, i.e. the maximum
          # duration is infinite.
          #
          # This value can be overridden in the PathMatcher configuration of the
          # UrlMap that references this backend service.
          #
          # This field is only allowed when the loadBalancingScheme of
          # the backend service is INTERNAL_SELF_MANAGED.
          # as a count of seconds and fractions of seconds at nanosecond
          # resolution. It is independent of any calendar and concepts like "day"
          # or "month". Range is approximately 10,000 years.
        "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
            # Durations less than one second are represented with a 0
            # `seconds` field and a positive `nanos` field. Must be from 0
            # to 999,999,999 inclusive.
        "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
            # to 315,576,000,000 inclusive. Note: these bounds are computed from:
            # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
      },
      "metadatas": { # Deployment metadata associated with the resource to be set by a GKE hub
          # controller and read by the backend RCTH
        "a_key": "A String",
      },
      "name": "A String", # Name of the resource. Provided by the client when the resource is created.
          # The name must be 1-63 characters long, and comply withRFC1035.
          # Specifically, the name must be 1-63 characters long and match the regular
          # expression `[a-z]([-a-z0-9]*[a-z0-9])?` which means the first
          # character must be a lowercase letter, and all following characters must
          # be a dash, lowercase letter, or digit, except the last character, which
          # cannot be a dash.
      "network": "A String", # The URL of the network to which this backend service belongs.
          #
          # This field must be set for Internal Passthrough Network Load Balancers when
          # the haPolicy is enabled, and for External Passthrough Network Load
          # Balancers when the haPolicy fastIpMove is enabled.
          #
          # This field can only be specified when the load balancing scheme is set toINTERNAL, or when the load balancing scheme is set toEXTERNAL and haPolicy fastIpMove is enabled.
      "networkPassThroughLbTrafficPolicy": { # Configures traffic steering properties of internal passthrough Network
          # Load Balancers.
          #
          # networkPassThroughLbTrafficPolicy cannot be specified with haPolicy.
        "zonalAffinity": { # When configured, new connections are load balanced across healthy backend
            # endpoints in the local zone.
          "spillover": "A String", # This field indicates whether zonal affinity is enabled or not. The
              # possible values are:
              #
              #    - ZONAL_AFFINITY_DISABLED: Default Value. Zonal Affinity
              #    is disabled. The load balancer distributes new connections to all
              #    healthy backend endpoints across all zones.
              #    - ZONAL_AFFINITY_STAY_WITHIN_ZONE: Zonal Affinity is
              #    enabled. The load balancer distributes new connections to all healthy
              #    backend endpoints in the local zone only. If there are no healthy
              #    backend endpoints in the local zone, the load balancer distributes
              #    new connections to all backend endpoints in the local zone.
              #    - ZONAL_AFFINITY_SPILL_CROSS_ZONE: Zonal Affinity is
              #    enabled. The load balancer distributes new connections to all healthy
              #    backend endpoints in the local zone only. If there aren't enough
              #    healthy backend endpoints in the local zone, the load balancer
              #    distributes new connections to all healthy backend endpoints across all
              #    zones.
          "spilloverRatio": 3.14, # The value of the field must be in [0, 1]. When the ratio of the count
              # of healthy backend endpoints in a zone to the count of backend
              # endpoints in that same zone is equal to or above this threshold, the
              # load balancer distributes new connections to all healthy endpoints in
              # the local zone only. When the ratio of the count of healthy backend
              # endpoints in a zone to the count of backend endpoints in that same
              # zone is below this threshold, the load balancer distributes all new
              # connections to all healthy endpoints across all zones.
        },
      },
      "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend service.
          # the backend service.
        "resourceUri": "A String", # The resource URI of the resource or system that manages the backend
            # service.
      },
      "outlierDetection": { # Settings controlling the eviction of unhealthy hosts from the load balancing # Settings controlling the ejection of unhealthy backend endpoints from the
          # load balancing pool of each individual proxy instance that processes the
          # traffic for the given backend service. If not set, this feature is
          # considered disabled.
          #
          # Results of the outlier detection algorithm (ejection of endpoints from the
          # load balancing pool and returning them back to the pool) are executed
          # independently by each proxy instance of the load balancer. In most cases,
          # more than one proxy instance handles the traffic received by a backend
          # service. Thus, it is possible that an unhealthy endpoint is detected and
          # ejected by only some of the proxies, and while this happens, other proxies
          # may continue to send requests to the same unhealthy endpoint until they
          # detect and eject the unhealthy endpoint.
          #
          # Applicable backend endpoints can be:
          #
          #    - VM instances in an Instance Group
          #    - Endpoints in a Zonal NEG (GCE_VM_IP, GCE_VM_IP_PORT)
          #    - Endpoints in a Hybrid Connectivity NEG (NON_GCP_PRIVATE_IP_PORT)
          #    - Serverless NEGs, that resolve to Cloud Run, App Engine, or Cloud
          #    Functions Services
          #    - Private Service Connect NEGs, that resolve to
          #    Google-managed regional API endpoints or managed services published using
          #    Private Service Connect
          #
          #
          #
          # Applicable backend service types can be:
          #
          #    - A global backend service with the loadBalancingScheme set to
          #    INTERNAL_SELF_MANAGED or EXTERNAL_MANAGED.
          #    - A regional backend
          #    service with the service protocol set to HTTP, HTTPS, HTTP2 or H2C, and
          #    loadBalancingScheme set to INTERNAL_MANAGED or EXTERNAL_MANAGED. Not
          #    supported for Serverless NEGs.
          #
          #
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
          # pool for the backend service.
        "baseEjectionTime": { # A Duration represents a fixed-length span of time represented # The base time that a backend endpoint is ejected for. Defaults to 30000ms
            # or 30s.
            #
            # After a backend endpoint is returned back to the load balancing pool, it
            # can be ejected again in another ejection analysis. Thus, the total ejection
            # time is equal to the base ejection time multiplied by the number of times
            # the backend endpoint has been ejected. Defaults to 30000ms or 30s.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "consecutiveErrors": 42, # Number of consecutive errors before a backend endpoint is ejected from the
            # load balancing pool. When the backend endpoint is accessed over HTTP, a 5xx
            # return code qualifies as an error. Defaults to 5.
        "consecutiveGatewayFailure": 42, # The number of consecutive gateway failures (502, 503, 504 status or
            # connection errors that are mapped to one of those status codes) before a
            # consecutive gateway failure ejection occurs. Defaults to 3.
        "enforcingConsecutiveErrors": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through consecutive 5xx. This setting can be
            # used to disable ejection or to ramp it up slowly. Defaults to 0.
        "enforcingConsecutiveGatewayFailure": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through consecutive gateway failures. This
            # setting can be used to disable ejection or to ramp it up slowly. Defaults
            # to 100.
        "enforcingSuccessRate": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through success rate statistics. This setting
            # can be used to disable ejection or to ramp it up slowly. Defaults to 100.
            #
            # Not supported when the backend service uses Serverless NEG.
        "interval": { # A Duration represents a fixed-length span of time represented # Time interval between ejection analysis sweeps. This can result in both new
            # ejections and backend endpoints being returned to service. The interval is
            # equal to the number of seconds as defined in
            # outlierDetection.interval.seconds plus the number of nanoseconds as defined
            # in outlierDetection.interval.nanos. Defaults to 1 second.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "maxEjectionPercent": 42, # Maximum percentage of backend endpoints in the load balancing pool for the
            # backend service that can be ejected if the ejection conditions are met.
            # Defaults to 50%.
        "successRateMinimumHosts": 42, # The number of backend endpoints in the load balancing pool that must have
            # enough request volume to detect success rate outliers. If the number of
            # backend endpoints is fewer than this setting, outlier detection via success
            # rate statistics is not performed for any backend endpoint in the load
            # balancing pool. Defaults to 5.
            #
            # Not supported when the backend service uses Serverless NEG.
        "successRateRequestVolume": 42, # The minimum number of total requests that must be collected in one interval
            # (as defined by the interval duration above) to include this backend
            # endpoint in success rate based outlier detection. If the volume is lower
            # than this setting, outlier detection via success rate statistics is not
            # performed for that backend endpoint. Defaults to 100.
            #
            # Not supported when the backend service uses Serverless NEG.
        "successRateStdevFactor": 42, # This factor is used to determine the ejection threshold for success rate
            # outlier ejection. The ejection threshold is the difference between the mean
            # success rate, and the product of this factor and the standard deviation of
            # the mean success rate: mean - (stdev * successRateStdevFactor). This factor
            # is divided by a thousand to get a double. That is, if the desired factor
            # is 1.9, the runtime value should be 1900. Defaults to 1900.
            #
            # Not supported when the backend service uses Serverless NEG.
      },
      "params": { # Additional Backend Service parameters. # Input only. [Input Only] Additional params passed with the request, but not persisted
          # as part of resource payload.
        "resourceManagerTags": { # Tag keys/values directly bound to this resource.
            # Tag keys and values have the same definition as resource
            # manager tags. The field is allowed for INSERT
            # only. The keys/values to set on the resource should be specified in
            # either ID { : } or Namespaced format
            # { : }.
            # For example the following are valid inputs:
            # * {"tagKeys/333" : "tagValues/444", "tagKeys/123" : "tagValues/456"}
            # * {"123/environment" : "production", "345/abc" : "xyz"}
            # Note:
            # * Invalid combinations of ID & namespaced format is not supported. For
            #   instance: {"123/environment" : "tagValues/444"} is invalid.
          "a_key": "A String",
        },
      },
      "port": 42, # Deprecated in favor of portName. The TCP port to connect on
          # the backend. The default value is 80.
          # For internal passthrough Network Load Balancers and external passthrough
          # Network Load Balancers, omit port.
      "portName": "A String", # A named port on a backend instance group representing the port for
          # communication to the backend VMs in that group. The
          # named port must be [defined on each backend instance
          # group](https://cloud.google.com/load-balancing/docs/backend-service#named_ports).
          # This parameter has no meaning if the backends are NEGs. For internal
          # passthrough Network Load Balancers and external passthrough Network Load
          # Balancers, omit port_name.
      "protocol": "A String", # The protocol this BackendService uses to communicate
          # with backends.
          #
          # Possible values are HTTP, HTTPS, HTTP2, H2C, TCP, SSL, UDP or GRPC.
          # depending on the chosen load balancer or Traffic Director configuration.
          # Refer to the documentation for the load balancers or for Traffic Director
          # for more information.
          #
          # Must be set to GRPC when the backend service is referenced by a URL map
          # that is bound to target gRPC proxy.
      "region": "A String", # Output only. [Output Only] URL of the region where the regional backend service
          # resides. This field is not applicable to global backend services.
          # You must specify this field as part of the HTTP request URL. It is
          # not settable as a field in the request body.
      "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this
          # backend service.
      "securitySettings": { # The authentication and authorization settings for a BackendService. # This field specifies the security settings that apply to this backend
          # service. This field is applicable to a global backend service with the
          # load_balancing_scheme set to INTERNAL_SELF_MANAGED.
        "authentication": "A String", # [Deprecated] Use clientTlsPolicy instead.
        "awsV4Authentication": { # Contains the configurations necessary to generate a signature for access to # The configuration needed to generate a signature for access to private
            # storage buckets that support AWS's Signature Version 4 for authentication.
            # Allowed only for INTERNET_IP_PORT and INTERNET_FQDN_PORT NEG backends.
            # private storage buckets that support Signature Version 4 for authentication.
            # The service name for generating the authentication header will always default
            # to 's3'.
          "accessKey": "A String", # The access key used for s3 bucket authentication. Required for updating or
              # creating a backend that uses AWS v4 signature authentication, but will not
              # be returned as part of the configuration when queried with a REST API GET
              # request.
              #
              # @InputOnly
          "accessKeyId": "A String", # The identifier of an access key used for s3 bucket authentication.
          "accessKeyVersion": "A String", # The optional version identifier for the access key. You can use this to
              # keep track of different iterations of your access key.
          "originRegion": "A String", # The name of the cloud region of your origin. This is a free-form field with
              # the name of the region your cloud uses to host your origin.  For example,
              # "us-east-1" for AWS or "us-ashburn-1" for OCI.
        },
        "clientTlsPolicy": "A String", # Optional. A URL referring to a networksecurity.ClientTlsPolicy resource
            # that describes how clients should authenticate with this service's
            # backends.
            #
            #  clientTlsPolicy only applies to a globalBackendService with the loadBalancingScheme set
            # to INTERNAL_SELF_MANAGED.
            #
            #  If left blank, communications are not encrypted.
        "subjectAltNames": [ # Optional. A list of Subject Alternative Names (SANs) that the client
            # verifies during a mutual TLS handshake with an server/endpoint for thisBackendService. When the server presents its X.509 certificate
            # to the client, the client inspects the certificate'ssubjectAltName field. If the field contains one of the
            # specified values, the communication continues. Otherwise, it fails. This
            # additional check enables the client to verify that the server is authorized
            # to run the requested service.
            #
            #  Note that the contents of the server
            # certificate's subjectAltName field are configured by the
            # Public Key Infrastructure which provisions server identities.
            #
            #  Only applies to a global BackendService withloadBalancingScheme set to INTERNAL_SELF_MANAGED.
            # Only applies when BackendService has an attachedclientTlsPolicy with clientCertificate (mTLS
            # mode).
          "A String",
        ],
      },
      "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
      "serviceBindings": [ # URLs of networkservices.ServiceBinding resources.
          #
          # Can only be set if load balancing scheme is INTERNAL_SELF_MANAGED.
          # If set, lists of backends and health checks must be both empty.
        "A String",
      ],
      "serviceLbPolicy": "A String", # URL to networkservices.ServiceLbPolicy resource.
          #
          # Can only be set if load balancing scheme is EXTERNAL_MANAGED,
          # INTERNAL_MANAGED or INTERNAL_SELF_MANAGED and the scope is global.
      "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
          #
          # Only NONE and HEADER_FIELD are supported
          # when the backend service is referenced by a URL map that is bound to
          # target gRPC proxy that has validateForProxyless field set to true.
          #
          # For more details, see:
          # [Session
          # Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity).
          #
          # sessionAffinity cannot be specified with haPolicy.
      "strongSessionAffinityCookie": { # The HTTP cookie used for stateful session affinity. # Describes the HTTP cookie used for stateful session affinity. This field is
          # applicable and required if the sessionAffinity is set toSTRONG_COOKIE_AFFINITY.
        "name": "A String", # Name of the cookie.
        "path": "A String", # Path to set for the cookie.
        "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
      },
      "subsetting": { # Subsetting configuration for this BackendService. # subsetting cannot be specified with haPolicy.
          # Currently this is applicable only for Internal TCP/UDP load balancing,
          # Internal HTTP(S) load balancing and Traffic Director.
        "policy": "A String",
        "subsetSize": 42, # The number of backends per backend group assigned to each proxy instance or
            # each service mesh client.
            #
            # An input parameter to the `CONSISTENT_HASH_SUBSETTING` algorithm.
            # Can only be set if `policy` is set to `CONSISTENT_HASH_SUBSETTING`.
            # Can only be set if load balancing scheme is `INTERNAL_MANAGED` or
            # `INTERNAL_SELF_MANAGED`.
            #
            # `subset_size` is optional for Internal HTTP(S) load balancing
            # and required for Traffic Director.
            #
            # If you do not provide this value, Cloud Load Balancing will calculate it
            # dynamically to optimize the number of proxies/clients visible to each
            # backend and vice versa.
            #
            # Must be greater than 0. If `subset_size` is larger than the number of
            # backends/endpoints, then subsetting is disabled.
      },
      "timeoutSec": 42, # The backend service timeout has a different meaning depending on the
          # type of load balancer. For more information see,
          # Backend service settings.
          # The default is 30 seconds.
          # The full range of timeout values allowed goes from 1
          # through 2,147,483,647 seconds.
          #
          # This value can be overridden in the PathMatcher configuration of the
          # UrlMap that references this backend service.
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
          # Instead, use maxStreamDuration.
      "tlsSettings": { # Configuration for Backend Authenticated TLS and mTLS. May only be specified
          # when the backend protocol is SSL, HTTPS or HTTP2.
        "authenticationConfig": "A String", # Reference to the BackendAuthenticationConfig resource from the
            # networksecurity.googleapis.com namespace. Can be used in authenticating
            # TLS connections to the backend, as specified by the authenticationMode
            # field. Can only be specified if authenticationMode is not NONE.
        "identity": "A String", # Assigns the Managed Identity for the BackendService Workload.
            #
            #
            # Use this property to configure the load balancer back-end to use
            # certificates and roots of trust provisioned by the Managed Workload
            # Identity system.
            #
            #  The `identity` property is the
            # fully-specified SPIFFE ID to use in the SVID presented by the Load
            # Balancer Workload.
            #
            #  The SPIFFE ID must be a resource starting with the
            # `trustDomain` property value, followed by the path to the Managed
            # Workload Identity.
            #
            #  Supported SPIFFE ID format:
            #
            #    - //<trust_domain>/ns/<namespace>/sa/<subject>
            #
            #
            # The Trust Domain within the Managed Identity must refer to a valid
            # Workload Identity Pool. The TrustConfig and CertificateIssuanceConfig
            # will be inherited from the Workload Identity Pool.
            #
            #  Restrictions:
            #
            #    - If you set the `identity` property, you cannot manually set
            #    the following fields:
            #        - tlsSettings.sni
            #       - tlsSettings.subjectAltNames
            #       - tlsSettings.authenticationConfig
            #
            #
            # When defining a `identity` for a RegionBackendServices, the
            # corresponding Workload Identity Pool must have a ca_pool
            # configured in the same region.
            #
            #  The system will set up a read-onlytlsSettings.authenticationConfig for the Managed Identity.
        "sni": "A String", # Server Name Indication - see RFC3546 section 3.1. If set, the load
            # balancer sends this string as the SNI hostname in the TLS connection to
            # the backend, and requires that this string match a Subject Alternative
            # Name (SAN) in the backend's server certificate. With a Regional Internet
            # NEG backend, if the SNI is specified here, the load balancer uses it
            # regardless of whether the Regional Internet NEG is specified with FQDN or
            # IP address and port. When both sni and subjectAltNames[] are specified,
            # the load balancer matches the backend certificate's SAN only to
            # subjectAltNames[].
        "subjectAltNames": [ # A list of Subject Alternative Names (SANs) that the Load Balancer
            # verifies during a TLS handshake with the backend. When the server
            # presents its X.509 certificate to the Load Balancer, the Load Balancer
            # inspects the certificate's SAN field, and requires that at least one SAN
            # match one of the subjectAltNames in the list. This field is limited to 5
            # entries. When both sni and subjectAltNames[] are specified, the load
            # balancer matches the backend certificate's SAN only to subjectAltNames[].
          { # A Subject Alternative Name that the load balancer matches against the SAN
              # field in the TLS certificate provided by the backend, specified as either
              # a DNS name or a URI, in accordance with RFC 5280 4.2.1.6
            "dnsName": "A String", # The SAN specified as a DNS Name.
            "uniformResourceIdentifier": "A String", # The SAN specified as a URI.
          },
        ],
      },
      "usedBy": [ # Output only. [Output Only] List of resources referencing given backend service.
        {
          "reference": "A String", # Output only. [Output Only] Server-defined URL for resources referencing given
              # BackendService like UrlMaps, TargetTcpProxies, TargetSslProxies
              # and ForwardingRule.
        },
      ],
    }

`getHealth(project, region, backendService, body=None, x__xgafv=None)`

    Gets the most recent health check results for this
    regional BackendService.

    Args:
      project: string, A parameter (required)
      region: string, Name of the region scoping this request. (required)
      backendService: string, Name of the BackendService resource for which to get health. (required)
      body: object, The request body.
        The object takes the form of:

    {
      "group": "A String", # A URI referencing one of the instance groups or network endpoint groups
          # listed in the backend service.
    }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        {
      "annotations": { # Metadata defined as annotations on the network endpoint group.
        "a_key": "A String",
      },
      "healthStatus": [ # Health state of the backend instances or endpoints in requested instance or
          # network endpoint group, determined based on configured health checks.
        {
          "annotations": { # Metadata defined as annotations for network endpoint.
            "a_key": "A String",
          },
          "forwardingRule": "A String", # URL of the forwarding rule associated with the health status of the
              # instance.
          "forwardingRuleIp": "A String", # A forwarding rule IP address assigned to this instance.
          "healthState": "A String", # Health state of the IPv4 address of the instance.
          "instance": "A String", # URL of the instance resource.
          "ipAddress": "A String", # For target pool based Network Load Balancing, it indicates the forwarding
              # rule's IP address assigned to this instance. For other types of load
              # balancing, the field indicates VM internal ip.
          "ipv6Address": "A String",
          "ipv6HealthState": "A String", # Health state of the IPv6 address of the instance.
          "port": 42, # The named port of the instance group, not necessarily the port that is
              # health-checked.
          "weight": "A String",
          "weightError": "A String",
        },
      ],
      "kind": "compute#backendServiceGroupHealth", # Output only. [Output Only] Type of resource. Alwayscompute#backendServiceGroupHealth for the health of backend
          # services.
    }

`getIamPolicy(project, region, resource, optionsRequestedPolicyVersion=None, x__xgafv=None)`

    Gets the access control policy for a resource. May be empty if no such
    policy or resource exists.

    Args:
      project: string, Project ID for this request. (required)
      region: string, The name of the region for this request. (required)
      resource: string, Name or id of the resource for this request. (required)
      optionsRequestedPolicyVersion: integer, Requested IAM Policy version.
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # An Identity and Access Management (IAM) policy, which specifies access
        # controls for Google Cloud resources.
        #
        #
        # A `Policy` is a collection of `bindings`. A `binding` binds one or more
        # `members`, or principals, to a single `role`. Principals can be user
        # accounts, service accounts, Google groups, and domains (such as G Suite). A
        # `role` is a named list of permissions; each `role` can be an IAM predefined
        # role or a user-created custom role.
        #
        # For some types of Google Cloud resources, a `binding` can also specify a
        # `condition`, which is a logical expression that allows access to a resource
        # only if the expression evaluates to `true`. A condition can add constraints
        # based on attributes of the request, the resource, or both. To learn which
        # resources support conditions in their IAM policies, see the
        # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
        #
        # **JSON example:**
        #
        # ```
        #     {
        #       "bindings": [
        #         {
        #           "role": "roles/resourcemanager.organizationAdmin",
        #           "members": [
        #             "user:mike@example.com",
        #             "group:admins@example.com",
        #             "domain:google.com",
        #             "serviceAccount:my-project-id@appspot.gserviceaccount.com"
        #           ]
        #         },
        #         {
        #           "role": "roles/resourcemanager.organizationViewer",
        #           "members": [
        #             "user:eve@example.com"
        #           ],
        #           "condition": {
        #             "title": "expirable access",
        #             "description": "Does not grant access after Sep 2020",
        #             "expression": "request.time < timestamp('2020-10-01T00:00:00.000Z')",
        #           }
        #         }
        #       ],
        #       "etag": "BwWWja0YfJA=",
        #       "version": 3
        #     }
        # ```
        #
        # **YAML example:**
        #
        # ```
        #     bindings:
        #     - members:
        #       - user:mike@example.com
        #       - group:admins@example.com
        #       - domain:google.com
        #       - serviceAccount:my-project-id@appspot.gserviceaccount.com
        #       role: roles/resourcemanager.organizationAdmin
        #     - members:
        #       - user:eve@example.com
        #       role: roles/resourcemanager.organizationViewer
        #       condition:
        #         title: expirable access
        #         description: Does not grant access after Sep 2020
        #         expression: request.time < timestamp('2020-10-01T00:00:00.000Z')
        #     etag: BwWWja0YfJA=
        #     version: 3
        # ```
        #
        # For a description of IAM and its features, see the
        # [IAM documentation](https://cloud.google.com/iam/docs/).
      "auditConfigs": [ # Specifies cloud audit logging configuration for this policy.
        { # Specifies the audit configuration for a service.
            # The configuration determines which permission types are logged, and what
            # identities, if any, are exempted from logging.
            # An AuditConfig must have one or more AuditLogConfigs.
            #
            # If there are AuditConfigs for both `allServices` and a specific service,
            # the union of the two AuditConfigs is used for that service: the log_types
            # specified in each AuditConfig are enabled, and the exempted_members in each
            # AuditLogConfig are exempted.
            #
            # Example Policy with multiple AuditConfigs:
            #
            #     {
            #       "audit_configs": [
            #         {
            #           "service": "allServices",
            #           "audit_log_configs": [
            #             {
            #               "log_type": "DATA_READ",
            #               "exempted_members": [
            #                 "user:jose@example.com"
            #               ]
            #             },
            #             {
            #               "log_type": "DATA_WRITE"
            #             },
            #             {
            #               "log_type": "ADMIN_READ"
            #             }
            #           ]
            #         },
            #         {
            #           "service": "sampleservice.googleapis.com",
            #           "audit_log_configs": [
            #             {
            #               "log_type": "DATA_READ"
            #             },
            #             {
            #               "log_type": "DATA_WRITE",
            #               "exempted_members": [
            #                 "user:aliya@example.com"
            #               ]
            #             }
            #           ]
            #         }
            #       ]
            #     }
            #
            # For sampleservice, this policy enables DATA_READ, DATA_WRITE and ADMIN_READ
            # logging. It also exempts `jose@example.com` from DATA_READ logging, and
            # `aliya@example.com` from DATA_WRITE logging.
          "auditLogConfigs": [ # The configuration for logging of each type of permission.
            { # Provides the configuration for logging a type of permissions.
                # Example:
                #
                #     {
                #       "audit_log_configs": [
                #         {
                #           "log_type": "DATA_READ",
                #           "exempted_members": [
                #             "user:jose@example.com"
                #           ]
                #         },
                #         {
                #           "log_type": "DATA_WRITE"
                #         }
                #       ]
                #     }
                #
                # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting
                # jose@example.com from DATA_READ logging.
              "exemptedMembers": [ # Specifies the identities that do not cause logging for this type of
                  # permission.
                  # Follows the same format of Binding.members.
                "A String",
              ],
              "logType": "A String", # The log type that this config enables.
            },
          ],
          "service": "A String", # Specifies a service that will be enabled for audit logging.
              # For example, `storage.googleapis.com`, `cloudsql.googleapis.com`.
              # `allServices` is a special value that covers all services.
        },
      ],
      "bindings": [ # Associates a list of `members`, or principals, with a `role`. Optionally,
          # may specify a `condition` that determines how and when the `bindings` are
          # applied. Each of the `bindings` must contain at least one principal.
          #
          # The `bindings` in a `Policy` can refer to up to 1,500 principals; up to 250
          # of these principals can be Google groups. Each occurrence of a principal
          # counts towards these limits. For example, if the `bindings` grant 50
          # different roles to `user:alice@example.com`, and not to any other
          # principal, then you can add another 1,450 principals to the `bindings` in
          # the `Policy`.
        { # Associates `members`, or principals, with a `role`.
          "condition": { # Represents a textual expression in the Common Expression Language (CEL) # The condition that is associated with this binding.
              #
              # If the condition evaluates to `true`, then this binding applies to the
              # current request.
              #
              # If the condition evaluates to `false`, then this binding does not apply to
              # the current request. However, a different role binding might grant the same
              # role to one or more of the principals in this binding.
              #
              # To learn which resources support conditions in their IAM policies, see the
              # [IAM
              # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
              # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
              # are documented at https://github.com/google/cel-spec.
              #
              # Example (Comparison):
              #
              #     title: "Summary size limit"
              #     description: "Determines if a summary is less than 100 chars"
              #     expression: "document.summary.size() < 100"
              #
              # Example (Equality):
              #
              #     title: "Requestor is owner"
              #     description: "Determines if requestor is the document owner"
              #     expression: "document.owner == request.auth.claims.email"
              #
              # Example (Logic):
              #
              #     title: "Public documents"
              #     description: "Determine whether the document should be publicly visible"
              #     expression: "document.type != 'private' && document.type != 'internal'"
              #
              # Example (Data Manipulation):
              #
              #     title: "Notification string"
              #     description: "Create a notification string with a timestamp."
              #     expression: "'New message received at ' + string(document.create_time)"
              #
              # The exact variables and functions that may be referenced within an expression
              # are determined by the service that evaluates it. See the service
              # documentation for additional information.
            "description": "A String", # Optional. Description of the expression. This is a longer text which
                # describes the expression, e.g. when hovered over it in a UI.
            "expression": "A String", # Textual representation of an expression in Common Expression Language
                # syntax.
            "location": "A String", # Optional. String indicating the location of the expression for error
                # reporting, e.g. a file name and a position in the file.
            "title": "A String", # Optional. Title for the expression, i.e. a short string describing
                # its purpose. This can be used e.g. in UIs which allow to enter the
                # expression.
          },
          "members": [ # Specifies the principals requesting access for a Google Cloud resource.
              # `members` can have the following values:
              #
              # * `allUsers`: A special identifier that represents anyone who is
              #    on the internet; with or without a Google account.
              #
              # * `allAuthenticatedUsers`: A special identifier that represents anyone
              #    who is authenticated with a Google account or a service account.
              #    Does not include identities that come from external identity providers
              #    (IdPs) through identity federation.
              #
              # * `user:{emailid}`: An email address that represents a specific Google
              #    account. For example, `alice@example.com` .
              #
              #
              # * `serviceAccount:{emailid}`: An email address that represents a Google
              #    service account. For example,
              #    `my-other-app@appspot.gserviceaccount.com`.
              #
              # * `serviceAccount:{projectid}.svc.id.goog[{namespace}/{kubernetes-sa}]`: An
              #    identifier for a
              #    [Kubernetes service
              #    account](https://cloud.google.com/kubernetes-engine/docs/how-to/kubernetes-service-accounts).
              #    For example, `my-project.svc.id.goog[my-namespace/my-kubernetes-sa]`.
              #
              # * `group:{emailid}`: An email address that represents a Google group.
              #    For example, `admins@example.com`.
              #
              #
              # * `domain:{domain}`: The G Suite domain (primary) that represents all the
              #    users of that domain. For example, `google.com` or `example.com`.
              #
              #
              #
              #
              # * `principal://iam.googleapis.com/locations/global/workforcePools/{pool_id}/subject/{subject_attribute_value}`:
              #   A single identity in a workforce identity pool.
              #
              # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/group/{group_id}`:
              #   All workforce identities in a group.
              #
              # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/attribute.{attribute_name}/{attribute_value}`:
              #   All workforce identities with a specific attribute value.
              #
              # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/*`:
              #   All identities in a workforce identity pool.
              #
              # * `principal://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/subject/{subject_attribute_value}`:
              #   A single identity in a workload identity pool.
              #
              # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/group/{group_id}`:
              #   A workload identity pool group.
              #
              # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/attribute.{attribute_name}/{attribute_value}`:
              #   All identities in a workload identity pool with a certain attribute.
              #
              # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/*`:
              #   All identities in a workload identity pool.
              #
              # * `deleted:user:{emailid}?uid={uniqueid}`: An email address (plus unique
              #    identifier) representing a user that has been recently deleted. For
              #    example, `alice@example.com?uid=123456789012345678901`. If the user is
              #    recovered, this value reverts to `user:{emailid}` and the recovered user
              #    retains the role in the binding.
              #
              # * `deleted:serviceAccount:{emailid}?uid={uniqueid}`: An email address (plus
              #    unique identifier) representing a service account that has been recently
              #    deleted. For example,
              #    `my-other-app@appspot.gserviceaccount.com?uid=123456789012345678901`.
              #    If the service account is undeleted, this value reverts to
              #    `serviceAccount:{emailid}` and the undeleted service account retains the
              #    role in the binding.
              #
              # * `deleted:group:{emailid}?uid={uniqueid}`: An email address (plus unique
              #    identifier) representing a Google group that has been recently
              #    deleted. For example, `admins@example.com?uid=123456789012345678901`. If
              #    the group is recovered, this value reverts to `group:{emailid}` and the
              #    recovered group retains the role in the binding.
              #
              # * `deleted:principal://iam.googleapis.com/locations/global/workforcePools/{pool_id}/subject/{subject_attribute_value}`:
              #   Deleted single identity in a workforce identity pool. For example,
              #   `deleted:principal://iam.googleapis.com/locations/global/workforcePools/my-pool-id/subject/my-subject-attribute-value`.
            "A String",
          ],
          "role": "A String", # Role that is assigned to the list of `members`, or principals.
              # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
              #
              # For an overview of the IAM roles and permissions, see the
              # [IAM documentation](https://cloud.google.com/iam/docs/roles-overview). For
              # a list of the available pre-defined roles, see
              # [here](https://cloud.google.com/iam/docs/understanding-roles).
        },
      ],
      "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
          # prevent simultaneous updates of a policy from overwriting each other.
          # It is strongly suggested that systems make use of the `etag` in the
          # read-modify-write cycle to perform policy updates in order to avoid race
          # conditions: An `etag` is returned in the response to `getIamPolicy`, and
          # systems are expected to put that etag in the request to `setIamPolicy` to
          # ensure that their change will be applied to the same version of the policy.
          #
          # **Important:** If you use IAM Conditions, you must include the `etag` field
          # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
          # you to overwrite a version `3` policy with a version `1` policy, and all of
          # the conditions in the version `3` policy are lost.
      "version": 42, # Specifies the format of the policy.
          #
          # Valid values are `0`, `1`, and `3`. Requests that specify an invalid value
          # are rejected.
          #
          # Any operation that affects conditional role bindings must specify version
          # `3`. This requirement applies to the following operations:
          #
          # * Getting a policy that includes a conditional role binding
          # * Adding a conditional role binding to a policy
          # * Changing a conditional role binding in a policy
          # * Removing any role binding, with or without a condition, from a policy
          #   that includes conditions
          #
          # **Important:** If you use IAM Conditions, you must include the `etag` field
          # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
          # you to overwrite a version `3` policy with a version `1` policy, and all of
          # the conditions in the version `3` policy are lost.
          #
          # If a policy does not include any conditions, operations on that policy may
          # specify any valid version or leave the field unset.
          #
          # To learn which resources support conditions in their IAM policies, see the
          # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
    }

`insert(project, region, body=None, requestId=None, x__xgafv=None)`

    Creates a regional BackendService resource in the specified project using
    the data included in the request. For more information, see
    Backend services overview.

    Args:
      project: string, Project ID for this request. (required)
      region: string, Name of the region scoping this request. (required)
      body: object, The request body.
        The object takes the form of:

