VIRTLOCKD(8) Virtualization Support VIRTLOCKD(8)
NAME
virtlockd - libvirt lock management daemon
SYNOPSIS
virtlockd [OPTION]...
DESCRIPTION
The virtlockd program is a server side daemon component of the libvirt
virtualization management system that is used to manage locks held
against virtual machine resources, such as their disks.
This daemon is not used directly by libvirt client applications, rather
it is called on their behalf by libvirtd. By maintaining the locks in a
standalone daemon, the main libvirtd daemon can be restarted without
risk of losing locks. The virtlockd daemon has the ability to
re-exec() itself upon receiving SIGUSR1, to allow live upgrades without
downtime.
The virtlockd daemon listens for requests on a local Unix domain
socket.
OPTIONS
-h, --help
Display command line help usage then exit.
-d, --daemon
Run as a daemon and write PID file.
-f, --config FILE
Use this configuration file, overriding the default value.
-t, --timeout SECONDS
Automatically shutdown after SECONDS have elapsed with no active client
or lock.
-p, --pid-file FILE
Use this name for the PID file, overriding the default value.
-v, --verbose
Enable output of verbose messages.
-V, --version
Display version information then exit.
SIGNALS
On receipt of SIGUSR1, virtlockd will re-exec() its binary, while main-
taining all current locks and clients. This allows for live upgrades of
the virtlockd service.
FILES
When run as root
o /etc/libvirt/virtlockd.conf
The default configuration file used by virtlockd, unless overridden on
the command line using the -f | --config option.
o /run/libvirt/virtlockd-sock
The sockets virtlockd will use.
o /run/virtlockd.pid
The PID file to use, unless overridden by the -p | --pid-file option.
When run as non-root
o $XDG_CONFIG_HOME/libvirt/virtlockd.conf
The default configuration file used by virtlockd, unless overridden on
the command line using the -f | --config option.
o $XDG_RUNTIME_DIR/libvirt/virtlockd-sock
The socket virtlockd will use.
o $XDG_RUNTIME_DIR/libvirt/virtlockd.pid
The PID file to use, unless overridden by the -p | --pid-file option.
If $XDG_CONFIG_HOME is not set in your environment, virtlockd will use
$HOME/.config
If $XDG_RUNTIME_DIR is not set in your environment, virtlockd will use
$HOME/.cache
EXAMPLES
To retrieve the version of virtlockd:
# virtlockd --version
virtlockd (libvirt) 8.0.0
To start virtlockd, instructing it to daemonize and create a PID file:
# virtlockd -d
# ls -la /run/virtlockd.pid
-rw-r--r-- 1 root root 6 Jul 9 02:40 /run/virtlockd.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 / ven-
dor.
AUTHORS
Please refer to the AUTHORS file distributed with libvirt.
COPYRIGHT
Copyright (C) 2006-2013 Red Hat, Inc., and the authors listed in the
libvirt AUTHORS file.
LICENSE
virtlockd 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 PUR-
POSE
SEE ALSO
libvirtd(8), https://libvirt.org/
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