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Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Andrea Bolognani <abologna@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
214 lines
4.9 KiB
ReStructuredText
214 lines
4.9 KiB
ReStructuredText
============
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virtnodedevd
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============
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-------------------------------------
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libvirt host device management daemon
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-------------------------------------
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:Manual section: 8
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:Manual group: Virtualization Support
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.. contents::
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SYNOPSIS
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========
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``virtnodedevd`` [*OPTION*]...
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DESCRIPTION
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===========
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The ``virtnodedevd`` program is a server side daemon component of the libvirt
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virtualization management system.
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It is one of a collection of modular daemons that replace functionality
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previously provided by the monolithic ``libvirtd`` daemon.
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This daemon runs on virtualization hosts to provide management for host devices.
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The ``virtnodedevd`` daemon only listens for requests on a local Unix domain
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socket. Remote off-host access and backwards compatibility with legacy
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clients expecting ``libvirtd`` is provided by the ``virtproxy`` daemon.
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Restarting ``virtnodedevd`` does not interrupt running guests. Guests continue to
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operate and changes in their state will generally be picked up automatically
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during startup. None the less it is recommended to avoid restarting with
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running guests whenever practical.
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DAEMON STARTUP MODES
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====================
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The ``virtnodedevd`` daemon is capable of starting in two modes.
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Socket activation mode
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----------------------
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On hosts with systemd it is started in socket activation mode and it will rely
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on systemd to create and listen on the UNIX sockets and pass them as pre-opened
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file descriptors. In this mode most of the socket related config options in
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``/etc/libvirt/virtnodedevd.conf`` will no longer have any effect.
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Traditional service mode
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------------------------
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On hosts without systemd, it will create and listen on UNIX sockets itself.
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OPTIONS
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=======
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``-h``, ``--help``
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Display command line help usage then exit.
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``-d``, ``--daemon``
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Run as a daemon & write PID file.
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``-f``, ``--config *FILE*``
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Use this configuration file, overriding the default value.
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``-p``, ``--pid-file *FILE*``
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Use this name for the PID file, overriding the default value.
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``-t``, ``--timeout *SECONDS*``
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Exit after timeout period (in seconds), provided there are no client
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connections.
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``-v``, ``--verbose``
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Enable output of verbose messages.
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``--version``
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Display version information then exit.
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SIGNALS
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=======
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On receipt of ``SIGHUP`` ``virtnodedevd`` will reload its configuration.
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FILES
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=====
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When run as *root*
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------------------
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* ``@SYSCONFDIR@/libvirt/virtnodedevd.conf``
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The default configuration file used by ``virtnodedevd``, unless overridden on the
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command line using the ``-f`` | ``--config`` option.
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* ``@RUNSTATEDIR@/libvirt/virtnodedevd-sock``
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* ``@RUNSTATEDIR@/libvirt/virtnodedevd-sock-ro``
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* ``@RUNSTATEDIR@/libvirt/virtnodedevd-admin-sock``
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The sockets ``virtnodedevd`` will use.
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The TLS **Server** private key ``virtnodedevd`` will use.
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* ``@RUNSTATEDIR@/virtnodedevd.pid``
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The PID file to use, unless overridden by the ``-p`` | ``--pid-file`` option.
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When run as *non-root*
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----------------------
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* ``$XDG_CONFIG_HOME/libvirt/virtnodedevd.conf``
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The default configuration file used by ``virtnodedevd``, unless overridden on the
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command line using the ``-f``|``--config`` option.
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* ``$XDG_RUNTIME_DIR/libvirt/virtnodedevd-sock``
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* ``$XDG_RUNTIME_DIR/libvirt/virtnodedevd-admin-sock``
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The sockets ``virtnodedevd`` will use.
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* ``$XDG_RUNTIME_DIR/libvirt/virtnodedevd.pid``
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The PID file to use, unless overridden by the ``-p``|``--pid-file`` option.
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If ``$XDG_CONFIG_HOME`` is not set in your environment, ``virtnodedevd`` will use
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``$HOME/.config``
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If ``$XDG_RUNTIME_DIR`` is not set in your environment, ``virtnodedevd`` will use
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``$HOME/.cache``
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EXAMPLES
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========
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To retrieve the version of ``virtnodedevd``:
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::
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# virtnodedevd --version
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virtnodedevd (libvirt) @VERSION@
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To start ``virtnodedevd``, instructing it to daemonize and create a PID file:
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::
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# virtnodedevd -d
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# ls -la @RUNSTATEDIR@/virtnodedevd.pid
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-rw-r--r-- 1 root root 6 Jul 9 02:40 @RUNSTATEDIR@/virtnodedevd.pid
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BUGS
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====
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Please report all bugs you discover. This should be done via either:
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#. the mailing list
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`https://libvirt.org/contact.html <https://libvirt.org/contact.html>`_
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#. the bug tracker
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`https://libvirt.org/bugs.html <https://libvirt.org/bugs.html>`_
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Alternatively, you may report bugs to your software distributor / vendor.
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AUTHORS
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=======
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Please refer to the AUTHORS file distributed with libvirt.
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COPYRIGHT
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=========
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Copyright (C) 2006-2020 Red Hat, Inc., and the authors listed in the
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libvirt AUTHORS file.
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LICENSE
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=======
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``virtnodedevd`` is distributed under the terms of the GNU LGPL v2.1+.
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This is free software; see the source for copying conditions. There
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is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE
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SEE ALSO
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========
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virsh(1), libvirtd(8),
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`https://libvirt.org/daemons.html <https://libvirt.org/daemons.html>`_,
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`https://libvirt.org/drvnodedev.html <https://libvirt.org/drvnodedev.html>`_
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