    { # Represents a Backend Service resource.
        #
        # A backend service defines how Google Cloud load balancers distribute traffic.
        # The backend service configuration contains a set of values, such as the
        # protocol used to connect to backends, various distribution and session
        # settings, health checks, and timeouts. These settings provide fine-grained
        # control over how your load balancer behaves. Most of the settings have
        # default values that allow for easy configuration if you need to get started
        # quickly.
        #
        # Backend services in Google Compute Engine can be either regionally or
        # globally scoped.
        #
        # * [Global](https://cloud.google.com/compute/docs/reference/rest/beta/backendServices)
        # * [Regional](https://cloud.google.com/compute/docs/reference/rest/beta/regionBackendServices)
        #
        # For more information, seeBackend
        # Services.
      "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds. This setting is applicable to Application
          # Load Balancers and Traffic Director and requires
          # GENERATED_COOKIE or HTTP_COOKIE session affinity.
          #
          # If set to 0, the cookie is non-persistent and lasts only until
          # the end of the browser session (or equivalent). The maximum allowed value
          # is two weeks (1,209,600).
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
      "backends": [ # The list of backends that serve this BackendService.
        { # Message containing information of one individual backend.
          "balancingMode": "A String", # Specifies how to determine whether the backend of a load balancer can
              # handle additional traffic or is fully loaded. For usage guidelines, see
              # Connection balancing mode.
              #
              # Backends must use compatible balancing modes. For more information, see
              # Supported balancing modes and target capacity settings and
              # Restrictions and guidance for instance groups.
              #
              # Note: Currently, if you use the API to configure incompatible balancing
              # modes, the configuration might be accepted even though it has no impact
              # and is ignored. Specifically, Backend.maxUtilization is ignored when
              # Backend.balancingMode is RATE. In the future, this incompatible combination
              # will be rejected.
          "capacityScaler": 3.14, # A multiplier applied to the backend's target capacity of its balancing
              # mode.
              # The default value is 1, which means the group serves up to
              # 100% of its configured capacity (depending onbalancingMode). A setting of 0 means the group is
              # completely drained, offering 0% of its available capacity. The valid ranges
              # are 0.0 and [0.1,1.0].
              # You cannot configure a setting larger than 0 and smaller than0.1.
              # You cannot configure a setting of 0 when there is only one
              # backend attached to the backend service.
              #
              # Not available with backends that don't support using abalancingMode. This includes backends such as global
              # internet NEGs, regional serverless NEGs, and PSC NEGs.
          "customMetrics": [ # List of custom metrics that are used for CUSTOM_METRICS
              # BalancingMode.
            { # Custom Metrics are used for CUSTOM_METRICS balancing_mode.
              "dryRun": True or False, # If true, the metric data is collected and reported to Cloud
                  # Monitoring, but is not used for load balancing.
              "maxUtilization": 3.14, # Optional parameter to define a target utilization for the Custom Metrics
                  # balancing mode. The valid range is [0.0, 1.0].
              "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
                  # long and match the regular expression
                  # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
                  # first character must be a lowercase letter, and all following
                  # characters must be a dash, period, underscore, lowercase letter, or
                  # digit, except the last character, which cannot be a dash, period, or
                  # underscore. For usage guidelines, see Custom Metrics balancing mode. This
                  # field can only be used for a global or regional backend service with the
                  # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
            },
          ],
          "description": "A String", # An optional description of this resource. Provide this property when you
              # create the resource.
          "failover": True or False, # This field designates whether this is a failover backend. More than one
              # failover backend can be configured for a given BackendService.
          "group": "A String", # The fully-qualified URL of aninstance
              # group or network endpoint
              # group (NEG) resource. To determine what types of backends a load
              # balancer supports, see the [Backend services
              # overview](https://cloud.google.com/load-balancing/docs/backend-service#backends).
              #
              # You must use the *fully-qualified* URL (starting withhttps://www.googleapis.com/) to specify the instance group
              # or NEG. Partial URLs are not supported.
              #
              # If haPolicy is specified, backends must refer to NEG resources of type
              # GCE_VM_IP.
          "maxConnections": 42, # Defines a target maximum number of simultaneous connections. For usage
              # guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode. Not available if the backend'sbalancingMode is RATE.
          "maxConnectionsPerEndpoint": 42, # Defines a target maximum number of simultaneous connections.  For usage
              # guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isRATE.
          "maxConnectionsPerInstance": 42, # Defines a target maximum number of simultaneous connections.
              # For usage guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isRATE.
          "maxInFlightRequests": 42, # Defines a maximum number of in-flight requests for the whole NEG or
              # instance group. Not available if backend's balancingMode isRATE or CONNECTION.
          "maxInFlightRequestsPerEndpoint": 42, # Defines a maximum number of in-flight requests for a single endpoint.
              # Not available if backend's balancingMode is RATE
              # or CONNECTION.
          "maxInFlightRequestsPerInstance": 42, # Defines a maximum number of in-flight requests for a single VM.
              # Not available if backend's balancingMode is RATE
              # or CONNECTION.
          "maxRate": 42, # Defines a maximum number of HTTP requests per second (RPS). For
              # usage guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxRatePerEndpoint": 3.14, # Defines a maximum target for requests per second (RPS). For usage
              # guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxRatePerInstance": 3.14, # Defines a maximum target for requests per second (RPS). For usage
              # guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxUtilization": 3.14, # Optional parameter to define a target capacity for theUTILIZATION balancing mode. The valid range is[0.0, 1.0].
              #
              # For usage guidelines, seeUtilization
              # balancing mode.
          "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend.
              # the backend.
            "resourceUri": "A String", # The URI of the resource or system that manages the backend.
          },
          "preference": "A String", # This field indicates whether this backend should be fully utilized before
              # sending traffic to backends with default preference. The possible values
              # are:
              #
              #    - PREFERRED: Backends with this preference level will be
              #    filled up to their capacity limits first, based on RTT.
              #    - DEFAULT:  If preferred backends don't have enough
              #    capacity, backends in this layer would be used and traffic would be
              #    assigned based on the load balancing algorithm you use. This is the
              #    default
          "service": "A String", # Represents a service backend (e.g., Cloud Run service, PSC Service
              # Attachment).
              # e.g.
              #  "run.googleapis.com/projects/123456789/locations/us-central1/services/my-service"
              #  for Cloud Run service.
              #  "compute.googleapis.com/projects/123456789/regions/us-central1/serviceAttachments/my-service-attachment"
              #  for PSC Service Attachment.
          "trafficDuration": "A String",
        },
      ],
      "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService. Only available for
          # specified load balancer types.
        "bypassCacheOnRequestHeaders": [ # Bypass the cache when the specified request headers are matched - e.g.
            # Pragma or Authorization headers. Up to 5 headers can be specified.
            # The cache is bypassed for all cdnPolicy.cacheMode settings.
          { # Bypass the cache when the specified request headers are present,
              # e.g. Pragma or Authorization headers. Values are case insensitive.
              # The presence of such a header overrides the cache_mode setting.
            "headerName": "A String", # The header field name to match on when bypassing cache.
                # Values are case-insensitive.
          },
        ],
        "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud # The CacheKeyPolicy for this CdnPolicy.
            # CDN.
          "includeHost": True or False, # If true, requests to different hosts will be cached separately.
          "includeHttpHeaders": [ # Allows HTTP request headers (by name) to be used in the cache key.
            "A String",
          ],
          "includeNamedCookies": [ # Allows HTTP cookies (by name) to be used in the cache key.
              # The name=value pair will be used in the cache key Cloud CDN generates.
            "A String",
          ],
          "includeProtocol": True or False, # If true, http and https requests will be cached separately.
          "includeQueryString": True or False, # If true, include query string parameters in the cache key according to
              # query_string_whitelist and query_string_blacklist. If neither is set, the
              # entire query string will be included. If false, the query string will be
              # excluded from the cache key entirely.
          "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other
              # parameters will be included. Either specify query_string_whitelist or
              # query_string_blacklist, not both. '&' and '=' will be percent encoded and
              # not treated as delimiters.
            "A String",
          ],
          "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other
              # parameters will be excluded. Either specify query_string_whitelist or
              # query_string_blacklist, not both. '&' and '=' will be percent encoded and
              # not treated as delimiters.
            "A String",
          ],
        },
        "cacheMode": "A String", # Specifies the cache setting for all responses from this backend.
            # The possible values are:USE_ORIGIN_HEADERS Requires the origin to set valid caching
            # headers to cache content. Responses without these headers will not be
            # cached at Google's edge, and will require a full trip to the origin on
            # every request, potentially impacting performance and increasing load on
            # the origin server.FORCE_CACHE_ALL Cache all content, ignoring any "private",
            # "no-store" or "no-cache" directives in Cache-Control response headers.
            # Warning: this may result in Cloud CDN caching private,
            # per-user (user identifiable) content.CACHE_ALL_STATIC Automatically cache static content,
            # including common image formats, media (video and audio), and web assets
            # (JavaScript and CSS). Requests and responses that are marked as
            # uncacheable, as well as dynamic content (including HTML), will not be
            # cached.
            #
            # If no value is provided for cdnPolicy.cacheMode, it defaults
            # to CACHE_ALL_STATIC.
        "clientTtl": 42, # Specifies a separate client (e.g. browser client) maximum TTL. This is
            # used to clamp the max-age (or Expires) value sent to the client.  With
            # FORCE_CACHE_ALL, the lesser of client_ttl and default_ttl is used for the
            # response max-age directive, along with a "public" directive.  For
            # cacheable content in CACHE_ALL_STATIC mode, client_ttl clamps the max-age
            # from the origin (if specified), or else sets the response max-age
            # directive to the lesser of the client_ttl and default_ttl, and also
            # ensures a "public" cache-control directive is present.
            # If a client TTL is not specified, a default value (1 hour) will be used.
            # The maximum allowed value is 31,622,400s (1 year).
        "defaultTtl": 42, # Specifies the default TTL for cached content served by this origin for
            # responses that do not have an existing valid TTL (max-age or s-maxage).
            # Setting a TTL of "0" means "always revalidate".
            # The value of defaultTTL cannot be set to a value greater than that of
            # maxTTL, but can be equal.
            # When the cacheMode is set to FORCE_CACHE_ALL, the defaultTTL
            # will overwrite the TTL set in all responses. The maximum allowed value is
            # 31,622,400s (1 year), noting that infrequently accessed objects may be
            # evicted from the cache before the defined TTL.
        "maxTtl": 42, # Specifies the maximum allowed TTL for cached content served by this
            # origin.
            # Cache directives that attempt to set a max-age or s-maxage higher than
            # this, or an Expires header more than maxTTL seconds in the future will
            # be capped at the value of maxTTL, as if it were the value of an
            # s-maxage Cache-Control directive.
            # Headers sent to the client will not be modified.
            # Setting a TTL of "0" means "always revalidate".
            # The maximum allowed value is 31,622,400s (1 year), noting that
            # infrequently accessed objects may be evicted from the cache before
            # the defined TTL.
        "negativeCaching": True or False, # Negative caching allows per-status code TTLs to be set, in order
            # to apply fine-grained caching for common errors or redirects.
            # This can reduce the load on your origin and improve end-user
            # experience by reducing response latency.
            # When the cache mode is set to CACHE_ALL_STATIC or USE_ORIGIN_HEADERS,
            # negative caching applies to responses with the specified response code
            # that lack any Cache-Control, Expires, or Pragma: no-cache directives.
            # When the cache mode is set to FORCE_CACHE_ALL, negative caching applies
            # to all responses with the specified response code, and override any
            # caching headers.
            # By default, Cloud CDN will apply the following default TTLs to these
            # status codes:
            # HTTP 300 (Multiple Choice), 301, 308 (Permanent Redirects): 10m
            # HTTP 404 (Not Found), 410 (Gone),
            # 451 (Unavailable For Legal Reasons): 120s
            # HTTP 405 (Method Not Found), 501 (Not Implemented): 60s.
            # These defaults can be overridden in negative_caching_policy.
        "negativeCachingPolicy": [ # Sets a cache TTL for the specified HTTP status code.
            # negative_caching must be enabled to configure negative_caching_policy.
            # Omitting the policy and leaving negative_caching enabled will use
            # Cloud CDN's default cache TTLs.
            # Note that when specifying an explicit negative_caching_policy, you
            # should take care to specify a cache TTL for all response codes
            # that you wish to cache. Cloud CDN will not apply any default
            # negative caching when a policy exists.
          { # Specify CDN TTLs for response error codes.
            "code": 42, # The HTTP status code to define a TTL against. Only HTTP status codes
                # 300, 301, 302, 307, 308, 404, 405, 410, 421, 451 and 501 can be
                # specified as values, and you cannot specify a status code more than
                # once.
            "ttl": 42, # The TTL (in seconds) for which to cache responses with the
                # corresponding status code.
                # The maximum allowed value is 1800s (30 minutes), noting that
                # infrequently accessed objects may be evicted from the cache before the
                # defined TTL.
          },
        ],
        "requestCoalescing": True or False, # If true then Cloud CDN will combine multiple concurrent cache fill
            # requests into a small number of requests to the origin.
        "serveWhileStale": 42, # Serve existing content from the cache (if available) when revalidating
            # content with the origin, or when an error is encountered when refreshing
            # the cache.
            # This setting defines the default "max-stale" duration for any cached
            # responses that do not specify a max-stale directive. Stale responses that
            # exceed the TTL configured here will not be served. The default limit
            # (max-stale) is 86400s (1 day), which will allow stale content to be
            # served up to this limit beyond the max-age (or s-maxage) of a cached
            # response.
            # The maximum allowed value is 604800 (1 week).
            # Set this to zero (0) to disable serve-while-stale.
        "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be
            # considered fresh. After this time period, the response will be
            # revalidated before being served. Defaults to 1hr (3600s).  When serving
            # responses to signed URL requests, Cloud CDN will internally behave as
            # though all responses from this backend had a "Cache-Control:
            # public, max-age=[TTL]" header, regardless of any existing
            # Cache-Control header. The actual headers served in responses will not be
            # altered.
        "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
          "A String",
        ],
      },
      "circuitBreakers": { # Settings controlling the volume of requests, connections and retries to this
          # backend service.
        "connectTimeout": { # A Duration represents a fixed-length span of time represented # The timeout for new network connections to hosts.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "maxConnections": 42, # The maximum number of connections to the backend service. If not specified,
            # there is no limit.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxPendingRequests": 42, # The maximum number of pending requests allowed to the backend service. If
            # not specified, there is no limit.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxRequests": 42, # The maximum number of parallel requests that allowed to the backend
            # service. If not specified, there is no limit.
        "maxRequestsPerConnection": 42, # Maximum requests for a single connection to the backend service.
            # This parameter is respected by both the HTTP/1.1 and HTTP/2
            # implementations. If not specified, there is no limit. Setting this
            # parameter to 1 will effectively disable keep alive.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxRetries": 42, # The maximum number of parallel retries allowed to the backend cluster. If
            # not specified, the default is 1.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
      },
      "compressionMode": "A String", # Compress text responses using Brotli or gzip compression, based on
          # the client's Accept-Encoding header.
      "connectionDraining": { # Message containing connection draining configuration. # connectionDraining cannot be specified with haPolicy.
        "drainingTimeoutSec": 42, # Configures a duration timeout for existing requests on a removed backend
            # instance. For supported load balancers and protocols, as described inEnabling
            # connection draining.
      },
      "connectionTrackingPolicy": { # Connection Tracking configuration for this BackendService. # Connection Tracking configuration for this BackendService. Connection
          # tracking policy settings are only available for external passthrough
          # Network Load Balancers and internal passthrough Network Load Balancers.
          #
          # connectionTrackingPolicy cannot be specified with haPolicy.
        "connectionPersistenceOnUnhealthyBackends": "A String", # Specifies connection persistence when backends are unhealthy. The default
            # value is DEFAULT_FOR_PROTOCOL.
            #
            # If set to DEFAULT_FOR_PROTOCOL, the existing connections
            # persist on unhealthy backends only for connection-oriented protocols
            # (TCP and SCTP) and only if the Tracking Mode isPER_CONNECTION (default tracking mode) or the Session
            # Affinity is configured for 5-tuple. They do not persist forUDP.
            #
            # If set to NEVER_PERSIST, after a backend becomes unhealthy,
            # the existing connections on the unhealthy backend are never persisted on
            # the unhealthy backend. They are always diverted to newly selected healthy
            # backends (unless all backends are unhealthy).
            #
            # If set to ALWAYS_PERSIST, existing connections always
            # persist on unhealthy backends regardless of protocol and session
            # affinity. It is generally not recommended to use this mode overriding the
            # default.
            #
            # For more details, see [Connection Persistence for Network Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#connection-persistence)
            # and [Connection Persistence for Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal#connection-persistence).
        "enableStrongAffinity": True or False, # Enable Strong Session Affinity for external passthrough Network Load
            # Balancers. This option is not available publicly.
        "idleTimeoutSec": 42, # Specifies how long to keep a Connection Tracking entry while there is no
            # matching traffic (in seconds).
            #
            # For internal passthrough Network Load Balancers:
            #
            #    - The minimum (default) is 10 minutes and the maximum is 16 hours.
            #    - It can be set only if Connection Tracking is less than 5-tuple
            #    (i.e. Session Affinity is CLIENT_IP_NO_DESTINATION,CLIENT_IP or CLIENT_IP_PROTO, and Tracking
            #    Mode is PER_SESSION).
            #
            #
            #
            # For external passthrough Network Load Balancers the default is 60
            # seconds. This option is not available publicly.
        "trackingMode": "A String", # Specifies the key used for connection tracking. There are two
            # options:
            #
            #    - PER_CONNECTION: This is the default mode. The Connection
            #    Tracking is performed as per the Connection Key (default Hash Method) for
            #    the specific protocol.
            #    - PER_SESSION: The Connection Tracking is performed as per
            #    the configured Session Affinity. It matches the configured Session
            #    Affinity.
            #
            #
            #
            # For more details, see [Tracking Mode for Network Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#tracking-mode)
            # and [Tracking Mode for Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal#tracking-mode).
      },
      "consistentHash": { # This message defines settings for a consistent hash style load balancer. # Consistent Hash-based load balancing can be used to provide soft session
          # affinity based on HTTP headers, cookies or other properties. This load
          # balancing policy is applicable only for HTTP connections. The affinity to a
          # particular destination host will be lost when one or more hosts are
          # added/removed from the destination service. This field specifies parameters
          # that control consistent hashing. This field is only applicable whenlocalityLbPolicy is set to MAGLEV orRING_HASH.
          #
          # This field is applicable to either:
          #
          #    - A regional backend service with the service protocol set to HTTP,
          #    HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
          #    INTERNAL_MANAGED.
          #    - A global backend service with the
          #    load_balancing_scheme set to INTERNAL_SELF_MANAGED.
        "httpCookie": { # The information about the HTTP Cookie on which the hash function is based # Hash is based on HTTP Cookie. This field describes a HTTP cookie that will
            # be used as the hash key for the consistent hash load balancer. If the
            # cookie is not present, it will be generated. This field is applicable if
            # the sessionAffinity is set to HTTP_COOKIE.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
            # for load balancing policies that use a consistent hash.
          "name": "A String", # Name of the cookie.
          "path": "A String", # Path to set for the cookie.
          "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
              # as a count of seconds and fractions of seconds at nanosecond
              # resolution. It is independent of any calendar and concepts like "day"
              # or "month". Range is approximately 10,000 years.
            "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                # Durations less than one second are represented with a 0
                # `seconds` field and a positive `nanos` field. Must be from 0
                # to 999,999,999 inclusive.
            "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
          },
        },
        "httpHeaderName": "A String", # The hash based on the value of the specified header field. This field is
            # applicable if the sessionAffinity is set toHEADER_FIELD.
        "minimumRingSize": "A String", # The minimum number of virtual nodes to use for the hash ring. Defaults to
            # 1024. Larger ring sizes result in more granular load distributions. If the
            # number of hosts in the load balancing pool is larger than the ring size,
            # each host will be assigned a single virtual node.
      },
      "creationTimestamp": "A String", # Output only. [Output Only] Creation timestamp inRFC3339
          # text format.
      "customMetrics": [ # List of custom metrics that are used for theWEIGHTED_ROUND_ROBIN locality_lb_policy.
        { # Custom Metrics are used for WEIGHTED_ROUND_ROBIN
            # locality_lb_policy.
          "dryRun": True or False, # If true, the metric data is not used for load balancing.
          "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
              # long and match the regular expression
              # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
              # first character must be a lowercase letter, and all following
              # characters must be a dash, period, underscore, lowercase letter, or
              # digit, except the last character, which cannot be a dash, period, or
              # underscore. For usage guidelines, see Custom Metrics balancing mode. This
              # field can only be used for a global or regional backend service with the
              # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
        },
      ],
      "customRequestHeaders": [ # Headers that the load balancer adds to proxied requests. See [Creating
          # custom
          # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
        "A String",
      ],
      "customResponseHeaders": [ # Headers that the load balancer adds to proxied responses. See [Creating
          # custom
          # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
        "A String",
      ],
      "description": "A String", # An optional description of this resource. Provide this property when you
          # create the resource.
      "dynamicForwarding": { # Defines a dynamic forwarding configuration for the backend service. # Dynamic forwarding configuration. This field is used to configure the
          # backend service with dynamic forwarding feature which together with Service
          # Extension allows customized and complex routing logic.
        "forwardProxy": { # Defines Dynamic Forwarding Proxy configuration. # Dynamic Forwarding Proxy configuration.
          "enabled": True or False, # A boolean flag enabling dynamic forwarding proxy.
          "proxyMode": "A String", # Determines the dynamic forwarding proxy mode.
        },
        "ipPortSelection": { # Defines a IP:PORT based dynamic forwarding configuration for the backend # IP:PORT based dynamic forwarding configuration.
            # service. Some ranges are restricted: Restricted
            # ranges.
          "enabled": True or False, # A boolean flag enabling IP:PORT based dynamic forwarding.
        },
      },
      "edgeSecurityPolicy": "A String", # [Output Only] The resource URL for the edge security policy associated with
          # this backend service.
      "enableCDN": True or False, # If true, enables Cloud CDN for the backend service of a
          # global external Application Load Balancer.
      "externalManagedMigrationState": "A String", # Specifies the canary migration state. Possible values are PREPARE,
          # TEST_BY_PERCENTAGE, and TEST_ALL_TRAFFIC.
          #
          # To begin the migration from EXTERNAL to EXTERNAL_MANAGED, the state must be
          # changed to PREPARE. The state must be changed to TEST_ALL_TRAFFIC before
          # the loadBalancingScheme can be changed to EXTERNAL_MANAGED. Optionally, the
          # TEST_BY_PERCENTAGE state can be used to migrate traffic by percentage using
          # externalManagedMigrationTestingPercentage.
          #
          # Rolling back a migration requires the states to be set in reverse order. So
          # changing the scheme from EXTERNAL_MANAGED to EXTERNAL requires the state to
          # be set to TEST_ALL_TRAFFIC at the same time. Optionally, the
          # TEST_BY_PERCENTAGE state can be used to migrate some traffic back to
          # EXTERNAL or PREPARE can be used to migrate all traffic back to EXTERNAL.
      "externalManagedMigrationTestingPercentage": 3.14, # Determines the fraction of requests that should be processed by the Global
          # external Application Load Balancer.
          #
          # The value of this field must be in the range [0, 100].
          #
          # Session affinity options will slightly affect this routing behavior, for
          # more details, see:Session
          # Affinity.
          #
          # This value can only be set if the loadBalancingScheme in the BackendService
          # is set to EXTERNAL (when using the classic Application Load Balancer) and
          # the migration state is TEST_BY_PERCENTAGE.
      "failoverPolicy": { # For load balancers that have configurable # Requires at least one backend instance group to be defined
          # as a backup (failover) backend.
          # For load balancers that have configurable failover:
          # [Internal passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
          # and [external passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
          #
          # failoverPolicy cannot be specified with haPolicy.
          # failover:
          # [Internal passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
          # and [external passthrough
          # Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
          # On failover or failback, this field indicates whether connection draining
          # will be honored. Google Cloud has a fixed connection draining timeout of
          # 10 minutes. A setting of true terminates existing TCP
          # connections to the active pool during failover and failback, immediately
          # draining traffic. A setting of false allows existing TCP
          # connections to persist, even on VMs no longer in the active pool, for up
          # to the duration of the connection draining timeout (10 minutes).
        "disableConnectionDrainOnFailover": True or False, # This can be set to true if the protocol isTCP, UDP, or UNSPECIFIED.
            #
            # The default is false.
        "dropTrafficIfUnhealthy": True or False, # If set to true, connections to the
            # load balancer are dropped when all primary and all backup backend VMs are
            # unhealthy.If set to false, connections are distributed
            # among all primary VMs when all primary and all backup backend VMs are
            #  unhealthy.
            # For load balancers that have configurable
            # failover:
            # [Internal passthrough
            # Network Load
            # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
            # and [external passthrough
            # Network Load
            # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
            # The default is false.
        "failoverRatio": 3.14, # The value of the field must be in the range[0, 1]. If the value is 0, the load balancer performs a
            # failover when the number of healthy primary VMs equals zero.
            # For all other values, the load balancer performs a failover when the
            # total number of healthy primary VMs is less than this ratio.
            # For load balancers that have configurable
            # failover:
            # [Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
            # and [external TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
      },
      "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object.
          # This field is used in optimistic locking. This field will be ignored when
          # inserting a BackendService. An up-to-date fingerprint must be provided in
          # order to update the BackendService, otherwise the request will
          # fail with error 412 conditionNotMet.
          #
          # To see the latest fingerprint, make a get() request to
          # retrieve a BackendService.
      "haPolicy": { # Configures self-managed High Availability (HA) for External and Internal
          # Protocol Forwarding.
          #
          # The backends of this regional backend service must only specify zonal
          # network endpoint groups (NEGs) of type GCE_VM_IP.
          #
          # When haPolicy is set for an Internal Passthrough Network Load Balancer, the
          # regional backend service must set the network field. All zonal NEGs must
          # belong to the same network. However, individual NEGs can
          # belong to different subnetworks of that network.
          #
          # When haPolicy is specified, the set of attached network endpoints across
          # all backends comprise an High Availability domain from which one endpoint
          # is selected as the active endpoint (the leader) that receives all
          # traffic.
          #
          # haPolicy can be added only at backend service creation time. Once set up,
          # it cannot be deleted.
          #
          # Note that haPolicy is not for load balancing, and therefore cannot be
          # specified with sessionAffinity, connectionTrackingPolicy, and
          # failoverPolicy.
          #
          # haPolicy requires customers to be responsible for tracking backend
          # endpoint health and electing a leader among the healthy endpoints.
          # Therefore, haPolicy cannot be specified with healthChecks.
          #
          # haPolicy can only be specified for External Passthrough Network Load
          # Balancers and Internal Passthrough Network Load Balancers.
        "fastIPMove": "A String", # Specifies whether fast IP move is enabled, and if so, the mechanism to
            # achieve it.
            #
            # Supported values are:
            #
            #    - DISABLED: Fast IP Move is disabled. You can only use the
            #    haPolicy.leader API to update the leader.
            #    - >GARP_RA: Provides a method to very quickly define a new network
            #    endpoint as the leader. This method is faster than updating the leader
            #    using the haPolicy.leader API. Fast IP move works as follows: The VM
            #    hosting the network endpoint that should become the new leader sends
            #    either a Gratuitous ARP (GARP) packet (IPv4) or an ICMPv6 Router
            #    Advertisement(RA) packet (IPv6).  Google Cloud immediately but
            #    temporarily associates the forwarding rule IP address with that VM, and
            #    both new and in-flight packets are quickly delivered to that VM.
            #
            #
            #
            # Note the important properties of the Fast IP Move functionality:
            #
            #    - The GARP/RA-initiated re-routing stays active for approximately 20
            #    minutes. After triggering fast failover, you must also
            #    appropriately set the haPolicy.leader.
            #    -  The new leader instance should continue to send GARP/RA packets
            #    periodically every 10 seconds until at least 10 minutes after updating
            #    the haPolicy.leader (but stop immediately if it is no longer the leader).
            #    - After triggering a fast failover, we recommend that you wait at least
            #    3 seconds before sending another GARP/RA packet from a different VM
            #    instance to avoid race conditions.
            #    - Don't send GARP/RA packets from different VM
            #    instances at the same time. If multiple instances continue to send
            #    GARP/RA packets, traffic might be routed to different destinations in an
            #    alternating order. This condition ceases when a single instance
            #    issues a GARP/RA packet.
            #    - The GARP/RA request always takes priority over the leader API.
            #    Using the haPolicy.leader API to change the leader to a different
            #    instance will have no effect until the GARP/RA request becomes
            #    inactive.
            #    - The GARP/RA packets should follow the GARP/RA
            #    Packet Specifications..
            #    -  When multiple forwarding rules refer to a regional backend service,
            #    you need only send a GARP or RA packet for a single forwarding rule
            #    virtual IP. The virtual IPs for all forwarding rules targeting the same
            #    backend service will also be moved to the sender of the GARP or RA
            #    packet.
            #
            #
            #
            # The following are the Fast IP Move limitations (that is, when fastIPMove
            # is not DISABLED):
            #
            #    - Multiple forwarding rules cannot use the same IP address if one of
            #    them refers to a regional backend service with fastIPMove.
            #    - The regional backend service must set the network field, and all
            #    NEGs must belong to that network. However, individual
            #    NEGs can belong to different subnetworks of that network.
            #    - The maximum number of network endpoints across all backends of a
            #    backend service with fastIPMove is 32.
            #    - The maximum number of backend services with fastIPMove that can have
            #    the same network endpoint attached to one of its backends is 64.
            #    - The maximum number of backend services with fastIPMove in a VPC in a
            #    region is 64.
            #    - The network endpoints that are attached to a backend of a backend
            #    service with fastIPMove cannot resolve to Gen3+ machines for IPv6.
            #    - Traffic directed to the leader by a static route next hop will not be
            #    redirected to a new leader by fast failover. Such traffic will only be
            #    redirected once an haPolicy.leader update has taken effect. Only traffic
            #    to the forwarding rule's virtual IP will be redirected to a new leader by
            #    fast failover.
            #
            #
            # haPolicy.fastIPMove can be set only at backend service creation time.
            # Once set, it cannot be updated.
            #
            # By default, fastIpMove is set to DISABLED.
        "leader": { # Selects one of the network endpoints attached to the backend NEGs of
            # this service as the active endpoint (the leader) that receives all
            # traffic.
            #
            # When the leader changes, there is no connection draining to persist
            # existing connections on the old leader.
            #
            # You are responsible for selecting a suitable endpoint as the
            # leader. For example, preferring a healthy endpoint over unhealthy ones.
            # Note that this service does not track backend endpoint health, and
            # selects the configured leader unconditionally.
          "backendGroup": "A String", # A fully-qualified URL (starting with https://www.googleapis.com/)
              # of the zonal Network Endpoint Group (NEG) with `GCE_VM_IP` endpoints
              # that the leader is attached to.
              #
              # The leader's backendGroup must already be specified as a backend of
              # this backend service. Removing a backend that is designated as the
              # leader's backendGroup is not permitted.
          "networkEndpoint": { # The network endpoint within the leader.backendGroup that is
              # designated as the leader.
              #
              # This network endpoint cannot be detached from the NEG specified in
              # the haPolicy.leader.backendGroup until the leader is updated with
              # another network endpoint, or the leader is removed from the haPolicy.
            "instance": "A String", # The name of the VM instance of the leader network endpoint. The
                # instance must already be attached to the NEG specified in the
                # haPolicy.leader.backendGroup.
                #
                # The name must be 1-63 characters long, and comply with RFC1035.
                # Authorization requires the following IAM permission on the
                # specified resource instance: compute.instances.use
          },
        },
      },
      "healthChecks": [ # The list of URLs to the healthChecks, httpHealthChecks (legacy), or
          # httpsHealthChecks (legacy) resource for health checking this backend
          # service. Not all backend services support legacy health checks. See
          # Load balancer guide. Currently, at most one health check can be
          # specified for each backend service. Backend services with
          # instance group or zonal NEG backends must have a health check unless
          # haPolicy is specified. Backend services with internet or serverless NEG
          # backends must not have a health check.
          #
          # healthChecks[] cannot be specified with haPolicy.
        "A String",
      ],
      "iap": { # Identity-Aware Proxy # The configurations for Identity-Aware Proxy on this resource.
          # Not available for internal passthrough Network Load Balancers and external
          # passthrough Network Load Balancers.
        "enabled": True or False, # Whether the serving infrastructure will authenticate and authorize all
            # incoming requests.
        "oauth2ClientId": "A String", # OAuth2 client ID to use for the authentication flow.
        "oauth2ClientSecret": "A String", # OAuth2 client secret to use for the authentication flow.
            # For security reasons, this value cannot be retrieved via the API.
            # Instead, the SHA-256 hash of the value is returned in the
            # oauth2ClientSecretSha256 field.
            #
            # @InputOnly
        "oauth2ClientSecretSha256": "A String", # Output only. [Output Only] SHA256 hash value for the field oauth2_client_secret above.
      },
      "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is
          # defined by the server.
      "ipAddressSelectionPolicy": "A String", # Specifies a preference for traffic sent from the proxy to the backend (or
          # from the client to the backend for proxyless gRPC).
          # The possible values are:
          #
          #    - IPV4_ONLY: Only send IPv4 traffic to the backends of the
          #    backend service (Instance Group, Managed Instance Group, Network Endpoint
          #    Group), regardless of traffic from the client to the proxy. Only IPv4
          #    health checks are used to check the health of the backends. This is the
          #    default setting.
          #    - PREFER_IPV6: Prioritize the connection to the endpoint's
          #    IPv6 address over its IPv4 address (provided there is a healthy IPv6
          #    address).
          #    - IPV6_ONLY: Only send IPv6 traffic to the backends of the
          #    backend service (Instance Group, Managed Instance Group, Network Endpoint
          #    Group), regardless of traffic from the client to the proxy. Only IPv6
          #    health checks are used to check the health of the backends.
          #
          #
          #
          # This field is applicable to either:
          #
          #    -  Advanced global external Application Load Balancer (load balancing
          #    scheme EXTERNAL_MANAGED),
          #    -  Regional external Application Load
          #    Balancer,
          #    -  Internal proxy Network Load Balancer (load balancing
          #    scheme INTERNAL_MANAGED),
          #    -  Regional internal Application Load
          #    Balancer (load balancing scheme INTERNAL_MANAGED),
          #    -  Traffic
          #    Director with Envoy proxies and proxyless gRPC (load balancing scheme
          #    INTERNAL_SELF_MANAGED).
      "kind": "compute#backendService", # Output only. [Output Only] Type of resource. Always compute#backendService
          # for backend services.
      "loadBalancingScheme": "A String", # Specifies the load balancer type. A backend service
          # created for one type of load balancer cannot be used with another.
          # For more information, refer toChoosing
          # a load balancer.
      "localityLbPolicies": [ # A list of locality load-balancing policies to be used in order of
          # preference. When you use localityLbPolicies, you must set at least one
          # value for either the localityLbPolicies[].policy or the
          # localityLbPolicies[].customPolicy field. localityLbPolicies overrides any
          # value set in the localityLbPolicy field.
          #
          # For an example of how to use this field, seeDefine
          # a list of preferred policies.
          #
          # Caution: This field and its children are intended for use in a service mesh
          # that includes gRPC clients only. Envoy proxies can't use backend services
          # that have this configuration.
        { # Container for either a built-in LB policy supported by gRPC or Envoy or
            # a custom one implemented by the end user.
          "customPolicy": { # The configuration for a custom policy implemented by the user and
              # deployed with the client.
            "data": "A String", # An optional, arbitrary JSON object with configuration data, understood
                # by a locally installed custom policy implementation.
            "name": "A String", # Identifies the custom policy.
                #
                # The value should match the name of a custom implementation registered
                # on the gRPC clients. It should follow protocol buffer message naming
                # conventions and include the full path (for example,
                # myorg.CustomLbPolicy). The maximum length is 256 characters.
                #
                # Do not specify the same custom policy more than once for a
                # backend. If you do, the configuration is rejected.
                #
                # For an example of how to use this field, seeUse
                # a custom policy.
          },
          "policy": { # The configuration for a built-in load balancing policy.
            "name": "A String", # The name of a locality load-balancing policy. Valid values include
                # ROUND_ROBIN and, for Java clients, LEAST_REQUEST. For information
                # about these values, see the description of localityLbPolicy.
                #
                # Do not specify the same policy more than once for a
                # backend. If you do, the configuration is rejected.
          },
        },
      ],
      "localityLbPolicy": "A String", # The load balancing algorithm used within the scope of the locality. The
          # possible values are:
          #
          #    - ROUND_ROBIN: This is a simple policy in which each healthy
          #    backend is selected in round robin order. This is the default.
          #    - LEAST_REQUEST: An O(1) algorithm which
          #    selects two random healthy hosts and picks the host which has fewer active
          #    requests.
          #    - RING_HASH: The ring/modulo hash load balancer implements
          #    consistent hashing to backends. The algorithm has the property that the
          #    addition/removal of a host from a set of N hosts only affects 1/N of the
          #    requests.
          #    - RANDOM: The load balancer selects a random healthy
          #    host.
          #    - ORIGINAL_DESTINATION: Backend host is selected
          #    based on the client connection metadata, i.e., connections are opened to
          #    the same address as the destination address of the incoming connection
          #    before the connection was redirected to the load balancer.
          #    - MAGLEV: used as a drop in replacement for the ring hash
          #    load balancer. Maglev is not as stable as ring hash but has faster table
          #    lookup build times and host selection times. For more information about
          #    Maglev, see Maglev:
          #    A Fast and Reliable Software Network Load Balancer.
          #    - WEIGHTED_ROUND_ROBIN: Per-endpoint Weighted Round Robin
          #    Load Balancing using weights computed from Backend reported Custom Metrics.
          #    If set, the Backend Service responses are expected to contain non-standard
          #    HTTP response header field Endpoint-Load-Metrics. The reported
          #    metrics to use for computing the weights are specified via thecustomMetrics field.
          #
          #    This field is applicable to either:
          #       - A regional backend service with the service protocol set to HTTP,
          #       HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
          #       INTERNAL_MANAGED.
          #       - A global backend service with the
          #       load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or
          #       EXTERNAL_MANAGED.
          #
          #
          #    If sessionAffinity is not configured—that is, if session
          #    affinity remains at the default value of NONE—then the
          #    default value for localityLbPolicy
          #    is ROUND_ROBIN. If session affinity is set to a value other
          #    than NONE,
          #    then the default value for localityLbPolicy isMAGLEV.
          #
          #    Only ROUND_ROBIN and RING_HASH are supported
          #    when the backend service is referenced by a URL map that is bound to
          #    target gRPC proxy that has validateForProxyless field set to true.
          #
          #    localityLbPolicy cannot be specified with haPolicy.
      "logConfig": { # The available logging options for the load balancer traffic served by this # This field denotes the logging options for the load balancer traffic served
          # by this backend service. If logging is enabled, logs will be exported to
          # Stackdriver.
          # backend service.
        "enable": True or False, # Denotes whether to enable logging for the load balancer
            # traffic served by this backend service. The default value is false.
        "optionalFields": [ # This field can only be specified if logging is enabled for this backend
            # service and "logConfig.optionalMode" was set to CUSTOM. Contains a list
            # of optional fields you want to include in the logs. For example:
            # serverInstance, serverGkeDetails.cluster,
            # serverGkeDetails.pod.podNamespace
          "A String",
        ],
        "optionalMode": "A String", # This field can only be specified if logging is enabled for this backend
            # service. Configures whether all, none or a subset of optional fields
            # should be added to the reported logs. One of [INCLUDE_ALL_OPTIONAL,
            # EXCLUDE_ALL_OPTIONAL, CUSTOM]. Default is EXCLUDE_ALL_OPTIONAL.
        "sampleRate": 3.14, # This field can only be specified if logging is enabled for this backend
            # service. The value of the field must be in [0, 1]. This configures the
            # sampling rate of requests to the load balancer where 1.0 means all logged
            # requests are reported and 0.0 means no logged requests are reported. The
            # default value is 1.0.
      },
      "maxStreamDuration": { # A Duration represents a fixed-length span of time represented # Specifies the default maximum duration (timeout) for streams to this
          # service. Duration is computed from the beginning of the stream until the
          # response has been completely processed, including all retries. A stream
          # that does not complete in this duration is closed.
          #
          # If not specified, there will be no timeout limit, i.e. the maximum
          # duration is infinite.
          #
          # This value can be overridden in the PathMatcher configuration of the
          # UrlMap that references this backend service.
          #
          # This field is only allowed when the loadBalancingScheme of
          # the backend service is INTERNAL_SELF_MANAGED.
          # as a count of seconds and fractions of seconds at nanosecond
          # resolution. It is independent of any calendar and concepts like "day"
          # or "month". Range is approximately 10,000 years.
        "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
            # Durations less than one second are represented with a 0
            # `seconds` field and a positive `nanos` field. Must be from 0
            # to 999,999,999 inclusive.
        "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
            # to 315,576,000,000 inclusive. Note: these bounds are computed from:
            # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
      },
      "metadatas": { # Deployment metadata associated with the resource to be set by a GKE hub
          # controller and read by the backend RCTH
        "a_key": "A String",
      },
      "name": "A String", # Name of the resource. Provided by the client when the resource is created.
          # The name must be 1-63 characters long, and comply withRFC1035.
          # Specifically, the name must be 1-63 characters long and match the regular
          # expression `[a-z]([-a-z0-9]*[a-z0-9])?` which means the first
          # character must be a lowercase letter, and all following characters must
          # be a dash, lowercase letter, or digit, except the last character, which
          # cannot be a dash.
      "network": "A String", # The URL of the network to which this backend service belongs.
          #
          # This field must be set for Internal Passthrough Network Load Balancers when
          # the haPolicy is enabled, and for External Passthrough Network Load
          # Balancers when the haPolicy fastIpMove is enabled.
          #
          # This field can only be specified when the load balancing scheme is set toINTERNAL, or when the load balancing scheme is set toEXTERNAL and haPolicy fastIpMove is enabled.
      "networkPassThroughLbTrafficPolicy": { # Configures traffic steering properties of internal passthrough Network
          # Load Balancers.
          #
          # networkPassThroughLbTrafficPolicy cannot be specified with haPolicy.
        "zonalAffinity": { # When configured, new connections are load balanced across healthy backend
            # endpoints in the local zone.
          "spillover": "A String", # This field indicates whether zonal affinity is enabled or not. The
              # possible values are:
              #
              #    - ZONAL_AFFINITY_DISABLED: Default Value. Zonal Affinity
              #    is disabled. The load balancer distributes new connections to all
              #    healthy backend endpoints across all zones.
              #    - ZONAL_AFFINITY_STAY_WITHIN_ZONE: Zonal Affinity is
              #    enabled. The load balancer distributes new connections to all healthy
              #    backend endpoints in the local zone only. If there are no healthy
              #    backend endpoints in the local zone, the load balancer distributes
              #    new connections to all backend endpoints in the local zone.
              #    - ZONAL_AFFINITY_SPILL_CROSS_ZONE: Zonal Affinity is
              #    enabled. The load balancer distributes new connections to all healthy
              #    backend endpoints in the local zone only. If there aren't enough
              #    healthy backend endpoints in the local zone, the load balancer
              #    distributes new connections to all healthy backend endpoints across all
              #    zones.
          "spilloverRatio": 3.14, # The value of the field must be in [0, 1]. When the ratio of the count
              # of healthy backend endpoints in a zone to the count of backend
              # endpoints in that same zone is equal to or above this threshold, the
              # load balancer distributes new connections to all healthy endpoints in
              # the local zone only. When the ratio of the count of healthy backend
              # endpoints in a zone to the count of backend endpoints in that same
              # zone is below this threshold, the load balancer distributes all new
              # connections to all healthy endpoints across all zones.
        },
      },
      "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend service.
          # the backend service.
        "resourceUri": "A String", # The resource URI of the resource or system that manages the backend
            # service.
      },
      "outlierDetection": { # Settings controlling the eviction of unhealthy hosts from the load balancing # Settings controlling the ejection of unhealthy backend endpoints from the
          # load balancing pool of each individual proxy instance that processes the
          # traffic for the given backend service. If not set, this feature is
          # considered disabled.
          #
          # Results of the outlier detection algorithm (ejection of endpoints from the
          # load balancing pool and returning them back to the pool) are executed
          # independently by each proxy instance of the load balancer. In most cases,
          # more than one proxy instance handles the traffic received by a backend
          # service. Thus, it is possible that an unhealthy endpoint is detected and
          # ejected by only some of the proxies, and while this happens, other proxies
          # may continue to send requests to the same unhealthy endpoint until they
          # detect and eject the unhealthy endpoint.
          #
          # Applicable backend endpoints can be:
          #
          #    - VM instances in an Instance Group
          #    - Endpoints in a Zonal NEG (GCE_VM_IP, GCE_VM_IP_PORT)
          #    - Endpoints in a Hybrid Connectivity NEG (NON_GCP_PRIVATE_IP_PORT)
          #    - Serverless NEGs, that resolve to Cloud Run, App Engine, or Cloud
          #    Functions Services
          #    - Private Service Connect NEGs, that resolve to
          #    Google-managed regional API endpoints or managed services published using
          #    Private Service Connect
          #
          #
          #
          # Applicable backend service types can be:
          #
          #    - A global backend service with the loadBalancingScheme set to
          #    INTERNAL_SELF_MANAGED or EXTERNAL_MANAGED.
          #    - A regional backend
          #    service with the service protocol set to HTTP, HTTPS, HTTP2 or H2C, and
          #    loadBalancingScheme set to INTERNAL_MANAGED or EXTERNAL_MANAGED. Not
          #    supported for Serverless NEGs.
          #
          #
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
          # pool for the backend service.
        "baseEjectionTime": { # A Duration represents a fixed-length span of time represented # The base time that a backend endpoint is ejected for. Defaults to 30000ms
            # or 30s.
            #
            # After a backend endpoint is returned back to the load balancing pool, it
            # can be ejected again in another ejection analysis. Thus, the total ejection
            # time is equal to the base ejection time multiplied by the number of times
            # the backend endpoint has been ejected. Defaults to 30000ms or 30s.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "consecutiveErrors": 42, # Number of consecutive errors before a backend endpoint is ejected from the
            # load balancing pool. When the backend endpoint is accessed over HTTP, a 5xx
            # return code qualifies as an error. Defaults to 5.
        "consecutiveGatewayFailure": 42, # The number of consecutive gateway failures (502, 503, 504 status or
            # connection errors that are mapped to one of those status codes) before a
            # consecutive gateway failure ejection occurs. Defaults to 3.
        "enforcingConsecutiveErrors": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through consecutive 5xx. This setting can be
            # used to disable ejection or to ramp it up slowly. Defaults to 0.
        "enforcingConsecutiveGatewayFailure": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through consecutive gateway failures. This
            # setting can be used to disable ejection or to ramp it up slowly. Defaults
            # to 100.
        "enforcingSuccessRate": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through success rate statistics. This setting
            # can be used to disable ejection or to ramp it up slowly. Defaults to 100.
            #
            # Not supported when the backend service uses Serverless NEG.
        "interval": { # A Duration represents a fixed-length span of time represented # Time interval between ejection analysis sweeps. This can result in both new
            # ejections and backend endpoints being returned to service. The interval is
            # equal to the number of seconds as defined in
            # outlierDetection.interval.seconds plus the number of nanoseconds as defined
            # in outlierDetection.interval.nanos. Defaults to 1 second.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "maxEjectionPercent": 42, # Maximum percentage of backend endpoints in the load balancing pool for the
            # backend service that can be ejected if the ejection conditions are met.
            # Defaults to 50%.
        "successRateMinimumHosts": 42, # The number of backend endpoints in the load balancing pool that must have
            # enough request volume to detect success rate outliers. If the number of
            # backend endpoints is fewer than this setting, outlier detection via success
            # rate statistics is not performed for any backend endpoint in the load
            # balancing pool. Defaults to 5.
            #
            # Not supported when the backend service uses Serverless NEG.
        "successRateRequestVolume": 42, # The minimum number of total requests that must be collected in one interval
            # (as defined by the interval duration above) to include this backend
            # endpoint in success rate based outlier detection. If the volume is lower
            # than this setting, outlier detection via success rate statistics is not
            # performed for that backend endpoint. Defaults to 100.
            #
            # Not supported when the backend service uses Serverless NEG.
        "successRateStdevFactor": 42, # This factor is used to determine the ejection threshold for success rate
            # outlier ejection. The ejection threshold is the difference between the mean
            # success rate, and the product of this factor and the standard deviation of
            # the mean success rate: mean - (stdev * successRateStdevFactor). This factor
            # is divided by a thousand to get a double. That is, if the desired factor
            # is 1.9, the runtime value should be 1900. Defaults to 1900.
            #
            # Not supported when the backend service uses Serverless NEG.
      },
      "params": { # Additional Backend Service parameters. # Input only. [Input Only] Additional params passed with the request, but not persisted
          # as part of resource payload.
        "resourceManagerTags": { # Tag keys/values directly bound to this resource.
            # Tag keys and values have the same definition as resource
            # manager tags. The field is allowed for INSERT
            # only. The keys/values to set on the resource should be specified in
            # either ID { : } or Namespaced format
            # { : }.
            # For example the following are valid inputs:
            # * {"tagKeys/333" : "tagValues/444", "tagKeys/123" : "tagValues/456"}
            # * {"123/environment" : "production", "345/abc" : "xyz"}
            # Note:
            # * Invalid combinations of ID & namespaced format is not supported. For
            #   instance: {"123/environment" : "tagValues/444"} is invalid.
          "a_key": "A String",
        },
      },
      "port": 42, # Deprecated in favor of portName. The TCP port to connect on
          # the backend. The default value is 80.
          # For internal passthrough Network Load Balancers and external passthrough
          # Network Load Balancers, omit port.
      "portName": "A String", # A named port on a backend instance group representing the port for
          # communication to the backend VMs in that group. The
          # named port must be [defined on each backend instance
          # group](https://cloud.google.com/load-balancing/docs/backend-service#named_ports).
          # This parameter has no meaning if the backends are NEGs. For internal
          # passthrough Network Load Balancers and external passthrough Network Load
          # Balancers, omit port_name.
      "protocol": "A String", # The protocol this BackendService uses to communicate
          # with backends.
          #
          # Possible values are HTTP, HTTPS, HTTP2, H2C, TCP, SSL, UDP or GRPC.
          # depending on the chosen load balancer or Traffic Director configuration.
          # Refer to the documentation for the load balancers or for Traffic Director
          # for more information.
          #
          # Must be set to GRPC when the backend service is referenced by a URL map
          # that is bound to target gRPC proxy.
      "region": "A String", # Output only. [Output Only] URL of the region where the regional backend service
          # resides. This field is not applicable to global backend services.
          # You must specify this field as part of the HTTP request URL. It is
          # not settable as a field in the request body.
      "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this
          # backend service.
      "securitySettings": { # The authentication and authorization settings for a BackendService. # This field specifies the security settings that apply to this backend
          # service. This field is applicable to a global backend service with the
          # load_balancing_scheme set to INTERNAL_SELF_MANAGED.
        "authentication": "A String", # [Deprecated] Use clientTlsPolicy instead.
        "awsV4Authentication": { # Contains the configurations necessary to generate a signature for access to # The configuration needed to generate a signature for access to private
            # storage buckets that support AWS's Signature Version 4 for authentication.
            # Allowed only for INTERNET_IP_PORT and INTERNET_FQDN_PORT NEG backends.
            # private storage buckets that support Signature Version 4 for authentication.
            # The service name for generating the authentication header will always default
            # to 's3'.
          "accessKey": "A String", # The access key used for s3 bucket authentication. Required for updating or
              # creating a backend that uses AWS v4 signature authentication, but will not
              # be returned as part of the configuration when queried with a REST API GET
              # request.
              #
              # @InputOnly
          "accessKeyId": "A String", # The identifier of an access key used for s3 bucket authentication.
          "accessKeyVersion": "A String", # The optional version identifier for the access key. You can use this to
              # keep track of different iterations of your access key.
          "originRegion": "A String", # The name of the cloud region of your origin. This is a free-form field with
              # the name of the region your cloud uses to host your origin.  For example,
              # "us-east-1" for AWS or "us-ashburn-1" for OCI.
        },
        "clientTlsPolicy": "A String", # Optional. A URL referring to a networksecurity.ClientTlsPolicy resource
            # that describes how clients should authenticate with this service's
            # backends.
            #
            #  clientTlsPolicy only applies to a globalBackendService with the loadBalancingScheme set
            # to INTERNAL_SELF_MANAGED.
            #
            #  If left blank, communications are not encrypted.
        "subjectAltNames": [ # Optional. A list of Subject Alternative Names (SANs) that the client
            # verifies during a mutual TLS handshake with an server/endpoint for thisBackendService. When the server presents its X.509 certificate
            # to the client, the client inspects the certificate'ssubjectAltName field. If the field contains one of the
            # specified values, the communication continues. Otherwise, it fails. This
            # additional check enables the client to verify that the server is authorized
            # to run the requested service.
            #
            #  Note that the contents of the server
            # certificate's subjectAltName field are configured by the
            # Public Key Infrastructure which provisions server identities.
            #
            #  Only applies to a global BackendService withloadBalancingScheme set to INTERNAL_SELF_MANAGED.
            # Only applies when BackendService has an attachedclientTlsPolicy with clientCertificate (mTLS
            # mode).
          "A String",
        ],
      },
      "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
      "serviceBindings": [ # URLs of networkservices.ServiceBinding resources.
          #
          # Can only be set if load balancing scheme is INTERNAL_SELF_MANAGED.
          # If set, lists of backends and health checks must be both empty.
        "A String",
      ],
      "serviceLbPolicy": "A String", # URL to networkservices.ServiceLbPolicy resource.
          #
          # Can only be set if load balancing scheme is EXTERNAL_MANAGED,
          # INTERNAL_MANAGED or INTERNAL_SELF_MANAGED and the scope is global.
      "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
          #
          # Only NONE and HEADER_FIELD are supported
          # when the backend service is referenced by a URL map that is bound to
          # target gRPC proxy that has validateForProxyless field set to true.
          #
          # For more details, see:
          # [Session
          # Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity).
          #
          # sessionAffinity cannot be specified with haPolicy.
      "strongSessionAffinityCookie": { # The HTTP cookie used for stateful session affinity. # Describes the HTTP cookie used for stateful session affinity. This field is
          # applicable and required if the sessionAffinity is set toSTRONG_COOKIE_AFFINITY.
        "name": "A String", # Name of the cookie.
        "path": "A String", # Path to set for the cookie.
        "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
      },
      "subsetting": { # Subsetting configuration for this BackendService. # subsetting cannot be specified with haPolicy.
          # Currently this is applicable only for Internal TCP/UDP load balancing,
          # Internal HTTP(S) load balancing and Traffic Director.
        "policy": "A String",
        "subsetSize": 42, # The number of backends per backend group assigned to each proxy instance or
            # each service mesh client.
            #
            # An input parameter to the `CONSISTENT_HASH_SUBSETTING` algorithm.
            # Can only be set if `policy` is set to `CONSISTENT_HASH_SUBSETTING`.
            # Can only be set if load balancing scheme is `INTERNAL_MANAGED` or
            # `INTERNAL_SELF_MANAGED`.
            #
            # `subset_size` is optional for Internal HTTP(S) load balancing
            # and required for Traffic Director.
            #
            # If you do not provide this value, Cloud Load Balancing will calculate it
            # dynamically to optimize the number of proxies/clients visible to each
            # backend and vice versa.
            #
            # Must be greater than 0. If `subset_size` is larger than the number of
            # backends/endpoints, then subsetting is disabled.
      },
      "timeoutSec": 42, # The backend service timeout has a different meaning depending on the
          # type of load balancer. For more information see,
          # Backend service settings.
          # The default is 30 seconds.
          # The full range of timeout values allowed goes from 1
          # through 2,147,483,647 seconds.
          #
          # This value can be overridden in the PathMatcher configuration of the
          # UrlMap that references this backend service.
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
          # Instead, use maxStreamDuration.
      "tlsSettings": { # Configuration for Backend Authenticated TLS and mTLS. May only be specified
          # when the backend protocol is SSL, HTTPS or HTTP2.
        "authenticationConfig": "A String", # Reference to the BackendAuthenticationConfig resource from the
            # networksecurity.googleapis.com namespace. Can be used in authenticating
            # TLS connections to the backend, as specified by the authenticationMode
            # field. Can only be specified if authenticationMode is not NONE.
        "identity": "A String", # Assigns the Managed Identity for the BackendService Workload.
            #
            #
            # Use this property to configure the load balancer back-end to use
            # certificates and roots of trust provisioned by the Managed Workload
            # Identity system.
            #
            #  The `identity` property is the
            # fully-specified SPIFFE ID to use in the SVID presented by the Load
            # Balancer Workload.
            #
            #  The SPIFFE ID must be a resource starting with the
            # `trustDomain` property value, followed by the path to the Managed
            # Workload Identity.
            #
            #  Supported SPIFFE ID format:
            #
            #    - //<trust_domain>/ns/<namespace>/sa/<subject>
            #
            #
            # The Trust Domain within the Managed Identity must refer to a valid
            # Workload Identity Pool. The TrustConfig and CertificateIssuanceConfig
            # will be inherited from the Workload Identity Pool.
            #
            #  Restrictions:
            #
            #    - If you set the `identity` property, you cannot manually set
            #    the following fields:
            #        - tlsSettings.sni
            #       - tlsSettings.subjectAltNames
            #       - tlsSettings.authenticationConfig
            #
            #
            # When defining a `identity` for a RegionBackendServices, the
            # corresponding Workload Identity Pool must have a ca_pool
            # configured in the same region.
            #
            #  The system will set up a read-onlytlsSettings.authenticationConfig for the Managed Identity.
        "sni": "A String", # Server Name Indication - see RFC3546 section 3.1. If set, the load
            # balancer sends this string as the SNI hostname in the TLS connection to
            # the backend, and requires that this string match a Subject Alternative
            # Name (SAN) in the backend's server certificate. With a Regional Internet
            # NEG backend, if the SNI is specified here, the load balancer uses it
            # regardless of whether the Regional Internet NEG is specified with FQDN or
            # IP address and port. When both sni and subjectAltNames[] are specified,
            # the load balancer matches the backend certificate's SAN only to
            # subjectAltNames[].
        "subjectAltNames": [ # A list of Subject Alternative Names (SANs) that the Load Balancer
            # verifies during a TLS handshake with the backend. When the server
            # presents its X.509 certificate to the Load Balancer, the Load Balancer
            # inspects the certificate's SAN field, and requires that at least one SAN
            # match one of the subjectAltNames in the list. This field is limited to 5
            # entries. When both sni and subjectAltNames[] are specified, the load
            # balancer matches the backend certificate's SAN only to subjectAltNames[].
          { # A Subject Alternative Name that the load balancer matches against the SAN
              # field in the TLS certificate provided by the backend, specified as either
              # a DNS name or a URI, in accordance with RFC 5280 4.2.1.6
            "dnsName": "A String", # The SAN specified as a DNS Name.
            "uniformResourceIdentifier": "A String", # The SAN specified as a URI.
          },
        ],
      },
      "usedBy": [ # Output only. [Output Only] List of resources referencing given backend service.
        {
          "reference": "A String", # Output only. [Output Only] Server-defined URL for resources referencing given
              # BackendService like UrlMaps, TargetTcpProxies, TargetSslProxies
              # and ForwardingRule.
        },
      ],
    }

      requestId: string, An optional request ID to identify requests. Specify a unique request ID so
    that if you must retry your request, the server will know to ignore the
    request if it has already been completed.

    For example, consider a situation where you make an initial request and
    the request times out. If you make the request again with the same
    request ID, the server can check if original operation with the same
    request ID was received, and if so, will ignore the second request. This
    prevents clients from accidentally creating duplicate commitments.

    The request ID must be
    a valid UUID with the exception that zero UUID is not supported
    (00000000-0000-0000-0000-000000000000).
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Represents an Operation resource.
        #
        # Google Compute Engine has three Operation resources:
        #
        # * [Global](/compute/docs/reference/rest/beta/globalOperations)
        # * [Regional](/compute/docs/reference/rest/beta/regionOperations)
        # * [Zonal](/compute/docs/reference/rest/beta/zoneOperations)
        #
        # You can use an operation resource to manage asynchronous API requests.
        # For more information, readHandling
        # API responses.
        #
        # Operations can be global, regional or zonal.
        #
        #    - For global operations, use the `globalOperations`
        #    resource.
        #    - For regional operations, use the
        #    `regionOperations` resource.
        #    - For zonal operations, use
        #    the `zoneOperations` resource.
        #
        #
        #
        # For more information, read
        # Global, Regional, and Zonal Resources.
        #
        # Note that completed Operation resources have a limited
        # retention period.
      "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request.
          # Not present otherwise.
      "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
      "description": "A String", # [Output Only] A textual description of the operation, which is
          # set when the operation is created.
      "endTime": "A String", # [Output Only] The time that this operation was completed. This value is inRFC3339
          # text format.
      "error": { # [Output Only] If errors are generated during processing of the operation,
          # this field will be populated.
        "errors": [ # [Output Only] The array of errors encountered while processing this
            # operation.
          {
            "code": "A String", # [Output Only] The error type identifier for this error.
            "errorDetails": [ # [Output Only] An optional list of messages that contain the error
                # details. There is a set of defined message types to use for providing
                # details.The syntax depends on the error code. For example,
                # QuotaExceededInfo will have details when the error code is
                # QUOTA_EXCEEDED.
              {
                "errorInfo": { # Describes the cause of the error with structured details.
                    #
                    # Example of an error when contacting the "pubsub.googleapis.com" API when it
                    # is not enabled:
                    #
                    #     { "reason": "API_DISABLED"
                    #       "domain": "googleapis.com"
                    #       "metadata": {
                    #         "resource": "projects/123",
                    #         "service": "pubsub.googleapis.com"
                    #       }
                    #     }
                    #
                    # This response indicates that the pubsub.googleapis.com API is not enabled.
                    #
                    # Example of an error that is returned when attempting to create a Spanner
                    # instance in a region that is out of stock:
                    #
                    #     { "reason": "STOCKOUT"
                    #       "domain": "spanner.googleapis.com",
                    #       "metadata": {
                    #         "availableRegions": "us-central1,us-east2"
                    #       }
                    #     }
                  "domain": "A String", # The logical grouping to which the "reason" belongs. The error domain
                      # is typically the registered service name of the tool or product that
                      # generates the error. Example: "pubsub.googleapis.com". If the error is
                      # generated by some common infrastructure, the error domain must be a
                      # globally unique value that identifies the infrastructure. For Google API
                      # infrastructure, the error domain is "googleapis.com".
                  "metadatas": { # Additional structured details about this error.
                      #
                      # Keys must match a regular expression of `a-z+` but should
                      # ideally be lowerCamelCase. Also, they must be limited to 64 characters in
                      # length. When identifying the current value of an exceeded limit, the units
                      # should be contained in the key, not the value.  For example, rather than
                      # `{"instanceLimit": "100/request"}`, should be returned as,
                      # `{"instanceLimitPerRequest": "100"}`, if the client exceeds the number of
                      # instances that can be created in a single (batch) request.
                    "a_key": "A String",
                  },
                  "reason": "A String", # The reason of the error. This is a constant value that identifies the
                      # proximate cause of the error. Error reasons are unique within a particular
                      # domain of errors. This should be at most 63 characters and match a
                      # regular expression of `A-Z+[A-Z0-9]`, which represents
                      # UPPER_SNAKE_CASE.
                },
                "help": { # Provides links to documentation or for performing an out of band action.
                    #
                    # For example, if a quota check failed with an error indicating the calling
                    # project hasn't enabled the accessed service, this can contain a URL pointing
                    # directly to the right place in the developer console to flip the bit.
                  "links": [ # URL(s) pointing to additional information on handling the current error.
                    { # Describes a URL link.
                      "description": "A String", # Describes what the link offers.
                      "url": "A String", # The URL of the link.
                    },
                  ],
                },
                "localizedMessage": { # Provides a localized error message that is safe to return to the user
                    # which can be attached to an RPC error.
                  "locale": "A String", # The locale used following the specification defined at
                      # https://www.rfc-editor.org/rfc/bcp/bcp47.txt.
                      # Examples are: "en-US", "fr-CH", "es-MX"
                  "message": "A String", # The localized error message in the above locale.
                },
                "quotaInfo": { # Additional details for quota exceeded error for resource quota.
                  "dimensions": { # The map holding related quota dimensions.
                    "a_key": "A String",
                  },
                  "futureLimit": 3.14, # Future quota limit being rolled out. The limit's unit depends on the quota
                      #  type or metric.
                  "limit": 3.14, # Current effective quota limit. The limit's unit depends on the quota type
                      # or metric.
                  "limitName": "A String", # The name of the quota limit.
                  "metricName": "A String", # The Compute Engine quota metric name.
                  "rolloutStatus": "A String", # Rollout status of the future quota limit.
                },
              },
            ],
            "location": "A String", # [Output Only] Indicates the field in the request that caused the error.
                # This property is optional.
            "message": "A String", # [Output Only] An optional, human-readable error message.
          },
        ],
      },
      "getVersionOperationMetadata": {
        "inlineSbomInfo": {
          "currentComponentVersions": { # SBOM versions currently applied to the resource. The key is the component
              # name and the value is the version.
            "a_key": "A String",
          },
          "targetComponentVersions": { # SBOM versions scheduled for the next maintenance. The key is the
              # component name and the value is the version.
            "a_key": "A String",
          },
        },
      },
      "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error
          # message that was returned, such as `NOT FOUND`.
      "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error
          # status code that was returned. For example, a `404` means the
          # resource was not found.
      "id": "A String", # [Output Only] The unique identifier for the operation. This identifier is
          # defined by the server.
      "insertTime": "A String", # [Output Only] The time that this operation was requested.
          # This value is inRFC3339
          # text format.
      "instancesBulkInsertOperationMetadata": {
        "perLocationStatus": { # Status information per location (location name is key).
            # Example key: zones/us-central1-a
          "a_key": {
            "createdVmCount": 42, # [Output Only] Count of VMs successfully created so far.
            "deletedVmCount": 42, # [Output Only] Count of VMs that got deleted during rollback.
            "failedToCreateVmCount": 42, # [Output Only] Count of VMs that started creating but encountered an
                # error.
            "status": "A String", # [Output Only] Creation status of BulkInsert operation - information
                # if the flow is rolling forward or rolling back.
            "targetVmCount": 42, # [Output Only] Count of VMs originally planned to be created.
          },
        },
      },
      "kind": "compute#operation", # Output only. [Output Only] Type of the resource. Always `compute#operation` for
          # Operation resources.
      "name": "A String", # [Output Only] Name of the operation.
      "operationGroupId": "A String", # Output only. [Output Only] An ID that represents a group of operations, such as when a
          # group of operations results from a `bulkInsert` API request.
      "operationType": "A String", # [Output Only] The type of operation, such as `insert`,
          # `update`, or `delete`, and so on.
      "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100.
          # There is no requirement that this be linear or support any granularity of
          # operations. This should not be used to guess when the operation will be
          # complete. This number should monotonically increase as the operation
          # progresses.
      "region": "A String", # [Output Only] The URL of the region where the operation resides. Only
          # applicable when performing regional operations.
      "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
      "setCommonInstanceMetadataOperationMetadata": { # Output only. [Output Only] If the operation is for projects.setCommonInstanceMetadata,
          # this field will contain information on all underlying zonal actions and
          # their state.
        "clientOperationId": "A String", # [Output Only] The client operation id.
        "perLocationOperations": { # [Output Only] Status information per location (location name is key).
            # Example key: zones/us-central1-a
          "a_key": {
            "error": { # The `Status` type defines a logical error model that is suitable for # [Output Only] If state is `ABANDONED` or `FAILED`, this field is
                # populated.
                # different programming environments, including REST APIs and RPC APIs. It is
                # used by [gRPC](https://github.com/grpc). Each `Status` message contains
                # three pieces of data: error code, error message, and error details.
                #
                # You can find out more about this error model and how to work with it in the
                # [API Design Guide](https://cloud.google.com/apis/design/errors).
              "code": 42, # The status code, which should be an enum value of google.rpc.Code.
              "details": [ # A list of messages that carry the error details.  There is a common set of
                  # message types for APIs to use.
                {
                  "a_key": "", # Properties of the object. Contains field @type with type URL.
                },
              ],
              "message": "A String", # A developer-facing error message, which should be in English. Any
                  # user-facing error message should be localized and sent in the
                  # google.rpc.Status.details field, or localized by the client.
            },
            "state": "A String", # [Output Only] Status of the action, which can be one of the following:
                # `PROPAGATING`, `PROPAGATED`, `ABANDONED`, `FAILED`, or `DONE`.
          },
        },
      },
      "startTime": "A String", # [Output Only] The time that this operation was started by the server.
          # This value is inRFC3339
          # text format.
      "status": "A String", # [Output Only] The status of the operation, which can be one of the
          # following:
          # `PENDING`, `RUNNING`, or `DONE`.
      "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the
          # operation.
      "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation
          # of the target resource.
      "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies. For
          # operations related to creating a snapshot, this points to the disk
          # that the snapshot was created from.
      "user": "A String", # [Output Only] User who requested the operation, for example:
          # `user@example.com` or
          # `alice_smith_identifier (global/workforcePools/example-com-us-employees)`.
      "warnings": [ # [Output Only] If warning messages are generated during processing of the
          # operation, this field will be populated.
        {
          "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute
              # Engine returns NO_RESULTS_ON_PAGE if there
              # are no results in the response.
          "data": [ # [Output Only] Metadata about this warning in key:
              # value format. For example:
              #
              # "data": [
              #   {
              #    "key": "scope",
              #    "value": "zones/us-east1-d"
              #   }
            {
              "key": "A String", # [Output Only] A key that provides more detail on the warning being
                  # returned. For example, for warnings where there are no results in a list
                  # request for a particular zone, this key might be scope and
                  # the key value might be the zone name. Other examples might be a key
                  # indicating a deprecated resource and a suggested replacement, or a
                  # warning about invalid network settings (for example, if an instance
                  # attempts to perform IP forwarding but is not enabled for IP forwarding).
              "value": "A String", # [Output Only] A warning data value corresponding to the key.
            },
          ],
          "message": "A String", # [Output Only] A human-readable description of the warning code.
        },
      ],
      "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only
          # applicable when performing per-zone operations.
    }

`list(project, region, filter=None, maxResults=None, orderBy=None, pageToken=None, returnPartialSuccess=None, x__xgafv=None)`

    Retrieves the list of regional BackendService resources available to the
    specified project in the given region.

    Args:
      project: string, Project ID for this request. (required)
      region: string, Name of the region scoping this request. (required)
      filter: string, A filter expression that filters resources listed in the response. Most
    Compute resources support two types of filter expressions:
    expressions that support regular expressions and expressions that follow
    API improvement proposal AIP-160.
    These two types of filter expressions cannot be mixed in one request.

    If you want to use AIP-160, your expression must specify the field name, an
    operator, and the value that you want to use for filtering. The value
    must be a string, a number, or a boolean. The operator
    must be either `=`, `!=`, `>`, `<`, `<=`, `>=` or `:`.

    For example, if you are filtering Compute Engine instances, you can
    exclude instances named `example-instance` by specifying
    `name != example-instance`.

    The `:*` comparison can be used to test whether a key has been defined.
    For example, to find all objects with `owner` label use:
    ```
    labels.owner:*
    ```

    You can also filter nested fields. For example, you could specify
    `scheduling.automaticRestart = false` to include instances only
    if they are not scheduled for automatic restarts. You can use filtering
    on nested fields to filter based onresource labels.

    To filter on multiple expressions, provide each separate expression within
    parentheses. For example:
    ```
    (scheduling.automaticRestart = true)
    (cpuPlatform = "Intel Skylake")
    ```
    By default, each expression is an `AND` expression. However, you
    can include `AND` and `OR` expressions explicitly.
    For example:
    ```
    (cpuPlatform = "Intel Skylake") OR
    (cpuPlatform = "Intel Broadwell") AND
    (scheduling.automaticRestart = true)
    ```

    If you want to use a regular expression, use the `eq` (equal) or `ne`
    (not equal) operator against a single un-parenthesized expression with or
    without quotes or against multiple parenthesized expressions. Examples:

    `fieldname eq unquoted literal`
    `fieldname eq 'single quoted literal'`
    `fieldname eq "double quoted literal"`
    `(fieldname1 eq literal) (fieldname2 ne "literal")`

    The literal value is interpreted as a regular expression using GoogleRE2 library syntax.
    The literal value must match the entire field.

    For example, to filter for instances that do not end with name "instance",
    you would use `name ne .*instance`.

    You cannot combine constraints on multiple fields using regular
    expressions.
      maxResults: integer, The maximum number of results per page that should be returned.
    If the number of available results is larger than `maxResults`,
    Compute Engine returns a `nextPageToken` that can be used to get
    the next page of results in subsequent list requests. Acceptable values are
    `0` to `500`, inclusive. (Default: `500`)
      orderBy: string, Sorts list results by a certain order. By default, results
    are returned in alphanumerical order based on the resource name.

    You can also sort results in descending order based on the creation
    timestamp using `orderBy="creationTimestamp desc"`. This sorts
    results based on the `creationTimestamp` field in
    reverse chronological order (newest result first). Use this to sort
    resources like operations so that the newest operation is returned first.

    Currently, only sorting by `name` or
    `creationTimestamp desc` is supported.
      pageToken: string, Specifies a page token to use. Set `pageToken` to the
    `nextPageToken` returned by a previous list request to get
    the next page of results.
      returnPartialSuccess: boolean, Opt-in for partial success behavior which provides partial results in case
    of failure. The default value is false.

