libvirt: virtproxyd
Description: libvirt, virtualization, virtualization API

# virtproxyd

libvirt proxy daemon

Manual section:

  8

Manual group:

  Virtualization Support

## SYNOPSIS

virtproxyd [OPTION]...

## DESCRIPTION

The virtproxyd program is a server side daemon component of the libvirt virtualization management system.

It is one of a collection of modular daemons that replace functionality previously provided by the monolithic libvirtd daemon.

This daemon runs on virtualization hosts and

> - Listens on a UNIX socket to provide backwards compatibility for clients that previously connected to the libvirtd socket.

> - Optionally listens on TCP ports for connections from off-node clients

Upon receiving RPC messages from a client virtproxyd will transparently forward them on to the appropriate modular daemon, and similarly relay back any asynchronous events.

By default, the virtproxyd daemon listens for requests on a local Unix domain socket with the same path previously used by libvirtd. The configuration file can be used to instruct it to also listen on TCP socket(s). Systemd socket activation is also supported to allow it to receive pre-opened listener sockets on startup.

Since virtproxyd merely forwards RPC messages, it has no important state, and can be restarted at any time. Clients should expect to reconnect after the restart.

## SYSTEM SOCKET ACTIVATION

The virtproxyd daemon is capable of starting in two modes.

In the traditional mode, it will create and listen on UNIX sockets itself. It will also listen on TCP/IP socket(s), according to the listen_tcp and listen_tls options in /etc/libvirt/virtproxyd.conf

In socket activation mode, it will rely on systemd to create and listen on the UNIX, and optionally TCP/IP, sockets and pass them as pre-opened file descriptors. In this mode most of the socket related config options in /etc/libvirt/virtproxyd.conf will no longer have any effect. To enable TCP or TLS sockets use either

    $ systemctl start virtproxyd-tls.socket

Or

    $ systemctl start virtproxyd-tcp.socket

Socket activation mode is generally the default when running on a host OS that uses systemd. To revert to the traditional mode, all the socket unit files must be masked:

    $ systemctl mask virtproxyd.socket virtproxyd-ro.socket \
       virtproxyd-admin.socket virtproxyd-tls.socket virtproxyd-tcp.socket

## OPTIONS

-h, --help

Display command line help usage then exit.

-d, --daemon

Run as a daemon & write PID file.

-f, --config *FILE*

Use this configuration file, overriding the default value.

-p, --pid-file *FILE*

Use this name for the PID file, overriding the default value.

-t, --timeout *SECONDS*

Exit after timeout period (in seconds), provided there are neither any client connections nor any running domains.

-v, --verbose

Enable output of verbose messages.

--version

Display version information then exit.

## SIGNALS

On receipt of SIGHUP virtproxyd will reload its configuration.

## FILES

### When run as root

- /etc/libvirt/virtproxyd.conf

The default configuration file used by virtproxyd, unless overridden on the command line using the -f | --config option.

- /var/run/libvirt/libvirt-sock

- /var/run/libvirt/libvirt-sock-ro

The sockets virtproxyd will use.

- /etc/pki/CA/cacert.pem

The TLS Certificate Authority certificate virtproxyd will use.

- /etc/pki/libvirt/servercert.pem

The TLS Server certificate virtproxyd will use.

- /etc/pki/libvirt/private/serverkey.pem

The TLS Server private key virtproxyd will use.

- /var/run/virtproxyd.pid

The PID file to use, unless overridden by the -p | --pid-file option.

### When run as non-root

- $XDG_CONFIG_HOME/libvirt/virtproxyd.conf

The default configuration file used by virtproxyd, unless overridden on the command line using the -f``|--config`` option.

- $XDG_RUNTIME_DIR/libvirt/libvirt-sock

The socket virtproxyd will use.

- $HOME/.pki/libvirt/cacert.pem

The TLS Certificate Authority certificate virtproxyd will use.

- $HOME/.pki/libvirt/servercert.pem

The TLS Server certificate virtproxyd will use.

- $HOME/.pki/libvirt/serverkey.pem

The TLS Server private key virtproxyd will use.

- $XDG_RUNTIME_DIR/libvirt/virtproxyd.pid

The PID file to use, unless overridden by the -p``|--pid-file`` option.

If $XDG_CONFIG_HOME is not set in your environment, virtproxyd will use $HOME/.config

If $XDG_RUNTIME_DIR is not set in your environment, virtproxyd will use $HOME/.cache

## EXAMPLES

To retrieve the version of virtproxyd:

    # virtproxyd --version
    virtproxyd (libvirt) 8.7.0

To start virtproxyd, instructing it to daemonize and create a PID file:

    # virtproxyd -d
    # ls -la /var/run/virtproxyd.pid
    -rw-r--r-- 1 root root 6 Jul  9 02:40 /var/run/virtproxyd.pid

## BUGS

Please report all bugs you discover. This should be done via either:

1. the mailing list

   https://libvirt.org/contact.html

2. the bug tracker

   https://libvirt.org/bugs.html

Alternatively, you may report bugs to your software distributor / vendor.

## AUTHORS

Please refer to the AUTHORS file distributed with libvirt.

## COPYRIGHT

Copyright (C) 2006-2020 Red Hat, Inc., and the authors listed in the libvirt AUTHORS file.

## LICENSE

virtproxyd is distributed under the terms of the GNU LGPL v2.1+. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE

## SEE ALSO

virsh(1), libvirtd(8), https://www.libvirt.org/daemons.html,