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f53988d657
Due to the setup of the modular daemon service files the reverting to non-socket
activated daemons could have never worked. The reason is that masking the
socket files prevents starting the daemons since they require (as in Requires=
rather than Wants= in the service file) the sockets. On top of that it creates
issues with some libvirt-guests setups and needlessly increases our support
matrix.
Nothing prevents users to modify their setup in a way that will still work
without socket activation, but supporting such setup only creates burden on our
part.
This technically reverts most of commit 59d30adacd except the change made to
the libvirtd manpage since the monolithic daemon still supports traditional mode
of starting even on systemd.
Signed-off-by: Martin Kletzander <mkletzan@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 neither any client
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connections nor any running domains.
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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://www.libvirt.org/daemons.html <https://www.libvirt.org/daemons.html>`_,
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`https://www.libvirt.org/drvnodedev.html <https://www.libvirt.org/drvnodedev.html>`_
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