    For example, when partial success behavior is enabled, aggregatedList for a
    single zone scope either returns all resources in the zone or no resources,
    with an error code.
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Contains a list of BackendService resources.
      "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
      "items": [ # A list of BackendService resources.
        { # Represents a Backend Service resource.
            #
            # A backend service defines how Google Cloud load balancers distribute traffic.
            # The backend service configuration contains a set of values, such as the
            # protocol used to connect to backends, various distribution and session
            # settings, health checks, and timeouts. These settings provide fine-grained
            # control over how your load balancer behaves. Most of the settings have
            # default values that allow for easy configuration if you need to get started
            # quickly.
            #
            # Backend services in Google Compute Engine can be either regionally or
            # globally scoped.
            #
            # * [Global](https://cloud.google.com/compute/docs/reference/rest/beta/backendServices)
            # * [Regional](https://cloud.google.com/compute/docs/reference/rest/beta/regionBackendServices)
            #
            # For more information, seeBackend
            # Services.
          "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds. This setting is applicable to Application
              # Load Balancers and Traffic Director and requires
              # GENERATED_COOKIE or HTTP_COOKIE session affinity.
              #
              # If set to 0, the cookie is non-persistent and lasts only until
              # the end of the browser session (or equivalent). The maximum allowed value
              # is two weeks (1,209,600).
              #
              # Not supported when the backend service is referenced by a URL map that is
              # bound to target gRPC proxy that has validateForProxyless field set to true.
          "backends": [ # The list of backends that serve this BackendService.
            { # Message containing information of one individual backend.
              "balancingMode": "A String", # Specifies how to determine whether the backend of a load balancer can
                  # handle additional traffic or is fully loaded. For usage guidelines, see
                  # Connection balancing mode.
                  #
                  # Backends must use compatible balancing modes. For more information, see
                  # Supported balancing modes and target capacity settings and
                  # Restrictions and guidance for instance groups.
                  #
                  # Note: Currently, if you use the API to configure incompatible balancing
                  # modes, the configuration might be accepted even though it has no impact
                  # and is ignored. Specifically, Backend.maxUtilization is ignored when
                  # Backend.balancingMode is RATE. In the future, this incompatible combination
                  # will be rejected.
              "capacityScaler": 3.14, # A multiplier applied to the backend's target capacity of its balancing
                  # mode.
                  # The default value is 1, which means the group serves up to
                  # 100% of its configured capacity (depending onbalancingMode). A setting of 0 means the group is
                  # completely drained, offering 0% of its available capacity. The valid ranges
                  # are 0.0 and [0.1,1.0].
                  # You cannot configure a setting larger than 0 and smaller than0.1.
                  # You cannot configure a setting of 0 when there is only one
                  # backend attached to the backend service.
                  #
                  # Not available with backends that don't support using abalancingMode. This includes backends such as global
                  # internet NEGs, regional serverless NEGs, and PSC NEGs.
              "customMetrics": [ # List of custom metrics that are used for CUSTOM_METRICS
                  # BalancingMode.
                { # Custom Metrics are used for CUSTOM_METRICS balancing_mode.
                  "dryRun": True or False, # If true, the metric data is collected and reported to Cloud
                      # Monitoring, but is not used for load balancing.
                  "maxUtilization": 3.14, # Optional parameter to define a target utilization for the Custom Metrics
                      # balancing mode. The valid range is [0.0, 1.0].
                  "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
                      # long and match the regular expression
                      # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
                      # first character must be a lowercase letter, and all following
                      # characters must be a dash, period, underscore, lowercase letter, or
                      # digit, except the last character, which cannot be a dash, period, or
                      # underscore. For usage guidelines, see Custom Metrics balancing mode. This
                      # field can only be used for a global or regional backend service with the
                      # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
                },
              ],
              "description": "A String", # An optional description of this resource. Provide this property when you
                  # create the resource.
              "failover": True or False, # This field designates whether this is a failover backend. More than one
                  # failover backend can be configured for a given BackendService.
              "group": "A String", # The fully-qualified URL of aninstance
                  # group or network endpoint
                  # group (NEG) resource. To determine what types of backends a load
                  # balancer supports, see the [Backend services
                  # overview](https://cloud.google.com/load-balancing/docs/backend-service#backends).
                  #
                  # You must use the *fully-qualified* URL (starting withhttps://www.googleapis.com/) to specify the instance group
                  # or NEG. Partial URLs are not supported.
                  #
                  # If haPolicy is specified, backends must refer to NEG resources of type
                  # GCE_VM_IP.
              "maxConnections": 42, # Defines a target maximum number of simultaneous connections. For usage
                  # guidelines, seeConnection
                  # balancing mode and Utilization
                  # balancing mode. Not available if the backend'sbalancingMode is RATE.
              "maxConnectionsPerEndpoint": 42, # Defines a target maximum number of simultaneous connections.  For usage
                  # guidelines, seeConnection
                  # balancing mode and Utilization
                  # balancing mode.
                  #
                  # Not available if the backend's balancingMode isRATE.
              "maxConnectionsPerInstance": 42, # Defines a target maximum number of simultaneous connections.
                  # For usage guidelines, seeConnection
                  # balancing mode and Utilization
                  # balancing mode.
                  #
                  # Not available if the backend's balancingMode isRATE.
              "maxInFlightRequests": 42, # Defines a maximum number of in-flight requests for the whole NEG or
                  # instance group. Not available if backend's balancingMode isRATE or CONNECTION.
              "maxInFlightRequestsPerEndpoint": 42, # Defines a maximum number of in-flight requests for a single endpoint.
                  # Not available if backend's balancingMode is RATE
                  # or CONNECTION.
              "maxInFlightRequestsPerInstance": 42, # Defines a maximum number of in-flight requests for a single VM.
                  # Not available if backend's balancingMode is RATE
                  # or CONNECTION.
              "maxRate": 42, # Defines a maximum number of HTTP requests per second (RPS). For
                  # usage guidelines, seeRate
                  # balancing mode and Utilization
                  # balancing mode.
                  #
                  # Not available if the backend's balancingMode isCONNECTION.
              "maxRatePerEndpoint": 3.14, # Defines a maximum target for requests per second (RPS). For usage
                  # guidelines, seeRate
                  # balancing mode and Utilization
                  # balancing mode.
                  #
                  # Not available if the backend's balancingMode isCONNECTION.
              "maxRatePerInstance": 3.14, # Defines a maximum target for requests per second (RPS). For usage
                  # guidelines, seeRate
                  # balancing mode and Utilization
                  # balancing mode.
                  #
                  # Not available if the backend's balancingMode isCONNECTION.
              "maxUtilization": 3.14, # Optional parameter to define a target capacity for theUTILIZATION balancing mode. The valid range is[0.0, 1.0].
                  #
                  # For usage guidelines, seeUtilization
                  # balancing mode.
              "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend.
                  # the backend.
                "resourceUri": "A String", # The URI of the resource or system that manages the backend.
              },
              "preference": "A String", # This field indicates whether this backend should be fully utilized before
                  # sending traffic to backends with default preference. The possible values
                  # are:
                  #
                  #    - PREFERRED: Backends with this preference level will be
                  #    filled up to their capacity limits first, based on RTT.
                  #    - DEFAULT:  If preferred backends don't have enough
                  #    capacity, backends in this layer would be used and traffic would be
                  #    assigned based on the load balancing algorithm you use. This is the
                  #    default
              "service": "A String", # Represents a service backend (e.g., Cloud Run service, PSC Service
                  # Attachment).
                  # e.g.
                  #  "run.googleapis.com/projects/123456789/locations/us-central1/services/my-service"
                  #  for Cloud Run service.
                  #  "compute.googleapis.com/projects/123456789/regions/us-central1/serviceAttachments/my-service-attachment"
                  #  for PSC Service Attachment.
              "trafficDuration": "A String",
            },
          ],
          "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService. Only available for
              # specified load balancer types.
            "bypassCacheOnRequestHeaders": [ # Bypass the cache when the specified request headers are matched - e.g.
                # Pragma or Authorization headers. Up to 5 headers can be specified.
                # The cache is bypassed for all cdnPolicy.cacheMode settings.
              { # Bypass the cache when the specified request headers are present,
                  # e.g. Pragma or Authorization headers. Values are case insensitive.
                  # The presence of such a header overrides the cache_mode setting.
                "headerName": "A String", # The header field name to match on when bypassing cache.
                    # Values are case-insensitive.
              },
            ],
            "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud # The CacheKeyPolicy for this CdnPolicy.
                # CDN.
              "includeHost": True or False, # If true, requests to different hosts will be cached separately.
              "includeHttpHeaders": [ # Allows HTTP request headers (by name) to be used in the cache key.
                "A String",
              ],
              "includeNamedCookies": [ # Allows HTTP cookies (by name) to be used in the cache key.
                  # The name=value pair will be used in the cache key Cloud CDN generates.
                "A String",
              ],
              "includeProtocol": True or False, # If true, http and https requests will be cached separately.
              "includeQueryString": True or False, # If true, include query string parameters in the cache key according to
                  # query_string_whitelist and query_string_blacklist. If neither is set, the
                  # entire query string will be included. If false, the query string will be
                  # excluded from the cache key entirely.
              "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other
                  # parameters will be included. Either specify query_string_whitelist or
                  # query_string_blacklist, not both. '&' and '=' will be percent encoded and
                  # not treated as delimiters.
                "A String",
              ],
              "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other
                  # parameters will be excluded. Either specify query_string_whitelist or
                  # query_string_blacklist, not both. '&' and '=' will be percent encoded and
                  # not treated as delimiters.
                "A String",
              ],
            },
            "cacheMode": "A String", # Specifies the cache setting for all responses from this backend.
                # The possible values are:USE_ORIGIN_HEADERS Requires the origin to set valid caching
                # headers to cache content. Responses without these headers will not be
                # cached at Google's edge, and will require a full trip to the origin on
                # every request, potentially impacting performance and increasing load on
                # the origin server.FORCE_CACHE_ALL Cache all content, ignoring any "private",
                # "no-store" or "no-cache" directives in Cache-Control response headers.
                # Warning: this may result in Cloud CDN caching private,
                # per-user (user identifiable) content.CACHE_ALL_STATIC Automatically cache static content,
                # including common image formats, media (video and audio), and web assets
                # (JavaScript and CSS). Requests and responses that are marked as
                # uncacheable, as well as dynamic content (including HTML), will not be
                # cached.
                #
                # If no value is provided for cdnPolicy.cacheMode, it defaults
                # to CACHE_ALL_STATIC.
            "clientTtl": 42, # Specifies a separate client (e.g. browser client) maximum TTL. This is
                # used to clamp the max-age (or Expires) value sent to the client.  With
                # FORCE_CACHE_ALL, the lesser of client_ttl and default_ttl is used for the
                # response max-age directive, along with a "public" directive.  For
                # cacheable content in CACHE_ALL_STATIC mode, client_ttl clamps the max-age
                # from the origin (if specified), or else sets the response max-age
                # directive to the lesser of the client_ttl and default_ttl, and also
                # ensures a "public" cache-control directive is present.
                # If a client TTL is not specified, a default value (1 hour) will be used.
                # The maximum allowed value is 31,622,400s (1 year).
            "defaultTtl": 42, # Specifies the default TTL for cached content served by this origin for
                # responses that do not have an existing valid TTL (max-age or s-maxage).
                # Setting a TTL of "0" means "always revalidate".
                # The value of defaultTTL cannot be set to a value greater than that of
                # maxTTL, but can be equal.
                # When the cacheMode is set to FORCE_CACHE_ALL, the defaultTTL
                # will overwrite the TTL set in all responses. The maximum allowed value is
                # 31,622,400s (1 year), noting that infrequently accessed objects may be
                # evicted from the cache before the defined TTL.
            "maxTtl": 42, # Specifies the maximum allowed TTL for cached content served by this
                # origin.
                # Cache directives that attempt to set a max-age or s-maxage higher than
                # this, or an Expires header more than maxTTL seconds in the future will
                # be capped at the value of maxTTL, as if it were the value of an
                # s-maxage Cache-Control directive.
                # Headers sent to the client will not be modified.
                # Setting a TTL of "0" means "always revalidate".
                # The maximum allowed value is 31,622,400s (1 year), noting that
                # infrequently accessed objects may be evicted from the cache before
                # the defined TTL.
            "negativeCaching": True or False, # Negative caching allows per-status code TTLs to be set, in order
                # to apply fine-grained caching for common errors or redirects.
                # This can reduce the load on your origin and improve end-user
                # experience by reducing response latency.
                # When the cache mode is set to CACHE_ALL_STATIC or USE_ORIGIN_HEADERS,
                # negative caching applies to responses with the specified response code
                # that lack any Cache-Control, Expires, or Pragma: no-cache directives.
                # When the cache mode is set to FORCE_CACHE_ALL, negative caching applies
                # to all responses with the specified response code, and override any
                # caching headers.
                # By default, Cloud CDN will apply the following default TTLs to these
                # status codes:
                # HTTP 300 (Multiple Choice), 301, 308 (Permanent Redirects): 10m
                # HTTP 404 (Not Found), 410 (Gone),
                # 451 (Unavailable For Legal Reasons): 120s
                # HTTP 405 (Method Not Found), 501 (Not Implemented): 60s.
                # These defaults can be overridden in negative_caching_policy.
            "negativeCachingPolicy": [ # Sets a cache TTL for the specified HTTP status code.
                # negative_caching must be enabled to configure negative_caching_policy.
                # Omitting the policy and leaving negative_caching enabled will use
                # Cloud CDN's default cache TTLs.
                # Note that when specifying an explicit negative_caching_policy, you
                # should take care to specify a cache TTL for all response codes
                # that you wish to cache. Cloud CDN will not apply any default
                # negative caching when a policy exists.
              { # Specify CDN TTLs for response error codes.
                "code": 42, # The HTTP status code to define a TTL against. Only HTTP status codes
                    # 300, 301, 302, 307, 308, 404, 405, 410, 421, 451 and 501 can be
                    # specified as values, and you cannot specify a status code more than
                    # once.
                "ttl": 42, # The TTL (in seconds) for which to cache responses with the
                    # corresponding status code.
                    # The maximum allowed value is 1800s (30 minutes), noting that
                    # infrequently accessed objects may be evicted from the cache before the
                    # defined TTL.
              },
            ],
            "requestCoalescing": True or False, # If true then Cloud CDN will combine multiple concurrent cache fill
                # requests into a small number of requests to the origin.
            "serveWhileStale": 42, # Serve existing content from the cache (if available) when revalidating
                # content with the origin, or when an error is encountered when refreshing
                # the cache.
                # This setting defines the default "max-stale" duration for any cached
                # responses that do not specify a max-stale directive. Stale responses that
                # exceed the TTL configured here will not be served. The default limit
                # (max-stale) is 86400s (1 day), which will allow stale content to be
                # served up to this limit beyond the max-age (or s-maxage) of a cached
                # response.
                # The maximum allowed value is 604800 (1 week).
                # Set this to zero (0) to disable serve-while-stale.
            "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be
                # considered fresh. After this time period, the response will be
                # revalidated before being served. Defaults to 1hr (3600s).  When serving
                # responses to signed URL requests, Cloud CDN will internally behave as
                # though all responses from this backend had a "Cache-Control:
                # public, max-age=[TTL]" header, regardless of any existing
                # Cache-Control header. The actual headers served in responses will not be
                # altered.
            "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
              "A String",
            ],
          },
          "circuitBreakers": { # Settings controlling the volume of requests, connections and retries to this
              # backend service.
            "connectTimeout": { # A Duration represents a fixed-length span of time represented # The timeout for new network connections to hosts.
                # as a count of seconds and fractions of seconds at nanosecond
                # resolution. It is independent of any calendar and concepts like "day"
                # or "month". Range is approximately 10,000 years.
              "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                  # Durations less than one second are represented with a 0
                  # `seconds` field and a positive `nanos` field. Must be from 0
                  # to 999,999,999 inclusive.
              "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                  # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                  # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
            },
            "maxConnections": 42, # The maximum number of connections to the backend service. If not specified,
                # there is no limit.
                #
                # Not supported when the backend service is referenced by a URL map that is
                # bound to target gRPC proxy that has validateForProxyless field set to true.
            "maxPendingRequests": 42, # The maximum number of pending requests allowed to the backend service. If
                # not specified, there is no limit.
                #
                # Not supported when the backend service is referenced by a URL map that is
                # bound to target gRPC proxy that has validateForProxyless field set to true.
            "maxRequests": 42, # The maximum number of parallel requests that allowed to the backend
                # service. If not specified, there is no limit.
            "maxRequestsPerConnection": 42, # Maximum requests for a single connection to the backend service.
                # This parameter is respected by both the HTTP/1.1 and HTTP/2
                # implementations. If not specified, there is no limit. Setting this
                # parameter to 1 will effectively disable keep alive.
                #
                # Not supported when the backend service is referenced by a URL map that is
                # bound to target gRPC proxy that has validateForProxyless field set to true.
            "maxRetries": 42, # The maximum number of parallel retries allowed to the backend cluster. If
                # not specified, the default is 1.
                #
                # Not supported when the backend service is referenced by a URL map that is
                # bound to target gRPC proxy that has validateForProxyless field set to true.
          },
          "compressionMode": "A String", # Compress text responses using Brotli or gzip compression, based on
              # the client's Accept-Encoding header.
          "connectionDraining": { # Message containing connection draining configuration. # connectionDraining cannot be specified with haPolicy.
            "drainingTimeoutSec": 42, # Configures a duration timeout for existing requests on a removed backend
                # instance. For supported load balancers and protocols, as described inEnabling
                # connection draining.
          },
          "connectionTrackingPolicy": { # Connection Tracking configuration for this BackendService. # Connection Tracking configuration for this BackendService. Connection
              # tracking policy settings are only available for external passthrough
              # Network Load Balancers and internal passthrough Network Load Balancers.
              #
              # connectionTrackingPolicy cannot be specified with haPolicy.
            "connectionPersistenceOnUnhealthyBackends": "A String", # Specifies connection persistence when backends are unhealthy. The default
                # value is DEFAULT_FOR_PROTOCOL.
                #
                # If set to DEFAULT_FOR_PROTOCOL, the existing connections
                # persist on unhealthy backends only for connection-oriented protocols
                # (TCP and SCTP) and only if the Tracking Mode isPER_CONNECTION (default tracking mode) or the Session
                # Affinity is configured for 5-tuple. They do not persist forUDP.
                #
                # If set to NEVER_PERSIST, after a backend becomes unhealthy,
                # the existing connections on the unhealthy backend are never persisted on
                # the unhealthy backend. They are always diverted to newly selected healthy
                # backends (unless all backends are unhealthy).
                #
                # If set to ALWAYS_PERSIST, existing connections always
                # persist on unhealthy backends regardless of protocol and session
                # affinity. It is generally not recommended to use this mode overriding the
                # default.
                #
                # For more details, see [Connection Persistence for Network Load
                # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#connection-persistence)
                # and [Connection Persistence for Internal TCP/UDP Load
                # Balancing](https://cloud.google.com/load-balancing/docs/internal#connection-persistence).
            "enableStrongAffinity": True or False, # Enable Strong Session Affinity for external passthrough Network Load
                # Balancers. This option is not available publicly.
            "idleTimeoutSec": 42, # Specifies how long to keep a Connection Tracking entry while there is no
                # matching traffic (in seconds).
                #
                # For internal passthrough Network Load Balancers:
                #
                #    - The minimum (default) is 10 minutes and the maximum is 16 hours.
                #    - It can be set only if Connection Tracking is less than 5-tuple
                #    (i.e. Session Affinity is CLIENT_IP_NO_DESTINATION,CLIENT_IP or CLIENT_IP_PROTO, and Tracking
                #    Mode is PER_SESSION).
                #
                #
                #
                # For external passthrough Network Load Balancers the default is 60
                # seconds. This option is not available publicly.
            "trackingMode": "A String", # Specifies the key used for connection tracking. There are two
                # options:
                #
                #    - PER_CONNECTION: This is the default mode. The Connection
                #    Tracking is performed as per the Connection Key (default Hash Method) for
                #    the specific protocol.
                #    - PER_SESSION: The Connection Tracking is performed as per
                #    the configured Session Affinity. It matches the configured Session
                #    Affinity.
                #
                #
                #
                # For more details, see [Tracking Mode for Network Load
                # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#tracking-mode)
                # and [Tracking Mode for Internal TCP/UDP Load
                # Balancing](https://cloud.google.com/load-balancing/docs/internal#tracking-mode).
          },
          "consistentHash": { # This message defines settings for a consistent hash style load balancer. # Consistent Hash-based load balancing can be used to provide soft session
              # affinity based on HTTP headers, cookies or other properties. This load
              # balancing policy is applicable only for HTTP connections. The affinity to a
              # particular destination host will be lost when one or more hosts are
              # added/removed from the destination service. This field specifies parameters
              # that control consistent hashing. This field is only applicable whenlocalityLbPolicy is set to MAGLEV orRING_HASH.
              #
              # This field is applicable to either:
              #
              #    - A regional backend service with the service protocol set to HTTP,
              #    HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
              #    INTERNAL_MANAGED.
              #    - A global backend service with the
              #    load_balancing_scheme set to INTERNAL_SELF_MANAGED.
            "httpCookie": { # The information about the HTTP Cookie on which the hash function is based # Hash is based on HTTP Cookie. This field describes a HTTP cookie that will
                # be used as the hash key for the consistent hash load balancer. If the
                # cookie is not present, it will be generated. This field is applicable if
                # the sessionAffinity is set to HTTP_COOKIE.
                #
                # Not supported when the backend service is referenced by a URL map that is
                # bound to target gRPC proxy that has validateForProxyless field set to true.
                # for load balancing policies that use a consistent hash.
              "name": "A String", # Name of the cookie.
              "path": "A String", # Path to set for the cookie.
              "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
                  # as a count of seconds and fractions of seconds at nanosecond
                  # resolution. It is independent of any calendar and concepts like "day"
                  # or "month". Range is approximately 10,000 years.
                "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                    # Durations less than one second are represented with a 0
                    # `seconds` field and a positive `nanos` field. Must be from 0
                    # to 999,999,999 inclusive.
                "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                    # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                    # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
              },
            },
            "httpHeaderName": "A String", # The hash based on the value of the specified header field. This field is
                # applicable if the sessionAffinity is set toHEADER_FIELD.
            "minimumRingSize": "A String", # The minimum number of virtual nodes to use for the hash ring. Defaults to
                # 1024. Larger ring sizes result in more granular load distributions. If the
                # number of hosts in the load balancing pool is larger than the ring size,
                # each host will be assigned a single virtual node.
          },
          "creationTimestamp": "A String", # Output only. [Output Only] Creation timestamp inRFC3339
              # text format.
          "customMetrics": [ # List of custom metrics that are used for theWEIGHTED_ROUND_ROBIN locality_lb_policy.
            { # Custom Metrics are used for WEIGHTED_ROUND_ROBIN
                # locality_lb_policy.
              "dryRun": True or False, # If true, the metric data is not used for load balancing.
              "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
                  # long and match the regular expression
                  # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
                  # first character must be a lowercase letter, and all following
                  # characters must be a dash, period, underscore, lowercase letter, or
                  # digit, except the last character, which cannot be a dash, period, or
                  # underscore. For usage guidelines, see Custom Metrics balancing mode. This
                  # field can only be used for a global or regional backend service with the
                  # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
            },
          ],
          "customRequestHeaders": [ # Headers that the load balancer adds to proxied requests. See [Creating
              # custom
              # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
            "A String",
          ],
          "customResponseHeaders": [ # Headers that the load balancer adds to proxied responses. See [Creating
              # custom
              # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
            "A String",
          ],
          "description": "A String", # An optional description of this resource. Provide this property when you
              # create the resource.
          "dynamicForwarding": { # Defines a dynamic forwarding configuration for the backend service. # Dynamic forwarding configuration. This field is used to configure the
              # backend service with dynamic forwarding feature which together with Service
              # Extension allows customized and complex routing logic.
            "forwardProxy": { # Defines Dynamic Forwarding Proxy configuration. # Dynamic Forwarding Proxy configuration.
              "enabled": True or False, # A boolean flag enabling dynamic forwarding proxy.
              "proxyMode": "A String", # Determines the dynamic forwarding proxy mode.
            },
            "ipPortSelection": { # Defines a IP:PORT based dynamic forwarding configuration for the backend # IP:PORT based dynamic forwarding configuration.
                # service. Some ranges are restricted: Restricted
                # ranges.
              "enabled": True or False, # A boolean flag enabling IP:PORT based dynamic forwarding.
            },
          },
          "edgeSecurityPolicy": "A String", # [Output Only] The resource URL for the edge security policy associated with
              # this backend service.
          "enableCDN": True or False, # If true, enables Cloud CDN for the backend service of a
              # global external Application Load Balancer.
          "externalManagedMigrationState": "A String", # Specifies the canary migration state. Possible values are PREPARE,
              # TEST_BY_PERCENTAGE, and TEST_ALL_TRAFFIC.
              #
              # To begin the migration from EXTERNAL to EXTERNAL_MANAGED, the state must be
              # changed to PREPARE. The state must be changed to TEST_ALL_TRAFFIC before
              # the loadBalancingScheme can be changed to EXTERNAL_MANAGED. Optionally, the
              # TEST_BY_PERCENTAGE state can be used to migrate traffic by percentage using
              # externalManagedMigrationTestingPercentage.
              #
              # Rolling back a migration requires the states to be set in reverse order. So
              # changing the scheme from EXTERNAL_MANAGED to EXTERNAL requires the state to
              # be set to TEST_ALL_TRAFFIC at the same time. Optionally, the
              # TEST_BY_PERCENTAGE state can be used to migrate some traffic back to
              # EXTERNAL or PREPARE can be used to migrate all traffic back to EXTERNAL.
          "externalManagedMigrationTestingPercentage": 3.14, # Determines the fraction of requests that should be processed by the Global
              # external Application Load Balancer.
              #
              # The value of this field must be in the range [0, 100].
              #
              # Session affinity options will slightly affect this routing behavior, for
              # more details, see:Session
              # Affinity.
              #
              # This value can only be set if the loadBalancingScheme in the BackendService
              # is set to EXTERNAL (when using the classic Application Load Balancer) and
              # the migration state is TEST_BY_PERCENTAGE.
          "failoverPolicy": { # For load balancers that have configurable # Requires at least one backend instance group to be defined
              # as a backup (failover) backend.
              # For load balancers that have configurable failover:
              # [Internal passthrough Network Load
              # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
              # and [external passthrough Network Load
              # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
              #
              # failoverPolicy cannot be specified with haPolicy.
              # failover:
              # [Internal passthrough Network Load
              # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
              # and [external passthrough
              # Network Load
              # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
              # On failover or failback, this field indicates whether connection draining
              # will be honored. Google Cloud has a fixed connection draining timeout of
              # 10 minutes. A setting of true terminates existing TCP
              # connections to the active pool during failover and failback, immediately
              # draining traffic. A setting of false allows existing TCP
              # connections to persist, even on VMs no longer in the active pool, for up
              # to the duration of the connection draining timeout (10 minutes).
            "disableConnectionDrainOnFailover": True or False, # This can be set to true if the protocol isTCP, UDP, or UNSPECIFIED.
                #
                # The default is false.
            "dropTrafficIfUnhealthy": True or False, # If set to true, connections to the
                # load balancer are dropped when all primary and all backup backend VMs are
                # unhealthy.If set to false, connections are distributed
                # among all primary VMs when all primary and all backup backend VMs are
                #  unhealthy.
                # For load balancers that have configurable
                # failover:
                # [Internal passthrough
                # Network Load
                # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
                # and [external passthrough
                # Network Load
                # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
                # The default is false.
            "failoverRatio": 3.14, # The value of the field must be in the range[0, 1]. If the value is 0, the load balancer performs a
                # failover when the number of healthy primary VMs equals zero.
                # For all other values, the load balancer performs a failover when the
                # total number of healthy primary VMs is less than this ratio.
                # For load balancers that have configurable
                # failover:
                # [Internal TCP/UDP Load
                # Balancing](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
                # and [external TCP/UDP Load
                # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
          },
          "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object.
              # This field is used in optimistic locking. This field will be ignored when
              # inserting a BackendService. An up-to-date fingerprint must be provided in
              # order to update the BackendService, otherwise the request will
              # fail with error 412 conditionNotMet.
              #
              # To see the latest fingerprint, make a get() request to
              # retrieve a BackendService.
          "haPolicy": { # Configures self-managed High Availability (HA) for External and Internal
              # Protocol Forwarding.
              #
              # The backends of this regional backend service must only specify zonal
              # network endpoint groups (NEGs) of type GCE_VM_IP.
              #
              # When haPolicy is set for an Internal Passthrough Network Load Balancer, the
              # regional backend service must set the network field. All zonal NEGs must
              # belong to the same network. However, individual NEGs can
              # belong to different subnetworks of that network.
              #
              # When haPolicy is specified, the set of attached network endpoints across
              # all backends comprise an High Availability domain from which one endpoint
              # is selected as the active endpoint (the leader) that receives all
              # traffic.
              #
              # haPolicy can be added only at backend service creation time. Once set up,
              # it cannot be deleted.
              #
              # Note that haPolicy is not for load balancing, and therefore cannot be
              # specified with sessionAffinity, connectionTrackingPolicy, and
              # failoverPolicy.
              #
              # haPolicy requires customers to be responsible for tracking backend
              # endpoint health and electing a leader among the healthy endpoints.
              # Therefore, haPolicy cannot be specified with healthChecks.
              #
              # haPolicy can only be specified for External Passthrough Network Load
              # Balancers and Internal Passthrough Network Load Balancers.
            "fastIPMove": "A String", # Specifies whether fast IP move is enabled, and if so, the mechanism to
                # achieve it.
                #
                # Supported values are:
                #
                #    - DISABLED: Fast IP Move is disabled. You can only use the
                #    haPolicy.leader API to update the leader.
                #    - >GARP_RA: Provides a method to very quickly define a new network
                #    endpoint as the leader. This method is faster than updating the leader
                #    using the haPolicy.leader API. Fast IP move works as follows: The VM
                #    hosting the network endpoint that should become the new leader sends
                #    either a Gratuitous ARP (GARP) packet (IPv4) or an ICMPv6 Router
                #    Advertisement(RA) packet (IPv6).  Google Cloud immediately but
                #    temporarily associates the forwarding rule IP address with that VM, and
                #    both new and in-flight packets are quickly delivered to that VM.
                #
                #
                #
                # Note the important properties of the Fast IP Move functionality:
                #
                #    - The GARP/RA-initiated re-routing stays active for approximately 20
                #    minutes. After triggering fast failover, you must also
                #    appropriately set the haPolicy.leader.
                #    -  The new leader instance should continue to send GARP/RA packets
                #    periodically every 10 seconds until at least 10 minutes after updating
                #    the haPolicy.leader (but stop immediately if it is no longer the leader).
                #    - After triggering a fast failover, we recommend that you wait at least
                #    3 seconds before sending another GARP/RA packet from a different VM
                #    instance to avoid race conditions.
                #    - Don't send GARP/RA packets from different VM
                #    instances at the same time. If multiple instances continue to send
                #    GARP/RA packets, traffic might be routed to different destinations in an
                #    alternating order. This condition ceases when a single instance
                #    issues a GARP/RA packet.
                #    - The GARP/RA request always takes priority over the leader API.
                #    Using the haPolicy.leader API to change the leader to a different
                #    instance will have no effect until the GARP/RA request becomes
                #    inactive.
                #    - The GARP/RA packets should follow the GARP/RA
                #    Packet Specifications..
                #    -  When multiple forwarding rules refer to a regional backend service,
                #    you need only send a GARP or RA packet for a single forwarding rule
                #    virtual IP. The virtual IPs for all forwarding rules targeting the same
                #    backend service will also be moved to the sender of the GARP or RA
                #    packet.
                #
                #
                #
                # The following are the Fast IP Move limitations (that is, when fastIPMove
                # is not DISABLED):
                #
                #    - Multiple forwarding rules cannot use the same IP address if one of
                #    them refers to a regional backend service with fastIPMove.
                #    - The regional backend service must set the network field, and all
                #    NEGs must belong to that network. However, individual
                #    NEGs can belong to different subnetworks of that network.
                #    - The maximum number of network endpoints across all backends of a
                #    backend service with fastIPMove is 32.
                #    - The maximum number of backend services with fastIPMove that can have
                #    the same network endpoint attached to one of its backends is 64.
                #    - The maximum number of backend services with fastIPMove in a VPC in a
                #    region is 64.
                #    - The network endpoints that are attached to a backend of a backend
                #    service with fastIPMove cannot resolve to Gen3+ machines for IPv6.
                #    - Traffic directed to the leader by a static route next hop will not be
                #    redirected to a new leader by fast failover. Such traffic will only be
                #    redirected once an haPolicy.leader update has taken effect. Only traffic
                #    to the forwarding rule's virtual IP will be redirected to a new leader by
                #    fast failover.
                #
                #
                # haPolicy.fastIPMove can be set only at backend service creation time.
                # Once set, it cannot be updated.
                #
                # By default, fastIpMove is set to DISABLED.
            "leader": { # Selects one of the network endpoints attached to the backend NEGs of
                # this service as the active endpoint (the leader) that receives all
                # traffic.
                #
                # When the leader changes, there is no connection draining to persist
                # existing connections on the old leader.
                #
                # You are responsible for selecting a suitable endpoint as the
                # leader. For example, preferring a healthy endpoint over unhealthy ones.
                # Note that this service does not track backend endpoint health, and
                # selects the configured leader unconditionally.
              "backendGroup": "A String", # A fully-qualified URL (starting with https://www.googleapis.com/)
                  # of the zonal Network Endpoint Group (NEG) with `GCE_VM_IP` endpoints
                  # that the leader is attached to.
                  #
                  # The leader's backendGroup must already be specified as a backend of
                  # this backend service. Removing a backend that is designated as the
                  # leader's backendGroup is not permitted.
              "networkEndpoint": { # The network endpoint within the leader.backendGroup that is
                  # designated as the leader.
                  #
                  # This network endpoint cannot be detached from the NEG specified in
                  # the haPolicy.leader.backendGroup until the leader is updated with
                  # another network endpoint, or the leader is removed from the haPolicy.
                "instance": "A String", # The name of the VM instance of the leader network endpoint. The
                    # instance must already be attached to the NEG specified in the
                    # haPolicy.leader.backendGroup.
                    #
                    # The name must be 1-63 characters long, and comply with RFC1035.
                    # Authorization requires the following IAM permission on the
                    # specified resource instance: compute.instances.use
              },
            },
          },
          "healthChecks": [ # The list of URLs to the healthChecks, httpHealthChecks (legacy), or
              # httpsHealthChecks (legacy) resource for health checking this backend
              # service. Not all backend services support legacy health checks. See
              # Load balancer guide. Currently, at most one health check can be
              # specified for each backend service. Backend services with
              # instance group or zonal NEG backends must have a health check unless
              # haPolicy is specified. Backend services with internet or serverless NEG
              # backends must not have a health check.
              #
              # healthChecks[] cannot be specified with haPolicy.
            "A String",
          ],
          "iap": { # Identity-Aware Proxy # The configurations for Identity-Aware Proxy on this resource.
              # Not available for internal passthrough Network Load Balancers and external
              # passthrough Network Load Balancers.
            "enabled": True or False, # Whether the serving infrastructure will authenticate and authorize all
                # incoming requests.
            "oauth2ClientId": "A String", # OAuth2 client ID to use for the authentication flow.
            "oauth2ClientSecret": "A String", # OAuth2 client secret to use for the authentication flow.
                # For security reasons, this value cannot be retrieved via the API.
                # Instead, the SHA-256 hash of the value is returned in the
                # oauth2ClientSecretSha256 field.
                #
                # @InputOnly
            "oauth2ClientSecretSha256": "A String", # Output only. [Output Only] SHA256 hash value for the field oauth2_client_secret above.
          },
          "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is
              # defined by the server.
          "ipAddressSelectionPolicy": "A String", # Specifies a preference for traffic sent from the proxy to the backend (or
              # from the client to the backend for proxyless gRPC).
              # The possible values are:
              #
              #    - IPV4_ONLY: Only send IPv4 traffic to the backends of the
              #    backend service (Instance Group, Managed Instance Group, Network Endpoint
              #    Group), regardless of traffic from the client to the proxy. Only IPv4
              #    health checks are used to check the health of the backends. This is the
              #    default setting.
              #    - PREFER_IPV6: Prioritize the connection to the endpoint's
              #    IPv6 address over its IPv4 address (provided there is a healthy IPv6
              #    address).
              #    - IPV6_ONLY: Only send IPv6 traffic to the backends of the
              #    backend service (Instance Group, Managed Instance Group, Network Endpoint
              #    Group), regardless of traffic from the client to the proxy. Only IPv6
              #    health checks are used to check the health of the backends.
              #
              #
              #
              # This field is applicable to either:
              #
              #    -  Advanced global external Application Load Balancer (load balancing
              #    scheme EXTERNAL_MANAGED),
              #    -  Regional external Application Load
              #    Balancer,
              #    -  Internal proxy Network Load Balancer (load balancing
              #    scheme INTERNAL_MANAGED),
              #    -  Regional internal Application Load
              #    Balancer (load balancing scheme INTERNAL_MANAGED),
              #    -  Traffic
              #    Director with Envoy proxies and proxyless gRPC (load balancing scheme
              #    INTERNAL_SELF_MANAGED).
          "kind": "compute#backendService", # Output only. [Output Only] Type of resource. Always compute#backendService
              # for backend services.
          "loadBalancingScheme": "A String", # Specifies the load balancer type. A backend service
              # created for one type of load balancer cannot be used with another.
              # For more information, refer toChoosing
              # a load balancer.
          "localityLbPolicies": [ # A list of locality load-balancing policies to be used in order of
              # preference. When you use localityLbPolicies, you must set at least one
              # value for either the localityLbPolicies[].policy or the
              # localityLbPolicies[].customPolicy field. localityLbPolicies overrides any
              # value set in the localityLbPolicy field.
              #
              # For an example of how to use this field, seeDefine
              # a list of preferred policies.
              #
              # Caution: This field and its children are intended for use in a service mesh
              # that includes gRPC clients only. Envoy proxies can't use backend services
              # that have this configuration.
            { # Container for either a built-in LB policy supported by gRPC or Envoy or
                # a custom one implemented by the end user.
              "customPolicy": { # The configuration for a custom policy implemented by the user and
                  # deployed with the client.
                "data": "A String", # An optional, arbitrary JSON object with configuration data, understood
                    # by a locally installed custom policy implementation.
                "name": "A String", # Identifies the custom policy.
                    #
                    # The value should match the name of a custom implementation registered
                    # on the gRPC clients. It should follow protocol buffer message naming
                    # conventions and include the full path (for example,
                    # myorg.CustomLbPolicy). The maximum length is 256 characters.
                    #
                    # Do not specify the same custom policy more than once for a
                    # backend. If you do, the configuration is rejected.
                    #
                    # For an example of how to use this field, seeUse
                    # a custom policy.
              },
              "policy": { # The configuration for a built-in load balancing policy.
                "name": "A String", # The name of a locality load-balancing policy. Valid values include
                    # ROUND_ROBIN and, for Java clients, LEAST_REQUEST. For information
                    # about these values, see the description of localityLbPolicy.
                    #
                    # Do not specify the same policy more than once for a
                    # backend. If you do, the configuration is rejected.
              },
            },
          ],
          "localityLbPolicy": "A String", # The load balancing algorithm used within the scope of the locality. The
              # possible values are:
              #
              #    - ROUND_ROBIN: This is a simple policy in which each healthy
              #    backend is selected in round robin order. This is the default.
              #    - LEAST_REQUEST: An O(1) algorithm which
              #    selects two random healthy hosts and picks the host which has fewer active
              #    requests.
              #    - RING_HASH: The ring/modulo hash load balancer implements
              #    consistent hashing to backends. The algorithm has the property that the
              #    addition/removal of a host from a set of N hosts only affects 1/N of the
              #    requests.
              #    - RANDOM: The load balancer selects a random healthy
              #    host.
              #    - ORIGINAL_DESTINATION: Backend host is selected
              #    based on the client connection metadata, i.e., connections are opened to
              #    the same address as the destination address of the incoming connection
              #    before the connection was redirected to the load balancer.
              #    - MAGLEV: used as a drop in replacement for the ring hash
              #    load balancer. Maglev is not as stable as ring hash but has faster table
              #    lookup build times and host selection times. For more information about
              #    Maglev, see Maglev:
              #    A Fast and Reliable Software Network Load Balancer.
              #    - WEIGHTED_ROUND_ROBIN: Per-endpoint Weighted Round Robin
              #    Load Balancing using weights computed from Backend reported Custom Metrics.
              #    If set, the Backend Service responses are expected to contain non-standard
              #    HTTP response header field Endpoint-Load-Metrics. The reported
              #    metrics to use for computing the weights are specified via thecustomMetrics field.
              #
              #    This field is applicable to either:
              #       - A regional backend service with the service protocol set to HTTP,
              #       HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
              #       INTERNAL_MANAGED.
              #       - A global backend service with the
              #       load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or
              #       EXTERNAL_MANAGED.
              #
              #
              #    If sessionAffinity is not configured—that is, if session
              #    affinity remains at the default value of NONE—then the
              #    default value for localityLbPolicy
              #    is ROUND_ROBIN. If session affinity is set to a value other
              #    than NONE,
              #    then the default value for localityLbPolicy isMAGLEV.
              #
              #    Only ROUND_ROBIN and RING_HASH are supported
              #    when the backend service is referenced by a URL map that is bound to
              #    target gRPC proxy that has validateForProxyless field set to true.
              #
              #    localityLbPolicy cannot be specified with haPolicy.
          "logConfig": { # The available logging options for the load balancer traffic served by this # This field denotes the logging options for the load balancer traffic served
              # by this backend service. If logging is enabled, logs will be exported to
              # Stackdriver.
              # backend service.
            "enable": True or False, # Denotes whether to enable logging for the load balancer
                # traffic served by this backend service. The default value is false.
            "optionalFields": [ # This field can only be specified if logging is enabled for this backend
                # service and "logConfig.optionalMode" was set to CUSTOM. Contains a list
                # of optional fields you want to include in the logs. For example:
                # serverInstance, serverGkeDetails.cluster,
                # serverGkeDetails.pod.podNamespace
              "A String",
            ],
            "optionalMode": "A String", # This field can only be specified if logging is enabled for this backend
                # service. Configures whether all, none or a subset of optional fields
                # should be added to the reported logs. One of [INCLUDE_ALL_OPTIONAL,
                # EXCLUDE_ALL_OPTIONAL, CUSTOM]. Default is EXCLUDE_ALL_OPTIONAL.
            "sampleRate": 3.14, # This field can only be specified if logging is enabled for this backend
                # service. The value of the field must be in [0, 1]. This configures the
                # sampling rate of requests to the load balancer where 1.0 means all logged
                # requests are reported and 0.0 means no logged requests are reported. The
                # default value is 1.0.
          },
          "maxStreamDuration": { # A Duration represents a fixed-length span of time represented # Specifies the default maximum duration (timeout) for streams to this
              # service. Duration is computed from the beginning of the stream until the
              # response has been completely processed, including all retries. A stream
              # that does not complete in this duration is closed.
              #
              # If not specified, there will be no timeout limit, i.e. the maximum
              # duration is infinite.
              #
              # This value can be overridden in the PathMatcher configuration of the
              # UrlMap that references this backend service.
              #
              # This field is only allowed when the loadBalancingScheme of
              # the backend service is INTERNAL_SELF_MANAGED.
              # as a count of seconds and fractions of seconds at nanosecond
              # resolution. It is independent of any calendar and concepts like "day"
              # or "month". Range is approximately 10,000 years.
            "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                # Durations less than one second are represented with a 0
                # `seconds` field and a positive `nanos` field. Must be from 0
                # to 999,999,999 inclusive.
            "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
          },
          "metadatas": { # Deployment metadata associated with the resource to be set by a GKE hub
              # controller and read by the backend RCTH
            "a_key": "A String",
          },
          "name": "A String", # Name of the resource. Provided by the client when the resource is created.
              # The name must be 1-63 characters long, and comply withRFC1035.
              # Specifically, the name must be 1-63 characters long and match the regular
              # expression `[a-z]([-a-z0-9]*[a-z0-9])?` which means the first
              # character must be a lowercase letter, and all following characters must
              # be a dash, lowercase letter, or digit, except the last character, which
              # cannot be a dash.
          "network": "A String", # The URL of the network to which this backend service belongs.
              #
              # This field must be set for Internal Passthrough Network Load Balancers when
              # the haPolicy is enabled, and for External Passthrough Network Load
              # Balancers when the haPolicy fastIpMove is enabled.
              #
              # This field can only be specified when the load balancing scheme is set toINTERNAL, or when the load balancing scheme is set toEXTERNAL and haPolicy fastIpMove is enabled.
          "networkPassThroughLbTrafficPolicy": { # Configures traffic steering properties of internal passthrough Network
              # Load Balancers.
              #
              # networkPassThroughLbTrafficPolicy cannot be specified with haPolicy.
            "zonalAffinity": { # When configured, new connections are load balanced across healthy backend
                # endpoints in the local zone.
              "spillover": "A String", # This field indicates whether zonal affinity is enabled or not. The
                  # possible values are:
                  #
                  #    - ZONAL_AFFINITY_DISABLED: Default Value. Zonal Affinity
                  #    is disabled. The load balancer distributes new connections to all
                  #    healthy backend endpoints across all zones.
                  #    - ZONAL_AFFINITY_STAY_WITHIN_ZONE: Zonal Affinity is
                  #    enabled. The load balancer distributes new connections to all healthy
                  #    backend endpoints in the local zone only. If there are no healthy
                  #    backend endpoints in the local zone, the load balancer distributes
                  #    new connections to all backend endpoints in the local zone.
                  #    - ZONAL_AFFINITY_SPILL_CROSS_ZONE: Zonal Affinity is
                  #    enabled. The load balancer distributes new connections to all healthy
                  #    backend endpoints in the local zone only. If there aren't enough
                  #    healthy backend endpoints in the local zone, the load balancer
                  #    distributes new connections to all healthy backend endpoints across all
                  #    zones.
              "spilloverRatio": 3.14, # The value of the field must be in [0, 1]. When the ratio of the count
                  # of healthy backend endpoints in a zone to the count of backend
                  # endpoints in that same zone is equal to or above this threshold, the
                  # load balancer distributes new connections to all healthy endpoints in
                  # the local zone only. When the ratio of the count of healthy backend
                  # endpoints in a zone to the count of backend endpoints in that same
                  # zone is below this threshold, the load balancer distributes all new
                  # connections to all healthy endpoints across all zones.
            },
          },
          "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend service.
              # the backend service.
            "resourceUri": "A String", # The resource URI of the resource or system that manages the backend
                # service.
          },
          "outlierDetection": { # Settings controlling the eviction of unhealthy hosts from the load balancing # Settings controlling the ejection of unhealthy backend endpoints from the
              # load balancing pool of each individual proxy instance that processes the
              # traffic for the given backend service. If not set, this feature is
              # considered disabled.
              #
              # Results of the outlier detection algorithm (ejection of endpoints from the
              # load balancing pool and returning them back to the pool) are executed
              # independently by each proxy instance of the load balancer. In most cases,
              # more than one proxy instance handles the traffic received by a backend
              # service. Thus, it is possible that an unhealthy endpoint is detected and
              # ejected by only some of the proxies, and while this happens, other proxies
              # may continue to send requests to the same unhealthy endpoint until they
              # detect and eject the unhealthy endpoint.
              #
              # Applicable backend endpoints can be:
              #
              #    - VM instances in an Instance Group
              #    - Endpoints in a Zonal NEG (GCE_VM_IP, GCE_VM_IP_PORT)
              #    - Endpoints in a Hybrid Connectivity NEG (NON_GCP_PRIVATE_IP_PORT)
              #    - Serverless NEGs, that resolve to Cloud Run, App Engine, or Cloud
              #    Functions Services
              #    - Private Service Connect NEGs, that resolve to
              #    Google-managed regional API endpoints or managed services published using
              #    Private Service Connect
              #
              #
              #
              # Applicable backend service types can be:
              #
              #    - A global backend service with the loadBalancingScheme set to
              #    INTERNAL_SELF_MANAGED or EXTERNAL_MANAGED.
              #    - A regional backend
              #    service with the service protocol set to HTTP, HTTPS, HTTP2 or H2C, and
              #    loadBalancingScheme set to INTERNAL_MANAGED or EXTERNAL_MANAGED. Not
              #    supported for Serverless NEGs.
              #
              #
              #
              # Not supported when the backend service is referenced by a URL map that is
              # bound to target gRPC proxy that has validateForProxyless field set to true.
              # pool for the backend service.
            "baseEjectionTime": { # A Duration represents a fixed-length span of time represented # The base time that a backend endpoint is ejected for. Defaults to 30000ms
                # or 30s.
                #
                # After a backend endpoint is returned back to the load balancing pool, it
                # can be ejected again in another ejection analysis. Thus, the total ejection
                # time is equal to the base ejection time multiplied by the number of times
                # the backend endpoint has been ejected. Defaults to 30000ms or 30s.
                # as a count of seconds and fractions of seconds at nanosecond
                # resolution. It is independent of any calendar and concepts like "day"
                # or "month". Range is approximately 10,000 years.
              "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                  # Durations less than one second are represented with a 0
                  # `seconds` field and a positive `nanos` field. Must be from 0
                  # to 999,999,999 inclusive.
              "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                  # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                  # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
            },
            "consecutiveErrors": 42, # Number of consecutive errors before a backend endpoint is ejected from the
                # load balancing pool. When the backend endpoint is accessed over HTTP, a 5xx
                # return code qualifies as an error. Defaults to 5.
            "consecutiveGatewayFailure": 42, # The number of consecutive gateway failures (502, 503, 504 status or
                # connection errors that are mapped to one of those status codes) before a
                # consecutive gateway failure ejection occurs. Defaults to 3.
            "enforcingConsecutiveErrors": 42, # The percentage chance that a backend endpoint will be ejected when an
                # outlier status is detected through consecutive 5xx. This setting can be
                # used to disable ejection or to ramp it up slowly. Defaults to 0.
            "enforcingConsecutiveGatewayFailure": 42, # The percentage chance that a backend endpoint will be ejected when an
                # outlier status is detected through consecutive gateway failures. This
                # setting can be used to disable ejection or to ramp it up slowly. Defaults
                # to 100.
            "enforcingSuccessRate": 42, # The percentage chance that a backend endpoint will be ejected when an
                # outlier status is detected through success rate statistics. This setting
                # can be used to disable ejection or to ramp it up slowly. Defaults to 100.
                #
                # Not supported when the backend service uses Serverless NEG.
            "interval": { # A Duration represents a fixed-length span of time represented # Time interval between ejection analysis sweeps. This can result in both new
                # ejections and backend endpoints being returned to service. The interval is
                # equal to the number of seconds as defined in
                # outlierDetection.interval.seconds plus the number of nanoseconds as defined
                # in outlierDetection.interval.nanos. Defaults to 1 second.
                # as a count of seconds and fractions of seconds at nanosecond
                # resolution. It is independent of any calendar and concepts like "day"
                # or "month". Range is approximately 10,000 years.
              "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                  # Durations less than one second are represented with a 0
                  # `seconds` field and a positive `nanos` field. Must be from 0
                  # to 999,999,999 inclusive.
              "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                  # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                  # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
            },
            "maxEjectionPercent": 42, # Maximum percentage of backend endpoints in the load balancing pool for the
                # backend service that can be ejected if the ejection conditions are met.
                # Defaults to 50%.
            "successRateMinimumHosts": 42, # The number of backend endpoints in the load balancing pool that must have
                # enough request volume to detect success rate outliers. If the number of
                # backend endpoints is fewer than this setting, outlier detection via success
                # rate statistics is not performed for any backend endpoint in the load
                # balancing pool. Defaults to 5.
                #
                # Not supported when the backend service uses Serverless NEG.
            "successRateRequestVolume": 42, # The minimum number of total requests that must be collected in one interval
                # (as defined by the interval duration above) to include this backend
                # endpoint in success rate based outlier detection. If the volume is lower
                # than this setting, outlier detection via success rate statistics is not
                # performed for that backend endpoint. Defaults to 100.
                #
                # Not supported when the backend service uses Serverless NEG.
            "successRateStdevFactor": 42, # This factor is used to determine the ejection threshold for success rate
                # outlier ejection. The ejection threshold is the difference between the mean
                # success rate, and the product of this factor and the standard deviation of
                # the mean success rate: mean - (stdev * successRateStdevFactor). This factor
                # is divided by a thousand to get a double. That is, if the desired factor
                # is 1.9, the runtime value should be 1900. Defaults to 1900.
                #
                # Not supported when the backend service uses Serverless NEG.
          },
          "params": { # Additional Backend Service parameters. # Input only. [Input Only] Additional params passed with the request, but not persisted
              # as part of resource payload.
            "resourceManagerTags": { # Tag keys/values directly bound to this resource.
                # Tag keys and values have the same definition as resource
                # manager tags. The field is allowed for INSERT
                # only. The keys/values to set on the resource should be specified in
                # either ID { : } or Namespaced format
                # { : }.
                # For example the following are valid inputs:
                # * {"tagKeys/333" : "tagValues/444", "tagKeys/123" : "tagValues/456"}
                # * {"123/environment" : "production", "345/abc" : "xyz"}
                # Note:
                # * Invalid combinations of ID & namespaced format is not supported. For
                #   instance: {"123/environment" : "tagValues/444"} is invalid.
              "a_key": "A String",
            },
          },
          "port": 42, # Deprecated in favor of portName. The TCP port to connect on
              # the backend. The default value is 80.
              # For internal passthrough Network Load Balancers and external passthrough
              # Network Load Balancers, omit port.
          "portName": "A String", # A named port on a backend instance group representing the port for
              # communication to the backend VMs in that group. The
              # named port must be [defined on each backend instance
              # group](https://cloud.google.com/load-balancing/docs/backend-service#named_ports).
              # This parameter has no meaning if the backends are NEGs. For internal
              # passthrough Network Load Balancers and external passthrough Network Load
              # Balancers, omit port_name.
          "protocol": "A String", # The protocol this BackendService uses to communicate
              # with backends.
              #
              # Possible values are HTTP, HTTPS, HTTP2, H2C, TCP, SSL, UDP or GRPC.
              # depending on the chosen load balancer or Traffic Director configuration.
              # Refer to the documentation for the load balancers or for Traffic Director
              # for more information.
              #
              # Must be set to GRPC when the backend service is referenced by a URL map
              # that is bound to target gRPC proxy.
          "region": "A String", # Output only. [Output Only] URL of the region where the regional backend service
              # resides. This field is not applicable to global backend services.
              # You must specify this field as part of the HTTP request URL. It is
              # not settable as a field in the request body.
          "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this
              # backend service.
          "securitySettings": { # The authentication and authorization settings for a BackendService. # This field specifies the security settings that apply to this backend
              # service. This field is applicable to a global backend service with the
              # load_balancing_scheme set to INTERNAL_SELF_MANAGED.
            "authentication": "A String", # [Deprecated] Use clientTlsPolicy instead.
            "awsV4Authentication": { # Contains the configurations necessary to generate a signature for access to # The configuration needed to generate a signature for access to private
                # storage buckets that support AWS's Signature Version 4 for authentication.
                # Allowed only for INTERNET_IP_PORT and INTERNET_FQDN_PORT NEG backends.
                # private storage buckets that support Signature Version 4 for authentication.
                # The service name for generating the authentication header will always default
                # to 's3'.
              "accessKey": "A String", # The access key used for s3 bucket authentication. Required for updating or
                  # creating a backend that uses AWS v4 signature authentication, but will not
                  # be returned as part of the configuration when queried with a REST API GET
                  # request.
                  #
                  # @InputOnly
              "accessKeyId": "A String", # The identifier of an access key used for s3 bucket authentication.
              "accessKeyVersion": "A String", # The optional version identifier for the access key. You can use this to
                  # keep track of different iterations of your access key.
              "originRegion": "A String", # The name of the cloud region of your origin. This is a free-form field with
                  # the name of the region your cloud uses to host your origin.  For example,
                  # "us-east-1" for AWS or "us-ashburn-1" for OCI.
            },
            "clientTlsPolicy": "A String", # Optional. A URL referring to a networksecurity.ClientTlsPolicy resource
                # that describes how clients should authenticate with this service's
                # backends.
                #
                #  clientTlsPolicy only applies to a globalBackendService with the loadBalancingScheme set
                # to INTERNAL_SELF_MANAGED.
                #
                #  If left blank, communications are not encrypted.
            "subjectAltNames": [ # Optional. A list of Subject Alternative Names (SANs) that the client
                # verifies during a mutual TLS handshake with an server/endpoint for thisBackendService. When the server presents its X.509 certificate
                # to the client, the client inspects the certificate'ssubjectAltName field. If the field contains one of the
                # specified values, the communication continues. Otherwise, it fails. This
                # additional check enables the client to verify that the server is authorized
                # to run the requested service.
                #
                #  Note that the contents of the server
                # certificate's subjectAltName field are configured by the
                # Public Key Infrastructure which provisions server identities.
                #
                #  Only applies to a global BackendService withloadBalancingScheme set to INTERNAL_SELF_MANAGED.
                # Only applies when BackendService has an attachedclientTlsPolicy with clientCertificate (mTLS
                # mode).
              "A String",
            ],
          },
          "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
          "serviceBindings": [ # URLs of networkservices.ServiceBinding resources.
              #
              # Can only be set if load balancing scheme is INTERNAL_SELF_MANAGED.
              # If set, lists of backends and health checks must be both empty.
            "A String",
          ],
          "serviceLbPolicy": "A String", # URL to networkservices.ServiceLbPolicy resource.
              #
              # Can only be set if load balancing scheme is EXTERNAL_MANAGED,
              # INTERNAL_MANAGED or INTERNAL_SELF_MANAGED and the scope is global.
          "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
              #
              # Only NONE and HEADER_FIELD are supported
              # when the backend service is referenced by a URL map that is bound to
              # target gRPC proxy that has validateForProxyless field set to true.
              #
              # For more details, see:
              # [Session
              # Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity).
              #
              # sessionAffinity cannot be specified with haPolicy.
          "strongSessionAffinityCookie": { # The HTTP cookie used for stateful session affinity. # Describes the HTTP cookie used for stateful session affinity. This field is
              # applicable and required if the sessionAffinity is set toSTRONG_COOKIE_AFFINITY.
            "name": "A String", # Name of the cookie.
            "path": "A String", # Path to set for the cookie.
            "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
                # as a count of seconds and fractions of seconds at nanosecond
                # resolution. It is independent of any calendar and concepts like "day"
                # or "month". Range is approximately 10,000 years.
              "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                  # Durations less than one second are represented with a 0
                  # `seconds` field and a positive `nanos` field. Must be from 0
                  # to 999,999,999 inclusive.
              "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                  # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                  # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
            },
          },
          "subsetting": { # Subsetting configuration for this BackendService. # subsetting cannot be specified with haPolicy.
              # Currently this is applicable only for Internal TCP/UDP load balancing,
              # Internal HTTP(S) load balancing and Traffic Director.
            "policy": "A String",
            "subsetSize": 42, # The number of backends per backend group assigned to each proxy instance or
                # each service mesh client.
                #
                # An input parameter to the `CONSISTENT_HASH_SUBSETTING` algorithm.
                # Can only be set if `policy` is set to `CONSISTENT_HASH_SUBSETTING`.
                # Can only be set if load balancing scheme is `INTERNAL_MANAGED` or
                # `INTERNAL_SELF_MANAGED`.
                #
                # `subset_size` is optional for Internal HTTP(S) load balancing
                # and required for Traffic Director.
                #
                # If you do not provide this value, Cloud Load Balancing will calculate it
                # dynamically to optimize the number of proxies/clients visible to each
                # backend and vice versa.
                #
                # Must be greater than 0. If `subset_size` is larger than the number of
                # backends/endpoints, then subsetting is disabled.
          },
          "timeoutSec": 42, # The backend service timeout has a different meaning depending on the
              # type of load balancer. For more information see,
              # Backend service settings.
              # The default is 30 seconds.
              # The full range of timeout values allowed goes from 1
              # through 2,147,483,647 seconds.
              #
              # This value can be overridden in the PathMatcher configuration of the
              # UrlMap that references this backend service.
              #
              # Not supported when the backend service is referenced by a URL map that is
              # bound to target gRPC proxy that has validateForProxyless field set to true.
              # Instead, use maxStreamDuration.
          "tlsSettings": { # Configuration for Backend Authenticated TLS and mTLS. May only be specified
              # when the backend protocol is SSL, HTTPS or HTTP2.
            "authenticationConfig": "A String", # Reference to the BackendAuthenticationConfig resource from the
                # networksecurity.googleapis.com namespace. Can be used in authenticating
                # TLS connections to the backend, as specified by the authenticationMode
                # field. Can only be specified if authenticationMode is not NONE.
            "identity": "A String", # Assigns the Managed Identity for the BackendService Workload.
                #
                #
                # Use this property to configure the load balancer back-end to use
                # certificates and roots of trust provisioned by the Managed Workload
                # Identity system.
                #
                #  The `identity` property is the
                # fully-specified SPIFFE ID to use in the SVID presented by the Load
                # Balancer Workload.
                #
                #  The SPIFFE ID must be a resource starting with the
                # `trustDomain` property value, followed by the path to the Managed
                # Workload Identity.
                #
                #  Supported SPIFFE ID format:
                #
                #    - //<trust_domain>/ns/<namespace>/sa/<subject>
                #
                #
                # The Trust Domain within the Managed Identity must refer to a valid
                # Workload Identity Pool. The TrustConfig and CertificateIssuanceConfig
                # will be inherited from the Workload Identity Pool.
                #
                #  Restrictions:
                #
                #    - If you set the `identity` property, you cannot manually set
                #    the following fields:
                #        - tlsSettings.sni
                #       - tlsSettings.subjectAltNames
                #       - tlsSettings.authenticationConfig
                #
                #
                # When defining a `identity` for a RegionBackendServices, the
                # corresponding Workload Identity Pool must have a ca_pool
                # configured in the same region.
                #
                #  The system will set up a read-onlytlsSettings.authenticationConfig for the Managed Identity.
            "sni": "A String", # Server Name Indication - see RFC3546 section 3.1. If set, the load
                # balancer sends this string as the SNI hostname in the TLS connection to
                # the backend, and requires that this string match a Subject Alternative
                # Name (SAN) in the backend's server certificate. With a Regional Internet
                # NEG backend, if the SNI is specified here, the load balancer uses it
                # regardless of whether the Regional Internet NEG is specified with FQDN or
                # IP address and port. When both sni and subjectAltNames[] are specified,
                # the load balancer matches the backend certificate's SAN only to
                # subjectAltNames[].
            "subjectAltNames": [ # A list of Subject Alternative Names (SANs) that the Load Balancer
                # verifies during a TLS handshake with the backend. When the server
                # presents its X.509 certificate to the Load Balancer, the Load Balancer
                # inspects the certificate's SAN field, and requires that at least one SAN
                # match one of the subjectAltNames in the list. This field is limited to 5
                # entries. When both sni and subjectAltNames[] are specified, the load
                # balancer matches the backend certificate's SAN only to subjectAltNames[].
              { # A Subject Alternative Name that the load balancer matches against the SAN
                  # field in the TLS certificate provided by the backend, specified as either
                  # a DNS name or a URI, in accordance with RFC 5280 4.2.1.6
                "dnsName": "A String", # The SAN specified as a DNS Name.
                "uniformResourceIdentifier": "A String", # The SAN specified as a URI.
              },
            ],
          },
          "usedBy": [ # Output only. [Output Only] List of resources referencing given backend service.
            {
              "reference": "A String", # Output only. [Output Only] Server-defined URL for resources referencing given
                  # BackendService like UrlMaps, TargetTcpProxies, TargetSslProxies
                  # and ForwardingRule.
            },
          ],
        },
      ],
      "kind": "compute#backendServiceList", # Output only. [Output Only] Type of resource. Alwayscompute#backendServiceList for lists of backend services.
      "nextPageToken": "A String", # [Output Only] This token allows you to get the next page of results for
          # list requests. If the number of results is larger thanmaxResults, use the nextPageToken as a value for
          # the query parameter pageToken in the next list request.
          # Subsequent list requests will have their own nextPageToken to
          # continue paging through the results.
      "selfLink": "A String", # Output only. [Output Only] Server-defined URL for this resource.
      "warning": { # [Output Only] Informational warning message.
        "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute
            # Engine returns NO_RESULTS_ON_PAGE if there
            # are no results in the response.
        "data": [ # [Output Only] Metadata about this warning in key:
            # value format. For example:
            #
            # "data": [
            #   {
            #    "key": "scope",
            #    "value": "zones/us-east1-d"
            #   }
          {
            "key": "A String", # [Output Only] A key that provides more detail on the warning being
                # returned. For example, for warnings where there are no results in a list
                # request for a particular zone, this key might be scope and
                # the key value might be the zone name. Other examples might be a key
                # indicating a deprecated resource and a suggested replacement, or a
                # warning about invalid network settings (for example, if an instance
                # attempts to perform IP forwarding but is not enabled for IP forwarding).
            "value": "A String", # [Output Only] A warning data value corresponding to the key.
          },
        ],
        "message": "A String", # [Output Only] A human-readable description of the warning code.
      },
    }

