Manpages - virtnodedevd.8

virtnodedevd - libvirt host device management daemon

virtnodedevd [/OPTION/]…

The virtnodedevd 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 to provide management for host devices.

The virtnodedevd daemon only listens for requests on a local Unix domain socket. Remote off-host access and backwards compatibility with legacy clients expecting libvirtd is provided by the virtproxy daemon.

Restarting virtnodedevd does not interrupt running guests. Guests continue to operate and changes in their state will generally be picked up automatically during startup. None the less it is recommended to avoid restarting with running guests whenever practical.

The virtnodedevd daemon is capable of starting in two modes.

In the traditional mode, it will create and listen on UNIX sockets itself.

In socket activation mode, it will rely on systemd to create and listen on the UNIX sockets and pass them as pre-opened file descriptors. In this mode most of the socket related config options in /etc/libvirt/virtnodedevd.conf will no longer have any effect.

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:

#+begin_quote

      $ systemctl mask virtnodedevd.socket virtnodedevd-ro.socket \
         virtnodedevd-admin.socket

#+end_quote

-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.

On receipt of SIGHUP virtnodedevd will reload its configuration.

To retrieve the version of virtnodedevd:

#+begin_quote

      # virtnodedevd --version
      virtnodedevd (libvirt) 7.10.0

#+end_quote

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

#+begin_quote

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

#+end_quote

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

1. the mailing list

https://libvirt.org/contact.html

1. the bug tracker

https://libvirt.org/bugs.html

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

Please refer to the AUTHORS file distributed with libvirt.

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

virtnodedevd 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

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