`listUsable(project, region, filter=None, maxResults=None, orderBy=None, pageToken=None, returnPartialSuccess=None, x__xgafv=None)`

    Retrieves a list of all usable backend services in the specified project in
    the given region.

    Args:
      project: string, Project ID for this request. (required)
      region: string, Name of the region scoping this request.
    It must be a string that meets the requirements in RFC1035. (required)
      filter: string, A filter expression that filters resources listed in the response. Most
    Compute resources support two types of filter expressions:
    expressions that support regular expressions and expressions that follow
    API improvement proposal AIP-160.
    These two types of filter expressions cannot be mixed in one request.

    If you want to use AIP-160, your expression must specify the field name, an
    operator, and the value that you want to use for filtering. The value
    must be a string, a number, or a boolean. The operator
    must be either `=`, `!=`, `>`, `<`, `<=`, `>=` or `:`.

    For example, if you are filtering Compute Engine instances, you can
    exclude instances named `example-instance` by specifying
    `name != example-instance`.

    The `:*` comparison can be used to test whether a key has been defined.
    For example, to find all objects with `owner` label use:
    ```
    labels.owner:*
    ```

    You can also filter nested fields. For example, you could specify
    `scheduling.automaticRestart = false` to include instances only
    if they are not scheduled for automatic restarts. You can use filtering
    on nested fields to filter based onresource labels.

    To filter on multiple expressions, provide each separate expression within
    parentheses. For example:
    ```
    (scheduling.automaticRestart = true)
    (cpuPlatform = "Intel Skylake")
    ```
    By default, each expression is an `AND` expression. However, you
    can include `AND` and `OR` expressions explicitly.
    For example:
    ```
    (cpuPlatform = "Intel Skylake") OR
    (cpuPlatform = "Intel Broadwell") AND
    (scheduling.automaticRestart = true)
    ```

    If you want to use a regular expression, use the `eq` (equal) or `ne`
    (not equal) operator against a single un-parenthesized expression with or
    without quotes or against multiple parenthesized expressions. Examples:

    `fieldname eq unquoted literal`
    `fieldname eq 'single quoted literal'`
    `fieldname eq "double quoted literal"`
    `(fieldname1 eq literal) (fieldname2 ne "literal")`

    The literal value is interpreted as a regular expression using GoogleRE2 library syntax.
    The literal value must match the entire field.

    For example, to filter for instances that do not end with name "instance",
    you would use `name ne .*instance`.

    You cannot combine constraints on multiple fields using regular
    expressions.
      maxResults: integer, The maximum number of results per page that should be returned.
    If the number of available results is larger than `maxResults`,
    Compute Engine returns a `nextPageToken` that can be used to get
    the next page of results in subsequent list requests. Acceptable values are
    `0` to `500`, inclusive. (Default: `500`)
      orderBy: string, Sorts list results by a certain order. By default, results
    are returned in alphanumerical order based on the resource name.

    You can also sort results in descending order based on the creation
    timestamp using `orderBy="creationTimestamp desc"`. This sorts
    results based on the `creationTimestamp` field in
    reverse chronological order (newest result first). Use this to sort
    resources like operations so that the newest operation is returned first.

    Currently, only sorting by `name` or
    `creationTimestamp desc` is supported.
      pageToken: string, Specifies a page token to use. Set `pageToken` to the
    `nextPageToken` returned by a previous list request to get
    the next page of results.
      returnPartialSuccess: boolean, Opt-in for partial success behavior which provides partial results in case
    of failure. The default value is false.

    For example, when partial success behavior is enabled, aggregatedList for a
    single zone scope either returns all resources in the zone or no resources,
    with an error code.
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Contains a list of usable BackendService resources.
      "id": "A String", # [Output Only] Unique identifier for the resource; defined by the server.
      "items": [ # A list of BackendService resources.
        { # Represents a Backend Service resource.
            #
            # A backend service defines how Google Cloud load balancers distribute traffic.
            # The backend service configuration contains a set of values, such as the
            # protocol used to connect to backends, various distribution and session
            # settings, health checks, and timeouts. These settings provide fine-grained
            # control over how your load balancer behaves. Most of the settings have
            # default values that allow for easy configuration if you need to get started
            # quickly.
            #
            # Backend services in Google Compute Engine can be either regionally or
            # globally scoped.
            #
            # * [Global](https://cloud.google.com/compute/docs/reference/rest/beta/backendServices)
            # * [Regional](https://cloud.google.com/compute/docs/reference/rest/beta/regionBackendServices)
            #
            # For more information, seeBackend
            # Services.
          "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds. This setting is applicable to Application
              # Load Balancers and Traffic Director and requires
              # GENERATED_COOKIE or HTTP_COOKIE session affinity.
              #
              # If set to 0, the cookie is non-persistent and lasts only until
              # the end of the browser session (or equivalent). The maximum allowed value
              # is two weeks (1,209,600).
              #
              # Not supported when the backend service is referenced by a URL map that is
              # bound to target gRPC proxy that has validateForProxyless field set to true.
          "backends": [ # The list of backends that serve this BackendService.
            { # Message containing information of one individual backend.
              "balancingMode": "A String", # Specifies how to determine whether the backend of a load balancer can
                  # handle additional traffic or is fully loaded. For usage guidelines, see
                  # Connection balancing mode.
                  #
                  # Backends must use compatible balancing modes. For more information, see
                  # Supported balancing modes and target capacity settings and
                  # Restrictions and guidance for instance groups.
                  #
                  # Note: Currently, if you use the API to configure incompatible balancing
                  # modes, the configuration might be accepted even though it has no impact
                  # and is ignored. Specifically, Backend.maxUtilization is ignored when
                  # Backend.balancingMode is RATE. In the future, this incompatible combination
                  # will be rejected.
              "capacityScaler": 3.14, # A multiplier applied to the backend's target capacity of its balancing
                  # mode.
                  # The default value is 1, which means the group serves up to
                  # 100% of its configured capacity (depending onbalancingMode). A setting of 0 means the group is
                  # completely drained, offering 0% of its available capacity. The valid ranges
                  # are 0.0 and [0.1,1.0].
                  # You cannot configure a setting larger than 0 and smaller than0.1.
                  # You cannot configure a setting of 0 when there is only one
                  # backend attached to the backend service.
                  #
                  # Not available with backends that don't support using abalancingMode. This includes backends such as global
                  # internet NEGs, regional serverless NEGs, and PSC NEGs.
              "customMetrics": [ # List of custom metrics that are used for CUSTOM_METRICS
                  # BalancingMode.
                { # Custom Metrics are used for CUSTOM_METRICS balancing_mode.
                  "dryRun": True or False, # If true, the metric data is collected and reported to Cloud
                      # Monitoring, but is not used for load balancing.
                  "maxUtilization": 3.14, # Optional parameter to define a target utilization for the Custom Metrics
                      # balancing mode. The valid range is [0.0, 1.0].
                  "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
                      # long and match the regular expression
                      # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
                      # first character must be a lowercase letter, and all following
                      # characters must be a dash, period, underscore, lowercase letter, or
                      # digit, except the last character, which cannot be a dash, period, or
                      # underscore. For usage guidelines, see Custom Metrics balancing mode. This
                      # field can only be used for a global or regional backend service with the
                      # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
                },
              ],
              "description": "A String", # An optional description of this resource. Provide this property when you
                  # create the resource.
              "failover": True or False, # This field designates whether this is a failover backend. More than one
                  # failover backend can be configured for a given BackendService.
              "group": "A String", # The fully-qualified URL of aninstance
                  # group or network endpoint
                  # group (NEG) resource. To determine what types of backends a load
                  # balancer supports, see the [Backend services
                  # overview](https://cloud.google.com/load-balancing/docs/backend-service#backends).
                  #
                  # You must use the *fully-qualified* URL (starting withhttps://www.googleapis.com/) to specify the instance group
                  # or NEG. Partial URLs are not supported.
                  #
                  # If haPolicy is specified, backends must refer to NEG resources of type
                  # GCE_VM_IP.
              "maxConnections": 42, # Defines a target maximum number of simultaneous connections. For usage
                  # guidelines, seeConnection
                  # balancing mode and Utilization
                  # balancing mode. Not available if the backend'sbalancingMode is RATE.
              "maxConnectionsPerEndpoint": 42, # Defines a target maximum number of simultaneous connections.  For usage
                  # guidelines, seeConnection
                  # balancing mode and Utilization
                  # balancing mode.
                  #
                  # Not available if the backend's balancingMode isRATE.
              "maxConnectionsPerInstance": 42, # Defines a target maximum number of simultaneous connections.
                  # For usage guidelines, seeConnection
                  # balancing mode and Utilization
                  # balancing mode.
                  #
                  # Not available if the backend's balancingMode isRATE.
              "maxInFlightRequests": 42, # Defines a maximum number of in-flight requests for the whole NEG or
                  # instance group. Not available if backend's balancingMode isRATE or CONNECTION.
              "maxInFlightRequestsPerEndpoint": 42, # Defines a maximum number of in-flight requests for a single endpoint.
                  # Not available if backend's balancingMode is RATE
                  # or CONNECTION.
              "maxInFlightRequestsPerInstance": 42, # Defines a maximum number of in-flight requests for a single VM.
                  # Not available if backend's balancingMode is RATE
                  # or CONNECTION.
              "maxRate": 42, # Defines a maximum number of HTTP requests per second (RPS). For
                  # usage guidelines, seeRate
                  # balancing mode and Utilization
                  # balancing mode.
                  #
                  # Not available if the backend's balancingMode isCONNECTION.
              "maxRatePerEndpoint": 3.14, # Defines a maximum target for requests per second (RPS). For usage
                  # guidelines, seeRate
                  # balancing mode and Utilization
                  # balancing mode.
                  #
                  # Not available if the backend's balancingMode isCONNECTION.
              "maxRatePerInstance": 3.14, # Defines a maximum target for requests per second (RPS). For usage
                  # guidelines, seeRate
                  # balancing mode and Utilization
                  # balancing mode.
                  #
                  # Not available if the backend's balancingMode isCONNECTION.
              "maxUtilization": 3.14, # Optional parameter to define a target capacity for theUTILIZATION balancing mode. The valid range is[0.0, 1.0].
                  #
                  # For usage guidelines, seeUtilization
                  # balancing mode.
              "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend.
                  # the backend.
                "resourceUri": "A String", # The URI of the resource or system that manages the backend.
              },
              "preference": "A String", # This field indicates whether this backend should be fully utilized before
                  # sending traffic to backends with default preference. The possible values
                  # are:
                  #
                  #    - PREFERRED: Backends with this preference level will be
                  #    filled up to their capacity limits first, based on RTT.
                  #    - DEFAULT:  If preferred backends don't have enough
                  #    capacity, backends in this layer would be used and traffic would be
                  #    assigned based on the load balancing algorithm you use. This is the
                  #    default
              "service": "A String", # Represents a service backend (e.g., Cloud Run service, PSC Service
                  # Attachment).
                  # e.g.
                  #  "run.googleapis.com/projects/123456789/locations/us-central1/services/my-service"
                  #  for Cloud Run service.
                  #  "compute.googleapis.com/projects/123456789/regions/us-central1/serviceAttachments/my-service-attachment"
                  #  for PSC Service Attachment.
              "trafficDuration": "A String",
            },
          ],
          "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService. Only available for
              # specified load balancer types.
            "bypassCacheOnRequestHeaders": [ # Bypass the cache when the specified request headers are matched - e.g.
                # Pragma or Authorization headers. Up to 5 headers can be specified.
                # The cache is bypassed for all cdnPolicy.cacheMode settings.
              { # Bypass the cache when the specified request headers are present,
                  # e.g. Pragma or Authorization headers. Values are case insensitive.
                  # The presence of such a header overrides the cache_mode setting.
                "headerName": "A String", # The header field name to match on when bypassing cache.
                    # Values are case-insensitive.
              },
            ],
            "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud # The CacheKeyPolicy for this CdnPolicy.
                # CDN.
              "includeHost": True or False, # If true, requests to different hosts will be cached separately.
              "includeHttpHeaders": [ # Allows HTTP request headers (by name) to be used in the cache key.
                "A String",
              ],
              "includeNamedCookies": [ # Allows HTTP cookies (by name) to be used in the cache key.
                  # The name=value pair will be used in the cache key Cloud CDN generates.
                "A String",
              ],
              "includeProtocol": True or False, # If true, http and https requests will be cached separately.
              "includeQueryString": True or False, # If true, include query string parameters in the cache key according to
                  # query_string_whitelist and query_string_blacklist. If neither is set, the
                  # entire query string will be included. If false, the query string will be
                  # excluded from the cache key entirely.
              "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other
                  # parameters will be included. Either specify query_string_whitelist or
                  # query_string_blacklist, not both. '&' and '=' will be percent encoded and
                  # not treated as delimiters.
                "A String",
              ],
              "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other
                  # parameters will be excluded. Either specify query_string_whitelist or
                  # query_string_blacklist, not both. '&' and '=' will be percent encoded and
                  # not treated as delimiters.
                "A String",
              ],
            },
            "cacheMode": "A String", # Specifies the cache setting for all responses from this backend.
                # The possible values are:USE_ORIGIN_HEADERS Requires the origin to set valid caching
                # headers to cache content. Responses without these headers will not be
                # cached at Google's edge, and will require a full trip to the origin on
                # every request, potentially impacting performance and increasing load on
                # the origin server.FORCE_CACHE_ALL Cache all content, ignoring any "private",
                # "no-store" or "no-cache" directives in Cache-Control response headers.
                # Warning: this may result in Cloud CDN caching private,
                # per-user (user identifiable) content.CACHE_ALL_STATIC Automatically cache static content,
                # including common image formats, media (video and audio), and web assets
                # (JavaScript and CSS). Requests and responses that are marked as
                # uncacheable, as well as dynamic content (including HTML), will not be
                # cached.
                #
                # If no value is provided for cdnPolicy.cacheMode, it defaults
                # to CACHE_ALL_STATIC.
            "clientTtl": 42, # Specifies a separate client (e.g. browser client) maximum TTL. This is
                # used to clamp the max-age (or Expires) value sent to the client.  With
                # FORCE_CACHE_ALL, the lesser of client_ttl and default_ttl is used for the
                # response max-age directive, along with a "public" directive.  For
                # cacheable content in CACHE_ALL_STATIC mode, client_ttl clamps the max-age
                # from the origin (if specified), or else sets the response max-age
                # directive to the lesser of the client_ttl and default_ttl, and also
                # ensures a "public" cache-control directive is present.
                # If a client TTL is not specified, a default value (1 hour) will be used.
                # The maximum allowed value is 31,622,400s (1 year).
            "defaultTtl": 42, # Specifies the default TTL for cached content served by this origin for
                # responses that do not have an existing valid TTL (max-age or s-maxage).
                # Setting a TTL of "0" means "always revalidate".
                # The value of defaultTTL cannot be set to a value greater than that of
                # maxTTL, but can be equal.
                # When the cacheMode is set to FORCE_CACHE_ALL, the defaultTTL
                # will overwrite the TTL set in all responses. The maximum allowed value is
                # 31,622,400s (1 year), noting that infrequently accessed objects may be
                # evicted from the cache before the defined TTL.
            "maxTtl": 42, # Specifies the maximum allowed TTL for cached content served by this
                # origin.
                # Cache directives that attempt to set a max-age or s-maxage higher than
                # this, or an Expires header more than maxTTL seconds in the future will
                # be capped at the value of maxTTL, as if it were the value of an
                # s-maxage Cache-Control directive.
                # Headers sent to the client will not be modified.
                # Setting a TTL of "0" means "always revalidate".
                # The maximum allowed value is 31,622,400s (1 year), noting that
                # infrequently accessed objects may be evicted from the cache before
                # the defined TTL.
            "negativeCaching": True or False, # Negative caching allows per-status code TTLs to be set, in order
                # to apply fine-grained caching for common errors or redirects.
                # This can reduce the load on your origin and improve end-user
                # experience by reducing response latency.
                # When the cache mode is set to CACHE_ALL_STATIC or USE_ORIGIN_HEADERS,
                # negative caching applies to responses with the specified response code
                # that lack any Cache-Control, Expires, or Pragma: no-cache directives.
                # When the cache mode is set to FORCE_CACHE_ALL, negative caching applies
                # to all responses with the specified response code, and override any
                # caching headers.
                # By default, Cloud CDN will apply the following default TTLs to these
                # status codes:
                # HTTP 300 (Multiple Choice), 301, 308 (Permanent Redirects): 10m
                # HTTP 404 (Not Found), 410 (Gone),
                # 451 (Unavailable For Legal Reasons): 120s
                # HTTP 405 (Method Not Found), 501 (Not Implemented): 60s.
                # These defaults can be overridden in negative_caching_policy.
            "negativeCachingPolicy": [ # Sets a cache TTL for the specified HTTP status code.
                # negative_caching must be enabled to configure negative_caching_policy.
                # Omitting the policy and leaving negative_caching enabled will use
                # Cloud CDN's default cache TTLs.
                # Note that when specifying an explicit negative_caching_policy, you
                # should take care to specify a cache TTL for all response codes
                # that you wish to cache. Cloud CDN will not apply any default
                # negative caching when a policy exists.
              { # Specify CDN TTLs for response error codes.
                "code": 42, # The HTTP status code to define a TTL against. Only HTTP status codes
                    # 300, 301, 302, 307, 308, 404, 405, 410, 421, 451 and 501 can be
                    # specified as values, and you cannot specify a status code more than
                    # once.
                "ttl": 42, # The TTL (in seconds) for which to cache responses with the
                    # corresponding status code.
                    # The maximum allowed value is 1800s (30 minutes), noting that
                    # infrequently accessed objects may be evicted from the cache before the
                    # defined TTL.
              },
            ],
            "requestCoalescing": True or False, # If true then Cloud CDN will combine multiple concurrent cache fill
                # requests into a small number of requests to the origin.
            "serveWhileStale": 42, # Serve existing content from the cache (if available) when revalidating
                # content with the origin, or when an error is encountered when refreshing
                # the cache.
                # This setting defines the default "max-stale" duration for any cached
                # responses that do not specify a max-stale directive. Stale responses that
                # exceed the TTL configured here will not be served. The default limit
                # (max-stale) is 86400s (1 day), which will allow stale content to be
                # served up to this limit beyond the max-age (or s-maxage) of a cached
                # response.
                # The maximum allowed value is 604800 (1 week).
                # Set this to zero (0) to disable serve-while-stale.
            "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be
                # considered fresh. After this time period, the response will be
                # revalidated before being served. Defaults to 1hr (3600s).  When serving
                # responses to signed URL requests, Cloud CDN will internally behave as
                # though all responses from this backend had a "Cache-Control:
                # public, max-age=[TTL]" header, regardless of any existing
                # Cache-Control header. The actual headers served in responses will not be
                # altered.
            "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
              "A String",
            ],
          },
          "circuitBreakers": { # Settings controlling the volume of requests, connections and retries to this
              # backend service.
            "connectTimeout": { # A Duration represents a fixed-length span of time represented # The timeout for new network connections to hosts.
                # as a count of seconds and fractions of seconds at nanosecond
                # resolution. It is independent of any calendar and concepts like "day"
                # or "month". Range is approximately 10,000 years.
              "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                  # Durations less than one second are represented with a 0
                  # `seconds` field and a positive `nanos` field. Must be from 0
                  # to 999,999,999 inclusive.
              "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                  # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                  # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
            },
            "maxConnections": 42, # The maximum number of connections to the backend service. If not specified,
                # there is no limit.
                #
                # Not supported when the backend service is referenced by a URL map that is
                # bound to target gRPC proxy that has validateForProxyless field set to true.
            "maxPendingRequests": 42, # The maximum number of pending requests allowed to the backend service. If
                # not specified, there is no limit.
                #
                # Not supported when the backend service is referenced by a URL map that is
                # bound to target gRPC proxy that has validateForProxyless field set to true.
            "maxRequests": 42, # The maximum number of parallel requests that allowed to the backend
                # service. If not specified, there is no limit.
            "maxRequestsPerConnection": 42, # Maximum requests for a single connection to the backend service.
                # This parameter is respected by both the HTTP/1.1 and HTTP/2
                # implementations. If not specified, there is no limit. Setting this
                # parameter to 1 will effectively disable keep alive.
                #
                # Not supported when the backend service is referenced by a URL map that is
                # bound to target gRPC proxy that has validateForProxyless field set to true.
            "maxRetries": 42, # The maximum number of parallel retries allowed to the backend cluster. If
                # not specified, the default is 1.
                #
                # Not supported when the backend service is referenced by a URL map that is
                # bound to target gRPC proxy that has validateForProxyless field set to true.
          },
          "compressionMode": "A String", # Compress text responses using Brotli or gzip compression, based on
              # the client's Accept-Encoding header.
          "connectionDraining": { # Message containing connection draining configuration. # connectionDraining cannot be specified with haPolicy.
            "drainingTimeoutSec": 42, # Configures a duration timeout for existing requests on a removed backend
                # instance. For supported load balancers and protocols, as described inEnabling
                # connection draining.
          },
          "connectionTrackingPolicy": { # Connection Tracking configuration for this BackendService. # Connection Tracking configuration for this BackendService. Connection
              # tracking policy settings are only available for external passthrough
              # Network Load Balancers and internal passthrough Network Load Balancers.
              #
              # connectionTrackingPolicy cannot be specified with haPolicy.
            "connectionPersistenceOnUnhealthyBackends": "A String", # Specifies connection persistence when backends are unhealthy. The default
                # value is DEFAULT_FOR_PROTOCOL.
                #
                # If set to DEFAULT_FOR_PROTOCOL, the existing connections
                # persist on unhealthy backends only for connection-oriented protocols
                # (TCP and SCTP) and only if the Tracking Mode isPER_CONNECTION (default tracking mode) or the Session
                # Affinity is configured for 5-tuple. They do not persist forUDP.
                #
                # If set to NEVER_PERSIST, after a backend becomes unhealthy,
                # the existing connections on the unhealthy backend are never persisted on
                # the unhealthy backend. They are always diverted to newly selected healthy
                # backends (unless all backends are unhealthy).
                #
                # If set to ALWAYS_PERSIST, existing connections always
                # persist on unhealthy backends regardless of protocol and session
                # affinity. It is generally not recommended to use this mode overriding the
                # default.
                #
                # For more details, see [Connection Persistence for Network Load
                # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#connection-persistence)
                # and [Connection Persistence for Internal TCP/UDP Load
                # Balancing](https://cloud.google.com/load-balancing/docs/internal#connection-persistence).
            "enableStrongAffinity": True or False, # Enable Strong Session Affinity for external passthrough Network Load
                # Balancers. This option is not available publicly.
            "idleTimeoutSec": 42, # Specifies how long to keep a Connection Tracking entry while there is no
                # matching traffic (in seconds).
                #
                # For internal passthrough Network Load Balancers:
                #
                #    - The minimum (default) is 10 minutes and the maximum is 16 hours.
                #    - It can be set only if Connection Tracking is less than 5-tuple
                #    (i.e. Session Affinity is CLIENT_IP_NO_DESTINATION,CLIENT_IP or CLIENT_IP_PROTO, and Tracking
                #    Mode is PER_SESSION).
                #
                #
                #
                # For external passthrough Network Load Balancers the default is 60
                # seconds. This option is not available publicly.
            "trackingMode": "A String", # Specifies the key used for connection tracking. There are two
                # options:
                #
                #    - PER_CONNECTION: This is the default mode. The Connection
                #    Tracking is performed as per the Connection Key (default Hash Method) for
                #    the specific protocol.
                #    - PER_SESSION: The Connection Tracking is performed as per
                #    the configured Session Affinity. It matches the configured Session
                #    Affinity.
                #
                #
                #
                # For more details, see [Tracking Mode for Network Load
                # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#tracking-mode)
                # and [Tracking Mode for Internal TCP/UDP Load
                # Balancing](https://cloud.google.com/load-balancing/docs/internal#tracking-mode).
          },
          "consistentHash": { # This message defines settings for a consistent hash style load balancer. # Consistent Hash-based load balancing can be used to provide soft session
              # affinity based on HTTP headers, cookies or other properties. This load
              # balancing policy is applicable only for HTTP connections. The affinity to a
              # particular destination host will be lost when one or more hosts are
              # added/removed from the destination service. This field specifies parameters
              # that control consistent hashing. This field is only applicable whenlocalityLbPolicy is set to MAGLEV orRING_HASH.
              #
              # This field is applicable to either:
              #
              #    - A regional backend service with the service protocol set to HTTP,
              #    HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
              #    INTERNAL_MANAGED.
              #    - A global backend service with the
              #    load_balancing_scheme set to INTERNAL_SELF_MANAGED.
            "httpCookie": { # The information about the HTTP Cookie on which the hash function is based # Hash is based on HTTP Cookie. This field describes a HTTP cookie that will
                # be used as the hash key for the consistent hash load balancer. If the
                # cookie is not present, it will be generated. This field is applicable if
                # the sessionAffinity is set to HTTP_COOKIE.
                #
                # Not supported when the backend service is referenced by a URL map that is
                # bound to target gRPC proxy that has validateForProxyless field set to true.
                # for load balancing policies that use a consistent hash.
              "name": "A String", # Name of the cookie.
              "path": "A String", # Path to set for the cookie.
              "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
                  # as a count of seconds and fractions of seconds at nanosecond
                  # resolution. It is independent of any calendar and concepts like "day"
                  # or "month". Range is approximately 10,000 years.
                "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                    # Durations less than one second are represented with a 0
                    # `seconds` field and a positive `nanos` field. Must be from 0
                    # to 999,999,999 inclusive.
                "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                    # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                    # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
              },
            },
            "httpHeaderName": "A String", # The hash based on the value of the specified header field. This field is
                # applicable if the sessionAffinity is set toHEADER_FIELD.
            "minimumRingSize": "A String", # The minimum number of virtual nodes to use for the hash ring. Defaults to
                # 1024. Larger ring sizes result in more granular load distributions. If the
                # number of hosts in the load balancing pool is larger than the ring size,
                # each host will be assigned a single virtual node.
          },
          "creationTimestamp": "A String", # Output only. [Output Only] Creation timestamp inRFC3339
              # text format.
          "customMetrics": [ # List of custom metrics that are used for theWEIGHTED_ROUND_ROBIN locality_lb_policy.
            { # Custom Metrics are used for WEIGHTED_ROUND_ROBIN
                # locality_lb_policy.
              "dryRun": True or False, # If true, the metric data is not used for load balancing.
              "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
                  # long and match the regular expression
                  # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
                  # first character must be a lowercase letter, and all following
                  # characters must be a dash, period, underscore, lowercase letter, or
                  # digit, except the last character, which cannot be a dash, period, or
                  # underscore. For usage guidelines, see Custom Metrics balancing mode. This
                  # field can only be used for a global or regional backend service with the
                  # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
            },
          ],
          "customRequestHeaders": [ # Headers that the load balancer adds to proxied requests. See [Creating
              # custom
              # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
            "A String",
          ],
          "customResponseHeaders": [ # Headers that the load balancer adds to proxied responses. See [Creating
              # custom
              # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
            "A String",
          ],
          "description": "A String", # An optional description of this resource. Provide this property when you
              # create the resource.
          "dynamicForwarding": { # Defines a dynamic forwarding configuration for the backend service. # Dynamic forwarding configuration. This field is used to configure the
              # backend service with dynamic forwarding feature which together with Service
              # Extension allows customized and complex routing logic.
            "forwardProxy": { # Defines Dynamic Forwarding Proxy configuration. # Dynamic Forwarding Proxy configuration.
              "enabled": True or False, # A boolean flag enabling dynamic forwarding proxy.
              "proxyMode": "A String", # Determines the dynamic forwarding proxy mode.
            },
            "ipPortSelection": { # Defines a IP:PORT based dynamic forwarding configuration for the backend # IP:PORT based dynamic forwarding configuration.
                # service. Some ranges are restricted: Restricted
                # ranges.
              "enabled": True or False, # A boolean flag enabling IP:PORT based dynamic forwarding.
            },
          },
          "edgeSecurityPolicy": "A String", # [Output Only] The resource URL for the edge security policy associated with
              # this backend service.
          "enableCDN": True or False, # If true, enables Cloud CDN for the backend service of a
              # global external Application Load Balancer.
          "externalManagedMigrationState": "A String", # Specifies the canary migration state. Possible values are PREPARE,
              # TEST_BY_PERCENTAGE, and TEST_ALL_TRAFFIC.
              #
              # To begin the migration from EXTERNAL to EXTERNAL_MANAGED, the state must be
              # changed to PREPARE. The state must be changed to TEST_ALL_TRAFFIC before
              # the loadBalancingScheme can be changed to EXTERNAL_MANAGED. Optionally, the
              # TEST_BY_PERCENTAGE state can be used to migrate traffic by percentage using
              # externalManagedMigrationTestingPercentage.
              #
              # Rolling back a migration requires the states to be set in reverse order. So
              # changing the scheme from EXTERNAL_MANAGED to EXTERNAL requires the state to
              # be set to TEST_ALL_TRAFFIC at the same time. Optionally, the
              # TEST_BY_PERCENTAGE state can be used to migrate some traffic back to
              # EXTERNAL or PREPARE can be used to migrate all traffic back to EXTERNAL.
          "externalManagedMigrationTestingPercentage": 3.14, # Determines the fraction of requests that should be processed by the Global
              # external Application Load Balancer.
              #
              # The value of this field must be in the range [0, 100].
              #
              # Session affinity options will slightly affect this routing behavior, for
              # more details, see:Session
              # Affinity.
              #
              # This value can only be set if the loadBalancingScheme in the BackendService
              # is set to EXTERNAL (when using the classic Application Load Balancer) and
              # the migration state is TEST_BY_PERCENTAGE.
          "failoverPolicy": { # For load balancers that have configurable # Requires at least one backend instance group to be defined
              # as a backup (failover) backend.
              # For load balancers that have configurable failover:
              # [Internal passthrough Network Load
              # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
              # and [external passthrough Network Load
              # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
              #
              # failoverPolicy cannot be specified with haPolicy.
              # failover:
              # [Internal passthrough Network Load
              # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
              # and [external passthrough
              # Network Load
              # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
              # On failover or failback, this field indicates whether connection draining
              # will be honored. Google Cloud has a fixed connection draining timeout of
              # 10 minutes. A setting of true terminates existing TCP
              # connections to the active pool during failover and failback, immediately
              # draining traffic. A setting of false allows existing TCP
              # connections to persist, even on VMs no longer in the active pool, for up
              # to the duration of the connection draining timeout (10 minutes).
            "disableConnectionDrainOnFailover": True or False, # This can be set to true if the protocol isTCP, UDP, or UNSPECIFIED.
                #
                # The default is false.
            "dropTrafficIfUnhealthy": True or False, # If set to true, connections to the
                # load balancer are dropped when all primary and all backup backend VMs are
                # unhealthy.If set to false, connections are distributed
                # among all primary VMs when all primary and all backup backend VMs are
                #  unhealthy.
                # For load balancers that have configurable
                # failover:
                # [Internal passthrough
                # Network Load
                # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
                # and [external passthrough
                # Network Load
                # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
                # The default is false.
            "failoverRatio": 3.14, # The value of the field must be in the range[0, 1]. If the value is 0, the load balancer performs a
                # failover when the number of healthy primary VMs equals zero.
                # For all other values, the load balancer performs a failover when the
                # total number of healthy primary VMs is less than this ratio.
                # For load balancers that have configurable
                # failover:
                # [Internal TCP/UDP Load
                # Balancing](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
                # and [external TCP/UDP Load
                # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
          },
          "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object.
              # This field is used in optimistic locking. This field will be ignored when
              # inserting a BackendService. An up-to-date fingerprint must be provided in
              # order to update the BackendService, otherwise the request will
              # fail with error 412 conditionNotMet.
              #
              # To see the latest fingerprint, make a get() request to
              # retrieve a BackendService.
          "haPolicy": { # Configures self-managed High Availability (HA) for External and Internal
              # Protocol Forwarding.
              #
              # The backends of this regional backend service must only specify zonal
              # network endpoint groups (NEGs) of type GCE_VM_IP.
              #
              # When haPolicy is set for an Internal Passthrough Network Load Balancer, the
              # regional backend service must set the network field. All zonal NEGs must
              # belong to the same network. However, individual NEGs can
              # belong to different subnetworks of that network.
              #
              # When haPolicy is specified, the set of attached network endpoints across
              # all backends comprise an High Availability domain from which one endpoint
              # is selected as the active endpoint (the leader) that receives all
              # traffic.
              #
              # haPolicy can be added only at backend service creation time. Once set up,
              # it cannot be deleted.
              #
              # Note that haPolicy is not for load balancing, and therefore cannot be
              # specified with sessionAffinity, connectionTrackingPolicy, and
              # failoverPolicy.
              #
              # haPolicy requires customers to be responsible for tracking backend
              # endpoint health and electing a leader among the healthy endpoints.
              # Therefore, haPolicy cannot be specified with healthChecks.
              #
              # haPolicy can only be specified for External Passthrough Network Load
              # Balancers and Internal Passthrough Network Load Balancers.
            "fastIPMove": "A String", # Specifies whether fast IP move is enabled, and if so, the mechanism to
                # achieve it.
                #
                # Supported values are:
                #
                #    - DISABLED: Fast IP Move is disabled. You can only use the
                #    haPolicy.leader API to update the leader.
                #    - >GARP_RA: Provides a method to very quickly define a new network
                #    endpoint as the leader. This method is faster than updating the leader
                #    using the haPolicy.leader API. Fast IP move works as follows: The VM
                #    hosting the network endpoint that should become the new leader sends
                #    either a Gratuitous ARP (GARP) packet (IPv4) or an ICMPv6 Router
                #    Advertisement(RA) packet (IPv6).  Google Cloud immediately but
                #    temporarily associates the forwarding rule IP address with that VM, and
                #    both new and in-flight packets are quickly delivered to that VM.
                #
                #
                #
                # Note the important properties of the Fast IP Move functionality:
                #
                #    - The GARP/RA-initiated re-routing stays active for approximately 20
                #    minutes. After triggering fast failover, you must also
                #    appropriately set the haPolicy.leader.
                #    -  The new leader instance should continue to send GARP/RA packets
                #    periodically every 10 seconds until at least 10 minutes after updating
                #    the haPolicy.leader (but stop immediately if it is no longer the leader).
                #    - After triggering a fast failover, we recommend that you wait at least
                #    3 seconds before sending another GARP/RA packet from a different VM
                #    instance to avoid race conditions.
                #    - Don't send GARP/RA packets from different VM
                #    instances at the same time. If multiple instances continue to send
                #    GARP/RA packets, traffic might be routed to different destinations in an
                #    alternating order. This condition ceases when a single instance
                #    issues a GARP/RA packet.
                #    - The GARP/RA request always takes priority over the leader API.
                #    Using the haPolicy.leader API to change the leader to a different
                #    instance will have no effect until the GARP/RA request becomes
                #    inactive.
                #    - The GARP/RA packets should follow the GARP/RA
                #    Packet Specifications..
                #    -  When multiple forwarding rules refer to a regional backend service,
                #    you need only send a GARP or RA packet for a single forwarding rule
                #    virtual IP. The virtual IPs for all forwarding rules targeting the same
                #    backend service will also be moved to the sender of the GARP or RA
                #    packet.
                #
                #
                #
                # The following are the Fast IP Move limitations (that is, when fastIPMove
                # is not DISABLED):
                #
                #    - Multiple forwarding rules cannot use the same IP address if one of
                #    them refers to a regional backend service with fastIPMove.
                #    - The regional backend service must set the network field, and all
                #    NEGs must belong to that network. However, individual
                #    NEGs can belong to different subnetworks of that network.
                #    - The maximum number of network endpoints across all backends of a
                #    backend service with fastIPMove is 32.
                #    - The maximum number of backend services with fastIPMove that can have
                #    the same network endpoint attached to one of its backends is 64.
                #    - The maximum number of backend services with fastIPMove in a VPC in a
                #    region is 64.
                #    - The network endpoints that are attached to a backend of a backend
                #    service with fastIPMove cannot resolve to Gen3+ machines for IPv6.
                #    - Traffic directed to the leader by a static route next hop will not be
                #    redirected to a new leader by fast failover. Such traffic will only be
                #    redirected once an haPolicy.leader update has taken effect. Only traffic
                #    to the forwarding rule's virtual IP will be redirected to a new leader by
                #    fast failover.
                #
                #
                # haPolicy.fastIPMove can be set only at backend service creation time.
                # Once set, it cannot be updated.
                #
                # By default, fastIpMove is set to DISABLED.
            "leader": { # Selects one of the network endpoints attached to the backend NEGs of
                # this service as the active endpoint (the leader) that receives all
                # traffic.
                #
                # When the leader changes, there is no connection draining to persist
                # existing connections on the old leader.
                #
                # You are responsible for selecting a suitable endpoint as the
                # leader. For example, preferring a healthy endpoint over unhealthy ones.
                # Note that this service does not track backend endpoint health, and
                # selects the configured leader unconditionally.
              "backendGroup": "A String", # A fully-qualified URL (starting with https://www.googleapis.com/)
                  # of the zonal Network Endpoint Group (NEG) with `GCE_VM_IP` endpoints
                  # that the leader is attached to.
                  #
                  # The leader's backendGroup must already be specified as a backend of
                  # this backend service. Removing a backend that is designated as the
                  # leader's backendGroup is not permitted.
              "networkEndpoint": { # The network endpoint within the leader.backendGroup that is
                  # designated as the leader.
                  #
                  # This network endpoint cannot be detached from the NEG specified in
                  # the haPolicy.leader.backendGroup until the leader is updated with
                  # another network endpoint, or the leader is removed from the haPolicy.
                "instance": "A String", # The name of the VM instance of the leader network endpoint. The
                    # instance must already be attached to the NEG specified in the
                    # haPolicy.leader.backendGroup.
                    #
                    # The name must be 1-63 characters long, and comply with RFC1035.
                    # Authorization requires the following IAM permission on the
                    # specified resource instance: compute.instances.use
              },
            },
          },
          "healthChecks": [ # The list of URLs to the healthChecks, httpHealthChecks (legacy), or
              # httpsHealthChecks (legacy) resource for health checking this backend
              # service. Not all backend services support legacy health checks. See
              # Load balancer guide. Currently, at most one health check can be
              # specified for each backend service. Backend services with
              # instance group or zonal NEG backends must have a health check unless
              # haPolicy is specified. Backend services with internet or serverless NEG
              # backends must not have a health check.
              #
              # healthChecks[] cannot be specified with haPolicy.
            "A String",
          ],
          "iap": { # Identity-Aware Proxy # The configurations for Identity-Aware Proxy on this resource.
              # Not available for internal passthrough Network Load Balancers and external
              # passthrough Network Load Balancers.
            "enabled": True or False, # Whether the serving infrastructure will authenticate and authorize all
                # incoming requests.
            "oauth2ClientId": "A String", # OAuth2 client ID to use for the authentication flow.
            "oauth2ClientSecret": "A String", # OAuth2 client secret to use for the authentication flow.
                # For security reasons, this value cannot be retrieved via the API.
                # Instead, the SHA-256 hash of the value is returned in the
                # oauth2ClientSecretSha256 field.
                #
                # @InputOnly
            "oauth2ClientSecretSha256": "A String", # Output only. [Output Only] SHA256 hash value for the field oauth2_client_secret above.
          },
          "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is
              # defined by the server.
          "ipAddressSelectionPolicy": "A String", # Specifies a preference for traffic sent from the proxy to the backend (or
              # from the client to the backend for proxyless gRPC).
              # The possible values are:
              #
              #    - IPV4_ONLY: Only send IPv4 traffic to the backends of the
              #    backend service (Instance Group, Managed Instance Group, Network Endpoint
              #    Group), regardless of traffic from the client to the proxy. Only IPv4
              #    health checks are used to check the health of the backends. This is the
              #    default setting.
              #    - PREFER_IPV6: Prioritize the connection to the endpoint's
              #    IPv6 address over its IPv4 address (provided there is a healthy IPv6
              #    address).
              #    - IPV6_ONLY: Only send IPv6 traffic to the backends of the
              #    backend service (Instance Group, Managed Instance Group, Network Endpoint
              #    Group), regardless of traffic from the client to the proxy. Only IPv6
              #    health checks are used to check the health of the backends.
              #
              #
              #
              # This field is applicable to either:
              #
              #    -  Advanced global external Application Load Balancer (load balancing
              #    scheme EXTERNAL_MANAGED),
              #    -  Regional external Application Load
              #    Balancer,
              #    -  Internal proxy Network Load Balancer (load balancing
              #    scheme INTERNAL_MANAGED),
              #    -  Regional internal Application Load
              #    Balancer (load balancing scheme INTERNAL_MANAGED),
              #    -  Traffic
              #    Director with Envoy proxies and proxyless gRPC (load balancing scheme
              #    INTERNAL_SELF_MANAGED).
          "kind": "compute#backendService", # Output only. [Output Only] Type of resource. Always compute#backendService
              # for backend services.
          "loadBalancingScheme": "A String", # Specifies the load balancer type. A backend service
              # created for one type of load balancer cannot be used with another.
              # For more information, refer toChoosing
              # a load balancer.
          "localityLbPolicies": [ # A list of locality load-balancing policies to be used in order of
              # preference. When you use localityLbPolicies, you must set at least one
              # value for either the localityLbPolicies[].policy or the
              # localityLbPolicies[].customPolicy field. localityLbPolicies overrides any
              # value set in the localityLbPolicy field.
              #
              # For an example of how to use this field, seeDefine
              # a list of preferred policies.
              #
              # Caution: This field and its children are intended for use in a service mesh
              # that includes gRPC clients only. Envoy proxies can't use backend services
              # that have this configuration.
            { # Container for either a built-in LB policy supported by gRPC or Envoy or
                # a custom one implemented by the end user.
              "customPolicy": { # The configuration for a custom policy implemented by the user and
                  # deployed with the client.
                "data": "A String", # An optional, arbitrary JSON object with configuration data, understood
                    # by a locally installed custom policy implementation.
                "name": "A String", # Identifies the custom policy.
                    #
                    # The value should match the name of a custom implementation registered
                    # on the gRPC clients. It should follow protocol buffer message naming
                    # conventions and include the full path (for example,
                    # myorg.CustomLbPolicy). The maximum length is 256 characters.
                    #
                    # Do not specify the same custom policy more than once for a
                    # backend. If you do, the configuration is rejected.
                    #
                    # For an example of how to use this field, seeUse
                    # a custom policy.
              },
              "policy": { # The configuration for a built-in load balancing policy.
                "name": "A String", # The name of a locality load-balancing policy. Valid values include
                    # ROUND_ROBIN and, for Java clients, LEAST_REQUEST. For information
                    # about these values, see the description of localityLbPolicy.
                    #
                    # Do not specify the same policy more than once for a
                    # backend. If you do, the configuration is rejected.
              },
            },
          ],
          "localityLbPolicy": "A String", # The load balancing algorithm used within the scope of the locality. The
              # possible values are:
              #
              #    - ROUND_ROBIN: This is a simple policy in which each healthy
              #    backend is selected in round robin order. This is the default.
              #    - LEAST_REQUEST: An O(1) algorithm which
              #    selects two random healthy hosts and picks the host which has fewer active
              #    requests.
              #    - RING_HASH: The ring/modulo hash load balancer implements
              #    consistent hashing to backends. The algorithm has the property that the
              #    addition/removal of a host from a set of N hosts only affects 1/N of the
              #    requests.
              #    - RANDOM: The load balancer selects a random healthy
              #    host.
              #    - ORIGINAL_DESTINATION: Backend host is selected
              #    based on the client connection metadata, i.e., connections are opened to
              #    the same address as the destination address of the incoming connection
              #    before the connection was redirected to the load balancer.
              #    - MAGLEV: used as a drop in replacement for the ring hash
              #    load balancer. Maglev is not as stable as ring hash but has faster table
              #    lookup build times and host selection times. For more information about
              #    Maglev, see Maglev:
              #    A Fast and Reliable Software Network Load Balancer.
              #    - WEIGHTED_ROUND_ROBIN: Per-endpoint Weighted Round Robin
              #    Load Balancing using weights computed from Backend reported Custom Metrics.
              #    If set, the Backend Service responses are expected to contain non-standard
              #    HTTP response header field Endpoint-Load-Metrics. The reported
              #    metrics to use for computing the weights are specified via thecustomMetrics field.
              #
              #    This field is applicable to either:
              #       - A regional backend service with the service protocol set to HTTP,
              #       HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
              #       INTERNAL_MANAGED.
              #       - A global backend service with the
              #       load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or
              #       EXTERNAL_MANAGED.
              #
              #
              #    If sessionAffinity is not configured—that is, if session
              #    affinity remains at the default value of NONE—then the
              #    default value for localityLbPolicy
              #    is ROUND_ROBIN. If session affinity is set to a value other
              #    than NONE,
              #    then the default value for localityLbPolicy isMAGLEV.
              #
              #    Only ROUND_ROBIN and RING_HASH are supported
              #    when the backend service is referenced by a URL map that is bound to
              #    target gRPC proxy that has validateForProxyless field set to true.
              #
              #    localityLbPolicy cannot be specified with haPolicy.
          "logConfig": { # The available logging options for the load balancer traffic served by this # This field denotes the logging options for the load balancer traffic served
              # by this backend service. If logging is enabled, logs will be exported to
              # Stackdriver.
              # backend service.
            "enable": True or False, # Denotes whether to enable logging for the load balancer
                # traffic served by this backend service. The default value is false.
            "optionalFields": [ # This field can only be specified if logging is enabled for this backend
                # service and "logConfig.optionalMode" was set to CUSTOM. Contains a list
                # of optional fields you want to include in the logs. For example:
                # serverInstance, serverGkeDetails.cluster,
                # serverGkeDetails.pod.podNamespace
              "A String",
            ],
            "optionalMode": "A String", # This field can only be specified if logging is enabled for this backend
                # service. Configures whether all, none or a subset of optional fields
                # should be added to the reported logs. One of [INCLUDE_ALL_OPTIONAL,
                # EXCLUDE_ALL_OPTIONAL, CUSTOM]. Default is EXCLUDE_ALL_OPTIONAL.
            "sampleRate": 3.14, # This field can only be specified if logging is enabled for this backend
                # service. The value of the field must be in [0, 1]. This configures the
                # sampling rate of requests to the load balancer where 1.0 means all logged
                # requests are reported and 0.0 means no logged requests are reported. The
                # default value is 1.0.
          },
          "maxStreamDuration": { # A Duration represents a fixed-length span of time represented # Specifies the default maximum duration (timeout) for streams to this
              # service. Duration is computed from the beginning of the stream until the
              # response has been completely processed, including all retries. A stream
              # that does not complete in this duration is closed.
              #
              # If not specified, there will be no timeout limit, i.e. the maximum
              # duration is infinite.
              #
              # This value can be overridden in the PathMatcher configuration of the
              # UrlMap that references this backend service.
              #
              # This field is only allowed when the loadBalancingScheme of
              # the backend service is INTERNAL_SELF_MANAGED.
              # as a count of seconds and fractions of seconds at nanosecond
              # resolution. It is independent of any calendar and concepts like "day"
              # or "month". Range is approximately 10,000 years.
            "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                # Durations less than one second are represented with a 0
                # `seconds` field and a positive `nanos` field. Must be from 0
                # to 999,999,999 inclusive.
            "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
          },
          "metadatas": { # Deployment metadata associated with the resource to be set by a GKE hub
              # controller and read by the backend RCTH
            "a_key": "A String",
          },
          "name": "A String", # Name of the resource. Provided by the client when the resource is created.
              # The name must be 1-63 characters long, and comply withRFC1035.
              # Specifically, the name must be 1-63 characters long and match the regular
              # expression `[a-z]([-a-z0-9]*[a-z0-9])?` which means the first
              # character must be a lowercase letter, and all following characters must
              # be a dash, lowercase letter, or digit, except the last character, which
              # cannot be a dash.
          "network": "A String", # The URL of the network to which this backend service belongs.
              #
              # This field must be set for Internal Passthrough Network Load Balancers when
              # the haPolicy is enabled, and for External Passthrough Network Load
              # Balancers when the haPolicy fastIpMove is enabled.
              #
              # This field can only be specified when the load balancing scheme is set toINTERNAL, or when the load balancing scheme is set toEXTERNAL and haPolicy fastIpMove is enabled.
          "networkPassThroughLbTrafficPolicy": { # Configures traffic steering properties of internal passthrough Network
              # Load Balancers.
              #
              # networkPassThroughLbTrafficPolicy cannot be specified with haPolicy.
            "zonalAffinity": { # When configured, new connections are load balanced across healthy backend
                # endpoints in the local zone.
              "spillover": "A String", # This field indicates whether zonal affinity is enabled or not. The
                  # possible values are:
                  #
                  #    - ZONAL_AFFINITY_DISABLED: Default Value. Zonal Affinity
                  #    is disabled. The load balancer distributes new connections to all
                  #    healthy backend endpoints across all zones.
                  #    - ZONAL_AFFINITY_STAY_WITHIN_ZONE: Zonal Affinity is
                  #    enabled. The load balancer distributes new connections to all healthy
                  #    backend endpoints in the local zone only. If there are no healthy
                  #    backend endpoints in the local zone, the load balancer distributes
                  #    new connections to all backend endpoints in the local zone.
                  #    - ZONAL_AFFINITY_SPILL_CROSS_ZONE: Zonal Affinity is
                  #    enabled. The load balancer distributes new connections to all healthy
                  #    backend endpoints in the local zone only. If there aren't enough
                  #    healthy backend endpoints in the local zone, the load balancer
                  #    distributes new connections to all healthy backend endpoints across all
                  #    zones.
              "spilloverRatio": 3.14, # The value of the field must be in [0, 1]. When the ratio of the count
                  # of healthy backend endpoints in a zone to the count of backend
                  # endpoints in that same zone is equal to or above this threshold, the
                  # load balancer distributes new connections to all healthy endpoints in
                  # the local zone only. When the ratio of the count of healthy backend
                  # endpoints in a zone to the count of backend endpoints in that same
                  # zone is below this threshold, the load balancer distributes all new
                  # connections to all healthy endpoints across all zones.
            },
          },
          "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend service.
              # the backend service.
            "resourceUri": "A String", # The resource URI of the resource or system that manages the backend
                # service.
          },
          "outlierDetection": { # Settings controlling the eviction of unhealthy hosts from the load balancing # Settings controlling the ejection of unhealthy backend endpoints from the
              # load balancing pool of each individual proxy instance that processes the
              # traffic for the given backend service. If not set, this feature is
              # considered disabled.
              #
              # Results of the outlier detection algorithm (ejection of endpoints from the
              # load balancing pool and returning them back to the pool) are executed
              # independently by each proxy instance of the load balancer. In most cases,
              # more than one proxy instance handles the traffic received by a backend
              # service. Thus, it is possible that an unhealthy endpoint is detected and
              # ejected by only some of the proxies, and while this happens, other proxies
              # may continue to send requests to the same unhealthy endpoint until they
              # detect and eject the unhealthy endpoint.
              #
              # Applicable backend endpoints can be:
              #
              #    - VM instances in an Instance Group
              #    - Endpoints in a Zonal NEG (GCE_VM_IP, GCE_VM_IP_PORT)
              #    - Endpoints in a Hybrid Connectivity NEG (NON_GCP_PRIVATE_IP_PORT)
              #    - Serverless NEGs, that resolve to Cloud Run, App Engine, or Cloud
              #    Functions Services
              #    - Private Service Connect NEGs, that resolve to
              #    Google-managed regional API endpoints or managed services published using
              #    Private Service Connect
              #
              #
              #
              # Applicable backend service types can be:
              #
              #    - A global backend service with the loadBalancingScheme set to
              #    INTERNAL_SELF_MANAGED or EXTERNAL_MANAGED.
              #    - A regional backend
              #    service with the service protocol set to HTTP, HTTPS, HTTP2 or H2C, and
              #    loadBalancingScheme set to INTERNAL_MANAGED or EXTERNAL_MANAGED. Not
              #    supported for Serverless NEGs.
              #
              #
              #
              # Not supported when the backend service is referenced by a URL map that is
              # bound to target gRPC proxy that has validateForProxyless field set to true.
              # pool for the backend service.
            "baseEjectionTime": { # A Duration represents a fixed-length span of time represented # The base time that a backend endpoint is ejected for. Defaults to 30000ms
                # or 30s.
                #
                # After a backend endpoint is returned back to the load balancing pool, it
                # can be ejected again in another ejection analysis. Thus, the total ejection
                # time is equal to the base ejection time multiplied by the number of times
                # the backend endpoint has been ejected. Defaults to 30000ms or 30s.
                # as a count of seconds and fractions of seconds at nanosecond
                # resolution. It is independent of any calendar and concepts like "day"
                # or "month". Range is approximately 10,000 years.
              "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                  # Durations less than one second are represented with a 0
                  # `seconds` field and a positive `nanos` field. Must be from 0
                  # to 999,999,999 inclusive.
              "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                  # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                  # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
            },
            "consecutiveErrors": 42, # Number of consecutive errors before a backend endpoint is ejected from the
                # load balancing pool. When the backend endpoint is accessed over HTTP, a 5xx
                # return code qualifies as an error. Defaults to 5.
            "consecutiveGatewayFailure": 42, # The number of consecutive gateway failures (502, 503, 504 status or
                # connection errors that are mapped to one of those status codes) before a
                # consecutive gateway failure ejection occurs. Defaults to 3.
            "enforcingConsecutiveErrors": 42, # The percentage chance that a backend endpoint will be ejected when an
                # outlier status is detected through consecutive 5xx. This setting can be
                # used to disable ejection or to ramp it up slowly. Defaults to 0.
            "enforcingConsecutiveGatewayFailure": 42, # The percentage chance that a backend endpoint will be ejected when an
                # outlier status is detected through consecutive gateway failures. This
                # setting can be used to disable ejection or to ramp it up slowly. Defaults
                # to 100.
            "enforcingSuccessRate": 42, # The percentage chance that a backend endpoint will be ejected when an
                # outlier status is detected through success rate statistics. This setting
                # can be used to disable ejection or to ramp it up slowly. Defaults to 100.
                #
                # Not supported when the backend service uses Serverless NEG.
            "interval": { # A Duration represents a fixed-length span of time represented # Time interval between ejection analysis sweeps. This can result in both new
                # ejections and backend endpoints being returned to service. The interval is
                # equal to the number of seconds as defined in
                # outlierDetection.interval.seconds plus the number of nanoseconds as defined
                # in outlierDetection.interval.nanos. Defaults to 1 second.
                # as a count of seconds and fractions of seconds at nanosecond
                # resolution. It is independent of any calendar and concepts like "day"
                # or "month". Range is approximately 10,000 years.
              "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                  # Durations less than one second are represented with a 0
                  # `seconds` field and a positive `nanos` field. Must be from 0
                  # to 999,999,999 inclusive.
              "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                  # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                  # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
            },
            "maxEjectionPercent": 42, # Maximum percentage of backend endpoints in the load balancing pool for the
                # backend service that can be ejected if the ejection conditions are met.
                # Defaults to 50%.
            "successRateMinimumHosts": 42, # The number of backend endpoints in the load balancing pool that must have
                # enough request volume to detect success rate outliers. If the number of
                # backend endpoints is fewer than this setting, outlier detection via success
                # rate statistics is not performed for any backend endpoint in the load
                # balancing pool. Defaults to 5.
                #
                # Not supported when the backend service uses Serverless NEG.
            "successRateRequestVolume": 42, # The minimum number of total requests that must be collected in one interval
                # (as defined by the interval duration above) to include this backend
                # endpoint in success rate based outlier detection. If the volume is lower
                # than this setting, outlier detection via success rate statistics is not
                # performed for that backend endpoint. Defaults to 100.
                #
                # Not supported when the backend service uses Serverless NEG.
            "successRateStdevFactor": 42, # This factor is used to determine the ejection threshold for success rate
                # outlier ejection. The ejection threshold is the difference between the mean
                # success rate, and the product of this factor and the standard deviation of
                # the mean success rate: mean - (stdev * successRateStdevFactor). This factor
                # is divided by a thousand to get a double. That is, if the desired factor
                # is 1.9, the runtime value should be 1900. Defaults to 1900.
                #
                # Not supported when the backend service uses Serverless NEG.
          },
          "params": { # Additional Backend Service parameters. # Input only. [Input Only] Additional params passed with the request, but not persisted
              # as part of resource payload.
            "resourceManagerTags": { # Tag keys/values directly bound to this resource.
                # Tag keys and values have the same definition as resource
                # manager tags. The field is allowed for INSERT
                # only. The keys/values to set on the resource should be specified in
                # either ID { : } or Namespaced format
                # { : }.
                # For example the following are valid inputs:
                # * {"tagKeys/333" : "tagValues/444", "tagKeys/123" : "tagValues/456"}
                # * {"123/environment" : "production", "345/abc" : "xyz"}
                # Note:
                # * Invalid combinations of ID & namespaced format is not supported. For
                #   instance: {"123/environment" : "tagValues/444"} is invalid.
              "a_key": "A String",
            },
          },
          "port": 42, # Deprecated in favor of portName. The TCP port to connect on
              # the backend. The default value is 80.
              # For internal passthrough Network Load Balancers and external passthrough
              # Network Load Balancers, omit port.
          "portName": "A String", # A named port on a backend instance group representing the port for
              # communication to the backend VMs in that group. The
              # named port must be [defined on each backend instance
              # group](https://cloud.google.com/load-balancing/docs/backend-service#named_ports).
              # This parameter has no meaning if the backends are NEGs. For internal
              # passthrough Network Load Balancers and external passthrough Network Load
              # Balancers, omit port_name.
          "protocol": "A String", # The protocol this BackendService uses to communicate
              # with backends.
              #
              # Possible values are HTTP, HTTPS, HTTP2, H2C, TCP, SSL, UDP or GRPC.
              # depending on the chosen load balancer or Traffic Director configuration.
              # Refer to the documentation for the load balancers or for Traffic Director
              # for more information.
              #
              # Must be set to GRPC when the backend service is referenced by a URL map
              # that is bound to target gRPC proxy.
          "region": "A String", # Output only. [Output Only] URL of the region where the regional backend service
              # resides. This field is not applicable to global backend services.
              # You must specify this field as part of the HTTP request URL. It is
              # not settable as a field in the request body.
          "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this
              # backend service.
          "securitySettings": { # The authentication and authorization settings for a BackendService. # This field specifies the security settings that apply to this backend
              # service. This field is applicable to a global backend service with the
              # load_balancing_scheme set to INTERNAL_SELF_MANAGED.
            "authentication": "A String", # [Deprecated] Use clientTlsPolicy instead.
            "awsV4Authentication": { # Contains the configurations necessary to generate a signature for access to # The configuration needed to generate a signature for access to private
                # storage buckets that support AWS's Signature Version 4 for authentication.
                # Allowed only for INTERNET_IP_PORT and INTERNET_FQDN_PORT NEG backends.
                # private storage buckets that support Signature Version 4 for authentication.
                # The service name for generating the authentication header will always default
                # to 's3'.
              "accessKey": "A String", # The access key used for s3 bucket authentication. Required for updating or
                  # creating a backend that uses AWS v4 signature authentication, but will not
                  # be returned as part of the configuration when queried with a REST API GET
                  # request.
                  #
                  # @InputOnly
              "accessKeyId": "A String", # The identifier of an access key used for s3 bucket authentication.
              "accessKeyVersion": "A String", # The optional version identifier for the access key. You can use this to
                  # keep track of different iterations of your access key.
              "originRegion": "A String", # The name of the cloud region of your origin. This is a free-form field with
                  # the name of the region your cloud uses to host your origin.  For example,
                  # "us-east-1" for AWS or "us-ashburn-1" for OCI.
            },
            "clientTlsPolicy": "A String", # Optional. A URL referring to a networksecurity.ClientTlsPolicy resource
                # that describes how clients should authenticate with this service's
                # backends.
                #
                #  clientTlsPolicy only applies to a globalBackendService with the loadBalancingScheme set
                # to INTERNAL_SELF_MANAGED.
                #
                #  If left blank, communications are not encrypted.
            "subjectAltNames": [ # Optional. A list of Subject Alternative Names (SANs) that the client
                # verifies during a mutual TLS handshake with an server/endpoint for thisBackendService. When the server presents its X.509 certificate
                # to the client, the client inspects the certificate'ssubjectAltName field. If the field contains one of the
                # specified values, the communication continues. Otherwise, it fails. This
                # additional check enables the client to verify that the server is authorized
                # to run the requested service.
                #
                #  Note that the contents of the server
                # certificate's subjectAltName field are configured by the
                # Public Key Infrastructure which provisions server identities.
                #
                #  Only applies to a global BackendService withloadBalancingScheme set to INTERNAL_SELF_MANAGED.
                # Only applies when BackendService has an attachedclientTlsPolicy with clientCertificate (mTLS
                # mode).
              "A String",
            ],
          },
          "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
          "serviceBindings": [ # URLs of networkservices.ServiceBinding resources.
              #
              # Can only be set if load balancing scheme is INTERNAL_SELF_MANAGED.
              # If set, lists of backends and health checks must be both empty.
            "A String",
          ],
          "serviceLbPolicy": "A String", # URL to networkservices.ServiceLbPolicy resource.
              #
              # Can only be set if load balancing scheme is EXTERNAL_MANAGED,
              # INTERNAL_MANAGED or INTERNAL_SELF_MANAGED and the scope is global.
          "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
              #
              # Only NONE and HEADER_FIELD are supported
              # when the backend service is referenced by a URL map that is bound to
              # target gRPC proxy that has validateForProxyless field set to true.
              #
              # For more details, see:
              # [Session
              # Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity).
              #
              # sessionAffinity cannot be specified with haPolicy.
          "strongSessionAffinityCookie": { # The HTTP cookie used for stateful session affinity. # Describes the HTTP cookie used for stateful session affinity. This field is
              # applicable and required if the sessionAffinity is set toSTRONG_COOKIE_AFFINITY.
            "name": "A String", # Name of the cookie.
            "path": "A String", # Path to set for the cookie.
            "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
                # as a count of seconds and fractions of seconds at nanosecond
                # resolution. It is independent of any calendar and concepts like "day"
                # or "month". Range is approximately 10,000 years.
              "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                  # Durations less than one second are represented with a 0
                  # `seconds` field and a positive `nanos` field. Must be from 0
                  # to 999,999,999 inclusive.
              "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                  # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                  # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
            },
          },
          "subsetting": { # Subsetting configuration for this BackendService. # subsetting cannot be specified with haPolicy.
              # Currently this is applicable only for Internal TCP/UDP load balancing,
              # Internal HTTP(S) load balancing and Traffic Director.
            "policy": "A String",
            "subsetSize": 42, # The number of backends per backend group assigned to each proxy instance or
                # each service mesh client.
                #
                # An input parameter to the `CONSISTENT_HASH_SUBSETTING` algorithm.
                # Can only be set if `policy` is set to `CONSISTENT_HASH_SUBSETTING`.
                # Can only be set if load balancing scheme is `INTERNAL_MANAGED` or
                # `INTERNAL_SELF_MANAGED`.
                #
                # `subset_size` is optional for Internal HTTP(S) load balancing
                # and required for Traffic Director.
                #
                # If you do not provide this value, Cloud Load Balancing will calculate it
                # dynamically to optimize the number of proxies/clients visible to each
                # backend and vice versa.
                #
                # Must be greater than 0. If `subset_size` is larger than the number of
                # backends/endpoints, then subsetting is disabled.
          },
          "timeoutSec": 42, # The backend service timeout has a different meaning depending on the
              # type of load balancer. For more information see,
              # Backend service settings.
              # The default is 30 seconds.
              # The full range of timeout values allowed goes from 1
              # through 2,147,483,647 seconds.
              #
              # This value can be overridden in the PathMatcher configuration of the
              # UrlMap that references this backend service.
              #
              # Not supported when the backend service is referenced by a URL map that is
              # bound to target gRPC proxy that has validateForProxyless field set to true.
              # Instead, use maxStreamDuration.
          "tlsSettings": { # Configuration for Backend Authenticated TLS and mTLS. May only be specified
              # when the backend protocol is SSL, HTTPS or HTTP2.
            "authenticationConfig": "A String", # Reference to the BackendAuthenticationConfig resource from the
                # networksecurity.googleapis.com namespace. Can be used in authenticating
                # TLS connections to the backend, as specified by the authenticationMode
                # field. Can only be specified if authenticationMode is not NONE.
            "identity": "A String", # Assigns the Managed Identity for the BackendService Workload.
                #
                #
                # Use this property to configure the load balancer back-end to use
                # certificates and roots of trust provisioned by the Managed Workload
                # Identity system.
                #
                #  The `identity` property is the
                # fully-specified SPIFFE ID to use in the SVID presented by the Load
                # Balancer Workload.
                #
                #  The SPIFFE ID must be a resource starting with the
                # `trustDomain` property value, followed by the path to the Managed
                # Workload Identity.
                #
                #  Supported SPIFFE ID format:
                #
                #    - //<trust_domain>/ns/<namespace>/sa/<subject>
                #
                #
                # The Trust Domain within the Managed Identity must refer to a valid
                # Workload Identity Pool. The TrustConfig and CertificateIssuanceConfig
                # will be inherited from the Workload Identity Pool.
                #
                #  Restrictions:
                #
                #    - If you set the `identity` property, you cannot manually set
                #    the following fields:
                #        - tlsSettings.sni
                #       - tlsSettings.subjectAltNames
                #       - tlsSettings.authenticationConfig
                #
                #
                # When defining a `identity` for a RegionBackendServices, the
                # corresponding Workload Identity Pool must have a ca_pool
                # configured in the same region.
                #
                #  The system will set up a read-onlytlsSettings.authenticationConfig for the Managed Identity.
            "sni": "A String", # Server Name Indication - see RFC3546 section 3.1. If set, the load
                # balancer sends this string as the SNI hostname in the TLS connection to
                # the backend, and requires that this string match a Subject Alternative
                # Name (SAN) in the backend's server certificate. With a Regional Internet
                # NEG backend, if the SNI is specified here, the load balancer uses it
                # regardless of whether the Regional Internet NEG is specified with FQDN or
                # IP address and port. When both sni and subjectAltNames[] are specified,
                # the load balancer matches the backend certificate's SAN only to
                # subjectAltNames[].
            "subjectAltNames": [ # A list of Subject Alternative Names (SANs) that the Load Balancer
                # verifies during a TLS handshake with the backend. When the server
                # presents its X.509 certificate to the Load Balancer, the Load Balancer
                # inspects the certificate's SAN field, and requires that at least one SAN
                # match one of the subjectAltNames in the list. This field is limited to 5
                # entries. When both sni and subjectAltNames[] are specified, the load
                # balancer matches the backend certificate's SAN only to subjectAltNames[].
              { # A Subject Alternative Name that the load balancer matches against the SAN
                  # field in the TLS certificate provided by the backend, specified as either
                  # a DNS name or a URI, in accordance with RFC 5280 4.2.1.6
                "dnsName": "A String", # The SAN specified as a DNS Name.
                "uniformResourceIdentifier": "A String", # The SAN specified as a URI.
              },
            ],
          },
          "usedBy": [ # Output only. [Output Only] List of resources referencing given backend service.
            {
              "reference": "A String", # Output only. [Output Only] Server-defined URL for resources referencing given
                  # BackendService like UrlMaps, TargetTcpProxies, TargetSslProxies
                  # and ForwardingRule.
            },
          ],
        },
      ],
      "kind": "compute#usableBackendServiceList", # Output only. [Output Only] Type of resource. Alwayscompute#usableBackendServiceList for lists of usable backend
          # services.
      "nextPageToken": "A String", # [Output Only] This token allows you to get the next page of results for
          # list requests. If the number of results is larger thanmaxResults, use the nextPageToken as a value for
          # the query parameter pageToken in the next list request.
          # Subsequent list requests will have their own nextPageToken to
          # continue paging through the results.
      "selfLink": "A String", # Output only. [Output Only] Server-defined URL for this resource.
      "warning": { # [Output Only] Informational warning message.
        "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute
            # Engine returns NO_RESULTS_ON_PAGE if there
            # are no results in the response.
        "data": [ # [Output Only] Metadata about this warning in key:
            # value format. For example:
            #
            # "data": [
            #   {
            #    "key": "scope",
            #    "value": "zones/us-east1-d"
            #   }
          {
            "key": "A String", # [Output Only] A key that provides more detail on the warning being
                # returned. For example, for warnings where there are no results in a list
                # request for a particular zone, this key might be scope and
                # the key value might be the zone name. Other examples might be a key
                # indicating a deprecated resource and a suggested replacement, or a
                # warning about invalid network settings (for example, if an instance
                # attempts to perform IP forwarding but is not enabled for IP forwarding).
            "value": "A String", # [Output Only] A warning data value corresponding to the key.
          },
        ],
        "message": "A String", # [Output Only] A human-readable description of the warning code.
      },
    }

`listUsable_next()`

    Retrieves the next page of results.

            Args:
              previous_request: The request for the previous page. (required)
              previous_response: The response from the request for the previous page. (required)

            Returns:
              A request object that you can call 'execute()' on to request the next
              page. Returns None if there are no more items in the collection.

`list_next()`

    Retrieves the next page of results.

            Args:
              previous_request: The request for the previous page. (required)
              previous_response: The response from the request for the previous page. (required)

            Returns:
              A request object that you can call 'execute()' on to request the next
              page. Returns None if there are no more items in the collection.

`patch(project, region, backendService, body=None, requestId=None, x__xgafv=None)`

    Updates the specified regional BackendService resource with the data
    included in the request. For more information, see
    Understanding backend services This method
    supports PATCH semantics and uses the JSON merge
    patch format and processing rules.

    Args:
      project: string, Project ID for this request. (required)
      region: string, Name of the region scoping this request. (required)
      backendService: string, Name of the BackendService resource to patch. (required)
      body: object, The request body.
        The object takes the form of:

    { # Represents a Backend Service resource.
        #
        # A backend service defines how Google Cloud load balancers distribute traffic.
        # The backend service configuration contains a set of values, such as the
        # protocol used to connect to backends, various distribution and session
        # settings, health checks, and timeouts. These settings provide fine-grained
        # control over how your load balancer behaves. Most of the settings have
        # default values that allow for easy configuration if you need to get started
        # quickly.
        #
        # Backend services in Google Compute Engine can be either regionally or
        # globally scoped.
        #
        # * [Global](https://cloud.google.com/compute/docs/reference/rest/beta/backendServices)
        # * [Regional](https://cloud.google.com/compute/docs/reference/rest/beta/regionBackendServices)
        #
        # For more information, seeBackend
        # Services.
      "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds. This setting is applicable to Application
          # Load Balancers and Traffic Director and requires
          # GENERATED_COOKIE or HTTP_COOKIE session affinity.
          #
          # If set to 0, the cookie is non-persistent and lasts only until
          # the end of the browser session (or equivalent). The maximum allowed value
          # is two weeks (1,209,600).
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
      "backends": [ # The list of backends that serve this BackendService.
        { # Message containing information of one individual backend.
          "balancingMode": "A String", # Specifies how to determine whether the backend of a load balancer can
              # handle additional traffic or is fully loaded. For usage guidelines, see
              # Connection balancing mode.
              #
              # Backends must use compatible balancing modes. For more information, see
              # Supported balancing modes and target capacity settings and
              # Restrictions and guidance for instance groups.
              #
              # Note: Currently, if you use the API to configure incompatible balancing
              # modes, the configuration might be accepted even though it has no impact
              # and is ignored. Specifically, Backend.maxUtilization is ignored when
              # Backend.balancingMode is RATE. In the future, this incompatible combination
              # will be rejected.
          "capacityScaler": 3.14, # A multiplier applied to the backend's target capacity of its balancing
              # mode.
              # The default value is 1, which means the group serves up to
              # 100% of its configured capacity (depending onbalancingMode). A setting of 0 means the group is
              # completely drained, offering 0% of its available capacity. The valid ranges
              # are 0.0 and [0.1,1.0].
              # You cannot configure a setting larger than 0 and smaller than0.1.
              # You cannot configure a setting of 0 when there is only one
              # backend attached to the backend service.
              #
              # Not available with backends that don't support using abalancingMode. This includes backends such as global
              # internet NEGs, regional serverless NEGs, and PSC NEGs.
          "customMetrics": [ # List of custom metrics that are used for CUSTOM_METRICS
              # BalancingMode.
            { # Custom Metrics are used for CUSTOM_METRICS balancing_mode.
              "dryRun": True or False, # If true, the metric data is collected and reported to Cloud
                  # Monitoring, but is not used for load balancing.
              "maxUtilization": 3.14, # Optional parameter to define a target utilization for the Custom Metrics
                  # balancing mode. The valid range is [0.0, 1.0].
              "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
                  # long and match the regular expression
                  # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
                  # first character must be a lowercase letter, and all following
                  # characters must be a dash, period, underscore, lowercase letter, or
                  # digit, except the last character, which cannot be a dash, period, or
                  # underscore. For usage guidelines, see Custom Metrics balancing mode. This
                  # field can only be used for a global or regional backend service with the
                  # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
            },
          ],
          "description": "A String", # An optional description of this resource. Provide this property when you
              # create the resource.
          "failover": True or False, # This field designates whether this is a failover backend. More than one
              # failover backend can be configured for a given BackendService.
          "group": "A String", # The fully-qualified URL of aninstance
              # group or network endpoint
              # group (NEG) resource. To determine what types of backends a load
              # balancer supports, see the [Backend services
              # overview](https://cloud.google.com/load-balancing/docs/backend-service#backends).
              #
              # You must use the *fully-qualified* URL (starting withhttps://www.googleapis.com/) to specify the instance group
              # or NEG. Partial URLs are not supported.
              #
              # If haPolicy is specified, backends must refer to NEG resources of type
              # GCE_VM_IP.
          "maxConnections": 42, # Defines a target maximum number of simultaneous connections. For usage
              # guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode. Not available if the backend'sbalancingMode is RATE.
          "maxConnectionsPerEndpoint": 42, # Defines a target maximum number of simultaneous connections.  For usage
              # guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isRATE.
          "maxConnectionsPerInstance": 42, # Defines a target maximum number of simultaneous connections.
              # For usage guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isRATE.
          "maxInFlightRequests": 42, # Defines a maximum number of in-flight requests for the whole NEG or
              # instance group. Not available if backend's balancingMode isRATE or CONNECTION.
          "maxInFlightRequestsPerEndpoint": 42, # Defines a maximum number of in-flight requests for a single endpoint.
              # Not available if backend's balancingMode is RATE
              # or CONNECTION.
          "maxInFlightRequestsPerInstance": 42, # Defines a maximum number of in-flight requests for a single VM.
              # Not available if backend's balancingMode is RATE
              # or CONNECTION.
          "maxRate": 42, # Defines a maximum number of HTTP requests per second (RPS). For
              # usage guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxRatePerEndpoint": 3.14, # Defines a maximum target for requests per second (RPS). For usage
              # guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxRatePerInstance": 3.14, # Defines a maximum target for requests per second (RPS). For usage
              # guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxUtilization": 3.14, # Optional parameter to define a target capacity for theUTILIZATION balancing mode. The valid range is[0.0, 1.0].
              #
              # For usage guidelines, seeUtilization
              # balancing mode.
          "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend.
              # the backend.
            "resourceUri": "A String", # The URI of the resource or system that manages the backend.
          },
          "preference": "A String", # This field indicates whether this backend should be fully utilized before
              # sending traffic to backends with default preference. The possible values
              # are:
              #
              #    - PREFERRED: Backends with this preference level will be
              #    filled up to their capacity limits first, based on RTT.
              #    - DEFAULT:  If preferred backends don't have enough
              #    capacity, backends in this layer would be used and traffic would be
              #    assigned based on the load balancing algorithm you use. This is the
              #    default
          "service": "A String", # Represents a service backend (e.g., Cloud Run service, PSC Service
              # Attachment).
              # e.g.
              #  "run.googleapis.com/projects/123456789/locations/us-central1/services/my-service"
              #  for Cloud Run service.
              #  "compute.googleapis.com/projects/123456789/regions/us-central1/serviceAttachments/my-service-attachment"
              #  for PSC Service Attachment.
          "trafficDuration": "A String",
        },
      ],
      "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService. Only available for
          # specified load balancer types.
        "bypassCacheOnRequestHeaders": [ # Bypass the cache when the specified request headers are matched - e.g.
            # Pragma or Authorization headers. Up to 5 headers can be specified.
            # The cache is bypassed for all cdnPolicy.cacheMode settings.
          { # Bypass the cache when the specified request headers are present,
              # e.g. Pragma or Authorization headers. Values are case insensitive.
              # The presence of such a header overrides the cache_mode setting.
            "headerName": "A String", # The header field name to match on when bypassing cache.
                # Values are case-insensitive.
          },
        ],
        "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud # The CacheKeyPolicy for this CdnPolicy.
            # CDN.
          "includeHost": True or False, # If true, requests to different hosts will be cached separately.
          "includeHttpHeaders": [ # Allows HTTP request headers (by name) to be used in the cache key.
            "A String",
          ],
          "includeNamedCookies": [ # Allows HTTP cookies (by name) to be used in the cache key.
              # The name=value pair will be used in the cache key Cloud CDN generates.
            "A String",
          ],
          "includeProtocol": True or False, # If true, http and https requests will be cached separately.
          "includeQueryString": True or False, # If true, include query string parameters in the cache key according to
              # query_string_whitelist and query_string_blacklist. If neither is set, the
              # entire query string will be included. If false, the query string will be
              # excluded from the cache key entirely.
          "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other
              # parameters will be included. Either specify query_string_whitelist or
              # query_string_blacklist, not both. '&' and '=' will be percent encoded and
              # not treated as delimiters.
            "A String",
          ],
          "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other
              # parameters will be excluded. Either specify query_string_whitelist or
              # query_string_blacklist, not both. '&' and '=' will be percent encoded and
              # not treated as delimiters.
            "A String",
          ],
        },
        "cacheMode": "A String", # Specifies the cache setting for all responses from this backend.
            # The possible values are:USE_ORIGIN_HEADERS Requires the origin to set valid caching
            # headers to cache content. Responses without these headers will not be
            # cached at Google's edge, and will require a full trip to the origin on
            # every request, potentially impacting performance and increasing load on
            # the origin server.FORCE_CACHE_ALL Cache all content, ignoring any "private",
            # "no-store" or "no-cache" directives in Cache-Control response headers.
            # Warning: this may result in Cloud CDN caching private,
            # per-user (user identifiable) content.CACHE_ALL_STATIC Automatically cache static content,
            # including common image formats, media (video and audio), and web assets
            # (JavaScript and CSS). Requests and responses that are marked as
            # uncacheable, as well as dynamic content (including HTML), will not be
            # cached.
            #
            # If no value is provided for cdnPolicy.cacheMode, it defaults
            # to CACHE_ALL_STATIC.
        "clientTtl": 42, # Specifies a separate client (e.g. browser client) maximum TTL. This is
            # used to clamp the max-age (or Expires) value sent to the client.  With
            # FORCE_CACHE_ALL, the lesser of client_ttl and default_ttl is used for the
            # response max-age directive, along with a "public" directive.  For
            # cacheable content in CACHE_ALL_STATIC mode, client_ttl clamps the max-age
            # from the origin (if specified), or else sets the response max-age
            # directive to the lesser of the client_ttl and default_ttl, and also
            # ensures a "public" cache-control directive is present.
            # If a client TTL is not specified, a default value (1 hour) will be used.
            # The maximum allowed value is 31,622,400s (1 year).
        "defaultTtl": 42, # Specifies the default TTL for cached content served by this origin for
            # responses that do not have an existing valid TTL (max-age or s-maxage).
            # Setting a TTL of "0" means "always revalidate".
            # The value of defaultTTL cannot be set to a value greater than that of
            # maxTTL, but can be equal.
            # When the cacheMode is set to FORCE_CACHE_ALL, the defaultTTL
            # will overwrite the TTL set in all responses. The maximum allowed value is
            # 31,622,400s (1 year), noting that infrequently accessed objects may be
            # evicted from the cache before the defined TTL.
        "maxTtl": 42, # Specifies the maximum allowed TTL for cached content served by this
            # origin.
            # Cache directives that attempt to set a max-age or s-maxage higher than
            # this, or an Expires header more than maxTTL seconds in the future will
            # be capped at the value of maxTTL, as if it were the value of an
            # s-maxage Cache-Control directive.
            # Headers sent to the client will not be modified.
            # Setting a TTL of "0" means "always revalidate".
            # The maximum allowed value is 31,622,400s (1 year), noting that
            # infrequently accessed objects may be evicted from the cache before
            # the defined TTL.
        "negativeCaching": True or False, # Negative caching allows per-status code TTLs to be set, in order
            # to apply fine-grained caching for common errors or redirects.
            # This can reduce the load on your origin and improve end-user
            # experience by reducing response latency.
            # When the cache mode is set to CACHE_ALL_STATIC or USE_ORIGIN_HEADERS,
            # negative caching applies to responses with the specified response code
            # that lack any Cache-Control, Expires, or Pragma: no-cache directives.
            # When the cache mode is set to FORCE_CACHE_ALL, negative caching applies
            # to all responses with the specified response code, and override any
            # caching headers.
            # By default, Cloud CDN will apply the following default TTLs to these
            # status codes:
            # HTTP 300 (Multiple Choice), 301, 308 (Permanent Redirects): 10m
            # HTTP 404 (Not Found), 410 (Gone),
            # 451 (Unavailable For Legal Reasons): 120s
            # HTTP 405 (Method Not Found), 501 (Not Implemented): 60s.
            # These defaults can be overridden in negative_caching_policy.
        "negativeCachingPolicy": [ # Sets a cache TTL for the specified HTTP status code.
            # negative_caching must be enabled to configure negative_caching_policy.
            # Omitting the policy and leaving negative_caching enabled will use
            # Cloud CDN's default cache TTLs.
            # Note that when specifying an explicit negative_caching_policy, you
            # should take care to specify a cache TTL for all response codes
            # that you wish to cache. Cloud CDN will not apply any default
            # negative caching when a policy exists.
          { # Specify CDN TTLs for response error codes.
            "code": 42, # The HTTP status code to define a TTL against. Only HTTP status codes
                # 300, 301, 302, 307, 308, 404, 405, 410, 421, 451 and 501 can be
                # specified as values, and you cannot specify a status code more than
                # once.
            "ttl": 42, # The TTL (in seconds) for which to cache responses with the
                # corresponding status code.
                # The maximum allowed value is 1800s (30 minutes), noting that
                # infrequently accessed objects may be evicted from the cache before the
                # defined TTL.
          },
        ],
        "requestCoalescing": True or False, # If true then Cloud CDN will combine multiple concurrent cache fill
            # requests into a small number of requests to the origin.
        "serveWhileStale": 42, # Serve existing content from the cache (if available) when revalidating
            # content with the origin, or when an error is encountered when refreshing
            # the cache.
            # This setting defines the default "max-stale" duration for any cached
            # responses that do not specify a max-stale directive. Stale responses that
            # exceed the TTL configured here will not be served. The default limit
            # (max-stale) is 86400s (1 day), which will allow stale content to be
            # served up to this limit beyond the max-age (or s-maxage) of a cached
            # response.
            # The maximum allowed value is 604800 (1 week).
            # Set this to zero (0) to disable serve-while-stale.
        "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be
            # considered fresh. After this time period, the response will be
            # revalidated before being served. Defaults to 1hr (3600s).  When serving
            # responses to signed URL requests, Cloud CDN will internally behave as
            # though all responses from this backend had a "Cache-Control:
            # public, max-age=[TTL]" header, regardless of any existing
            # Cache-Control header. The actual headers served in responses will not be
            # altered.
        "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
          "A String",
        ],
      },
      "circuitBreakers": { # Settings controlling the volume of requests, connections and retries to this
          # backend service.
        "connectTimeout": { # A Duration represents a fixed-length span of time represented # The timeout for new network connections to hosts.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "maxConnections": 42, # The maximum number of connections to the backend service. If not specified,
            # there is no limit.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxPendingRequests": 42, # The maximum number of pending requests allowed to the backend service. If
            # not specified, there is no limit.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxRequests": 42, # The maximum number of parallel requests that allowed to the backend
            # service. If not specified, there is no limit.
        "maxRequestsPerConnection": 42, # Maximum requests for a single connection to the backend service.
            # This parameter is respected by both the HTTP/1.1 and HTTP/2
            # implementations. If not specified, there is no limit. Setting this
            # parameter to 1 will effectively disable keep alive.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxRetries": 42, # The maximum number of parallel retries allowed to the backend cluster. If
            # not specified, the default is 1.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
      },
      "compressionMode": "A String", # Compress text responses using Brotli or gzip compression, based on
          # the client's Accept-Encoding header.
      "connectionDraining": { # Message containing connection draining configuration. # connectionDraining cannot be specified with haPolicy.
        "drainingTimeoutSec": 42, # Configures a duration timeout for existing requests on a removed backend
            # instance. For supported load balancers and protocols, as described inEnabling
            # connection draining.
      },
      "connectionTrackingPolicy": { # Connection Tracking configuration for this BackendService. # Connection Tracking configuration for this BackendService. Connection
          # tracking policy settings are only available for external passthrough
          # Network Load Balancers and internal passthrough Network Load Balancers.
          #
          # connectionTrackingPolicy cannot be specified with haPolicy.
        "connectionPersistenceOnUnhealthyBackends": "A String", # Specifies connection persistence when backends are unhealthy. The default
            # value is DEFAULT_FOR_PROTOCOL.
            #
            # If set to DEFAULT_FOR_PROTOCOL, the existing connections
            # persist on unhealthy backends only for connection-oriented protocols
            # (TCP and SCTP) and only if the Tracking Mode isPER_CONNECTION (default tracking mode) or the Session
            # Affinity is configured for 5-tuple. They do not persist forUDP.
            #
            # If set to NEVER_PERSIST, after a backend becomes unhealthy,
            # the existing connections on the unhealthy backend are never persisted on
            # the unhealthy backend. They are always diverted to newly selected healthy
            # backends (unless all backends are unhealthy).
            #
            # If set to ALWAYS_PERSIST, existing connections always
            # persist on unhealthy backends regardless of protocol and session
            # affinity. It is generally not recommended to use this mode overriding the
            # default.
            #
            # For more details, see [Connection Persistence for Network Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#connection-persistence)
            # and [Connection Persistence for Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal#connection-persistence).
        "enableStrongAffinity": True or False, # Enable Strong Session Affinity for external passthrough Network Load
            # Balancers. This option is not available publicly.
        "idleTimeoutSec": 42, # Specifies how long to keep a Connection Tracking entry while there is no
            # matching traffic (in seconds).
            #
            # For internal passthrough Network Load Balancers:
            #
            #    - The minimum (default) is 10 minutes and the maximum is 16 hours.
            #    - It can be set only if Connection Tracking is less than 5-tuple
            #    (i.e. Session Affinity is CLIENT_IP_NO_DESTINATION,CLIENT_IP or CLIENT_IP_PROTO, and Tracking
            #    Mode is PER_SESSION).
            #
            #
            #
            # For external passthrough Network Load Balancers the default is 60
            # seconds. This option is not available publicly.
        "trackingMode": "A String", # Specifies the key used for connection tracking. There are two
            # options:
            #
            #    - PER_CONNECTION: This is the default mode. The Connection
            #    Tracking is performed as per the Connection Key (default Hash Method) for
            #    the specific protocol.
            #    - PER_SESSION: The Connection Tracking is performed as per
            #    the configured Session Affinity. It matches the configured Session
            #    Affinity.
            #
            #
            #
            # For more details, see [Tracking Mode for Network Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#tracking-mode)
            # and [Tracking Mode for Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal#tracking-mode).
      },
      "consistentHash": { # This message defines settings for a consistent hash style load balancer. # Consistent Hash-based load balancing can be used to provide soft session
          # affinity based on HTTP headers, cookies or other properties. This load
          # balancing policy is applicable only for HTTP connections. The affinity to a
          # particular destination host will be lost when one or more hosts are
          # added/removed from the destination service. This field specifies parameters
          # that control consistent hashing. This field is only applicable whenlocalityLbPolicy is set to MAGLEV orRING_HASH.
          #
          # This field is applicable to either:
          #
          #    - A regional backend service with the service protocol set to HTTP,
          #    HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
          #    INTERNAL_MANAGED.
          #    - A global backend service with the
          #    load_balancing_scheme set to INTERNAL_SELF_MANAGED.
        "httpCookie": { # The information about the HTTP Cookie on which the hash function is based # Hash is based on HTTP Cookie. This field describes a HTTP cookie that will
            # be used as the hash key for the consistent hash load balancer. If the
            # cookie is not present, it will be generated. This field is applicable if
            # the sessionAffinity is set to HTTP_COOKIE.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
            # for load balancing policies that use a consistent hash.
          "name": "A String", # Name of the cookie.
          "path": "A String", # Path to set for the cookie.
          "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
              # as a count of seconds and fractions of seconds at nanosecond
              # resolution. It is independent of any calendar and concepts like "day"
              # or "month". Range is approximately 10,000 years.
            "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                # Durations less than one second are represented with a 0
                # `seconds` field and a positive `nanos` field. Must be from 0
                # to 999,999,999 inclusive.
            "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
          },
        },
        "httpHeaderName": "A String", # The hash based on the value of the specified header field. This field is
            # applicable if the sessionAffinity is set toHEADER_FIELD.
        "minimumRingSize": "A String", # The minimum number of virtual nodes to use for the hash ring. Defaults to
            # 1024. Larger ring sizes result in more granular load distributions. If the
            # number of hosts in the load balancing pool is larger than the ring size,
            # each host will be assigned a single virtual node.
      },
      "creationTimestamp": "A String", # Output only. [Output Only] Creation timestamp inRFC3339
          # text format.
      "customMetrics": [ # List of custom metrics that are used for theWEIGHTED_ROUND_ROBIN locality_lb_policy.
        { # Custom Metrics are used for WEIGHTED_ROUND_ROBIN
            # locality_lb_policy.
          "dryRun": True or False, # If true, the metric data is not used for load balancing.
          "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
              # long and match the regular expression
              # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
              # first character must be a lowercase letter, and all following
              # characters must be a dash, period, underscore, lowercase letter, or
              # digit, except the last character, which cannot be a dash, period, or
              # underscore. For usage guidelines, see Custom Metrics balancing mode. This
              # field can only be used for a global or regional backend service with the
              # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
        },
      ],
      "customRequestHeaders": [ # Headers that the load balancer adds to proxied requests. See [Creating
          # custom
          # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
        "A String",
      ],
      "customResponseHeaders": [ # Headers that the load balancer adds to proxied responses. See [Creating
          # custom
          # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
        "A String",
      ],
      "description": "A String", # An optional description of this resource. Provide this property when you
          # create the resource.
      "dynamicForwarding": { # Defines a dynamic forwarding configuration for the backend service. # Dynamic forwarding configuration. This field is used to configure the
          # backend service with dynamic forwarding feature which together with Service
          # Extension allows customized and complex routing logic.
        "forwardProxy": { # Defines Dynamic Forwarding Proxy configuration. # Dynamic Forwarding Proxy configuration.
          "enabled": True or False, # A boolean flag enabling dynamic forwarding proxy.
          "proxyMode": "A String", # Determines the dynamic forwarding proxy mode.
        },
        "ipPortSelection": { # Defines a IP:PORT based dynamic forwarding configuration for the backend # IP:PORT based dynamic forwarding configuration.
            # service. Some ranges are restricted: Restricted
            # ranges.
          "enabled": True or False, # A boolean flag enabling IP:PORT based dynamic forwarding.
        },
      },
      "edgeSecurityPolicy": "A String", # [Output Only] The resource URL for the edge security policy associated with
          # this backend service.
      "enableCDN": True or False, # If true, enables Cloud CDN for the backend service of a
          # global external Application Load Balancer.
      "externalManagedMigrationState": "A String", # Specifies the canary migration state. Possible values are PREPARE,
          # TEST_BY_PERCENTAGE, and TEST_ALL_TRAFFIC.
          #
          # To begin the migration from EXTERNAL to EXTERNAL_MANAGED, the state must be
          # changed to PREPARE. The state must be changed to TEST_ALL_TRAFFIC before
          # the loadBalancingScheme can be changed to EXTERNAL_MANAGED. Optionally, the
          # TEST_BY_PERCENTAGE state can be used to migrate traffic by percentage using
          # externalManagedMigrationTestingPercentage.
          #
          # Rolling back a migration requires the states to be set in reverse order. So
          # changing the scheme from EXTERNAL_MANAGED to EXTERNAL requires the state to
          # be set to TEST_ALL_TRAFFIC at the same time. Optionally, the
          # TEST_BY_PERCENTAGE state can be used to migrate some traffic back to
          # EXTERNAL or PREPARE can be used to migrate all traffic back to EXTERNAL.
      "externalManagedMigrationTestingPercentage": 3.14, # Determines the fraction of requests that should be processed by the Global
          # external Application Load Balancer.
          #
          # The value of this field must be in the range [0, 100].
          #
          # Session affinity options will slightly affect this routing behavior, for
          # more details, see:Session
          # Affinity.
          #
          # This value can only be set if the loadBalancingScheme in the BackendService
          # is set to EXTERNAL (when using the classic Application Load Balancer) and
          # the migration state is TEST_BY_PERCENTAGE.
      "failoverPolicy": { # For load balancers that have configurable # Requires at least one backend instance group to be defined
          # as a backup (failover) backend.
          # For load balancers that have configurable failover:
          # [Internal passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
          # and [external passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
          #
          # failoverPolicy cannot be specified with haPolicy.
          # failover:
          # [Internal passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
          # and [external passthrough
          # Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
          # On failover or failback, this field indicates whether connection draining
          # will be honored. Google Cloud has a fixed connection draining timeout of
          # 10 minutes. A setting of true terminates existing TCP
          # connections to the active pool during failover and failback, immediately
          # draining traffic. A setting of false allows existing TCP
          # connections to persist, even on VMs no longer in the active pool, for up
          # to the duration of the connection draining timeout (10 minutes).
        "disableConnectionDrainOnFailover": True or False, # This can be set to true if the protocol isTCP, UDP, or UNSPECIFIED.
            #
            # The default is false.
        "dropTrafficIfUnhealthy": True or False, # If set to true, connections to the
            # load balancer are dropped when all primary and all backup backend VMs are
            # unhealthy.If set to false, connections are distributed
            # among all primary VMs when all primary and all backup backend VMs are
            #  unhealthy.
            # For load balancers that have configurable
            # failover:
            # [Internal passthrough
            # Network Load
            # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
            # and [external passthrough
            # Network Load
            # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
            # The default is false.
        "failoverRatio": 3.14, # The value of the field must be in the range[0, 1]. If the value is 0, the load balancer performs a
            # failover when the number of healthy primary VMs equals zero.
            # For all other values, the load balancer performs a failover when the
            # total number of healthy primary VMs is less than this ratio.
            # For load balancers that have configurable
            # failover:
            # [Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
            # and [external TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
      },
      "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object.
          # This field is used in optimistic locking. This field will be ignored when
          # inserting a BackendService. An up-to-date fingerprint must be provided in
          # order to update the BackendService, otherwise the request will
          # fail with error 412 conditionNotMet.
          #
          # To see the latest fingerprint, make a get() request to
          # retrieve a BackendService.
      "haPolicy": { # Configures self-managed High Availability (HA) for External and Internal
          # Protocol Forwarding.
          #
          # The backends of this regional backend service must only specify zonal
          # network endpoint groups (NEGs) of type GCE_VM_IP.
          #
          # When haPolicy is set for an Internal Passthrough Network Load Balancer, the
          # regional backend service must set the network field. All zonal NEGs must
          # belong to the same network. However, individual NEGs can
          # belong to different subnetworks of that network.
          #
          # When haPolicy is specified, the set of attached network endpoints across
          # all backends comprise an High Availability domain from which one endpoint
          # is selected as the active endpoint (the leader) that receives all
          # traffic.
          #
          # haPolicy can be added only at backend service creation time. Once set up,
          # it cannot be deleted.
          #
          # Note that haPolicy is not for load balancing, and therefore cannot be
          # specified with sessionAffinity, connectionTrackingPolicy, and
          # failoverPolicy.
          #
          # haPolicy requires customers to be responsible for tracking backend
          # endpoint health and electing a leader among the healthy endpoints.
          # Therefore, haPolicy cannot be specified with healthChecks.
          #
          # haPolicy can only be specified for External Passthrough Network Load
          # Balancers and Internal Passthrough Network Load Balancers.
        "fastIPMove": "A String", # Specifies whether fast IP move is enabled, and if so, the mechanism to
            # achieve it.
            #
            # Supported values are:
            #
            #    - DISABLED: Fast IP Move is disabled. You can only use the
            #    haPolicy.leader API to update the leader.
            #    - >GARP_RA: Provides a method to very quickly define a new network
            #    endpoint as the leader. This method is faster than updating the leader
            #    using the haPolicy.leader API. Fast IP move works as follows: The VM
            #    hosting the network endpoint that should become the new leader sends
            #    either a Gratuitous ARP (GARP) packet (IPv4) or an ICMPv6 Router
            #    Advertisement(RA) packet (IPv6).  Google Cloud immediately but
            #    temporarily associates the forwarding rule IP address with that VM, and
            #    both new and in-flight packets are quickly delivered to that VM.
            #
            #
            #
            # Note the important properties of the Fast IP Move functionality:
            #
            #    - The GARP/RA-initiated re-routing stays active for approximately 20
            #    minutes. After triggering fast failover, you must also
            #    appropriately set the haPolicy.leader.
            #    -  The new leader instance should continue to send GARP/RA packets
            #    periodically every 10 seconds until at least 10 minutes after updating
            #    the haPolicy.leader (but stop immediately if it is no longer the leader).
            #    - After triggering a fast failover, we recommend that you wait at least
            #    3 seconds before sending another GARP/RA packet from a different VM
            #    instance to avoid race conditions.
            #    - Don't send GARP/RA packets from different VM
            #    instances at the same time. If multiple instances continue to send
            #    GARP/RA packets, traffic might be routed to different destinations in an
            #    alternating order. This condition ceases when a single instance
            #    issues a GARP/RA packet.
            #    - The GARP/RA request always takes priority over the leader API.
            #    Using the haPolicy.leader API to change the leader to a different
            #    instance will have no effect until the GARP/RA request becomes
            #    inactive.
            #    - The GARP/RA packets should follow the GARP/RA
            #    Packet Specifications..
            #    -  When multiple forwarding rules refer to a regional backend service,
            #    you need only send a GARP or RA packet for a single forwarding rule
            #    virtual IP. The virtual IPs for all forwarding rules targeting the same
            #    backend service will also be moved to the sender of the GARP or RA
            #    packet.
            #
            #
            #
            # The following are the Fast IP Move limitations (that is, when fastIPMove
            # is not DISABLED):
            #
            #    - Multiple forwarding rules cannot use the same IP address if one of
            #    them refers to a regional backend service with fastIPMove.
            #    - The regional backend service must set the network field, and all
            #    NEGs must belong to that network. However, individual
            #    NEGs can belong to different subnetworks of that network.
            #    - The maximum number of network endpoints across all backends of a
            #    backend service with fastIPMove is 32.
            #    - The maximum number of backend services with fastIPMove that can have
            #    the same network endpoint attached to one of its backends is 64.
            #    - The maximum number of backend services with fastIPMove in a VPC in a
            #    region is 64.
            #    - The network endpoints that are attached to a backend of a backend
            #    service with fastIPMove cannot resolve to Gen3+ machines for IPv6.
            #    - Traffic directed to the leader by a static route next hop will not be
            #    redirected to a new leader by fast failover. Such traffic will only be
            #    redirected once an haPolicy.leader update has taken effect. Only traffic
            #    to the forwarding rule's virtual IP will be redirected to a new leader by
            #    fast failover.
            #
            #
            # haPolicy.fastIPMove can be set only at backend service creation time.
            # Once set, it cannot be updated.
            #
            # By default, fastIpMove is set to DISABLED.
        "leader": { # Selects one of the network endpoints attached to the backend NEGs of
            # this service as the active endpoint (the leader) that receives all
            # traffic.
            #
            # When the leader changes, there is no connection draining to persist
            # existing connections on the old leader.
            #
            # You are responsible for selecting a suitable endpoint as the
            # leader. For example, preferring a healthy endpoint over unhealthy ones.
            # Note that this service does not track backend endpoint health, and
            # selects the configured leader unconditionally.
          "backendGroup": "A String", # A fully-qualified URL (starting with https://www.googleapis.com/)
              # of the zonal Network Endpoint Group (NEG) with `GCE_VM_IP` endpoints
              # that the leader is attached to.
              #
              # The leader's backendGroup must already be specified as a backend of
              # this backend service. Removing a backend that is designated as the
              # leader's backendGroup is not permitted.
          "networkEndpoint": { # The network endpoint within the leader.backendGroup that is
              # designated as the leader.
              #
              # This network endpoint cannot be detached from the NEG specified in
              # the haPolicy.leader.backendGroup until the leader is updated with
              # another network endpoint, or the leader is removed from the haPolicy.
            "instance": "A String", # The name of the VM instance of the leader network endpoint. The
                # instance must already be attached to the NEG specified in the
                # haPolicy.leader.backendGroup.
                #
                # The name must be 1-63 characters long, and comply with RFC1035.
                # Authorization requires the following IAM permission on the
                # specified resource instance: compute.instances.use
          },
        },
      },
      "healthChecks": [ # The list of URLs to the healthChecks, httpHealthChecks (legacy), or
          # httpsHealthChecks (legacy) resource for health checking this backend
          # service. Not all backend services support legacy health checks. See
          # Load balancer guide. Currently, at most one health check can be
          # specified for each backend service. Backend services with
          # instance group or zonal NEG backends must have a health check unless
          # haPolicy is specified. Backend services with internet or serverless NEG
          # backends must not have a health check.
          #
          # healthChecks[] cannot be specified with haPolicy.
        "A String",
      ],
      "iap": { # Identity-Aware Proxy # The configurations for Identity-Aware Proxy on this resource.
          # Not available for internal passthrough Network Load Balancers and external
          # passthrough Network Load Balancers.
        "enabled": True or False, # Whether the serving infrastructure will authenticate and authorize all
            # incoming requests.
        "oauth2ClientId": "A String", # OAuth2 client ID to use for the authentication flow.
        "oauth2ClientSecret": "A String", # OAuth2 client secret to use for the authentication flow.
            # For security reasons, this value cannot be retrieved via the API.
            # Instead, the SHA-256 hash of the value is returned in the
            # oauth2ClientSecretSha256 field.
            #
            # @InputOnly
        "oauth2ClientSecretSha256": "A String", # Output only. [Output Only] SHA256 hash value for the field oauth2_client_secret above.
      },
      "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is
          # defined by the server.
      "ipAddressSelectionPolicy": "A String", # Specifies a preference for traffic sent from the proxy to the backend (or
          # from the client to the backend for proxyless gRPC).
          # The possible values are:
          #
          #    - IPV4_ONLY: Only send IPv4 traffic to the backends of the
          #    backend service (Instance Group, Managed Instance Group, Network Endpoint
          #    Group), regardless of traffic from the client to the proxy. Only IPv4
          #    health checks are used to check the health of the backends. This is the
          #    default setting.
          #    - PREFER_IPV6: Prioritize the connection to the endpoint's
          #    IPv6 address over its IPv4 address (provided there is a healthy IPv6
          #    address).
          #    - IPV6_ONLY: Only send IPv6 traffic to the backends of the
          #    backend service (Instance Group, Managed Instance Group, Network Endpoint
          #    Group), regardless of traffic from the client to the proxy. Only IPv6
          #    health checks are used to check the health of the backends.
          #
          #
          #
          # This field is applicable to either:
          #
          #    -  Advanced global external Application Load Balancer (load balancing
          #    scheme EXTERNAL_MANAGED),
          #    -  Regional external Application Load
          #    Balancer,
          #    -  Internal proxy Network Load Balancer (load balancing
          #    scheme INTERNAL_MANAGED),
          #    -  Regional internal Application Load
          #    Balancer (load balancing scheme INTERNAL_MANAGED),
          #    -  Traffic
          #    Director with Envoy proxies and proxyless gRPC (load balancing scheme
          #    INTERNAL_SELF_MANAGED).
      "kind": "compute#backendService", # Output only. [Output Only] Type of resource. Always compute#backendService
          # for backend services.
      "loadBalancingScheme": "A String", # Specifies the load balancer type. A backend service
          # created for one type of load balancer cannot be used with another.
          # For more information, refer toChoosing
          # a load balancer.
      "localityLbPolicies": [ # A list of locality load-balancing policies to be used in order of
          # preference. When you use localityLbPolicies, you must set at least one
          # value for either the localityLbPolicies[].policy or the
          # localityLbPolicies[].customPolicy field. localityLbPolicies overrides any
          # value set in the localityLbPolicy field.
          #
          # For an example of how to use this field, seeDefine
          # a list of preferred policies.
          #
          # Caution: This field and its children are intended for use in a service mesh
          # that includes gRPC clients only. Envoy proxies can't use backend services
          # that have this configuration.
        { # Container for either a built-in LB policy supported by gRPC or Envoy or
            # a custom one implemented by the end user.
          "customPolicy": { # The configuration for a custom policy implemented by the user and
              # deployed with the client.
            "data": "A String", # An optional, arbitrary JSON object with configuration data, understood
                # by a locally installed custom policy implementation.
            "name": "A String", # Identifies the custom policy.
                #
                # The value should match the name of a custom implementation registered
                # on the gRPC clients. It should follow protocol buffer message naming
                # conventions and include the full path (for example,
                # myorg.CustomLbPolicy). The maximum length is 256 characters.
                #
                # Do not specify the same custom policy more than once for a
                # backend. If you do, the configuration is rejected.
                #
                # For an example of how to use this field, seeUse
                # a custom policy.
          },
          "policy": { # The configuration for a built-in load balancing policy.
            "name": "A String", # The name of a locality load-balancing policy. Valid values include
                # ROUND_ROBIN and, for Java clients, LEAST_REQUEST. For information
                # about these values, see the description of localityLbPolicy.
                #
                # Do not specify the same policy more than once for a
                # backend. If you do, the configuration is rejected.
          },
        },
      ],
      "localityLbPolicy": "A String", # The load balancing algorithm used within the scope of the locality. The
          # possible values are:
          #
          #    - ROUND_ROBIN: This is a simple policy in which each healthy
          #    backend is selected in round robin order. This is the default.
          #    - LEAST_REQUEST: An O(1) algorithm which
          #    selects two random healthy hosts and picks the host which has fewer active
          #    requests.
          #    - RING_HASH: The ring/modulo hash load balancer implements
          #    consistent hashing to backends. The algorithm has the property that the
          #    addition/removal of a host from a set of N hosts only affects 1/N of the
          #    requests.
          #    - RANDOM: The load balancer selects a random healthy
          #    host.
          #    - ORIGINAL_DESTINATION: Backend host is selected
          #    based on the client connection metadata, i.e., connections are opened to
          #    the same address as the destination address of the incoming connection
          #    before the connection was redirected to the load balancer.
          #    - MAGLEV: used as a drop in replacement for the ring hash
          #    load balancer. Maglev is not as stable as ring hash but has faster table
          #    lookup build times and host selection times. For more information about
          #    Maglev, see Maglev:
          #    A Fast and Reliable Software Network Load Balancer.
          #    - WEIGHTED_ROUND_ROBIN: Per-endpoint Weighted Round Robin
          #    Load Balancing using weights computed from Backend reported Custom Metrics.
          #    If set, the Backend Service responses are expected to contain non-standard
          #    HTTP response header field Endpoint-Load-Metrics. The reported
          #    metrics to use for computing the weights are specified via thecustomMetrics field.
          #
          #    This field is applicable to either:
          #       - A regional backend service with the service protocol set to HTTP,
          #       HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
          #       INTERNAL_MANAGED.
          #       - A global backend service with the
          #       load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or
          #       EXTERNAL_MANAGED.
          #
          #
          #    If sessionAffinity is not configured—that is, if session
          #    affinity remains at the default value of NONE—then the
          #    default value for localityLbPolicy
          #    is ROUND_ROBIN. If session affinity is set to a value other
          #    than NONE,
          #    then the default value for localityLbPolicy isMAGLEV.
          #
          #    Only ROUND_ROBIN and RING_HASH are supported
          #    when the backend service is referenced by a URL map that is bound to
          #    target gRPC proxy that has validateForProxyless field set to true.
          #
          #    localityLbPolicy cannot be specified with haPolicy.
      "logConfig": { # The available logging options for the load balancer traffic served by this # This field denotes the logging options for the load balancer traffic served
          # by this backend service. If logging is enabled, logs will be exported to
          # Stackdriver.
          # backend service.
        "enable": True or False, # Denotes whether to enable logging for the load balancer
            # traffic served by this backend service. The default value is false.
        "optionalFields": [ # This field can only be specified if logging is enabled for this backend
            # service and "logConfig.optionalMode" was set to CUSTOM. Contains a list
            # of optional fields you want to include in the logs. For example:
            # serverInstance, serverGkeDetails.cluster,
            # serverGkeDetails.pod.podNamespace
          "A String",
        ],
        "optionalMode": "A String", # This field can only be specified if logging is enabled for this backend
            # service. Configures whether all, none or a subset of optional fields
            # should be added to the reported logs. One of [INCLUDE_ALL_OPTIONAL,
            # EXCLUDE_ALL_OPTIONAL, CUSTOM]. Default is EXCLUDE_ALL_OPTIONAL.
        "sampleRate": 3.14, # This field can only be specified if logging is enabled for this backend
            # service. The value of the field must be in [0, 1]. This configures the
            # sampling rate of requests to the load balancer where 1.0 means all logged
            # requests are reported and 0.0 means no logged requests are reported. The
            # default value is 1.0.
      },
      "maxStreamDuration": { # A Duration represents a fixed-length span of time represented # Specifies the default maximum duration (timeout) for streams to this
          # service. Duration is computed from the beginning of the stream until the
          # response has been completely processed, including all retries. A stream
          # that does not complete in this duration is closed.
          #
          # If not specified, there will be no timeout limit, i.e. the maximum
          # duration is infinite.
          #
          # This value can be overridden in the PathMatcher configuration of the
          # UrlMap that references this backend service.
          #
          # This field is only allowed when the loadBalancingScheme of
          # the backend service is INTERNAL_SELF_MANAGED.
          # as a count of seconds and fractions of seconds at nanosecond
          # resolution. It is independent of any calendar and concepts like "day"
          # or "month". Range is approximately 10,000 years.
        "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
            # Durations less than one second are represented with a 0
            # `seconds` field and a positive `nanos` field. Must be from 0
            # to 999,999,999 inclusive.
        "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
            # to 315,576,000,000 inclusive. Note: these bounds are computed from:
            # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
      },
      "metadatas": { # Deployment metadata associated with the resource to be set by a GKE hub
          # controller and read by the backend RCTH
        "a_key": "A String",
      },
      "name": "A String", # Name of the resource. Provided by the client when the resource is created.
          # The name must be 1-63 characters long, and comply withRFC1035.
          # Specifically, the name must be 1-63 characters long and match the regular
          # expression `[a-z]([-a-z0-9]*[a-z0-9])?` which means the first
          # character must be a lowercase letter, and all following characters must
          # be a dash, lowercase letter, or digit, except the last character, which
          # cannot be a dash.
      "network": "A String", # The URL of the network to which this backend service belongs.
          #
          # This field must be set for Internal Passthrough Network Load Balancers when
          # the haPolicy is enabled, and for External Passthrough Network Load
          # Balancers when the haPolicy fastIpMove is enabled.
          #
          # This field can only be specified when the load balancing scheme is set toINTERNAL, or when the load balancing scheme is set toEXTERNAL and haPolicy fastIpMove is enabled.
      "networkPassThroughLbTrafficPolicy": { # Configures traffic steering properties of internal passthrough Network
          # Load Balancers.
          #
          # networkPassThroughLbTrafficPolicy cannot be specified with haPolicy.
        "zonalAffinity": { # When configured, new connections are load balanced across healthy backend
            # endpoints in the local zone.
          "spillover": "A String", # This field indicates whether zonal affinity is enabled or not. The
              # possible values are:
              #
              #    - ZONAL_AFFINITY_DISABLED: Default Value. Zonal Affinity
              #    is disabled. The load balancer distributes new connections to all
              #    healthy backend endpoints across all zones.
              #    - ZONAL_AFFINITY_STAY_WITHIN_ZONE: Zonal Affinity is
              #    enabled. The load balancer distributes new connections to all healthy
              #    backend endpoints in the local zone only. If there are no healthy
              #    backend endpoints in the local zone, the load balancer distributes
              #    new connections to all backend endpoints in the local zone.
              #    - ZONAL_AFFINITY_SPILL_CROSS_ZONE: Zonal Affinity is
              #    enabled. The load balancer distributes new connections to all healthy
              #    backend endpoints in the local zone only. If there aren't enough
              #    healthy backend endpoints in the local zone, the load balancer
              #    distributes new connections to all healthy backend endpoints across all
              #    zones.
          "spilloverRatio": 3.14, # The value of the field must be in [0, 1]. When the ratio of the count
              # of healthy backend endpoints in a zone to the count of backend
              # endpoints in that same zone is equal to or above this threshold, the
              # load balancer distributes new connections to all healthy endpoints in
              # the local zone only. When the ratio of the count of healthy backend
              # endpoints in a zone to the count of backend endpoints in that same
              # zone is below this threshold, the load balancer distributes all new
              # connections to all healthy endpoints across all zones.
        },
      },
      "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend service.
          # the backend service.
        "resourceUri": "A String", # The resource URI of the resource or system that manages the backend
            # service.
      },
      "outlierDetection": { # Settings controlling the eviction of unhealthy hosts from the load balancing # Settings controlling the ejection of unhealthy backend endpoints from the
          # load balancing pool of each individual proxy instance that processes the
          # traffic for the given backend service. If not set, this feature is
          # considered disabled.
          #
          # Results of the outlier detection algorithm (ejection of endpoints from the
          # load balancing pool and returning them back to the pool) are executed
          # independently by each proxy instance of the load balancer. In most cases,
          # more than one proxy instance handles the traffic received by a backend
          # service. Thus, it is possible that an unhealthy endpoint is detected and
          # ejected by only some of the proxies, and while this happens, other proxies
          # may continue to send requests to the same unhealthy endpoint until they
          # detect and eject the unhealthy endpoint.
          #
          # Applicable backend endpoints can be:
          #
          #    - VM instances in an Instance Group
          #    - Endpoints in a Zonal NEG (GCE_VM_IP, GCE_VM_IP_PORT)
          #    - Endpoints in a Hybrid Connectivity NEG (NON_GCP_PRIVATE_IP_PORT)
          #    - Serverless NEGs, that resolve to Cloud Run, App Engine, or Cloud
          #    Functions Services
          #    - Private Service Connect NEGs, that resolve to
          #    Google-managed regional API endpoints or managed services published using
          #    Private Service Connect
          #
          #
          #
          # Applicable backend service types can be:
          #
          #    - A global backend service with the loadBalancingScheme set to
          #    INTERNAL_SELF_MANAGED or EXTERNAL_MANAGED.
          #    - A regional backend
          #    service with the service protocol set to HTTP, HTTPS, HTTP2 or H2C, and
          #    loadBalancingScheme set to INTERNAL_MANAGED or EXTERNAL_MANAGED. Not
          #    supported for Serverless NEGs.
          #
          #
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
          # pool for the backend service.
        "baseEjectionTime": { # A Duration represents a fixed-length span of time represented # The base time that a backend endpoint is ejected for. Defaults to 30000ms
            # or 30s.
            #
            # After a backend endpoint is returned back to the load balancing pool, it
            # can be ejected again in another ejection analysis. Thus, the total ejection
            # time is equal to the base ejection time multiplied by the number of times
            # the backend endpoint has been ejected. Defaults to 30000ms or 30s.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "consecutiveErrors": 42, # Number of consecutive errors before a backend endpoint is ejected from the
            # load balancing pool. When the backend endpoint is accessed over HTTP, a 5xx
            # return code qualifies as an error. Defaults to 5.
        "consecutiveGatewayFailure": 42, # The number of consecutive gateway failures (502, 503, 504 status or
            # connection errors that are mapped to one of those status codes) before a
            # consecutive gateway failure ejection occurs. Defaults to 3.
        "enforcingConsecutiveErrors": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through consecutive 5xx. This setting can be
            # used to disable ejection or to ramp it up slowly. Defaults to 0.
        "enforcingConsecutiveGatewayFailure": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through consecutive gateway failures. This
            # setting can be used to disable ejection or to ramp it up slowly. Defaults
            # to 100.
        "enforcingSuccessRate": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through success rate statistics. This setting
            # can be used to disable ejection or to ramp it up slowly. Defaults to 100.
            #
            # Not supported when the backend service uses Serverless NEG.
        "interval": { # A Duration represents a fixed-length span of time represented # Time interval between ejection analysis sweeps. This can result in both new
            # ejections and backend endpoints being returned to service. The interval is
            # equal to the number of seconds as defined in
            # outlierDetection.interval.seconds plus the number of nanoseconds as defined
            # in outlierDetection.interval.nanos. Defaults to 1 second.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "maxEjectionPercent": 42, # Maximum percentage of backend endpoints in the load balancing pool for the
            # backend service that can be ejected if the ejection conditions are met.
            # Defaults to 50%.
        "successRateMinimumHosts": 42, # The number of backend endpoints in the load balancing pool that must have
            # enough request volume to detect success rate outliers. If the number of
            # backend endpoints is fewer than this setting, outlier detection via success
            # rate statistics is not performed for any backend endpoint in the load
            # balancing pool. Defaults to 5.
            #
            # Not supported when the backend service uses Serverless NEG.
        "successRateRequestVolume": 42, # The minimum number of total requests that must be collected in one interval
            # (as defined by the interval duration above) to include this backend
            # endpoint in success rate based outlier detection. If the volume is lower
            # than this setting, outlier detection via success rate statistics is not
            # performed for that backend endpoint. Defaults to 100.
            #
            # Not supported when the backend service uses Serverless NEG.
        "successRateStdevFactor": 42, # This factor is used to determine the ejection threshold for success rate
            # outlier ejection. The ejection threshold is the difference between the mean
            # success rate, and the product of this factor and the standard deviation of
            # the mean success rate: mean - (stdev * successRateStdevFactor). This factor
            # is divided by a thousand to get a double. That is, if the desired factor
            # is 1.9, the runtime value should be 1900. Defaults to 1900.
            #
            # Not supported when the backend service uses Serverless NEG.
      },
      "params": { # Additional Backend Service parameters. # Input only. [Input Only] Additional params passed with the request, but not persisted
          # as part of resource payload.
        "resourceManagerTags": { # Tag keys/values directly bound to this resource.
            # Tag keys and values have the same definition as resource
            # manager tags. The field is allowed for INSERT
            # only. The keys/values to set on the resource should be specified in
            # either ID { : } or Namespaced format
            # { : }.
            # For example the following are valid inputs:
            # * {"tagKeys/333" : "tagValues/444", "tagKeys/123" : "tagValues/456"}
            # * {"123/environment" : "production", "345/abc" : "xyz"}
            # Note:
            # * Invalid combinations of ID & namespaced format is not supported. For
            #   instance: {"123/environment" : "tagValues/444"} is invalid.
          "a_key": "A String",
        },
      },
      "port": 42, # Deprecated in favor of portName. The TCP port to connect on
          # the backend. The default value is 80.
          # For internal passthrough Network Load Balancers and external passthrough
          # Network Load Balancers, omit port.
      "portName": "A String", # A named port on a backend instance group representing the port for
          # communication to the backend VMs in that group. The
          # named port must be [defined on each backend instance
          # group](https://cloud.google.com/load-balancing/docs/backend-service#named_ports).
          # This parameter has no meaning if the backends are NEGs. For internal
          # passthrough Network Load Balancers and external passthrough Network Load
          # Balancers, omit port_name.
      "protocol": "A String", # The protocol this BackendService uses to communicate
          # with backends.
          #
          # Possible values are HTTP, HTTPS, HTTP2, H2C, TCP, SSL, UDP or GRPC.
          # depending on the chosen load balancer or Traffic Director configuration.
          # Refer to the documentation for the load balancers or for Traffic Director
          # for more information.
          #
          # Must be set to GRPC when the backend service is referenced by a URL map
          # that is bound to target gRPC proxy.
      "region": "A String", # Output only. [Output Only] URL of the region where the regional backend service
          # resides. This field is not applicable to global backend services.
          # You must specify this field as part of the HTTP request URL. It is
          # not settable as a field in the request body.
      "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this
          # backend service.
      "securitySettings": { # The authentication and authorization settings for a BackendService. # This field specifies the security settings that apply to this backend
          # service. This field is applicable to a global backend service with the
          # load_balancing_scheme set to INTERNAL_SELF_MANAGED.
        "authentication": "A String", # [Deprecated] Use clientTlsPolicy instead.
        "awsV4Authentication": { # Contains the configurations necessary to generate a signature for access to # The configuration needed to generate a signature for access to private
            # storage buckets that support AWS's Signature Version 4 for authentication.
            # Allowed only for INTERNET_IP_PORT and INTERNET_FQDN_PORT NEG backends.
            # private storage buckets that support Signature Version 4 for authentication.
            # The service name for generating the authentication header will always default
            # to 's3'.
          "accessKey": "A String", # The access key used for s3 bucket authentication. Required for updating or
              # creating a backend that uses AWS v4 signature authentication, but will not
              # be returned as part of the configuration when queried with a REST API GET
              # request.
              #
              # @InputOnly
          "accessKeyId": "A String", # The identifier of an access key used for s3 bucket authentication.
          "accessKeyVersion": "A String", # The optional version identifier for the access key. You can use this to
              # keep track of different iterations of your access key.
          "originRegion": "A String", # The name of the cloud region of your origin. This is a free-form field with
              # the name of the region your cloud uses to host your origin.  For example,
              # "us-east-1" for AWS or "us-ashburn-1" for OCI.
        },
        "clientTlsPolicy": "A String", # Optional. A URL referring to a networksecurity.ClientTlsPolicy resource
            # that describes how clients should authenticate with this service's
            # backends.
            #
            #  clientTlsPolicy only applies to a globalBackendService with the loadBalancingScheme set
            # to INTERNAL_SELF_MANAGED.
            #
            #  If left blank, communications are not encrypted.
        "subjectAltNames": [ # Optional. A list of Subject Alternative Names (SANs) that the client
            # verifies during a mutual TLS handshake with an server/endpoint for thisBackendService. When the server presents its X.509 certificate
            # to the client, the client inspects the certificate'ssubjectAltName field. If the field contains one of the
            # specified values, the communication continues. Otherwise, it fails. This
            # additional check enables the client to verify that the server is authorized
            # to run the requested service.
            #
            #  Note that the contents of the server
            # certificate's subjectAltName field are configured by the
            # Public Key Infrastructure which provisions server identities.
            #
            #  Only applies to a global BackendService withloadBalancingScheme set to INTERNAL_SELF_MANAGED.
            # Only applies when BackendService has an attachedclientTlsPolicy with clientCertificate (mTLS
            # mode).
          "A String",
        ],
      },
      "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
      "serviceBindings": [ # URLs of networkservices.ServiceBinding resources.
          #
          # Can only be set if load balancing scheme is INTERNAL_SELF_MANAGED.
          # If set, lists of backends and health checks must be both empty.
        "A String",
      ],
      "serviceLbPolicy": "A String", # URL to networkservices.ServiceLbPolicy resource.
          #
          # Can only be set if load balancing scheme is EXTERNAL_MANAGED,
          # INTERNAL_MANAGED or INTERNAL_SELF_MANAGED and the scope is global.
      "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
          #
          # Only NONE and HEADER_FIELD are supported
          # when the backend service is referenced by a URL map that is bound to
          # target gRPC proxy that has validateForProxyless field set to true.
          #
          # For more details, see:
          # [Session
          # Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity).
          #
          # sessionAffinity cannot be specified with haPolicy.
      "strongSessionAffinityCookie": { # The HTTP cookie used for stateful session affinity. # Describes the HTTP cookie used for stateful session affinity. This field is
          # applicable and required if the sessionAffinity is set toSTRONG_COOKIE_AFFINITY.
        "name": "A String", # Name of the cookie.
        "path": "A String", # Path to set for the cookie.
        "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
      },
      "subsetting": { # Subsetting configuration for this BackendService. # subsetting cannot be specified with haPolicy.
          # Currently this is applicable only for Internal TCP/UDP load balancing,
          # Internal HTTP(S) load balancing and Traffic Director.
        "policy": "A String",
        "subsetSize": 42, # The number of backends per backend group assigned to each proxy instance or
            # each service mesh client.
            #
            # An input parameter to the `CONSISTENT_HASH_SUBSETTING` algorithm.
            # Can only be set if `policy` is set to `CONSISTENT_HASH_SUBSETTING`.
            # Can only be set if load balancing scheme is `INTERNAL_MANAGED` or
            # `INTERNAL_SELF_MANAGED`.
            #
            # `subset_size` is optional for Internal HTTP(S) load balancing
            # and required for Traffic Director.
            #
            # If you do not provide this value, Cloud Load Balancing will calculate it
            # dynamically to optimize the number of proxies/clients visible to each
            # backend and vice versa.
            #
            # Must be greater than 0. If `subset_size` is larger than the number of
            # backends/endpoints, then subsetting is disabled.
      },
      "timeoutSec": 42, # The backend service timeout has a different meaning depending on the
          # type of load balancer. For more information see,
          # Backend service settings.
          # The default is 30 seconds.
          # The full range of timeout values allowed goes from 1
          # through 2,147,483,647 seconds.
          #
          # This value can be overridden in the PathMatcher configuration of the
          # UrlMap that references this backend service.
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
          # Instead, use maxStreamDuration.
      "tlsSettings": { # Configuration for Backend Authenticated TLS and mTLS. May only be specified
          # when the backend protocol is SSL, HTTPS or HTTP2.
        "authenticationConfig": "A String", # Reference to the BackendAuthenticationConfig resource from the
            # networksecurity.googleapis.com namespace. Can be used in authenticating
            # TLS connections to the backend, as specified by the authenticationMode
            # field. Can only be specified if authenticationMode is not NONE.
        "identity": "A String", # Assigns the Managed Identity for the BackendService Workload.
            #
            #
            # Use this property to configure the load balancer back-end to use
            # certificates and roots of trust provisioned by the Managed Workload
            # Identity system.
            #
            #  The `identity` property is the
            # fully-specified SPIFFE ID to use in the SVID presented by the Load
            # Balancer Workload.
            #
            #  The SPIFFE ID must be a resource starting with the
            # `trustDomain` property value, followed by the path to the Managed
            # Workload Identity.
            #
            #  Supported SPIFFE ID format:
            #
            #    - //<trust_domain>/ns/<namespace>/sa/<subject>
            #
            #
            # The Trust Domain within the Managed Identity must refer to a valid
            # Workload Identity Pool. The TrustConfig and CertificateIssuanceConfig
            # will be inherited from the Workload Identity Pool.
            #
            #  Restrictions:
            #
            #    - If you set the `identity` property, you cannot manually set
            #    the following fields:
            #        - tlsSettings.sni
            #       - tlsSettings.subjectAltNames
            #       - tlsSettings.authenticationConfig
            #
            #
            # When defining a `identity` for a RegionBackendServices, the
            # corresponding Workload Identity Pool must have a ca_pool
            # configured in the same region.
            #
            #  The system will set up a read-onlytlsSettings.authenticationConfig for the Managed Identity.
        "sni": "A String", # Server Name Indication - see RFC3546 section 3.1. If set, the load
            # balancer sends this string as the SNI hostname in the TLS connection to
            # the backend, and requires that this string match a Subject Alternative
            # Name (SAN) in the backend's server certificate. With a Regional Internet
            # NEG backend, if the SNI is specified here, the load balancer uses it
            # regardless of whether the Regional Internet NEG is specified with FQDN or
            # IP address and port. When both sni and subjectAltNames[] are specified,
            # the load balancer matches the backend certificate's SAN only to
            # subjectAltNames[].
        "subjectAltNames": [ # A list of Subject Alternative Names (SANs) that the Load Balancer
            # verifies during a TLS handshake with the backend. When the server
            # presents its X.509 certificate to the Load Balancer, the Load Balancer
            # inspects the certificate's SAN field, and requires that at least one SAN
            # match one of the subjectAltNames in the list. This field is limited to 5
            # entries. When both sni and subjectAltNames[] are specified, the load
            # balancer matches the backend certificate's SAN only to subjectAltNames[].
          { # A Subject Alternative Name that the load balancer matches against the SAN
              # field in the TLS certificate provided by the backend, specified as either
              # a DNS name or a URI, in accordance with RFC 5280 4.2.1.6
            "dnsName": "A String", # The SAN specified as a DNS Name.
            "uniformResourceIdentifier": "A String", # The SAN specified as a URI.
          },
        ],
      },
      "usedBy": [ # Output only. [Output Only] List of resources referencing given backend service.
        {
          "reference": "A String", # Output only. [Output Only] Server-defined URL for resources referencing given
              # BackendService like UrlMaps, TargetTcpProxies, TargetSslProxies
              # and ForwardingRule.
        },
      ],
    }

      requestId: string, An optional request ID to identify requests. Specify a unique request ID so
    that if you must retry your request, the server will know to ignore the
    request if it has already been completed.

    For example, consider a situation where you make an initial request and
    the request times out. If you make the request again with the same
    request ID, the server can check if original operation with the same
    request ID was received, and if so, will ignore the second request. This
    prevents clients from accidentally creating duplicate commitments.

    The request ID must be
    a valid UUID with the exception that zero UUID is not supported
    (00000000-0000-0000-0000-000000000000).
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Represents an Operation resource.
        #
        # Google Compute Engine has three Operation resources:
        #
        # * [Global](/compute/docs/reference/rest/beta/globalOperations)
        # * [Regional](/compute/docs/reference/rest/beta/regionOperations)
        # * [Zonal](/compute/docs/reference/rest/beta/zoneOperations)
        #
        # You can use an operation resource to manage asynchronous API requests.
        # For more information, readHandling
        # API responses.
        #
        # Operations can be global, regional or zonal.
        #
        #    - For global operations, use the `globalOperations`
        #    resource.
        #    - For regional operations, use the
        #    `regionOperations` resource.
        #    - For zonal operations, use
        #    the `zoneOperations` resource.
        #
        #
        #
        # For more information, read
        # Global, Regional, and Zonal Resources.
        #
        # Note that completed Operation resources have a limited
        # retention period.
      "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request.
          # Not present otherwise.
      "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
      "description": "A String", # [Output Only] A textual description of the operation, which is
          # set when the operation is created.
      "endTime": "A String", # [Output Only] The time that this operation was completed. This value is inRFC3339
          # text format.
      "error": { # [Output Only] If errors are generated during processing of the operation,
          # this field will be populated.
        "errors": [ # [Output Only] The array of errors encountered while processing this
            # operation.
          {
            "code": "A String", # [Output Only] The error type identifier for this error.
            "errorDetails": [ # [Output Only] An optional list of messages that contain the error
                # details. There is a set of defined message types to use for providing
                # details.The syntax depends on the error code. For example,
                # QuotaExceededInfo will have details when the error code is
                # QUOTA_EXCEEDED.
              {
                "errorInfo": { # Describes the cause of the error with structured details.
                    #
                    # Example of an error when contacting the "pubsub.googleapis.com" API when it
                    # is not enabled:
                    #
                    #     { "reason": "API_DISABLED"
                    #       "domain": "googleapis.com"
                    #       "metadata": {
                    #         "resource": "projects/123",
                    #         "service": "pubsub.googleapis.com"
                    #       }
                    #     }
                    #
                    # This response indicates that the pubsub.googleapis.com API is not enabled.
                    #
                    # Example of an error that is returned when attempting to create a Spanner
                    # instance in a region that is out of stock:
                    #
                    #     { "reason": "STOCKOUT"
                    #       "domain": "spanner.googleapis.com",
                    #       "metadata": {
                    #         "availableRegions": "us-central1,us-east2"
                    #       }
                    #     }
                  "domain": "A String", # The logical grouping to which the "reason" belongs. The error domain
                      # is typically the registered service name of the tool or product that
                      # generates the error. Example: "pubsub.googleapis.com". If the error is
                      # generated by some common infrastructure, the error domain must be a
                      # globally unique value that identifies the infrastructure. For Google API
                      # infrastructure, the error domain is "googleapis.com".
                  "metadatas": { # Additional structured details about this error.
                      #
                      # Keys must match a regular expression of `a-z+` but should
                      # ideally be lowerCamelCase. Also, they must be limited to 64 characters in
                      # length. When identifying the current value of an exceeded limit, the units
                      # should be contained in the key, not the value.  For example, rather than
                      # `{"instanceLimit": "100/request"}`, should be returned as,
                      # `{"instanceLimitPerRequest": "100"}`, if the client exceeds the number of
                      # instances that can be created in a single (batch) request.
                    "a_key": "A String",
                  },
                  "reason": "A String", # The reason of the error. This is a constant value that identifies the
                      # proximate cause of the error. Error reasons are unique within a particular
                      # domain of errors. This should be at most 63 characters and match a
                      # regular expression of `A-Z+[A-Z0-9]`, which represents
                      # UPPER_SNAKE_CASE.
                },
                "help": { # Provides links to documentation or for performing an out of band action.
                    #
                    # For example, if a quota check failed with an error indicating the calling
                    # project hasn't enabled the accessed service, this can contain a URL pointing
                    # directly to the right place in the developer console to flip the bit.
                  "links": [ # URL(s) pointing to additional information on handling the current error.
                    { # Describes a URL link.
                      "description": "A String", # Describes what the link offers.
                      "url": "A String", # The URL of the link.
                    },
                  ],
                },
                "localizedMessage": { # Provides a localized error message that is safe to return to the user
                    # which can be attached to an RPC error.
                  "locale": "A String", # The locale used following the specification defined at
                      # https://www.rfc-editor.org/rfc/bcp/bcp47.txt.
                      # Examples are: "en-US", "fr-CH", "es-MX"
                  "message": "A String", # The localized error message in the above locale.
                },
                "quotaInfo": { # Additional details for quota exceeded error for resource quota.
                  "dimensions": { # The map holding related quota dimensions.
                    "a_key": "A String",
                  },
                  "futureLimit": 3.14, # Future quota limit being rolled out. The limit's unit depends on the quota
                      #  type or metric.
                  "limit": 3.14, # Current effective quota limit. The limit's unit depends on the quota type
                      # or metric.
                  "limitName": "A String", # The name of the quota limit.
                  "metricName": "A String", # The Compute Engine quota metric name.
                  "rolloutStatus": "A String", # Rollout status of the future quota limit.
                },
              },
            ],
            "location": "A String", # [Output Only] Indicates the field in the request that caused the error.
                # This property is optional.
            "message": "A String", # [Output Only] An optional, human-readable error message.
          },
        ],
      },
      "getVersionOperationMetadata": {
        "inlineSbomInfo": {
          "currentComponentVersions": { # SBOM versions currently applied to the resource. The key is the component
              # name and the value is the version.
            "a_key": "A String",
          },
          "targetComponentVersions": { # SBOM versions scheduled for the next maintenance. The key is the
              # component name and the value is the version.
            "a_key": "A String",
          },
        },
      },
      "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error
          # message that was returned, such as `NOT FOUND`.
      "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error
          # status code that was returned. For example, a `404` means the
          # resource was not found.
      "id": "A String", # [Output Only] The unique identifier for the operation. This identifier is
          # defined by the server.
      "insertTime": "A String", # [Output Only] The time that this operation was requested.
          # This value is inRFC3339
          # text format.
      "instancesBulkInsertOperationMetadata": {
        "perLocationStatus": { # Status information per location (location name is key).
            # Example key: zones/us-central1-a
          "a_key": {
            "createdVmCount": 42, # [Output Only] Count of VMs successfully created so far.
            "deletedVmCount": 42, # [Output Only] Count of VMs that got deleted during rollback.
            "failedToCreateVmCount": 42, # [Output Only] Count of VMs that started creating but encountered an
                # error.
            "status": "A String", # [Output Only] Creation status of BulkInsert operation - information
                # if the flow is rolling forward or rolling back.
            "targetVmCount": 42, # [Output Only] Count of VMs originally planned to be created.
          },
        },
      },
      "kind": "compute#operation", # Output only. [Output Only] Type of the resource. Always `compute#operation` for
          # Operation resources.
      "name": "A String", # [Output Only] Name of the operation.
      "operationGroupId": "A String", # Output only. [Output Only] An ID that represents a group of operations, such as when a
          # group of operations results from a `bulkInsert` API request.
      "operationType": "A String", # [Output Only] The type of operation, such as `insert`,
          # `update`, or `delete`, and so on.
      "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100.
          # There is no requirement that this be linear or support any granularity of
          # operations. This should not be used to guess when the operation will be
          # complete. This number should monotonically increase as the operation
          # progresses.
      "region": "A String", # [Output Only] The URL of the region where the operation resides. Only
          # applicable when performing regional operations.
      "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
      "setCommonInstanceMetadataOperationMetadata": { # Output only. [Output Only] If the operation is for projects.setCommonInstanceMetadata,
          # this field will contain information on all underlying zonal actions and
          # their state.
        "clientOperationId": "A String", # [Output Only] The client operation id.
        "perLocationOperations": { # [Output Only] Status information per location (location name is key).
            # Example key: zones/us-central1-a
          "a_key": {
            "error": { # The `Status` type defines a logical error model that is suitable for # [Output Only] If state is `ABANDONED` or `FAILED`, this field is
                # populated.
                # different programming environments, including REST APIs and RPC APIs. It is
                # used by [gRPC](https://github.com/grpc). Each `Status` message contains
                # three pieces of data: error code, error message, and error details.
                #
                # You can find out more about this error model and how to work with it in the
                # [API Design Guide](https://cloud.google.com/apis/design/errors).
              "code": 42, # The status code, which should be an enum value of google.rpc.Code.
              "details": [ # A list of messages that carry the error details.  There is a common set of
                  # message types for APIs to use.
                {
                  "a_key": "", # Properties of the object. Contains field @type with type URL.
                },
              ],
              "message": "A String", # A developer-facing error message, which should be in English. Any
                  # user-facing error message should be localized and sent in the
                  # google.rpc.Status.details field, or localized by the client.
            },
            "state": "A String", # [Output Only] Status of the action, which can be one of the following:
                # `PROPAGATING`, `PROPAGATED`, `ABANDONED`, `FAILED`, or `DONE`.
          },
        },
      },
      "startTime": "A String", # [Output Only] The time that this operation was started by the server.
          # This value is inRFC3339
          # text format.
      "status": "A String", # [Output Only] The status of the operation, which can be one of the
          # following:
          # `PENDING`, `RUNNING`, or `DONE`.
      "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the
          # operation.
      "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation
          # of the target resource.
      "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies. For
          # operations related to creating a snapshot, this points to the disk
          # that the snapshot was created from.
      "user": "A String", # [Output Only] User who requested the operation, for example:
          # `user@example.com` or
          # `alice_smith_identifier (global/workforcePools/example-com-us-employees)`.
      "warnings": [ # [Output Only] If warning messages are generated during processing of the
          # operation, this field will be populated.
        {
          "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute
              # Engine returns NO_RESULTS_ON_PAGE if there
              # are no results in the response.
          "data": [ # [Output Only] Metadata about this warning in key:
              # value format. For example:
              #
              # "data": [
              #   {
              #    "key": "scope",
              #    "value": "zones/us-east1-d"
              #   }
            {
              "key": "A String", # [Output Only] A key that provides more detail on the warning being
                  # returned. For example, for warnings where there are no results in a list
                  # request for a particular zone, this key might be scope and
                  # the key value might be the zone name. Other examples might be a key
                  # indicating a deprecated resource and a suggested replacement, or a
                  # warning about invalid network settings (for example, if an instance
                  # attempts to perform IP forwarding but is not enabled for IP forwarding).
              "value": "A String", # [Output Only] A warning data value corresponding to the key.
            },
          ],
          "message": "A String", # [Output Only] A human-readable description of the warning code.
        },
      ],
      "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only
          # applicable when performing per-zone operations.
    }

`setIamPolicy(project, region, resource, body=None, x__xgafv=None)`

    Sets the access control policy on the specified resource.
    Replaces any existing policy.

    Args:
      project: string, Project ID for this request. (required)
      region: string, The name of the region for this request. (required)
      resource: string, Name or id of the resource for this request. (required)
      body: object, The request body.
        The object takes the form of:

    {
      "bindings": [ # Flatten Policy to create a backwacd compatible wire-format.
          # Deprecated. Use 'policy' to specify bindings.
        { # Associates `members`, or principals, with a `role`.
          "condition": { # Represents a textual expression in the Common Expression Language (CEL) # The condition that is associated with this binding.
              #
              # If the condition evaluates to `true`, then this binding applies to the
              # current request.
              #
              # If the condition evaluates to `false`, then this binding does not apply to
              # the current request. However, a different role binding might grant the same
              # role to one or more of the principals in this binding.
              #
              # To learn which resources support conditions in their IAM policies, see the
              # [IAM
              # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
              # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
              # are documented at https://github.com/google/cel-spec.
              #
              # Example (Comparison):
              #
              #     title: "Summary size limit"
              #     description: "Determines if a summary is less than 100 chars"
              #     expression: "document.summary.size() < 100"
              #
              # Example (Equality):
              #
              #     title: "Requestor is owner"
              #     description: "Determines if requestor is the document owner"
              #     expression: "document.owner == request.auth.claims.email"
              #
              # Example (Logic):
              #
              #     title: "Public documents"
              #     description: "Determine whether the document should be publicly visible"
              #     expression: "document.type != 'private' && document.type != 'internal'"
              #
              # Example (Data Manipulation):
              #
              #     title: "Notification string"
              #     description: "Create a notification string with a timestamp."
              #     expression: "'New message received at ' + string(document.create_time)"
              #
              # The exact variables and functions that may be referenced within an expression
              # are determined by the service that evaluates it. See the service
              # documentation for additional information.
            "description": "A String", # Optional. Description of the expression. This is a longer text which
                # describes the expression, e.g. when hovered over it in a UI.
            "expression": "A String", # Textual representation of an expression in Common Expression Language
                # syntax.
            "location": "A String", # Optional. String indicating the location of the expression for error
                # reporting, e.g. a file name and a position in the file.
            "title": "A String", # Optional. Title for the expression, i.e. a short string describing
                # its purpose. This can be used e.g. in UIs which allow to enter the
                # expression.
          },
          "members": [ # Specifies the principals requesting access for a Google Cloud resource.
              # `members` can have the following values:
              #
              # * `allUsers`: A special identifier that represents anyone who is
              #    on the internet; with or without a Google account.
              #
              # * `allAuthenticatedUsers`: A special identifier that represents anyone
              #    who is authenticated with a Google account or a service account.
              #    Does not include identities that come from external identity providers
              #    (IdPs) through identity federation.
              #
              # * `user:{emailid}`: An email address that represents a specific Google
              #    account. For example, `alice@example.com` .
              #
              #
              # * `serviceAccount:{emailid}`: An email address that represents a Google
              #    service account. For example,
              #    `my-other-app@appspot.gserviceaccount.com`.
              #
              # * `serviceAccount:{projectid}.svc.id.goog[{namespace}/{kubernetes-sa}]`: An
              #    identifier for a
              #    [Kubernetes service
              #    account](https://cloud.google.com/kubernetes-engine/docs/how-to/kubernetes-service-accounts).
              #    For example, `my-project.svc.id.goog[my-namespace/my-kubernetes-sa]`.
              #
              # * `group:{emailid}`: An email address that represents a Google group.
              #    For example, `admins@example.com`.
              #
              #
              # * `domain:{domain}`: The G Suite domain (primary) that represents all the
              #    users of that domain. For example, `google.com` or `example.com`.
              #
              #
              #
              #
              # * `principal://iam.googleapis.com/locations/global/workforcePools/{pool_id}/subject/{subject_attribute_value}`:
              #   A single identity in a workforce identity pool.
              #
              # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/group/{group_id}`:
              #   All workforce identities in a group.
              #
              # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/attribute.{attribute_name}/{attribute_value}`:
              #   All workforce identities with a specific attribute value.
              #
              # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/*`:
              #   All identities in a workforce identity pool.
              #
              # * `principal://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/subject/{subject_attribute_value}`:
              #   A single identity in a workload identity pool.
              #
              # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/group/{group_id}`:
              #   A workload identity pool group.
              #
              # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/attribute.{attribute_name}/{attribute_value}`:
              #   All identities in a workload identity pool with a certain attribute.
              #
              # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/*`:
              #   All identities in a workload identity pool.
              #
              # * `deleted:user:{emailid}?uid={uniqueid}`: An email address (plus unique
              #    identifier) representing a user that has been recently deleted. For
              #    example, `alice@example.com?uid=123456789012345678901`. If the user is
              #    recovered, this value reverts to `user:{emailid}` and the recovered user
              #    retains the role in the binding.
              #
              # * `deleted:serviceAccount:{emailid}?uid={uniqueid}`: An email address (plus
              #    unique identifier) representing a service account that has been recently
              #    deleted. For example,
              #    `my-other-app@appspot.gserviceaccount.com?uid=123456789012345678901`.
              #    If the service account is undeleted, this value reverts to
              #    `serviceAccount:{emailid}` and the undeleted service account retains the
              #    role in the binding.
              #
              # * `deleted:group:{emailid}?uid={uniqueid}`: An email address (plus unique
              #    identifier) representing a Google group that has been recently
              #    deleted. For example, `admins@example.com?uid=123456789012345678901`. If
              #    the group is recovered, this value reverts to `group:{emailid}` and the
              #    recovered group retains the role in the binding.
              #
              # * `deleted:principal://iam.googleapis.com/locations/global/workforcePools/{pool_id}/subject/{subject_attribute_value}`:
              #   Deleted single identity in a workforce identity pool. For example,
              #   `deleted:principal://iam.googleapis.com/locations/global/workforcePools/my-pool-id/subject/my-subject-attribute-value`.
            "A String",
          ],
          "role": "A String", # Role that is assigned to the list of `members`, or principals.
              # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
              #
              # For an overview of the IAM roles and permissions, see the
              # [IAM documentation](https://cloud.google.com/iam/docs/roles-overview). For
              # a list of the available pre-defined roles, see
              # [here](https://cloud.google.com/iam/docs/understanding-roles).
        },
      ],
      "etag": "A String", # Flatten Policy to create a backward compatible wire-format.
          # Deprecated. Use 'policy' to specify the etag.
      "policy": { # An Identity and Access Management (IAM) policy, which specifies access # REQUIRED: The complete policy to be applied to the 'resource'. The size of
          # the policy is limited to a few 10s of KB. An empty policy is in general a
          # valid policy but certain services (like Projects) might reject them.
          # controls for Google Cloud resources.
          #
          #
          # A `Policy` is a collection of `bindings`. A `binding` binds one or more
          # `members`, or principals, to a single `role`. Principals can be user
          # accounts, service accounts, Google groups, and domains (such as G Suite). A
          # `role` is a named list of permissions; each `role` can be an IAM predefined
          # role or a user-created custom role.
          #
          # For some types of Google Cloud resources, a `binding` can also specify a
          # `condition`, which is a logical expression that allows access to a resource
          # only if the expression evaluates to `true`. A condition can add constraints
          # based on attributes of the request, the resource, or both. To learn which
          # resources support conditions in their IAM policies, see the
          # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
          #
          # **JSON example:**
          #
          # ```
          #     {
          #       "bindings": [
          #         {
          #           "role": "roles/resourcemanager.organizationAdmin",
          #           "members": [
          #             "user:mike@example.com",
          #             "group:admins@example.com",
          #             "domain:google.com",
          #             "serviceAccount:my-project-id@appspot.gserviceaccount.com"
          #           ]
          #         },
          #         {
          #           "role": "roles/resourcemanager.organizationViewer",
          #           "members": [
          #             "user:eve@example.com"
          #           ],
          #           "condition": {
          #             "title": "expirable access",
          #             "description": "Does not grant access after Sep 2020",
          #             "expression": "request.time < timestamp('2020-10-01T00:00:00.000Z')",
          #           }
          #         }
          #       ],
          #       "etag": "BwWWja0YfJA=",
          #       "version": 3
          #     }
          # ```
          #
          # **YAML example:**
          #
          # ```
          #     bindings:
          #     - members:
          #       - user:mike@example.com
          #       - group:admins@example.com
          #       - domain:google.com
          #       - serviceAccount:my-project-id@appspot.gserviceaccount.com
          #       role: roles/resourcemanager.organizationAdmin
          #     - members:
          #       - user:eve@example.com
          #       role: roles/resourcemanager.organizationViewer
          #       condition:
          #         title: expirable access
          #         description: Does not grant access after Sep 2020
          #         expression: request.time < timestamp('2020-10-01T00:00:00.000Z')
          #     etag: BwWWja0YfJA=
          #     version: 3
          # ```
          #
          # For a description of IAM and its features, see the
          # [IAM documentation](https://cloud.google.com/iam/docs/).
        "auditConfigs": [ # Specifies cloud audit logging configuration for this policy.
          { # Specifies the audit configuration for a service.
              # The configuration determines which permission types are logged, and what
              # identities, if any, are exempted from logging.
              # An AuditConfig must have one or more AuditLogConfigs.
              #
              # If there are AuditConfigs for both `allServices` and a specific service,
              # the union of the two AuditConfigs is used for that service: the log_types
              # specified in each AuditConfig are enabled, and the exempted_members in each
              # AuditLogConfig are exempted.
              #
              # Example Policy with multiple AuditConfigs:
              #
              #     {
              #       "audit_configs": [
              #         {
              #           "service": "allServices",
              #           "audit_log_configs": [
              #             {
              #               "log_type": "DATA_READ",
              #               "exempted_members": [
              #                 "user:jose@example.com"
              #               ]
              #             },
              #             {
              #               "log_type": "DATA_WRITE"
              #             },
              #             {
              #               "log_type": "ADMIN_READ"
              #             }
              #           ]
              #         },
              #         {
              #           "service": "sampleservice.googleapis.com",
              #           "audit_log_configs": [
              #             {
              #               "log_type": "DATA_READ"
              #             },
              #             {
              #               "log_type": "DATA_WRITE",
              #               "exempted_members": [
              #                 "user:aliya@example.com"
              #               ]
              #             }
              #           ]
              #         }
              #       ]
              #     }
              #
              # For sampleservice, this policy enables DATA_READ, DATA_WRITE and ADMIN_READ
              # logging. It also exempts `jose@example.com` from DATA_READ logging, and
              # `aliya@example.com` from DATA_WRITE logging.
            "auditLogConfigs": [ # The configuration for logging of each type of permission.
              { # Provides the configuration for logging a type of permissions.
                  # Example:
                  #
                  #     {
                  #       "audit_log_configs": [
                  #         {
                  #           "log_type": "DATA_READ",
                  #           "exempted_members": [
                  #             "user:jose@example.com"
                  #           ]
                  #         },
                  #         {
                  #           "log_type": "DATA_WRITE"
                  #         }
                  #       ]
                  #     }
                  #
                  # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting
                  # jose@example.com from DATA_READ logging.
                "exemptedMembers": [ # Specifies the identities that do not cause logging for this type of
                    # permission.
                    # Follows the same format of Binding.members.
                  "A String",
                ],
                "logType": "A String", # The log type that this config enables.
              },
            ],
            "service": "A String", # Specifies a service that will be enabled for audit logging.
                # For example, `storage.googleapis.com`, `cloudsql.googleapis.com`.
                # `allServices` is a special value that covers all services.
          },
        ],
        "bindings": [ # Associates a list of `members`, or principals, with a `role`. Optionally,
            # may specify a `condition` that determines how and when the `bindings` are
            # applied. Each of the `bindings` must contain at least one principal.
            #
            # The `bindings` in a `Policy` can refer to up to 1,500 principals; up to 250
            # of these principals can be Google groups. Each occurrence of a principal
            # counts towards these limits. For example, if the `bindings` grant 50
            # different roles to `user:alice@example.com`, and not to any other
            # principal, then you can add another 1,450 principals to the `bindings` in
            # the `Policy`.
          { # Associates `members`, or principals, with a `role`.
            "condition": { # Represents a textual expression in the Common Expression Language (CEL) # The condition that is associated with this binding.
                #
                # If the condition evaluates to `true`, then this binding applies to the
                # current request.
                #
                # If the condition evaluates to `false`, then this binding does not apply to
                # the current request. However, a different role binding might grant the same
                # role to one or more of the principals in this binding.
                #
                # To learn which resources support conditions in their IAM policies, see the
                # [IAM
                # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
                # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
                # are documented at https://github.com/google/cel-spec.
                #
                # Example (Comparison):
                #
                #     title: "Summary size limit"
                #     description: "Determines if a summary is less than 100 chars"
                #     expression: "document.summary.size() < 100"
                #
                # Example (Equality):
                #
                #     title: "Requestor is owner"
                #     description: "Determines if requestor is the document owner"
                #     expression: "document.owner == request.auth.claims.email"
                #
                # Example (Logic):
                #
                #     title: "Public documents"
                #     description: "Determine whether the document should be publicly visible"
                #     expression: "document.type != 'private' && document.type != 'internal'"
                #
                # Example (Data Manipulation):
                #
                #     title: "Notification string"
                #     description: "Create a notification string with a timestamp."
                #     expression: "'New message received at ' + string(document.create_time)"
                #
                # The exact variables and functions that may be referenced within an expression
                # are determined by the service that evaluates it. See the service
                # documentation for additional information.
              "description": "A String", # Optional. Description of the expression. This is a longer text which
                  # describes the expression, e.g. when hovered over it in a UI.
              "expression": "A String", # Textual representation of an expression in Common Expression Language
                  # syntax.
              "location": "A String", # Optional. String indicating the location of the expression for error
                  # reporting, e.g. a file name and a position in the file.
              "title": "A String", # Optional. Title for the expression, i.e. a short string describing
                  # its purpose. This can be used e.g. in UIs which allow to enter the
                  # expression.
            },
            "members": [ # Specifies the principals requesting access for a Google Cloud resource.
                # `members` can have the following values:
                #
                # * `allUsers`: A special identifier that represents anyone who is
                #    on the internet; with or without a Google account.
                #
                # * `allAuthenticatedUsers`: A special identifier that represents anyone
                #    who is authenticated with a Google account or a service account.
                #    Does not include identities that come from external identity providers
                #    (IdPs) through identity federation.
                #
                # * `user:{emailid}`: An email address that represents a specific Google
                #    account. For example, `alice@example.com` .
                #
                #
                # * `serviceAccount:{emailid}`: An email address that represents a Google
                #    service account. For example,
                #    `my-other-app@appspot.gserviceaccount.com`.
                #
                # * `serviceAccount:{projectid}.svc.id.goog[{namespace}/{kubernetes-sa}]`: An
                #    identifier for a
                #    [Kubernetes service
                #    account](https://cloud.google.com/kubernetes-engine/docs/how-to/kubernetes-service-accounts).
                #    For example, `my-project.svc.id.goog[my-namespace/my-kubernetes-sa]`.
                #
                # * `group:{emailid}`: An email address that represents a Google group.
                #    For example, `admins@example.com`.
                #
                #
                # * `domain:{domain}`: The G Suite domain (primary) that represents all the
                #    users of that domain. For example, `google.com` or `example.com`.
                #
                #
                #
                #
                # * `principal://iam.googleapis.com/locations/global/workforcePools/{pool_id}/subject/{subject_attribute_value}`:
                #   A single identity in a workforce identity pool.
                #
                # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/group/{group_id}`:
                #   All workforce identities in a group.
                #
                # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/attribute.{attribute_name}/{attribute_value}`:
                #   All workforce identities with a specific attribute value.
                #
                # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/*`:
                #   All identities in a workforce identity pool.
                #
                # * `principal://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/subject/{subject_attribute_value}`:
                #   A single identity in a workload identity pool.
                #
                # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/group/{group_id}`:
                #   A workload identity pool group.
                #
                # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/attribute.{attribute_name}/{attribute_value}`:
                #   All identities in a workload identity pool with a certain attribute.
                #
                # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/*`:
                #   All identities in a workload identity pool.
                #
                # * `deleted:user:{emailid}?uid={uniqueid}`: An email address (plus unique
                #    identifier) representing a user that has been recently deleted. For
                #    example, `alice@example.com?uid=123456789012345678901`. If the user is
                #    recovered, this value reverts to `user:{emailid}` and the recovered user
                #    retains the role in the binding.
                #
                # * `deleted:serviceAccount:{emailid}?uid={uniqueid}`: An email address (plus
                #    unique identifier) representing a service account that has been recently
                #    deleted. For example,
                #    `my-other-app@appspot.gserviceaccount.com?uid=123456789012345678901`.
                #    If the service account is undeleted, this value reverts to
                #    `serviceAccount:{emailid}` and the undeleted service account retains the
                #    role in the binding.
                #
                # * `deleted:group:{emailid}?uid={uniqueid}`: An email address (plus unique
                #    identifier) representing a Google group that has been recently
                #    deleted. For example, `admins@example.com?uid=123456789012345678901`. If
                #    the group is recovered, this value reverts to `group:{emailid}` and the
                #    recovered group retains the role in the binding.
                #
                # * `deleted:principal://iam.googleapis.com/locations/global/workforcePools/{pool_id}/subject/{subject_attribute_value}`:
                #   Deleted single identity in a workforce identity pool. For example,
                #   `deleted:principal://iam.googleapis.com/locations/global/workforcePools/my-pool-id/subject/my-subject-attribute-value`.
              "A String",
            ],
            "role": "A String", # Role that is assigned to the list of `members`, or principals.
                # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
                #
                # For an overview of the IAM roles and permissions, see the
                # [IAM documentation](https://cloud.google.com/iam/docs/roles-overview). For
                # a list of the available pre-defined roles, see
                # [here](https://cloud.google.com/iam/docs/understanding-roles).
          },
        ],
        "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
            # prevent simultaneous updates of a policy from overwriting each other.
            # It is strongly suggested that systems make use of the `etag` in the
            # read-modify-write cycle to perform policy updates in order to avoid race
            # conditions: An `etag` is returned in the response to `getIamPolicy`, and
            # systems are expected to put that etag in the request to `setIamPolicy` to
            # ensure that their change will be applied to the same version of the policy.
            #
            # **Important:** If you use IAM Conditions, you must include the `etag` field
            # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
            # you to overwrite a version `3` policy with a version `1` policy, and all of
            # the conditions in the version `3` policy are lost.
        "version": 42, # Specifies the format of the policy.
            #
            # Valid values are `0`, `1`, and `3`. Requests that specify an invalid value
            # are rejected.
            #
            # Any operation that affects conditional role bindings must specify version
            # `3`. This requirement applies to the following operations:
            #
            # * Getting a policy that includes a conditional role binding
            # * Adding a conditional role binding to a policy
            # * Changing a conditional role binding in a policy
            # * Removing any role binding, with or without a condition, from a policy
            #   that includes conditions
            #
            # **Important:** If you use IAM Conditions, you must include the `etag` field
            # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
            # you to overwrite a version `3` policy with a version `1` policy, and all of
            # the conditions in the version `3` policy are lost.
            #
            # If a policy does not include any conditions, operations on that policy may
            # specify any valid version or leave the field unset.
            #
            # To learn which resources support conditions in their IAM policies, see the
            # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
      },
    }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # An Identity and Access Management (IAM) policy, which specifies access
        # controls for Google Cloud resources.
        #
        #
        # A `Policy` is a collection of `bindings`. A `binding` binds one or more
        # `members`, or principals, to a single `role`. Principals can be user
        # accounts, service accounts, Google groups, and domains (such as G Suite). A
        # `role` is a named list of permissions; each `role` can be an IAM predefined
        # role or a user-created custom role.
        #
        # For some types of Google Cloud resources, a `binding` can also specify a
        # `condition`, which is a logical expression that allows access to a resource
        # only if the expression evaluates to `true`. A condition can add constraints
        # based on attributes of the request, the resource, or both. To learn which
        # resources support conditions in their IAM policies, see the
        # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
        #
        # **JSON example:**
        #
        # ```
        #     {
        #       "bindings": [
        #         {
        #           "role": "roles/resourcemanager.organizationAdmin",
        #           "members": [
        #             "user:mike@example.com",
        #             "group:admins@example.com",
        #             "domain:google.com",
        #             "serviceAccount:my-project-id@appspot.gserviceaccount.com"
        #           ]
        #         },
        #         {
        #           "role": "roles/resourcemanager.organizationViewer",
        #           "members": [
        #             "user:eve@example.com"
        #           ],
        #           "condition": {
        #             "title": "expirable access",
        #             "description": "Does not grant access after Sep 2020",
        #             "expression": "request.time < timestamp('2020-10-01T00:00:00.000Z')",
        #           }
        #         }
        #       ],
        #       "etag": "BwWWja0YfJA=",
        #       "version": 3
        #     }
        # ```
        #
        # **YAML example:**
        #
        # ```
        #     bindings:
        #     - members:
        #       - user:mike@example.com
        #       - group:admins@example.com
        #       - domain:google.com
        #       - serviceAccount:my-project-id@appspot.gserviceaccount.com
        #       role: roles/resourcemanager.organizationAdmin
        #     - members:
        #       - user:eve@example.com
        #       role: roles/resourcemanager.organizationViewer
        #       condition:
        #         title: expirable access
        #         description: Does not grant access after Sep 2020
        #         expression: request.time < timestamp('2020-10-01T00:00:00.000Z')
        #     etag: BwWWja0YfJA=
        #     version: 3
        # ```
        #
        # For a description of IAM and its features, see the
        # [IAM documentation](https://cloud.google.com/iam/docs/).
      "auditConfigs": [ # Specifies cloud audit logging configuration for this policy.
        { # Specifies the audit configuration for a service.
            # The configuration determines which permission types are logged, and what
            # identities, if any, are exempted from logging.
            # An AuditConfig must have one or more AuditLogConfigs.
            #
            # If there are AuditConfigs for both `allServices` and a specific service,
            # the union of the two AuditConfigs is used for that service: the log_types
            # specified in each AuditConfig are enabled, and the exempted_members in each
            # AuditLogConfig are exempted.
            #
            # Example Policy with multiple AuditConfigs:
            #
            #     {
            #       "audit_configs": [
            #         {
            #           "service": "allServices",
            #           "audit_log_configs": [
            #             {
            #               "log_type": "DATA_READ",
            #               "exempted_members": [
            #                 "user:jose@example.com"
            #               ]
            #             },
            #             {
            #               "log_type": "DATA_WRITE"
            #             },
            #             {
            #               "log_type": "ADMIN_READ"
            #             }
            #           ]
            #         },
            #         {
            #           "service": "sampleservice.googleapis.com",
            #           "audit_log_configs": [
            #             {
            #               "log_type": "DATA_READ"
            #             },
            #             {
            #               "log_type": "DATA_WRITE",
            #               "exempted_members": [
            #                 "user:aliya@example.com"
            #               ]
            #             }
            #           ]
            #         }
            #       ]
            #     }
            #
            # For sampleservice, this policy enables DATA_READ, DATA_WRITE and ADMIN_READ
            # logging. It also exempts `jose@example.com` from DATA_READ logging, and
            # `aliya@example.com` from DATA_WRITE logging.
          "auditLogConfigs": [ # The configuration for logging of each type of permission.
            { # Provides the configuration for logging a type of permissions.
                # Example:
                #
                #     {
                #       "audit_log_configs": [
                #         {
                #           "log_type": "DATA_READ",
                #           "exempted_members": [
                #             "user:jose@example.com"
                #           ]
                #         },
                #         {
                #           "log_type": "DATA_WRITE"
                #         }
                #       ]
                #     }
                #
                # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting
                # jose@example.com from DATA_READ logging.
              "exemptedMembers": [ # Specifies the identities that do not cause logging for this type of
                  # permission.
                  # Follows the same format of Binding.members.
                "A String",
              ],
              "logType": "A String", # The log type that this config enables.
            },
          ],
          "service": "A String", # Specifies a service that will be enabled for audit logging.
              # For example, `storage.googleapis.com`, `cloudsql.googleapis.com`.
              # `allServices` is a special value that covers all services.
        },
      ],
      "bindings": [ # Associates a list of `members`, or principals, with a `role`. Optionally,
          # may specify a `condition` that determines how and when the `bindings` are
          # applied. Each of the `bindings` must contain at least one principal.
          #
          # The `bindings` in a `Policy` can refer to up to 1,500 principals; up to 250
          # of these principals can be Google groups. Each occurrence of a principal
          # counts towards these limits. For example, if the `bindings` grant 50
          # different roles to `user:alice@example.com`, and not to any other
          # principal, then you can add another 1,450 principals to the `bindings` in
          # the `Policy`.
        { # Associates `members`, or principals, with a `role`.
          "condition": { # Represents a textual expression in the Common Expression Language (CEL) # The condition that is associated with this binding.
              #
              # If the condition evaluates to `true`, then this binding applies to the
              # current request.
              #
              # If the condition evaluates to `false`, then this binding does not apply to
              # the current request. However, a different role binding might grant the same
              # role to one or more of the principals in this binding.
              #
              # To learn which resources support conditions in their IAM policies, see the
              # [IAM
              # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
              # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
              # are documented at https://github.com/google/cel-spec.
              #
              # Example (Comparison):
              #
              #     title: "Summary size limit"
              #     description: "Determines if a summary is less than 100 chars"
              #     expression: "document.summary.size() < 100"
              #
              # Example (Equality):
              #
              #     title: "Requestor is owner"
              #     description: "Determines if requestor is the document owner"
              #     expression: "document.owner == request.auth.claims.email"
              #
              # Example (Logic):
              #
              #     title: "Public documents"
              #     description: "Determine whether the document should be publicly visible"
              #     expression: "document.type != 'private' && document.type != 'internal'"
              #
              # Example (Data Manipulation):
              #
              #     title: "Notification string"
              #     description: "Create a notification string with a timestamp."
              #     expression: "'New message received at ' + string(document.create_time)"
              #
              # The exact variables and functions that may be referenced within an expression
              # are determined by the service that evaluates it. See the service
              # documentation for additional information.
            "description": "A String", # Optional. Description of the expression. This is a longer text which
                # describes the expression, e.g. when hovered over it in a UI.
            "expression": "A String", # Textual representation of an expression in Common Expression Language
                # syntax.
            "location": "A String", # Optional. String indicating the location of the expression for error
                # reporting, e.g. a file name and a position in the file.
            "title": "A String", # Optional. Title for the expression, i.e. a short string describing
                # its purpose. This can be used e.g. in UIs which allow to enter the
                # expression.
          },
          "members": [ # Specifies the principals requesting access for a Google Cloud resource.
              # `members` can have the following values:
              #
              # * `allUsers`: A special identifier that represents anyone who is
              #    on the internet; with or without a Google account.
              #
              # * `allAuthenticatedUsers`: A special identifier that represents anyone
              #    who is authenticated with a Google account or a service account.
              #    Does not include identities that come from external identity providers
              #    (IdPs) through identity federation.
              #
              # * `user:{emailid}`: An email address that represents a specific Google
              #    account. For example, `alice@example.com` .
              #
              #
              # * `serviceAccount:{emailid}`: An email address that represents a Google
              #    service account. For example,
              #    `my-other-app@appspot.gserviceaccount.com`.
              #
              # * `serviceAccount:{projectid}.svc.id.goog[{namespace}/{kubernetes-sa}]`: An
              #    identifier for a
              #    [Kubernetes service
              #    account](https://cloud.google.com/kubernetes-engine/docs/how-to/kubernetes-service-accounts).
              #    For example, `my-project.svc.id.goog[my-namespace/my-kubernetes-sa]`.
              #
              # * `group:{emailid}`: An email address that represents a Google group.
              #    For example, `admins@example.com`.
              #
              #
              # * `domain:{domain}`: The G Suite domain (primary) that represents all the
              #    users of that domain. For example, `google.com` or `example.com`.
              #
              #
              #
              #
              # * `principal://iam.googleapis.com/locations/global/workforcePools/{pool_id}/subject/{subject_attribute_value}`:
              #   A single identity in a workforce identity pool.
              #
              # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/group/{group_id}`:
              #   All workforce identities in a group.
              #
              # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/attribute.{attribute_name}/{attribute_value}`:
              #   All workforce identities with a specific attribute value.
              #
              # * `principalSet://iam.googleapis.com/locations/global/workforcePools/{pool_id}/*`:
              #   All identities in a workforce identity pool.
              #
              # * `principal://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/subject/{subject_attribute_value}`:
              #   A single identity in a workload identity pool.
              #
              # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/group/{group_id}`:
              #   A workload identity pool group.
              #
              # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/attribute.{attribute_name}/{attribute_value}`:
              #   All identities in a workload identity pool with a certain attribute.
              #
              # * `principalSet://iam.googleapis.com/projects/{project_number}/locations/global/workloadIdentityPools/{pool_id}/*`:
              #   All identities in a workload identity pool.
              #
              # * `deleted:user:{emailid}?uid={uniqueid}`: An email address (plus unique
              #    identifier) representing a user that has been recently deleted. For
              #    example, `alice@example.com?uid=123456789012345678901`. If the user is
              #    recovered, this value reverts to `user:{emailid}` and the recovered user
              #    retains the role in the binding.
              #
              # * `deleted:serviceAccount:{emailid}?uid={uniqueid}`: An email address (plus
              #    unique identifier) representing a service account that has been recently
              #    deleted. For example,
              #    `my-other-app@appspot.gserviceaccount.com?uid=123456789012345678901`.
              #    If the service account is undeleted, this value reverts to
              #    `serviceAccount:{emailid}` and the undeleted service account retains the
              #    role in the binding.
              #
              # * `deleted:group:{emailid}?uid={uniqueid}`: An email address (plus unique
              #    identifier) representing a Google group that has been recently
              #    deleted. For example, `admins@example.com?uid=123456789012345678901`. If
              #    the group is recovered, this value reverts to `group:{emailid}` and the
              #    recovered group retains the role in the binding.
              #
              # * `deleted:principal://iam.googleapis.com/locations/global/workforcePools/{pool_id}/subject/{subject_attribute_value}`:
              #   Deleted single identity in a workforce identity pool. For example,
              #   `deleted:principal://iam.googleapis.com/locations/global/workforcePools/my-pool-id/subject/my-subject-attribute-value`.
            "A String",
          ],
          "role": "A String", # Role that is assigned to the list of `members`, or principals.
              # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
              #
              # For an overview of the IAM roles and permissions, see the
              # [IAM documentation](https://cloud.google.com/iam/docs/roles-overview). For
              # a list of the available pre-defined roles, see
              # [here](https://cloud.google.com/iam/docs/understanding-roles).
        },
      ],
      "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
          # prevent simultaneous updates of a policy from overwriting each other.
          # It is strongly suggested that systems make use of the `etag` in the
          # read-modify-write cycle to perform policy updates in order to avoid race
          # conditions: An `etag` is returned in the response to `getIamPolicy`, and
          # systems are expected to put that etag in the request to `setIamPolicy` to
          # ensure that their change will be applied to the same version of the policy.
          #
          # **Important:** If you use IAM Conditions, you must include the `etag` field
          # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
          # you to overwrite a version `3` policy with a version `1` policy, and all of
          # the conditions in the version `3` policy are lost.
      "version": 42, # Specifies the format of the policy.
          #
          # Valid values are `0`, `1`, and `3`. Requests that specify an invalid value
          # are rejected.
          #
          # Any operation that affects conditional role bindings must specify version
          # `3`. This requirement applies to the following operations:
          #
          # * Getting a policy that includes a conditional role binding
          # * Adding a conditional role binding to a policy
          # * Changing a conditional role binding in a policy
          # * Removing any role binding, with or without a condition, from a policy
          #   that includes conditions
          #
          # **Important:** If you use IAM Conditions, you must include the `etag` field
          # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
          # you to overwrite a version `3` policy with a version `1` policy, and all of
          # the conditions in the version `3` policy are lost.
          #
          # If a policy does not include any conditions, operations on that policy may
          # specify any valid version or leave the field unset.
          #
          # To learn which resources support conditions in their IAM policies, see the
          # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
    }

`setSecurityPolicy(project, region, backendService, body=None, requestId=None, x__xgafv=None)`

    Sets the Google Cloud Armor security policy for the specified backend
    service. For more information, seeGoogle
    Cloud Armor Overview

    Args:
      project: string, Project ID for this request. (required)
      region: string, Name of the region scoping this request. (required)
      backendService: string, Name of the BackendService resource to which the security policy should be
    set. The name should conform to RFC1035. (required)
      body: object, The request body.
        The object takes the form of:

    {
      "securityPolicy": "A String",
    }

      requestId: string, An optional request ID to identify requests. Specify a unique request ID so
    that if you must retry your request, the server will know to ignore the
    request if it has already been completed.

    For example, consider a situation where you make an initial request and
    the request times out. If you make the request again with the same
    request ID, the server can check if original operation with the same
    request ID was received, and if so, will ignore the second request. This
    prevents clients from accidentally creating duplicate commitments.

    The request ID must be
    a valid UUID with the exception that zero UUID is not supported
    (00000000-0000-0000-0000-000000000000).
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Represents an Operation resource.
        #
        # Google Compute Engine has three Operation resources:
        #
        # * [Global](/compute/docs/reference/rest/beta/globalOperations)
        # * [Regional](/compute/docs/reference/rest/beta/regionOperations)
        # * [Zonal](/compute/docs/reference/rest/beta/zoneOperations)
        #
        # You can use an operation resource to manage asynchronous API requests.
        # For more information, readHandling
        # API responses.
        #
        # Operations can be global, regional or zonal.
        #
        #    - For global operations, use the `globalOperations`
        #    resource.
        #    - For regional operations, use the
        #    `regionOperations` resource.
        #    - For zonal operations, use
        #    the `zoneOperations` resource.
        #
        #
        #
        # For more information, read
        # Global, Regional, and Zonal Resources.
        #
        # Note that completed Operation resources have a limited
        # retention period.
      "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request.
          # Not present otherwise.
      "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
      "description": "A String", # [Output Only] A textual description of the operation, which is
          # set when the operation is created.
      "endTime": "A String", # [Output Only] The time that this operation was completed. This value is inRFC3339
          # text format.
      "error": { # [Output Only] If errors are generated during processing of the operation,
          # this field will be populated.
        "errors": [ # [Output Only] The array of errors encountered while processing this
            # operation.
          {
            "code": "A String", # [Output Only] The error type identifier for this error.
            "errorDetails": [ # [Output Only] An optional list of messages that contain the error
                # details. There is a set of defined message types to use for providing
                # details.The syntax depends on the error code. For example,
                # QuotaExceededInfo will have details when the error code is
                # QUOTA_EXCEEDED.
              {
                "errorInfo": { # Describes the cause of the error with structured details.
                    #
                    # Example of an error when contacting the "pubsub.googleapis.com" API when it
                    # is not enabled:
                    #
                    #     { "reason": "API_DISABLED"
                    #       "domain": "googleapis.com"
                    #       "metadata": {
                    #         "resource": "projects/123",
                    #         "service": "pubsub.googleapis.com"
                    #       }
                    #     }
                    #
                    # This response indicates that the pubsub.googleapis.com API is not enabled.
                    #
                    # Example of an error that is returned when attempting to create a Spanner
                    # instance in a region that is out of stock:
                    #
                    #     { "reason": "STOCKOUT"
                    #       "domain": "spanner.googleapis.com",
                    #       "metadata": {
                    #         "availableRegions": "us-central1,us-east2"
                    #       }
                    #     }
                  "domain": "A String", # The logical grouping to which the "reason" belongs. The error domain
                      # is typically the registered service name of the tool or product that
                      # generates the error. Example: "pubsub.googleapis.com". If the error is
                      # generated by some common infrastructure, the error domain must be a
                      # globally unique value that identifies the infrastructure. For Google API
                      # infrastructure, the error domain is "googleapis.com".
                  "metadatas": { # Additional structured details about this error.
                      #
                      # Keys must match a regular expression of `a-z+` but should
                      # ideally be lowerCamelCase. Also, they must be limited to 64 characters in
                      # length. When identifying the current value of an exceeded limit, the units
                      # should be contained in the key, not the value.  For example, rather than
                      # `{"instanceLimit": "100/request"}`, should be returned as,
                      # `{"instanceLimitPerRequest": "100"}`, if the client exceeds the number of
                      # instances that can be created in a single (batch) request.
                    "a_key": "A String",
                  },
                  "reason": "A String", # The reason of the error. This is a constant value that identifies the
                      # proximate cause of the error. Error reasons are unique within a particular
                      # domain of errors. This should be at most 63 characters and match a
                      # regular expression of `A-Z+[A-Z0-9]`, which represents
                      # UPPER_SNAKE_CASE.
                },
                "help": { # Provides links to documentation or for performing an out of band action.
                    #
                    # For example, if a quota check failed with an error indicating the calling
                    # project hasn't enabled the accessed service, this can contain a URL pointing
                    # directly to the right place in the developer console to flip the bit.
                  "links": [ # URL(s) pointing to additional information on handling the current error.
                    { # Describes a URL link.
                      "description": "A String", # Describes what the link offers.
                      "url": "A String", # The URL of the link.
                    },
                  ],
                },
                "localizedMessage": { # Provides a localized error message that is safe to return to the user
                    # which can be attached to an RPC error.
                  "locale": "A String", # The locale used following the specification defined at
                      # https://www.rfc-editor.org/rfc/bcp/bcp47.txt.
                      # Examples are: "en-US", "fr-CH", "es-MX"
                  "message": "A String", # The localized error message in the above locale.
                },
                "quotaInfo": { # Additional details for quota exceeded error for resource quota.
                  "dimensions": { # The map holding related quota dimensions.
                    "a_key": "A String",
                  },
                  "futureLimit": 3.14, # Future quota limit being rolled out. The limit's unit depends on the quota
                      #  type or metric.
                  "limit": 3.14, # Current effective quota limit. The limit's unit depends on the quota type
                      # or metric.
                  "limitName": "A String", # The name of the quota limit.
                  "metricName": "A String", # The Compute Engine quota metric name.
                  "rolloutStatus": "A String", # Rollout status of the future quota limit.
                },
              },
            ],
            "location": "A String", # [Output Only] Indicates the field in the request that caused the error.
                # This property is optional.
            "message": "A String", # [Output Only] An optional, human-readable error message.
          },
        ],
      },
      "getVersionOperationMetadata": {
        "inlineSbomInfo": {
          "currentComponentVersions": { # SBOM versions currently applied to the resource. The key is the component
              # name and the value is the version.
            "a_key": "A String",
          },
          "targetComponentVersions": { # SBOM versions scheduled for the next maintenance. The key is the
              # component name and the value is the version.
            "a_key": "A String",
          },
        },
      },
      "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error
          # message that was returned, such as `NOT FOUND`.
      "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error
          # status code that was returned. For example, a `404` means the
          # resource was not found.
      "id": "A String", # [Output Only] The unique identifier for the operation. This identifier is
          # defined by the server.
      "insertTime": "A String", # [Output Only] The time that this operation was requested.
          # This value is inRFC3339
          # text format.
      "instancesBulkInsertOperationMetadata": {
        "perLocationStatus": { # Status information per location (location name is key).
            # Example key: zones/us-central1-a
          "a_key": {
            "createdVmCount": 42, # [Output Only] Count of VMs successfully created so far.
            "deletedVmCount": 42, # [Output Only] Count of VMs that got deleted during rollback.
            "failedToCreateVmCount": 42, # [Output Only] Count of VMs that started creating but encountered an
                # error.
            "status": "A String", # [Output Only] Creation status of BulkInsert operation - information
                # if the flow is rolling forward or rolling back.
            "targetVmCount": 42, # [Output Only] Count of VMs originally planned to be created.
          },
        },
      },
      "kind": "compute#operation", # Output only. [Output Only] Type of the resource. Always `compute#operation` for
          # Operation resources.
      "name": "A String", # [Output Only] Name of the operation.
      "operationGroupId": "A String", # Output only. [Output Only] An ID that represents a group of operations, such as when a
          # group of operations results from a `bulkInsert` API request.
      "operationType": "A String", # [Output Only] The type of operation, such as `insert`,
          # `update`, or `delete`, and so on.
      "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100.
          # There is no requirement that this be linear or support any granularity of
          # operations. This should not be used to guess when the operation will be
          # complete. This number should monotonically increase as the operation
          # progresses.
      "region": "A String", # [Output Only] The URL of the region where the operation resides. Only
          # applicable when performing regional operations.
      "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
      "setCommonInstanceMetadataOperationMetadata": { # Output only. [Output Only] If the operation is for projects.setCommonInstanceMetadata,
          # this field will contain information on all underlying zonal actions and
          # their state.
        "clientOperationId": "A String", # [Output Only] The client operation id.
        "perLocationOperations": { # [Output Only] Status information per location (location name is key).
            # Example key: zones/us-central1-a
          "a_key": {
            "error": { # The `Status` type defines a logical error model that is suitable for # [Output Only] If state is `ABANDONED` or `FAILED`, this field is
                # populated.
                # different programming environments, including REST APIs and RPC APIs. It is
                # used by [gRPC](https://github.com/grpc). Each `Status` message contains
                # three pieces of data: error code, error message, and error details.
                #
                # You can find out more about this error model and how to work with it in the
                # [API Design Guide](https://cloud.google.com/apis/design/errors).
              "code": 42, # The status code, which should be an enum value of google.rpc.Code.
              "details": [ # A list of messages that carry the error details.  There is a common set of
                  # message types for APIs to use.
                {
                  "a_key": "", # Properties of the object. Contains field @type with type URL.
                },
              ],
              "message": "A String", # A developer-facing error message, which should be in English. Any
                  # user-facing error message should be localized and sent in the
                  # google.rpc.Status.details field, or localized by the client.
            },
            "state": "A String", # [Output Only] Status of the action, which can be one of the following:
                # `PROPAGATING`, `PROPAGATED`, `ABANDONED`, `FAILED`, or `DONE`.
          },
        },
      },
      "startTime": "A String", # [Output Only] The time that this operation was started by the server.
          # This value is inRFC3339
          # text format.
      "status": "A String", # [Output Only] The status of the operation, which can be one of the
          # following:
          # `PENDING`, `RUNNING`, or `DONE`.
      "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the
          # operation.
      "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation
          # of the target resource.
      "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies. For
          # operations related to creating a snapshot, this points to the disk
          # that the snapshot was created from.
      "user": "A String", # [Output Only] User who requested the operation, for example:
          # `user@example.com` or
          # `alice_smith_identifier (global/workforcePools/example-com-us-employees)`.
      "warnings": [ # [Output Only] If warning messages are generated during processing of the
          # operation, this field will be populated.
        {
          "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute
              # Engine returns NO_RESULTS_ON_PAGE if there
              # are no results in the response.
          "data": [ # [Output Only] Metadata about this warning in key:
              # value format. For example:
              #
              # "data": [
              #   {
              #    "key": "scope",
              #    "value": "zones/us-east1-d"
              #   }
            {
              "key": "A String", # [Output Only] A key that provides more detail on the warning being
                  # returned. For example, for warnings where there are no results in a list
                  # request for a particular zone, this key might be scope and
                  # the key value might be the zone name. Other examples might be a key
                  # indicating a deprecated resource and a suggested replacement, or a
                  # warning about invalid network settings (for example, if an instance
                  # attempts to perform IP forwarding but is not enabled for IP forwarding).
              "value": "A String", # [Output Only] A warning data value corresponding to the key.
            },
          ],
          "message": "A String", # [Output Only] A human-readable description of the warning code.
        },
      ],
      "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only
          # applicable when performing per-zone operations.
    }

`testIamPermissions(project, region, resource, body=None, x__xgafv=None)`

    Returns permissions that a caller has on the specified resource.

    Args:
      project: string, Project ID for this request. (required)
      region: string, The name of the region for this request. (required)
      resource: string, Name or id of the resource for this request. (required)
      body: object, The request body.
        The object takes the form of:

    {
      "permissions": [ # The set of permissions to check for the 'resource'. Permissions with
          # wildcards (such as '*' or 'storage.*') are not allowed.
        "A String",
      ],
    }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        {
      "permissions": [ # A subset of `TestPermissionsRequest.permissions` that the caller is
          # allowed.
        "A String",
      ],
    }

`update(project, region, backendService, body=None, requestId=None, x__xgafv=None)`

    Updates the specified regional BackendService resource with the data
    included in the request. For more information,
    see
    Backend services overview.

    Args:
      project: string, Project ID for this request. (required)
      region: string, Name of the region scoping this request. (required)
      backendService: string, Name of the BackendService resource to update. (required)
      body: object, The request body.
        The object takes the form of:

    { # Represents a Backend Service resource.
        #
        # A backend service defines how Google Cloud load balancers distribute traffic.
        # The backend service configuration contains a set of values, such as the
        # protocol used to connect to backends, various distribution and session
        # settings, health checks, and timeouts. These settings provide fine-grained
        # control over how your load balancer behaves. Most of the settings have
        # default values that allow for easy configuration if you need to get started
        # quickly.
        #
        # Backend services in Google Compute Engine can be either regionally or
        # globally scoped.
        #
        # * [Global](https://cloud.google.com/compute/docs/reference/rest/beta/backendServices)
        # * [Regional](https://cloud.google.com/compute/docs/reference/rest/beta/regionBackendServices)
        #
        # For more information, seeBackend
        # Services.
      "affinityCookieTtlSec": 42, # Lifetime of cookies in seconds. This setting is applicable to Application
          # Load Balancers and Traffic Director and requires
          # GENERATED_COOKIE or HTTP_COOKIE session affinity.
          #
          # If set to 0, the cookie is non-persistent and lasts only until
          # the end of the browser session (or equivalent). The maximum allowed value
          # is two weeks (1,209,600).
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
      "backends": [ # The list of backends that serve this BackendService.
        { # Message containing information of one individual backend.
          "balancingMode": "A String", # Specifies how to determine whether the backend of a load balancer can
              # handle additional traffic or is fully loaded. For usage guidelines, see
              # Connection balancing mode.
              #
              # Backends must use compatible balancing modes. For more information, see
              # Supported balancing modes and target capacity settings and
              # Restrictions and guidance for instance groups.
              #
              # Note: Currently, if you use the API to configure incompatible balancing
              # modes, the configuration might be accepted even though it has no impact
              # and is ignored. Specifically, Backend.maxUtilization is ignored when
              # Backend.balancingMode is RATE. In the future, this incompatible combination
              # will be rejected.
          "capacityScaler": 3.14, # A multiplier applied to the backend's target capacity of its balancing
              # mode.
              # The default value is 1, which means the group serves up to
              # 100% of its configured capacity (depending onbalancingMode). A setting of 0 means the group is
              # completely drained, offering 0% of its available capacity. The valid ranges
              # are 0.0 and [0.1,1.0].
              # You cannot configure a setting larger than 0 and smaller than0.1.
              # You cannot configure a setting of 0 when there is only one
              # backend attached to the backend service.
              #
              # Not available with backends that don't support using abalancingMode. This includes backends such as global
              # internet NEGs, regional serverless NEGs, and PSC NEGs.
          "customMetrics": [ # List of custom metrics that are used for CUSTOM_METRICS
              # BalancingMode.
            { # Custom Metrics are used for CUSTOM_METRICS balancing_mode.
              "dryRun": True or False, # If true, the metric data is collected and reported to Cloud
                  # Monitoring, but is not used for load balancing.
              "maxUtilization": 3.14, # Optional parameter to define a target utilization for the Custom Metrics
                  # balancing mode. The valid range is [0.0, 1.0].
              "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
                  # long and match the regular expression
                  # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
                  # first character must be a lowercase letter, and all following
                  # characters must be a dash, period, underscore, lowercase letter, or
                  # digit, except the last character, which cannot be a dash, period, or
                  # underscore. For usage guidelines, see Custom Metrics balancing mode. This
                  # field can only be used for a global or regional backend service with the
                  # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
            },
          ],
          "description": "A String", # An optional description of this resource. Provide this property when you
              # create the resource.
          "failover": True or False, # This field designates whether this is a failover backend. More than one
              # failover backend can be configured for a given BackendService.
          "group": "A String", # The fully-qualified URL of aninstance
              # group or network endpoint
              # group (NEG) resource. To determine what types of backends a load
              # balancer supports, see the [Backend services
              # overview](https://cloud.google.com/load-balancing/docs/backend-service#backends).
              #
              # You must use the *fully-qualified* URL (starting withhttps://www.googleapis.com/) to specify the instance group
              # or NEG. Partial URLs are not supported.
              #
              # If haPolicy is specified, backends must refer to NEG resources of type
              # GCE_VM_IP.
          "maxConnections": 42, # Defines a target maximum number of simultaneous connections. For usage
              # guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode. Not available if the backend'sbalancingMode is RATE.
          "maxConnectionsPerEndpoint": 42, # Defines a target maximum number of simultaneous connections.  For usage
              # guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isRATE.
          "maxConnectionsPerInstance": 42, # Defines a target maximum number of simultaneous connections.
              # For usage guidelines, seeConnection
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isRATE.
          "maxInFlightRequests": 42, # Defines a maximum number of in-flight requests for the whole NEG or
              # instance group. Not available if backend's balancingMode isRATE or CONNECTION.
          "maxInFlightRequestsPerEndpoint": 42, # Defines a maximum number of in-flight requests for a single endpoint.
              # Not available if backend's balancingMode is RATE
              # or CONNECTION.
          "maxInFlightRequestsPerInstance": 42, # Defines a maximum number of in-flight requests for a single VM.
              # Not available if backend's balancingMode is RATE
              # or CONNECTION.
          "maxRate": 42, # Defines a maximum number of HTTP requests per second (RPS). For
              # usage guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxRatePerEndpoint": 3.14, # Defines a maximum target for requests per second (RPS). For usage
              # guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxRatePerInstance": 3.14, # Defines a maximum target for requests per second (RPS). For usage
              # guidelines, seeRate
              # balancing mode and Utilization
              # balancing mode.
              #
              # Not available if the backend's balancingMode isCONNECTION.
          "maxUtilization": 3.14, # Optional parameter to define a target capacity for theUTILIZATION balancing mode. The valid range is[0.0, 1.0].
              #
              # For usage guidelines, seeUtilization
              # balancing mode.
          "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend.
              # the backend.
            "resourceUri": "A String", # The URI of the resource or system that manages the backend.
          },
          "preference": "A String", # This field indicates whether this backend should be fully utilized before
              # sending traffic to backends with default preference. The possible values
              # are:
              #
              #    - PREFERRED: Backends with this preference level will be
              #    filled up to their capacity limits first, based on RTT.
              #    - DEFAULT:  If preferred backends don't have enough
              #    capacity, backends in this layer would be used and traffic would be
              #    assigned based on the load balancing algorithm you use. This is the
              #    default
          "service": "A String", # Represents a service backend (e.g., Cloud Run service, PSC Service
              # Attachment).
              # e.g.
              #  "run.googleapis.com/projects/123456789/locations/us-central1/services/my-service"
              #  for Cloud Run service.
              #  "compute.googleapis.com/projects/123456789/regions/us-central1/serviceAttachments/my-service-attachment"
              #  for PSC Service Attachment.
          "trafficDuration": "A String",
        },
      ],
      "cdnPolicy": { # Message containing Cloud CDN configuration for a backend service. # Cloud CDN configuration for this BackendService. Only available for
          # specified load balancer types.
        "bypassCacheOnRequestHeaders": [ # Bypass the cache when the specified request headers are matched - e.g.
            # Pragma or Authorization headers. Up to 5 headers can be specified.
            # The cache is bypassed for all cdnPolicy.cacheMode settings.
          { # Bypass the cache when the specified request headers are present,
              # e.g. Pragma or Authorization headers. Values are case insensitive.
              # The presence of such a header overrides the cache_mode setting.
            "headerName": "A String", # The header field name to match on when bypassing cache.
                # Values are case-insensitive.
          },
        ],
        "cacheKeyPolicy": { # Message containing what to include in the cache key for a request for Cloud # The CacheKeyPolicy for this CdnPolicy.
            # CDN.
          "includeHost": True or False, # If true, requests to different hosts will be cached separately.
          "includeHttpHeaders": [ # Allows HTTP request headers (by name) to be used in the cache key.
            "A String",
          ],
          "includeNamedCookies": [ # Allows HTTP cookies (by name) to be used in the cache key.
              # The name=value pair will be used in the cache key Cloud CDN generates.
            "A String",
          ],
          "includeProtocol": True or False, # If true, http and https requests will be cached separately.
          "includeQueryString": True or False, # If true, include query string parameters in the cache key according to
              # query_string_whitelist and query_string_blacklist. If neither is set, the
              # entire query string will be included. If false, the query string will be
              # excluded from the cache key entirely.
          "queryStringBlacklist": [ # Names of query string parameters to exclude in cache keys. All other
              # parameters will be included. Either specify query_string_whitelist or
              # query_string_blacklist, not both. '&' and '=' will be percent encoded and
              # not treated as delimiters.
            "A String",
          ],
          "queryStringWhitelist": [ # Names of query string parameters to include in cache keys. All other
              # parameters will be excluded. Either specify query_string_whitelist or
              # query_string_blacklist, not both. '&' and '=' will be percent encoded and
              # not treated as delimiters.
            "A String",
          ],
        },
        "cacheMode": "A String", # Specifies the cache setting for all responses from this backend.
            # The possible values are:USE_ORIGIN_HEADERS Requires the origin to set valid caching
            # headers to cache content. Responses without these headers will not be
            # cached at Google's edge, and will require a full trip to the origin on
            # every request, potentially impacting performance and increasing load on
            # the origin server.FORCE_CACHE_ALL Cache all content, ignoring any "private",
            # "no-store" or "no-cache" directives in Cache-Control response headers.
            # Warning: this may result in Cloud CDN caching private,
            # per-user (user identifiable) content.CACHE_ALL_STATIC Automatically cache static content,
            # including common image formats, media (video and audio), and web assets
            # (JavaScript and CSS). Requests and responses that are marked as
            # uncacheable, as well as dynamic content (including HTML), will not be
            # cached.
            #
            # If no value is provided for cdnPolicy.cacheMode, it defaults
            # to CACHE_ALL_STATIC.
        "clientTtl": 42, # Specifies a separate client (e.g. browser client) maximum TTL. This is
            # used to clamp the max-age (or Expires) value sent to the client.  With
            # FORCE_CACHE_ALL, the lesser of client_ttl and default_ttl is used for the
            # response max-age directive, along with a "public" directive.  For
            # cacheable content in CACHE_ALL_STATIC mode, client_ttl clamps the max-age
            # from the origin (if specified), or else sets the response max-age
            # directive to the lesser of the client_ttl and default_ttl, and also
            # ensures a "public" cache-control directive is present.
            # If a client TTL is not specified, a default value (1 hour) will be used.
            # The maximum allowed value is 31,622,400s (1 year).
        "defaultTtl": 42, # Specifies the default TTL for cached content served by this origin for
            # responses that do not have an existing valid TTL (max-age or s-maxage).
            # Setting a TTL of "0" means "always revalidate".
            # The value of defaultTTL cannot be set to a value greater than that of
            # maxTTL, but can be equal.
            # When the cacheMode is set to FORCE_CACHE_ALL, the defaultTTL
            # will overwrite the TTL set in all responses. The maximum allowed value is
            # 31,622,400s (1 year), noting that infrequently accessed objects may be
            # evicted from the cache before the defined TTL.
        "maxTtl": 42, # Specifies the maximum allowed TTL for cached content served by this
            # origin.
            # Cache directives that attempt to set a max-age or s-maxage higher than
            # this, or an Expires header more than maxTTL seconds in the future will
            # be capped at the value of maxTTL, as if it were the value of an
            # s-maxage Cache-Control directive.
            # Headers sent to the client will not be modified.
            # Setting a TTL of "0" means "always revalidate".
            # The maximum allowed value is 31,622,400s (1 year), noting that
            # infrequently accessed objects may be evicted from the cache before
            # the defined TTL.
        "negativeCaching": True or False, # Negative caching allows per-status code TTLs to be set, in order
            # to apply fine-grained caching for common errors or redirects.
            # This can reduce the load on your origin and improve end-user
            # experience by reducing response latency.
            # When the cache mode is set to CACHE_ALL_STATIC or USE_ORIGIN_HEADERS,
            # negative caching applies to responses with the specified response code
            # that lack any Cache-Control, Expires, or Pragma: no-cache directives.
            # When the cache mode is set to FORCE_CACHE_ALL, negative caching applies
            # to all responses with the specified response code, and override any
            # caching headers.
            # By default, Cloud CDN will apply the following default TTLs to these
            # status codes:
            # HTTP 300 (Multiple Choice), 301, 308 (Permanent Redirects): 10m
            # HTTP 404 (Not Found), 410 (Gone),
            # 451 (Unavailable For Legal Reasons): 120s
            # HTTP 405 (Method Not Found), 501 (Not Implemented): 60s.
            # These defaults can be overridden in negative_caching_policy.
        "negativeCachingPolicy": [ # Sets a cache TTL for the specified HTTP status code.
            # negative_caching must be enabled to configure negative_caching_policy.
            # Omitting the policy and leaving negative_caching enabled will use
            # Cloud CDN's default cache TTLs.
            # Note that when specifying an explicit negative_caching_policy, you
            # should take care to specify a cache TTL for all response codes
            # that you wish to cache. Cloud CDN will not apply any default
            # negative caching when a policy exists.
          { # Specify CDN TTLs for response error codes.
            "code": 42, # The HTTP status code to define a TTL against. Only HTTP status codes
                # 300, 301, 302, 307, 308, 404, 405, 410, 421, 451 and 501 can be
                # specified as values, and you cannot specify a status code more than
                # once.
            "ttl": 42, # The TTL (in seconds) for which to cache responses with the
                # corresponding status code.
                # The maximum allowed value is 1800s (30 minutes), noting that
                # infrequently accessed objects may be evicted from the cache before the
                # defined TTL.
          },
        ],
        "requestCoalescing": True or False, # If true then Cloud CDN will combine multiple concurrent cache fill
            # requests into a small number of requests to the origin.
        "serveWhileStale": 42, # Serve existing content from the cache (if available) when revalidating
            # content with the origin, or when an error is encountered when refreshing
            # the cache.
            # This setting defines the default "max-stale" duration for any cached
            # responses that do not specify a max-stale directive. Stale responses that
            # exceed the TTL configured here will not be served. The default limit
            # (max-stale) is 86400s (1 day), which will allow stale content to be
            # served up to this limit beyond the max-age (or s-maxage) of a cached
            # response.
            # The maximum allowed value is 604800 (1 week).
            # Set this to zero (0) to disable serve-while-stale.
        "signedUrlCacheMaxAgeSec": "A String", # Maximum number of seconds the response to a signed URL request will be
            # considered fresh. After this time period, the response will be
            # revalidated before being served. Defaults to 1hr (3600s).  When serving
            # responses to signed URL requests, Cloud CDN will internally behave as
            # though all responses from this backend had a "Cache-Control:
            # public, max-age=[TTL]" header, regardless of any existing
            # Cache-Control header. The actual headers served in responses will not be
            # altered.
        "signedUrlKeyNames": [ # [Output Only] Names of the keys for signing request URLs.
          "A String",
        ],
      },
      "circuitBreakers": { # Settings controlling the volume of requests, connections and retries to this
          # backend service.
        "connectTimeout": { # A Duration represents a fixed-length span of time represented # The timeout for new network connections to hosts.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "maxConnections": 42, # The maximum number of connections to the backend service. If not specified,
            # there is no limit.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxPendingRequests": 42, # The maximum number of pending requests allowed to the backend service. If
            # not specified, there is no limit.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxRequests": 42, # The maximum number of parallel requests that allowed to the backend
            # service. If not specified, there is no limit.
        "maxRequestsPerConnection": 42, # Maximum requests for a single connection to the backend service.
            # This parameter is respected by both the HTTP/1.1 and HTTP/2
            # implementations. If not specified, there is no limit. Setting this
            # parameter to 1 will effectively disable keep alive.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
        "maxRetries": 42, # The maximum number of parallel retries allowed to the backend cluster. If
            # not specified, the default is 1.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
      },
      "compressionMode": "A String", # Compress text responses using Brotli or gzip compression, based on
          # the client's Accept-Encoding header.
      "connectionDraining": { # Message containing connection draining configuration. # connectionDraining cannot be specified with haPolicy.
        "drainingTimeoutSec": 42, # Configures a duration timeout for existing requests on a removed backend
            # instance. For supported load balancers and protocols, as described inEnabling
            # connection draining.
      },
      "connectionTrackingPolicy": { # Connection Tracking configuration for this BackendService. # Connection Tracking configuration for this BackendService. Connection
          # tracking policy settings are only available for external passthrough
          # Network Load Balancers and internal passthrough Network Load Balancers.
          #
          # connectionTrackingPolicy cannot be specified with haPolicy.
        "connectionPersistenceOnUnhealthyBackends": "A String", # Specifies connection persistence when backends are unhealthy. The default
            # value is DEFAULT_FOR_PROTOCOL.
            #
            # If set to DEFAULT_FOR_PROTOCOL, the existing connections
            # persist on unhealthy backends only for connection-oriented protocols
            # (TCP and SCTP) and only if the Tracking Mode isPER_CONNECTION (default tracking mode) or the Session
            # Affinity is configured for 5-tuple. They do not persist forUDP.
            #
            # If set to NEVER_PERSIST, after a backend becomes unhealthy,
            # the existing connections on the unhealthy backend are never persisted on
            # the unhealthy backend. They are always diverted to newly selected healthy
            # backends (unless all backends are unhealthy).
            #
            # If set to ALWAYS_PERSIST, existing connections always
            # persist on unhealthy backends regardless of protocol and session
            # affinity. It is generally not recommended to use this mode overriding the
            # default.
            #
            # For more details, see [Connection Persistence for Network Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#connection-persistence)
            # and [Connection Persistence for Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal#connection-persistence).
        "enableStrongAffinity": True or False, # Enable Strong Session Affinity for external passthrough Network Load
            # Balancers. This option is not available publicly.
        "idleTimeoutSec": 42, # Specifies how long to keep a Connection Tracking entry while there is no
            # matching traffic (in seconds).
            #
            # For internal passthrough Network Load Balancers:
            #
            #    - The minimum (default) is 10 minutes and the maximum is 16 hours.
            #    - It can be set only if Connection Tracking is less than 5-tuple
            #    (i.e. Session Affinity is CLIENT_IP_NO_DESTINATION,CLIENT_IP or CLIENT_IP_PROTO, and Tracking
            #    Mode is PER_SESSION).
            #
            #
            #
            # For external passthrough Network Load Balancers the default is 60
            # seconds. This option is not available publicly.
        "trackingMode": "A String", # Specifies the key used for connection tracking. There are two
            # options:
            #
            #    - PER_CONNECTION: This is the default mode. The Connection
            #    Tracking is performed as per the Connection Key (default Hash Method) for
            #    the specific protocol.
            #    - PER_SESSION: The Connection Tracking is performed as per
            #    the configured Session Affinity. It matches the configured Session
            #    Affinity.
            #
            #
            #
            # For more details, see [Tracking Mode for Network Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#tracking-mode)
            # and [Tracking Mode for Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal#tracking-mode).
      },
      "consistentHash": { # This message defines settings for a consistent hash style load balancer. # Consistent Hash-based load balancing can be used to provide soft session
          # affinity based on HTTP headers, cookies or other properties. This load
          # balancing policy is applicable only for HTTP connections. The affinity to a
          # particular destination host will be lost when one or more hosts are
          # added/removed from the destination service. This field specifies parameters
          # that control consistent hashing. This field is only applicable whenlocalityLbPolicy is set to MAGLEV orRING_HASH.
          #
          # This field is applicable to either:
          #
          #    - A regional backend service with the service protocol set to HTTP,
          #    HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
          #    INTERNAL_MANAGED.
          #    - A global backend service with the
          #    load_balancing_scheme set to INTERNAL_SELF_MANAGED.
        "httpCookie": { # The information about the HTTP Cookie on which the hash function is based # Hash is based on HTTP Cookie. This field describes a HTTP cookie that will
            # be used as the hash key for the consistent hash load balancer. If the
            # cookie is not present, it will be generated. This field is applicable if
            # the sessionAffinity is set to HTTP_COOKIE.
            #
            # Not supported when the backend service is referenced by a URL map that is
            # bound to target gRPC proxy that has validateForProxyless field set to true.
            # for load balancing policies that use a consistent hash.
          "name": "A String", # Name of the cookie.
          "path": "A String", # Path to set for the cookie.
          "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
              # as a count of seconds and fractions of seconds at nanosecond
              # resolution. It is independent of any calendar and concepts like "day"
              # or "month". Range is approximately 10,000 years.
            "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
                # Durations less than one second are represented with a 0
                # `seconds` field and a positive `nanos` field. Must be from 0
                # to 999,999,999 inclusive.
            "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
                # to 315,576,000,000 inclusive. Note: these bounds are computed from:
                # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
          },
        },
        "httpHeaderName": "A String", # The hash based on the value of the specified header field. This field is
            # applicable if the sessionAffinity is set toHEADER_FIELD.
        "minimumRingSize": "A String", # The minimum number of virtual nodes to use for the hash ring. Defaults to
            # 1024. Larger ring sizes result in more granular load distributions. If the
            # number of hosts in the load balancing pool is larger than the ring size,
            # each host will be assigned a single virtual node.
      },
      "creationTimestamp": "A String", # Output only. [Output Only] Creation timestamp inRFC3339
          # text format.
      "customMetrics": [ # List of custom metrics that are used for theWEIGHTED_ROUND_ROBIN locality_lb_policy.
        { # Custom Metrics are used for WEIGHTED_ROUND_ROBIN
            # locality_lb_policy.
          "dryRun": True or False, # If true, the metric data is not used for load balancing.
          "name": "A String", # Name of a custom utilization signal. The name must be 1-64 characters
              # long and match the regular expression
              # `[a-z]([-_.a-z0-9]*[a-z0-9])?` which means that the
              # first character must be a lowercase letter, and all following
              # characters must be a dash, period, underscore, lowercase letter, or
              # digit, except the last character, which cannot be a dash, period, or
              # underscore. For usage guidelines, see Custom Metrics balancing mode. This
              # field can only be used for a global or regional backend service with the
              # loadBalancingScheme set to EXTERNAL_MANAGED,INTERNAL_MANAGED INTERNAL_SELF_MANAGED.
        },
      ],
      "customRequestHeaders": [ # Headers that the load balancer adds to proxied requests. See [Creating
          # custom
          # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
        "A String",
      ],
      "customResponseHeaders": [ # Headers that the load balancer adds to proxied responses. See [Creating
          # custom
          # headers](https://cloud.google.com/load-balancing/docs/custom-headers).
        "A String",
      ],
      "description": "A String", # An optional description of this resource. Provide this property when you
          # create the resource.
      "dynamicForwarding": { # Defines a dynamic forwarding configuration for the backend service. # Dynamic forwarding configuration. This field is used to configure the
          # backend service with dynamic forwarding feature which together with Service
          # Extension allows customized and complex routing logic.
        "forwardProxy": { # Defines Dynamic Forwarding Proxy configuration. # Dynamic Forwarding Proxy configuration.
          "enabled": True or False, # A boolean flag enabling dynamic forwarding proxy.
          "proxyMode": "A String", # Determines the dynamic forwarding proxy mode.
        },
        "ipPortSelection": { # Defines a IP:PORT based dynamic forwarding configuration for the backend # IP:PORT based dynamic forwarding configuration.
            # service. Some ranges are restricted: Restricted
            # ranges.
          "enabled": True or False, # A boolean flag enabling IP:PORT based dynamic forwarding.
        },
      },
      "edgeSecurityPolicy": "A String", # [Output Only] The resource URL for the edge security policy associated with
          # this backend service.
      "enableCDN": True or False, # If true, enables Cloud CDN for the backend service of a
          # global external Application Load Balancer.
      "externalManagedMigrationState": "A String", # Specifies the canary migration state. Possible values are PREPARE,
          # TEST_BY_PERCENTAGE, and TEST_ALL_TRAFFIC.
          #
          # To begin the migration from EXTERNAL to EXTERNAL_MANAGED, the state must be
          # changed to PREPARE. The state must be changed to TEST_ALL_TRAFFIC before
          # the loadBalancingScheme can be changed to EXTERNAL_MANAGED. Optionally, the
          # TEST_BY_PERCENTAGE state can be used to migrate traffic by percentage using
          # externalManagedMigrationTestingPercentage.
          #
          # Rolling back a migration requires the states to be set in reverse order. So
          # changing the scheme from EXTERNAL_MANAGED to EXTERNAL requires the state to
          # be set to TEST_ALL_TRAFFIC at the same time. Optionally, the
          # TEST_BY_PERCENTAGE state can be used to migrate some traffic back to
          # EXTERNAL or PREPARE can be used to migrate all traffic back to EXTERNAL.
      "externalManagedMigrationTestingPercentage": 3.14, # Determines the fraction of requests that should be processed by the Global
          # external Application Load Balancer.
          #
          # The value of this field must be in the range [0, 100].
          #
          # Session affinity options will slightly affect this routing behavior, for
          # more details, see:Session
          # Affinity.
          #
          # This value can only be set if the loadBalancingScheme in the BackendService
          # is set to EXTERNAL (when using the classic Application Load Balancer) and
          # the migration state is TEST_BY_PERCENTAGE.
      "failoverPolicy": { # For load balancers that have configurable # Requires at least one backend instance group to be defined
          # as a backup (failover) backend.
          # For load balancers that have configurable failover:
          # [Internal passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
          # and [external passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
          #
          # failoverPolicy cannot be specified with haPolicy.
          # failover:
          # [Internal passthrough Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
          # and [external passthrough
          # Network Load
          # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
          # On failover or failback, this field indicates whether connection draining
          # will be honored. Google Cloud has a fixed connection draining timeout of
          # 10 minutes. A setting of true terminates existing TCP
          # connections to the active pool during failover and failback, immediately
          # draining traffic. A setting of false allows existing TCP
          # connections to persist, even on VMs no longer in the active pool, for up
          # to the duration of the connection draining timeout (10 minutes).
        "disableConnectionDrainOnFailover": True or False, # This can be set to true if the protocol isTCP, UDP, or UNSPECIFIED.
            #
            # The default is false.
        "dropTrafficIfUnhealthy": True or False, # If set to true, connections to the
            # load balancer are dropped when all primary and all backup backend VMs are
            # unhealthy.If set to false, connections are distributed
            # among all primary VMs when all primary and all backup backend VMs are
            #  unhealthy.
            # For load balancers that have configurable
            # failover:
            # [Internal passthrough
            # Network Load
            # Balancers](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
            # and [external passthrough
            # Network Load
            # Balancers](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
            # The default is false.
        "failoverRatio": 3.14, # The value of the field must be in the range[0, 1]. If the value is 0, the load balancer performs a
            # failover when the number of healthy primary VMs equals zero.
            # For all other values, the load balancer performs a failover when the
            # total number of healthy primary VMs is less than this ratio.
            # For load balancers that have configurable
            # failover:
            # [Internal TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/internal/failover-overview)
            # and [external TCP/UDP Load
            # Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-failover-overview).
      },
      "fingerprint": "A String", # Fingerprint of this resource. A hash of the contents stored in this object.
          # This field is used in optimistic locking. This field will be ignored when
          # inserting a BackendService. An up-to-date fingerprint must be provided in
          # order to update the BackendService, otherwise the request will
          # fail with error 412 conditionNotMet.
          #
          # To see the latest fingerprint, make a get() request to
          # retrieve a BackendService.
      "haPolicy": { # Configures self-managed High Availability (HA) for External and Internal
          # Protocol Forwarding.
          #
          # The backends of this regional backend service must only specify zonal
          # network endpoint groups (NEGs) of type GCE_VM_IP.
          #
          # When haPolicy is set for an Internal Passthrough Network Load Balancer, the
          # regional backend service must set the network field. All zonal NEGs must
          # belong to the same network. However, individual NEGs can
          # belong to different subnetworks of that network.
          #
          # When haPolicy is specified, the set of attached network endpoints across
          # all backends comprise an High Availability domain from which one endpoint
          # is selected as the active endpoint (the leader) that receives all
          # traffic.
          #
          # haPolicy can be added only at backend service creation time. Once set up,
          # it cannot be deleted.
          #
          # Note that haPolicy is not for load balancing, and therefore cannot be
          # specified with sessionAffinity, connectionTrackingPolicy, and
          # failoverPolicy.
          #
          # haPolicy requires customers to be responsible for tracking backend
          # endpoint health and electing a leader among the healthy endpoints.
          # Therefore, haPolicy cannot be specified with healthChecks.
          #
          # haPolicy can only be specified for External Passthrough Network Load
          # Balancers and Internal Passthrough Network Load Balancers.
        "fastIPMove": "A String", # Specifies whether fast IP move is enabled, and if so, the mechanism to
            # achieve it.
            #
            # Supported values are:
            #
            #    - DISABLED: Fast IP Move is disabled. You can only use the
            #    haPolicy.leader API to update the leader.
            #    - >GARP_RA: Provides a method to very quickly define a new network
            #    endpoint as the leader. This method is faster than updating the leader
            #    using the haPolicy.leader API. Fast IP move works as follows: The VM
            #    hosting the network endpoint that should become the new leader sends
            #    either a Gratuitous ARP (GARP) packet (IPv4) or an ICMPv6 Router
            #    Advertisement(RA) packet (IPv6).  Google Cloud immediately but
            #    temporarily associates the forwarding rule IP address with that VM, and
            #    both new and in-flight packets are quickly delivered to that VM.
            #
            #
            #
            # Note the important properties of the Fast IP Move functionality:
            #
            #    - The GARP/RA-initiated re-routing stays active for approximately 20
            #    minutes. After triggering fast failover, you must also
            #    appropriately set the haPolicy.leader.
            #    -  The new leader instance should continue to send GARP/RA packets
            #    periodically every 10 seconds until at least 10 minutes after updating
            #    the haPolicy.leader (but stop immediately if it is no longer the leader).
            #    - After triggering a fast failover, we recommend that you wait at least
            #    3 seconds before sending another GARP/RA packet from a different VM
            #    instance to avoid race conditions.
            #    - Don't send GARP/RA packets from different VM
            #    instances at the same time. If multiple instances continue to send
            #    GARP/RA packets, traffic might be routed to different destinations in an
            #    alternating order. This condition ceases when a single instance
            #    issues a GARP/RA packet.
            #    - The GARP/RA request always takes priority over the leader API.
            #    Using the haPolicy.leader API to change the leader to a different
            #    instance will have no effect until the GARP/RA request becomes
            #    inactive.
            #    - The GARP/RA packets should follow the GARP/RA
            #    Packet Specifications..
            #    -  When multiple forwarding rules refer to a regional backend service,
            #    you need only send a GARP or RA packet for a single forwarding rule
            #    virtual IP. The virtual IPs for all forwarding rules targeting the same
            #    backend service will also be moved to the sender of the GARP or RA
            #    packet.
            #
            #
            #
            # The following are the Fast IP Move limitations (that is, when fastIPMove
            # is not DISABLED):
            #
            #    - Multiple forwarding rules cannot use the same IP address if one of
            #    them refers to a regional backend service with fastIPMove.
            #    - The regional backend service must set the network field, and all
            #    NEGs must belong to that network. However, individual
            #    NEGs can belong to different subnetworks of that network.
            #    - The maximum number of network endpoints across all backends of a
            #    backend service with fastIPMove is 32.
            #    - The maximum number of backend services with fastIPMove that can have
            #    the same network endpoint attached to one of its backends is 64.
            #    - The maximum number of backend services with fastIPMove in a VPC in a
            #    region is 64.
            #    - The network endpoints that are attached to a backend of a backend
            #    service with fastIPMove cannot resolve to Gen3+ machines for IPv6.
            #    - Traffic directed to the leader by a static route next hop will not be
            #    redirected to a new leader by fast failover. Such traffic will only be
            #    redirected once an haPolicy.leader update has taken effect. Only traffic
            #    to the forwarding rule's virtual IP will be redirected to a new leader by
            #    fast failover.
            #
            #
            # haPolicy.fastIPMove can be set only at backend service creation time.
            # Once set, it cannot be updated.
            #
            # By default, fastIpMove is set to DISABLED.
        "leader": { # Selects one of the network endpoints attached to the backend NEGs of
            # this service as the active endpoint (the leader) that receives all
            # traffic.
            #
            # When the leader changes, there is no connection draining to persist
            # existing connections on the old leader.
            #
            # You are responsible for selecting a suitable endpoint as the
            # leader. For example, preferring a healthy endpoint over unhealthy ones.
            # Note that this service does not track backend endpoint health, and
            # selects the configured leader unconditionally.
          "backendGroup": "A String", # A fully-qualified URL (starting with https://www.googleapis.com/)
              # of the zonal Network Endpoint Group (NEG) with `GCE_VM_IP` endpoints
              # that the leader is attached to.
              #
              # The leader's backendGroup must already be specified as a backend of
              # this backend service. Removing a backend that is designated as the
              # leader's backendGroup is not permitted.
          "networkEndpoint": { # The network endpoint within the leader.backendGroup that is
              # designated as the leader.
              #
              # This network endpoint cannot be detached from the NEG specified in
              # the haPolicy.leader.backendGroup until the leader is updated with
              # another network endpoint, or the leader is removed from the haPolicy.
            "instance": "A String", # The name of the VM instance of the leader network endpoint. The
                # instance must already be attached to the NEG specified in the
                # haPolicy.leader.backendGroup.
                #
                # The name must be 1-63 characters long, and comply with RFC1035.
                # Authorization requires the following IAM permission on the
                # specified resource instance: compute.instances.use
          },
        },
      },
      "healthChecks": [ # The list of URLs to the healthChecks, httpHealthChecks (legacy), or
          # httpsHealthChecks (legacy) resource for health checking this backend
          # service. Not all backend services support legacy health checks. See
          # Load balancer guide. Currently, at most one health check can be
          # specified for each backend service. Backend services with
          # instance group or zonal NEG backends must have a health check unless
          # haPolicy is specified. Backend services with internet or serverless NEG
          # backends must not have a health check.
          #
          # healthChecks[] cannot be specified with haPolicy.
        "A String",
      ],
      "iap": { # Identity-Aware Proxy # The configurations for Identity-Aware Proxy on this resource.
          # Not available for internal passthrough Network Load Balancers and external
          # passthrough Network Load Balancers.
        "enabled": True or False, # Whether the serving infrastructure will authenticate and authorize all
            # incoming requests.
        "oauth2ClientId": "A String", # OAuth2 client ID to use for the authentication flow.
        "oauth2ClientSecret": "A String", # OAuth2 client secret to use for the authentication flow.
            # For security reasons, this value cannot be retrieved via the API.
            # Instead, the SHA-256 hash of the value is returned in the
            # oauth2ClientSecretSha256 field.
            #
            # @InputOnly
        "oauth2ClientSecretSha256": "A String", # Output only. [Output Only] SHA256 hash value for the field oauth2_client_secret above.
      },
      "id": "A String", # [Output Only] The unique identifier for the resource. This identifier is
          # defined by the server.
      "ipAddressSelectionPolicy": "A String", # Specifies a preference for traffic sent from the proxy to the backend (or
          # from the client to the backend for proxyless gRPC).
          # The possible values are:
          #
          #    - IPV4_ONLY: Only send IPv4 traffic to the backends of the
          #    backend service (Instance Group, Managed Instance Group, Network Endpoint
          #    Group), regardless of traffic from the client to the proxy. Only IPv4
          #    health checks are used to check the health of the backends. This is the
          #    default setting.
          #    - PREFER_IPV6: Prioritize the connection to the endpoint's
          #    IPv6 address over its IPv4 address (provided there is a healthy IPv6
          #    address).
          #    - IPV6_ONLY: Only send IPv6 traffic to the backends of the
          #    backend service (Instance Group, Managed Instance Group, Network Endpoint
          #    Group), regardless of traffic from the client to the proxy. Only IPv6
          #    health checks are used to check the health of the backends.
          #
          #
          #
          # This field is applicable to either:
          #
          #    -  Advanced global external Application Load Balancer (load balancing
          #    scheme EXTERNAL_MANAGED),
          #    -  Regional external Application Load
          #    Balancer,
          #    -  Internal proxy Network Load Balancer (load balancing
          #    scheme INTERNAL_MANAGED),
          #    -  Regional internal Application Load
          #    Balancer (load balancing scheme INTERNAL_MANAGED),
          #    -  Traffic
          #    Director with Envoy proxies and proxyless gRPC (load balancing scheme
          #    INTERNAL_SELF_MANAGED).
      "kind": "compute#backendService", # Output only. [Output Only] Type of resource. Always compute#backendService
          # for backend services.
      "loadBalancingScheme": "A String", # Specifies the load balancer type. A backend service
          # created for one type of load balancer cannot be used with another.
          # For more information, refer toChoosing
          # a load balancer.
      "localityLbPolicies": [ # A list of locality load-balancing policies to be used in order of
          # preference. When you use localityLbPolicies, you must set at least one
          # value for either the localityLbPolicies[].policy or the
          # localityLbPolicies[].customPolicy field. localityLbPolicies overrides any
          # value set in the localityLbPolicy field.
          #
          # For an example of how to use this field, seeDefine
          # a list of preferred policies.
          #
          # Caution: This field and its children are intended for use in a service mesh
          # that includes gRPC clients only. Envoy proxies can't use backend services
          # that have this configuration.
        { # Container for either a built-in LB policy supported by gRPC or Envoy or
            # a custom one implemented by the end user.
          "customPolicy": { # The configuration for a custom policy implemented by the user and
              # deployed with the client.
            "data": "A String", # An optional, arbitrary JSON object with configuration data, understood
                # by a locally installed custom policy implementation.
            "name": "A String", # Identifies the custom policy.
                #
                # The value should match the name of a custom implementation registered
                # on the gRPC clients. It should follow protocol buffer message naming
                # conventions and include the full path (for example,
                # myorg.CustomLbPolicy). The maximum length is 256 characters.
                #
                # Do not specify the same custom policy more than once for a
                # backend. If you do, the configuration is rejected.
                #
                # For an example of how to use this field, seeUse
                # a custom policy.
          },
          "policy": { # The configuration for a built-in load balancing policy.
            "name": "A String", # The name of a locality load-balancing policy. Valid values include
                # ROUND_ROBIN and, for Java clients, LEAST_REQUEST. For information
                # about these values, see the description of localityLbPolicy.
                #
                # Do not specify the same policy more than once for a
                # backend. If you do, the configuration is rejected.
          },
        },
      ],
      "localityLbPolicy": "A String", # The load balancing algorithm used within the scope of the locality. The
          # possible values are:
          #
          #    - ROUND_ROBIN: This is a simple policy in which each healthy
          #    backend is selected in round robin order. This is the default.
          #    - LEAST_REQUEST: An O(1) algorithm which
          #    selects two random healthy hosts and picks the host which has fewer active
          #    requests.
          #    - RING_HASH: The ring/modulo hash load balancer implements
          #    consistent hashing to backends. The algorithm has the property that the
          #    addition/removal of a host from a set of N hosts only affects 1/N of the
          #    requests.
          #    - RANDOM: The load balancer selects a random healthy
          #    host.
          #    - ORIGINAL_DESTINATION: Backend host is selected
          #    based on the client connection metadata, i.e., connections are opened to
          #    the same address as the destination address of the incoming connection
          #    before the connection was redirected to the load balancer.
          #    - MAGLEV: used as a drop in replacement for the ring hash
          #    load balancer. Maglev is not as stable as ring hash but has faster table
          #    lookup build times and host selection times. For more information about
          #    Maglev, see Maglev:
          #    A Fast and Reliable Software Network Load Balancer.
          #    - WEIGHTED_ROUND_ROBIN: Per-endpoint Weighted Round Robin
          #    Load Balancing using weights computed from Backend reported Custom Metrics.
          #    If set, the Backend Service responses are expected to contain non-standard
          #    HTTP response header field Endpoint-Load-Metrics. The reported
          #    metrics to use for computing the weights are specified via thecustomMetrics field.
          #
          #    This field is applicable to either:
          #       - A regional backend service with the service protocol set to HTTP,
          #       HTTPS, HTTP2 or H2C, and load_balancing_scheme set to
          #       INTERNAL_MANAGED.
          #       - A global backend service with the
          #       load_balancing_scheme set to INTERNAL_SELF_MANAGED, INTERNAL_MANAGED, or
          #       EXTERNAL_MANAGED.
          #
          #
          #    If sessionAffinity is not configured—that is, if session
          #    affinity remains at the default value of NONE—then the
          #    default value for localityLbPolicy
          #    is ROUND_ROBIN. If session affinity is set to a value other
          #    than NONE,
          #    then the default value for localityLbPolicy isMAGLEV.
          #
          #    Only ROUND_ROBIN and RING_HASH are supported
          #    when the backend service is referenced by a URL map that is bound to
          #    target gRPC proxy that has validateForProxyless field set to true.
          #
          #    localityLbPolicy cannot be specified with haPolicy.
      "logConfig": { # The available logging options for the load balancer traffic served by this # This field denotes the logging options for the load balancer traffic served
          # by this backend service. If logging is enabled, logs will be exported to
          # Stackdriver.
          # backend service.
        "enable": True or False, # Denotes whether to enable logging for the load balancer
            # traffic served by this backend service. The default value is false.
        "optionalFields": [ # This field can only be specified if logging is enabled for this backend
            # service and "logConfig.optionalMode" was set to CUSTOM. Contains a list
            # of optional fields you want to include in the logs. For example:
            # serverInstance, serverGkeDetails.cluster,
            # serverGkeDetails.pod.podNamespace
          "A String",
        ],
        "optionalMode": "A String", # This field can only be specified if logging is enabled for this backend
            # service. Configures whether all, none or a subset of optional fields
            # should be added to the reported logs. One of [INCLUDE_ALL_OPTIONAL,
            # EXCLUDE_ALL_OPTIONAL, CUSTOM]. Default is EXCLUDE_ALL_OPTIONAL.
        "sampleRate": 3.14, # This field can only be specified if logging is enabled for this backend
            # service. The value of the field must be in [0, 1]. This configures the
            # sampling rate of requests to the load balancer where 1.0 means all logged
            # requests are reported and 0.0 means no logged requests are reported. The
            # default value is 1.0.
      },
      "maxStreamDuration": { # A Duration represents a fixed-length span of time represented # Specifies the default maximum duration (timeout) for streams to this
          # service. Duration is computed from the beginning of the stream until the
          # response has been completely processed, including all retries. A stream
          # that does not complete in this duration is closed.
          #
          # If not specified, there will be no timeout limit, i.e. the maximum
          # duration is infinite.
          #
          # This value can be overridden in the PathMatcher configuration of the
          # UrlMap that references this backend service.
          #
          # This field is only allowed when the loadBalancingScheme of
          # the backend service is INTERNAL_SELF_MANAGED.
          # as a count of seconds and fractions of seconds at nanosecond
          # resolution. It is independent of any calendar and concepts like "day"
          # or "month". Range is approximately 10,000 years.
        "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
            # Durations less than one second are represented with a 0
            # `seconds` field and a positive `nanos` field. Must be from 0
            # to 999,999,999 inclusive.
        "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
            # to 315,576,000,000 inclusive. Note: these bounds are computed from:
            # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
      },
      "metadatas": { # Deployment metadata associated with the resource to be set by a GKE hub
          # controller and read by the backend RCTH
        "a_key": "A String",
      },
      "name": "A String", # Name of the resource. Provided by the client when the resource is created.
          # The name must be 1-63 characters long, and comply withRFC1035.
          # Specifically, the name must be 1-63 characters long and match the regular
          # expression `[a-z]([-a-z0-9]*[a-z0-9])?` which means the first
          # character must be a lowercase letter, and all following characters must
          # be a dash, lowercase letter, or digit, except the last character, which
          # cannot be a dash.
      "network": "A String", # The URL of the network to which this backend service belongs.
          #
          # This field must be set for Internal Passthrough Network Load Balancers when
          # the haPolicy is enabled, and for External Passthrough Network Load
          # Balancers when the haPolicy fastIpMove is enabled.
          #
          # This field can only be specified when the load balancing scheme is set toINTERNAL, or when the load balancing scheme is set toEXTERNAL and haPolicy fastIpMove is enabled.
      "networkPassThroughLbTrafficPolicy": { # Configures traffic steering properties of internal passthrough Network
          # Load Balancers.
          #
          # networkPassThroughLbTrafficPolicy cannot be specified with haPolicy.
        "zonalAffinity": { # When configured, new connections are load balanced across healthy backend
            # endpoints in the local zone.
          "spillover": "A String", # This field indicates whether zonal affinity is enabled or not. The
              # possible values are:
              #
              #    - ZONAL_AFFINITY_DISABLED: Default Value. Zonal Affinity
              #    is disabled. The load balancer distributes new connections to all
              #    healthy backend endpoints across all zones.
              #    - ZONAL_AFFINITY_STAY_WITHIN_ZONE: Zonal Affinity is
              #    enabled. The load balancer distributes new connections to all healthy
              #    backend endpoints in the local zone only. If there are no healthy
              #    backend endpoints in the local zone, the load balancer distributes
              #    new connections to all backend endpoints in the local zone.
              #    - ZONAL_AFFINITY_SPILL_CROSS_ZONE: Zonal Affinity is
              #    enabled. The load balancer distributes new connections to all healthy
              #    backend endpoints in the local zone only. If there aren't enough
              #    healthy backend endpoints in the local zone, the load balancer
              #    distributes new connections to all healthy backend endpoints across all
              #    zones.
          "spilloverRatio": 3.14, # The value of the field must be in [0, 1]. When the ratio of the count
              # of healthy backend endpoints in a zone to the count of backend
              # endpoints in that same zone is equal to or above this threshold, the
              # load balancer distributes new connections to all healthy endpoints in
              # the local zone only. When the ratio of the count of healthy backend
              # endpoints in a zone to the count of backend endpoints in that same
              # zone is below this threshold, the load balancer distributes all new
              # connections to all healthy endpoints across all zones.
        },
      },
      "orchestrationInfo": { # A message containing information about the resource or system that manages # Information about the resource or system that manages the backend service.
          # the backend service.
        "resourceUri": "A String", # The resource URI of the resource or system that manages the backend
            # service.
      },
      "outlierDetection": { # Settings controlling the eviction of unhealthy hosts from the load balancing # Settings controlling the ejection of unhealthy backend endpoints from the
          # load balancing pool of each individual proxy instance that processes the
          # traffic for the given backend service. If not set, this feature is
          # considered disabled.
          #
          # Results of the outlier detection algorithm (ejection of endpoints from the
          # load balancing pool and returning them back to the pool) are executed
          # independently by each proxy instance of the load balancer. In most cases,
          # more than one proxy instance handles the traffic received by a backend
          # service. Thus, it is possible that an unhealthy endpoint is detected and
          # ejected by only some of the proxies, and while this happens, other proxies
          # may continue to send requests to the same unhealthy endpoint until they
          # detect and eject the unhealthy endpoint.
          #
          # Applicable backend endpoints can be:
          #
          #    - VM instances in an Instance Group
          #    - Endpoints in a Zonal NEG (GCE_VM_IP, GCE_VM_IP_PORT)
          #    - Endpoints in a Hybrid Connectivity NEG (NON_GCP_PRIVATE_IP_PORT)
          #    - Serverless NEGs, that resolve to Cloud Run, App Engine, or Cloud
          #    Functions Services
          #    - Private Service Connect NEGs, that resolve to
          #    Google-managed regional API endpoints or managed services published using
          #    Private Service Connect
          #
          #
          #
          # Applicable backend service types can be:
          #
          #    - A global backend service with the loadBalancingScheme set to
          #    INTERNAL_SELF_MANAGED or EXTERNAL_MANAGED.
          #    - A regional backend
          #    service with the service protocol set to HTTP, HTTPS, HTTP2 or H2C, and
          #    loadBalancingScheme set to INTERNAL_MANAGED or EXTERNAL_MANAGED. Not
          #    supported for Serverless NEGs.
          #
          #
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
          # pool for the backend service.
        "baseEjectionTime": { # A Duration represents a fixed-length span of time represented # The base time that a backend endpoint is ejected for. Defaults to 30000ms
            # or 30s.
            #
            # After a backend endpoint is returned back to the load balancing pool, it
            # can be ejected again in another ejection analysis. Thus, the total ejection
            # time is equal to the base ejection time multiplied by the number of times
            # the backend endpoint has been ejected. Defaults to 30000ms or 30s.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "consecutiveErrors": 42, # Number of consecutive errors before a backend endpoint is ejected from the
            # load balancing pool. When the backend endpoint is accessed over HTTP, a 5xx
            # return code qualifies as an error. Defaults to 5.
        "consecutiveGatewayFailure": 42, # The number of consecutive gateway failures (502, 503, 504 status or
            # connection errors that are mapped to one of those status codes) before a
            # consecutive gateway failure ejection occurs. Defaults to 3.
        "enforcingConsecutiveErrors": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through consecutive 5xx. This setting can be
            # used to disable ejection or to ramp it up slowly. Defaults to 0.
        "enforcingConsecutiveGatewayFailure": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through consecutive gateway failures. This
            # setting can be used to disable ejection or to ramp it up slowly. Defaults
            # to 100.
        "enforcingSuccessRate": 42, # The percentage chance that a backend endpoint will be ejected when an
            # outlier status is detected through success rate statistics. This setting
            # can be used to disable ejection or to ramp it up slowly. Defaults to 100.
            #
            # Not supported when the backend service uses Serverless NEG.
        "interval": { # A Duration represents a fixed-length span of time represented # Time interval between ejection analysis sweeps. This can result in both new
            # ejections and backend endpoints being returned to service. The interval is
            # equal to the number of seconds as defined in
            # outlierDetection.interval.seconds plus the number of nanoseconds as defined
            # in outlierDetection.interval.nanos. Defaults to 1 second.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
        "maxEjectionPercent": 42, # Maximum percentage of backend endpoints in the load balancing pool for the
            # backend service that can be ejected if the ejection conditions are met.
            # Defaults to 50%.
        "successRateMinimumHosts": 42, # The number of backend endpoints in the load balancing pool that must have
            # enough request volume to detect success rate outliers. If the number of
            # backend endpoints is fewer than this setting, outlier detection via success
            # rate statistics is not performed for any backend endpoint in the load
            # balancing pool. Defaults to 5.
            #
            # Not supported when the backend service uses Serverless NEG.
        "successRateRequestVolume": 42, # The minimum number of total requests that must be collected in one interval
            # (as defined by the interval duration above) to include this backend
            # endpoint in success rate based outlier detection. If the volume is lower
            # than this setting, outlier detection via success rate statistics is not
            # performed for that backend endpoint. Defaults to 100.
            #
            # Not supported when the backend service uses Serverless NEG.
        "successRateStdevFactor": 42, # This factor is used to determine the ejection threshold for success rate
            # outlier ejection. The ejection threshold is the difference between the mean
            # success rate, and the product of this factor and the standard deviation of
            # the mean success rate: mean - (stdev * successRateStdevFactor). This factor
            # is divided by a thousand to get a double. That is, if the desired factor
            # is 1.9, the runtime value should be 1900. Defaults to 1900.
            #
            # Not supported when the backend service uses Serverless NEG.
      },
      "params": { # Additional Backend Service parameters. # Input only. [Input Only] Additional params passed with the request, but not persisted
          # as part of resource payload.
        "resourceManagerTags": { # Tag keys/values directly bound to this resource.
            # Tag keys and values have the same definition as resource
            # manager tags. The field is allowed for INSERT
            # only. The keys/values to set on the resource should be specified in
            # either ID { : } or Namespaced format
            # { : }.
            # For example the following are valid inputs:
            # * {"tagKeys/333" : "tagValues/444", "tagKeys/123" : "tagValues/456"}
            # * {"123/environment" : "production", "345/abc" : "xyz"}
            # Note:
            # * Invalid combinations of ID & namespaced format is not supported. For
            #   instance: {"123/environment" : "tagValues/444"} is invalid.
          "a_key": "A String",
        },
      },
      "port": 42, # Deprecated in favor of portName. The TCP port to connect on
          # the backend. The default value is 80.
          # For internal passthrough Network Load Balancers and external passthrough
          # Network Load Balancers, omit port.
      "portName": "A String", # A named port on a backend instance group representing the port for
          # communication to the backend VMs in that group. The
          # named port must be [defined on each backend instance
          # group](https://cloud.google.com/load-balancing/docs/backend-service#named_ports).
          # This parameter has no meaning if the backends are NEGs. For internal
          # passthrough Network Load Balancers and external passthrough Network Load
          # Balancers, omit port_name.
      "protocol": "A String", # The protocol this BackendService uses to communicate
          # with backends.
          #
          # Possible values are HTTP, HTTPS, HTTP2, H2C, TCP, SSL, UDP or GRPC.
          # depending on the chosen load balancer or Traffic Director configuration.
          # Refer to the documentation for the load balancers or for Traffic Director
          # for more information.
          #
          # Must be set to GRPC when the backend service is referenced by a URL map
          # that is bound to target gRPC proxy.
      "region": "A String", # Output only. [Output Only] URL of the region where the regional backend service
          # resides. This field is not applicable to global backend services.
          # You must specify this field as part of the HTTP request URL. It is
          # not settable as a field in the request body.
      "securityPolicy": "A String", # [Output Only] The resource URL for the security policy associated with this
          # backend service.
      "securitySettings": { # The authentication and authorization settings for a BackendService. # This field specifies the security settings that apply to this backend
          # service. This field is applicable to a global backend service with the
          # load_balancing_scheme set to INTERNAL_SELF_MANAGED.
        "authentication": "A String", # [Deprecated] Use clientTlsPolicy instead.
        "awsV4Authentication": { # Contains the configurations necessary to generate a signature for access to # The configuration needed to generate a signature for access to private
            # storage buckets that support AWS's Signature Version 4 for authentication.
            # Allowed only for INTERNET_IP_PORT and INTERNET_FQDN_PORT NEG backends.
            # private storage buckets that support Signature Version 4 for authentication.
            # The service name for generating the authentication header will always default
            # to 's3'.
          "accessKey": "A String", # The access key used for s3 bucket authentication. Required for updating or
              # creating a backend that uses AWS v4 signature authentication, but will not
              # be returned as part of the configuration when queried with a REST API GET
              # request.
              #
              # @InputOnly
          "accessKeyId": "A String", # The identifier of an access key used for s3 bucket authentication.
          "accessKeyVersion": "A String", # The optional version identifier for the access key. You can use this to
              # keep track of different iterations of your access key.
          "originRegion": "A String", # The name of the cloud region of your origin. This is a free-form field with
              # the name of the region your cloud uses to host your origin.  For example,
              # "us-east-1" for AWS or "us-ashburn-1" for OCI.
        },
        "clientTlsPolicy": "A String", # Optional. A URL referring to a networksecurity.ClientTlsPolicy resource
            # that describes how clients should authenticate with this service's
            # backends.
            #
            #  clientTlsPolicy only applies to a globalBackendService with the loadBalancingScheme set
            # to INTERNAL_SELF_MANAGED.
            #
            #  If left blank, communications are not encrypted.
        "subjectAltNames": [ # Optional. A list of Subject Alternative Names (SANs) that the client
            # verifies during a mutual TLS handshake with an server/endpoint for thisBackendService. When the server presents its X.509 certificate
            # to the client, the client inspects the certificate'ssubjectAltName field. If the field contains one of the
            # specified values, the communication continues. Otherwise, it fails. This
            # additional check enables the client to verify that the server is authorized
            # to run the requested service.
            #
            #  Note that the contents of the server
            # certificate's subjectAltName field are configured by the
            # Public Key Infrastructure which provisions server identities.
            #
            #  Only applies to a global BackendService withloadBalancingScheme set to INTERNAL_SELF_MANAGED.
            # Only applies when BackendService has an attachedclientTlsPolicy with clientCertificate (mTLS
            # mode).
          "A String",
        ],
      },
      "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
      "serviceBindings": [ # URLs of networkservices.ServiceBinding resources.
          #
          # Can only be set if load balancing scheme is INTERNAL_SELF_MANAGED.
          # If set, lists of backends and health checks must be both empty.
        "A String",
      ],
      "serviceLbPolicy": "A String", # URL to networkservices.ServiceLbPolicy resource.
          #
          # Can only be set if load balancing scheme is EXTERNAL_MANAGED,
          # INTERNAL_MANAGED or INTERNAL_SELF_MANAGED and the scope is global.
      "sessionAffinity": "A String", # Type of session affinity to use. The default is NONE.
          #
          # Only NONE and HEADER_FIELD are supported
          # when the backend service is referenced by a URL map that is bound to
          # target gRPC proxy that has validateForProxyless field set to true.
          #
          # For more details, see:
          # [Session
          # Affinity](https://cloud.google.com/load-balancing/docs/backend-service#session_affinity).
          #
          # sessionAffinity cannot be specified with haPolicy.
      "strongSessionAffinityCookie": { # The HTTP cookie used for stateful session affinity. # Describes the HTTP cookie used for stateful session affinity. This field is
          # applicable and required if the sessionAffinity is set toSTRONG_COOKIE_AFFINITY.
        "name": "A String", # Name of the cookie.
        "path": "A String", # Path to set for the cookie.
        "ttl": { # A Duration represents a fixed-length span of time represented # Lifetime of the cookie.
            # as a count of seconds and fractions of seconds at nanosecond
            # resolution. It is independent of any calendar and concepts like "day"
            # or "month". Range is approximately 10,000 years.
          "nanos": 42, # Span of time that's a fraction of a second at nanosecond resolution.
              # Durations less than one second are represented with a 0
              # `seconds` field and a positive `nanos` field. Must be from 0
              # to 999,999,999 inclusive.
          "seconds": "A String", # Span of time at a resolution of a second. Must be from 0
              # to 315,576,000,000 inclusive. Note: these bounds are computed from:
              # 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        },
      },
      "subsetting": { # Subsetting configuration for this BackendService. # subsetting cannot be specified with haPolicy.
          # Currently this is applicable only for Internal TCP/UDP load balancing,
          # Internal HTTP(S) load balancing and Traffic Director.
        "policy": "A String",
        "subsetSize": 42, # The number of backends per backend group assigned to each proxy instance or
            # each service mesh client.
            #
            # An input parameter to the `CONSISTENT_HASH_SUBSETTING` algorithm.
            # Can only be set if `policy` is set to `CONSISTENT_HASH_SUBSETTING`.
            # Can only be set if load balancing scheme is `INTERNAL_MANAGED` or
            # `INTERNAL_SELF_MANAGED`.
            #
            # `subset_size` is optional for Internal HTTP(S) load balancing
            # and required for Traffic Director.
            #
            # If you do not provide this value, Cloud Load Balancing will calculate it
            # dynamically to optimize the number of proxies/clients visible to each
            # backend and vice versa.
            #
            # Must be greater than 0. If `subset_size` is larger than the number of
            # backends/endpoints, then subsetting is disabled.
      },
      "timeoutSec": 42, # The backend service timeout has a different meaning depending on the
          # type of load balancer. For more information see,
          # Backend service settings.
          # The default is 30 seconds.
          # The full range of timeout values allowed goes from 1
          # through 2,147,483,647 seconds.
          #
          # This value can be overridden in the PathMatcher configuration of the
          # UrlMap that references this backend service.
          #
          # Not supported when the backend service is referenced by a URL map that is
          # bound to target gRPC proxy that has validateForProxyless field set to true.
          # Instead, use maxStreamDuration.
      "tlsSettings": { # Configuration for Backend Authenticated TLS and mTLS. May only be specified
          # when the backend protocol is SSL, HTTPS or HTTP2.
        "authenticationConfig": "A String", # Reference to the BackendAuthenticationConfig resource from the
            # networksecurity.googleapis.com namespace. Can be used in authenticating
            # TLS connections to the backend, as specified by the authenticationMode
            # field. Can only be specified if authenticationMode is not NONE.
        "identity": "A String", # Assigns the Managed Identity for the BackendService Workload.
            #
            #
            # Use this property to configure the load balancer back-end to use
            # certificates and roots of trust provisioned by the Managed Workload
            # Identity system.
            #
            #  The `identity` property is the
            # fully-specified SPIFFE ID to use in the SVID presented by the Load
            # Balancer Workload.
            #
            #  The SPIFFE ID must be a resource starting with the
            # `trustDomain` property value, followed by the path to the Managed
            # Workload Identity.
            #
            #  Supported SPIFFE ID format:
            #
            #    - //<trust_domain>/ns/<namespace>/sa/<subject>
            #
            #
            # The Trust Domain within the Managed Identity must refer to a valid
            # Workload Identity Pool. The TrustConfig and CertificateIssuanceConfig
            # will be inherited from the Workload Identity Pool.
            #
            #  Restrictions:
            #
            #    - If you set the `identity` property, you cannot manually set
            #    the following fields:
            #        - tlsSettings.sni
            #       - tlsSettings.subjectAltNames
            #       - tlsSettings.authenticationConfig
            #
            #
            # When defining a `identity` for a RegionBackendServices, the
            # corresponding Workload Identity Pool must have a ca_pool
            # configured in the same region.
            #
            #  The system will set up a read-onlytlsSettings.authenticationConfig for the Managed Identity.
        "sni": "A String", # Server Name Indication - see RFC3546 section 3.1. If set, the load
            # balancer sends this string as the SNI hostname in the TLS connection to
            # the backend, and requires that this string match a Subject Alternative
            # Name (SAN) in the backend's server certificate. With a Regional Internet
            # NEG backend, if the SNI is specified here, the load balancer uses it
            # regardless of whether the Regional Internet NEG is specified with FQDN or
            # IP address and port. When both sni and subjectAltNames[] are specified,
            # the load balancer matches the backend certificate's SAN only to
            # subjectAltNames[].
        "subjectAltNames": [ # A list of Subject Alternative Names (SANs) that the Load Balancer
            # verifies during a TLS handshake with the backend. When the server
            # presents its X.509 certificate to the Load Balancer, the Load Balancer
            # inspects the certificate's SAN field, and requires that at least one SAN
            # match one of the subjectAltNames in the list. This field is limited to 5
            # entries. When both sni and subjectAltNames[] are specified, the load
            # balancer matches the backend certificate's SAN only to subjectAltNames[].
          { # A Subject Alternative Name that the load balancer matches against the SAN
              # field in the TLS certificate provided by the backend, specified as either
              # a DNS name or a URI, in accordance with RFC 5280 4.2.1.6
            "dnsName": "A String", # The SAN specified as a DNS Name.
            "uniformResourceIdentifier": "A String", # The SAN specified as a URI.
          },
        ],
      },
      "usedBy": [ # Output only. [Output Only] List of resources referencing given backend service.
        {
          "reference": "A String", # Output only. [Output Only] Server-defined URL for resources referencing given
              # BackendService like UrlMaps, TargetTcpProxies, TargetSslProxies
              # and ForwardingRule.
        },
      ],
    }

      requestId: string, An optional request ID to identify requests. Specify a unique request ID so
    that if you must retry your request, the server will know to ignore the
    request if it has already been completed.

    For example, consider a situation where you make an initial request and
    the request times out. If you make the request again with the same
    request ID, the server can check if original operation with the same
    request ID was received, and if so, will ignore the second request. This
    prevents clients from accidentally creating duplicate commitments.

    The request ID must be
    a valid UUID with the exception that zero UUID is not supported
    (00000000-0000-0000-0000-000000000000).
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Represents an Operation resource.
        #
        # Google Compute Engine has three Operation resources:
        #
        # * [Global](/compute/docs/reference/rest/beta/globalOperations)
        # * [Regional](/compute/docs/reference/rest/beta/regionOperations)
        # * [Zonal](/compute/docs/reference/rest/beta/zoneOperations)
        #
        # You can use an operation resource to manage asynchronous API requests.
        # For more information, readHandling
        # API responses.
        #
        # Operations can be global, regional or zonal.
        #
        #    - For global operations, use the `globalOperations`
        #    resource.
        #    - For regional operations, use the
        #    `regionOperations` resource.
        #    - For zonal operations, use
        #    the `zoneOperations` resource.
        #
        #
        #
        # For more information, read
        # Global, Regional, and Zonal Resources.
        #
        # Note that completed Operation resources have a limited
        # retention period.
      "clientOperationId": "A String", # [Output Only] The value of `requestId` if you provided it in the request.
          # Not present otherwise.
      "creationTimestamp": "A String", # [Deprecated] This field is deprecated.
      "description": "A String", # [Output Only] A textual description of the operation, which is
          # set when the operation is created.
      "endTime": "A String", # [Output Only] The time that this operation was completed. This value is inRFC3339
          # text format.
      "error": { # [Output Only] If errors are generated during processing of the operation,
          # this field will be populated.
        "errors": [ # [Output Only] The array of errors encountered while processing this
            # operation.
          {
            "code": "A String", # [Output Only] The error type identifier for this error.
            "errorDetails": [ # [Output Only] An optional list of messages that contain the error
                # details. There is a set of defined message types to use for providing
                # details.The syntax depends on the error code. For example,
                # QuotaExceededInfo will have details when the error code is
                # QUOTA_EXCEEDED.
              {
                "errorInfo": { # Describes the cause of the error with structured details.
                    #
                    # Example of an error when contacting the "pubsub.googleapis.com" API when it
                    # is not enabled:
                    #
                    #     { "reason": "API_DISABLED"
                    #       "domain": "googleapis.com"
                    #       "metadata": {
                    #         "resource": "projects/123",
                    #         "service": "pubsub.googleapis.com"
                    #       }
                    #     }
                    #
                    # This response indicates that the pubsub.googleapis.com API is not enabled.
                    #
                    # Example of an error that is returned when attempting to create a Spanner
                    # instance in a region that is out of stock:
                    #
                    #     { "reason": "STOCKOUT"
                    #       "domain": "spanner.googleapis.com",
                    #       "metadata": {
                    #         "availableRegions": "us-central1,us-east2"
                    #       }
                    #     }
                  "domain": "A String", # The logical grouping to which the "reason" belongs. The error domain
                      # is typically the registered service name of the tool or product that
                      # generates the error. Example: "pubsub.googleapis.com". If the error is
                      # generated by some common infrastructure, the error domain must be a
                      # globally unique value that identifies the infrastructure. For Google API
                      # infrastructure, the error domain is "googleapis.com".
                  "metadatas": { # Additional structured details about this error.
                      #
                      # Keys must match a regular expression of `a-z+` but should
                      # ideally be lowerCamelCase. Also, they must be limited to 64 characters in
                      # length. When identifying the current value of an exceeded limit, the units
                      # should be contained in the key, not the value.  For example, rather than
                      # `{"instanceLimit": "100/request"}`, should be returned as,
                      # `{"instanceLimitPerRequest": "100"}`, if the client exceeds the number of
                      # instances that can be created in a single (batch) request.
                    "a_key": "A String",
                  },
                  "reason": "A String", # The reason of the error. This is a constant value that identifies the
                      # proximate cause of the error. Error reasons are unique within a particular
                      # domain of errors. This should be at most 63 characters and match a
                      # regular expression of `A-Z+[A-Z0-9]`, which represents
                      # UPPER_SNAKE_CASE.
                },
                "help": { # Provides links to documentation or for performing an out of band action.
                    #
                    # For example, if a quota check failed with an error indicating the calling
                    # project hasn't enabled the accessed service, this can contain a URL pointing
                    # directly to the right place in the developer console to flip the bit.
                  "links": [ # URL(s) pointing to additional information on handling the current error.
                    { # Describes a URL link.
                      "description": "A String", # Describes what the link offers.
                      "url": "A String", # The URL of the link.
                    },
                  ],
                },
                "localizedMessage": { # Provides a localized error message that is safe to return to the user
                    # which can be attached to an RPC error.
                  "locale": "A String", # The locale used following the specification defined at
                      # https://www.rfc-editor.org/rfc/bcp/bcp47.txt.
                      # Examples are: "en-US", "fr-CH", "es-MX"
                  "message": "A String", # The localized error message in the above locale.
                },
                "quotaInfo": { # Additional details for quota exceeded error for resource quota.
                  "dimensions": { # The map holding related quota dimensions.
                    "a_key": "A String",
                  },
                  "futureLimit": 3.14, # Future quota limit being rolled out. The limit's unit depends on the quota
                      #  type or metric.
                  "limit": 3.14, # Current effective quota limit. The limit's unit depends on the quota type
                      # or metric.
                  "limitName": "A String", # The name of the quota limit.
                  "metricName": "A String", # The Compute Engine quota metric name.
                  "rolloutStatus": "A String", # Rollout status of the future quota limit.
                },
              },
            ],
            "location": "A String", # [Output Only] Indicates the field in the request that caused the error.
                # This property is optional.
            "message": "A String", # [Output Only] An optional, human-readable error message.
          },
        ],
      },
      "getVersionOperationMetadata": {
        "inlineSbomInfo": {
          "currentComponentVersions": { # SBOM versions currently applied to the resource. The key is the component
              # name and the value is the version.
            "a_key": "A String",
          },
          "targetComponentVersions": { # SBOM versions scheduled for the next maintenance. The key is the
              # component name and the value is the version.
            "a_key": "A String",
          },
        },
      },
      "httpErrorMessage": "A String", # [Output Only] If the operation fails, this field contains the HTTP error
          # message that was returned, such as `NOT FOUND`.
      "httpErrorStatusCode": 42, # [Output Only] If the operation fails, this field contains the HTTP error
          # status code that was returned. For example, a `404` means the
          # resource was not found.
      "id": "A String", # [Output Only] The unique identifier for the operation. This identifier is
          # defined by the server.
      "insertTime": "A String", # [Output Only] The time that this operation was requested.
          # This value is inRFC3339
          # text format.
      "instancesBulkInsertOperationMetadata": {
        "perLocationStatus": { # Status information per location (location name is key).
            # Example key: zones/us-central1-a
          "a_key": {
            "createdVmCount": 42, # [Output Only] Count of VMs successfully created so far.
            "deletedVmCount": 42, # [Output Only] Count of VMs that got deleted during rollback.
            "failedToCreateVmCount": 42, # [Output Only] Count of VMs that started creating but encountered an
                # error.
            "status": "A String", # [Output Only] Creation status of BulkInsert operation - information
                # if the flow is rolling forward or rolling back.
            "targetVmCount": 42, # [Output Only] Count of VMs originally planned to be created.
          },
        },
      },
      "kind": "compute#operation", # Output only. [Output Only] Type of the resource. Always `compute#operation` for
          # Operation resources.
      "name": "A String", # [Output Only] Name of the operation.
      "operationGroupId": "A String", # Output only. [Output Only] An ID that represents a group of operations, such as when a
          # group of operations results from a `bulkInsert` API request.
      "operationType": "A String", # [Output Only] The type of operation, such as `insert`,
          # `update`, or `delete`, and so on.
      "progress": 42, # [Output Only] An optional progress indicator that ranges from 0 to 100.
          # There is no requirement that this be linear or support any granularity of
          # operations. This should not be used to guess when the operation will be
          # complete. This number should monotonically increase as the operation
          # progresses.
      "region": "A String", # [Output Only] The URL of the region where the operation resides. Only
          # applicable when performing regional operations.
      "selfLink": "A String", # [Output Only] Server-defined URL for the resource.
      "setCommonInstanceMetadataOperationMetadata": { # Output only. [Output Only] If the operation is for projects.setCommonInstanceMetadata,
          # this field will contain information on all underlying zonal actions and
          # their state.
        "clientOperationId": "A String", # [Output Only] The client operation id.
        "perLocationOperations": { # [Output Only] Status information per location (location name is key).
            # Example key: zones/us-central1-a
          "a_key": {
            "error": { # The `Status` type defines a logical error model that is suitable for # [Output Only] If state is `ABANDONED` or `FAILED`, this field is
                # populated.
                # different programming environments, including REST APIs and RPC APIs. It is
                # used by [gRPC](https://github.com/grpc). Each `Status` message contains
                # three pieces of data: error code, error message, and error details.
                #
                # You can find out more about this error model and how to work with it in the
                # [API Design Guide](https://cloud.google.com/apis/design/errors).
              "code": 42, # The status code, which should be an enum value of google.rpc.Code.
              "details": [ # A list of messages that carry the error details.  There is a common set of
                  # message types for APIs to use.
                {
                  "a_key": "", # Properties of the object. Contains field @type with type URL.
                },
              ],
              "message": "A String", # A developer-facing error message, which should be in English. Any
                  # user-facing error message should be localized and sent in the
                  # google.rpc.Status.details field, or localized by the client.
            },
            "state": "A String", # [Output Only] Status of the action, which can be one of the following:
                # `PROPAGATING`, `PROPAGATED`, `ABANDONED`, `FAILED`, or `DONE`.
          },
        },
      },
      "startTime": "A String", # [Output Only] The time that this operation was started by the server.
          # This value is inRFC3339
          # text format.
      "status": "A String", # [Output Only] The status of the operation, which can be one of the
          # following:
          # `PENDING`, `RUNNING`, or `DONE`.
      "statusMessage": "A String", # [Output Only] An optional textual description of the current status of the
          # operation.
      "targetId": "A String", # [Output Only] The unique target ID, which identifies a specific incarnation
          # of the target resource.
      "targetLink": "A String", # [Output Only] The URL of the resource that the operation modifies. For
          # operations related to creating a snapshot, this points to the disk
          # that the snapshot was created from.
      "user": "A String", # [Output Only] User who requested the operation, for example:
          # `user@example.com` or
          # `alice_smith_identifier (global/workforcePools/example-com-us-employees)`.
      "warnings": [ # [Output Only] If warning messages are generated during processing of the
          # operation, this field will be populated.
        {
          "code": "A String", # [Output Only] A warning code, if applicable. For example, Compute
              # Engine returns NO_RESULTS_ON_PAGE if there
              # are no results in the response.
          "data": [ # [Output Only] Metadata about this warning in key:
              # value format. For example:
              #
              # "data": [
              #   {
              #    "key": "scope",
              #    "value": "zones/us-east1-d"
              #   }
            {
              "key": "A String", # [Output Only] A key that provides more detail on the warning being
                  # returned. For example, for warnings where there are no results in a list
                  # request for a particular zone, this key might be scope and
                  # the key value might be the zone name. Other examples might be a key
                  # indicating a deprecated resource and a suggested replacement, or a
                  # warning about invalid network settings (for example, if an instance
                  # attempts to perform IP forwarding but is not enabled for IP forwarding).
              "value": "A String", # [Output Only] A warning data value corresponding to the key.
            },
          ],
          "message": "A String", # [Output Only] A human-readable description of the warning code.
        },
      ],
      "zone": "A String", # [Output Only] The URL of the zone where the operation resides. Only
          # applicable when performing per-zone operations.
    }