virtlockd(8) [centos man page]
VIRTLOCKD(8) Virtualization Support VIRTLOCKD(8) NAME
virtlockd - libvirt lock management daemon SYNOPSIS
virtlockd [ -dv ] [ -f config_file ] [ -p pid_file ] virtlockd --version 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. -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 maintaining all current locks and clients. This allows for live upgrades of the virtlockd service. FILES
When run as root. SYSCONFDIR/virtlockd.conf The default configuration file used by virtlockd, unless overridden on the command line using the -f|--config option. LOCALSTATEDIR/run/libvirt/virtlockd-sock The sockets libvirtd will use. LOCALSTATEDIR/run/virtlockd.pid The PID file to use, unless overridden by the -p|--pid-file option. When run as non-root. $XDG_CONFIG_HOME/virtlockd.conf The default configuration file used by libvirtd, unless overridden on the command line using the -f|--config option. $XDG_RUNTIME_DIR/libvirt/virtlockd-sock The socket libvirtd will use. $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, libvirtd will use $HOME/.config If $XDG_RUNTIME_DIR is not set in your environment, libvirtd will use $HOME/.cache EXAMPLES
To retrieve the version of virtlockd: # virtlockd --version virtlockd (libvirt) 1.1.1 # To start virtlockd, instructing it to daemonize and create a PID file: # virtlockd -d # ls -la LOCALSTATEDIR/run/virtlockd.pid -rw-r--r-- 1 root root 6 Jul 9 02:40 LOCALSTATEDIR/run/virtlockd.pid # BUGS
Please report all bugs you discover. This should be done via either: a) the mailing list <http://libvirt.org/contact.html> or, b) the bug tracker <http://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) 2006-2013 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 PURPOSE SEE ALSO
libvirtd(8), <http://www.libvirt.org/> libvirt-1.1.1 2014-06-17 VIRTLOCKD(8)
Check Out this Related Man Page
libguestfs-test-tool(1) Virtualization Support libguestfs-test-tool(1) NAME
libguestfs-test-tool - Diagnostics for libguestfs SYNOPSIS
libguestfs-test-tool [--options] DESCRIPTION
libguestfs-test-tool is a test program shipped with libguestfs to allow you to check basic libguestfs functionality is working. This is needed because libguestfs occasionally breaks for reasons beyond our control: usually because of changes in the underlying qemu or kernel packages, or the host environment. If you suspect a problem in libguestfs, then just run: libguestfs-test-tool It will print lots of diagnostic messages. If it runs to completion successfully, you will see this near the end: ===== TEST FINISHED OK ===== and the test tool will exit with code 0. If it fails (and/or exits with non-zero error code), please paste the complete, unedited output of the test tool into a bug report. More information about reporting bugs can be found on the http://libguestfs.org/ website. OPTIONS
--help Display short usage information and exit. --qemu qemu_binary If you have downloaded another qemu binary, point this option at the full path of the binary to try it. --qemudir qemu_source_dir If you have compiled qemu from source, point this option at the source directory to try it. -t N --timeout N Set the launch timeout to "N" seconds. The default is 600 seconds (10 minutes) which does not usually need to be adjusted. -V --version Display the libguestfs version number and exit. TRYING OUT A DIFFERENT VERSION OF QEMU
If you have compiled another version of qemu from source and would like to try that, then you can use the --qemudir option to point to the qemu source directory. If you have downloaded a qemu binary from somewhere, use the --qemu option to point to the binary. Note when using these options, you can ignore the business of qemu wrapper scripts ("QEMU WRAPPERS" in guestfs(3)), since libguestfs-test- tool writes a wrapper script for you if one is needed. TRYING OUT A DIFFERENT KERNEL
If you are using supermin / febootstrap >= 3.8 then you can select which kernel libguestfs tries. You do this by setting the environment variables "SUPERMIN_KERNEL" and/or "SUPERMIN_MODULES" ("FEBOOTSTRAP_KERNEL" and "FEBOOTSTRAP_MODULES" if still using the old febootstrap 3.21 program). Refer to "ENVIRONMENT VARIABLES" in supermin-helper(8) for further information. TRYING OUT A DIFFERENT VERSION OF LIBVIRT
To find out which backend is the default in your libguestfs package, do: unset LIBGUESTFS_BACKEND guestfish get-backend If you are using the libvirt backend, then you can try out a different (eg. upstream) version of libvirt by running these commands (not as root): killall libvirtd lt-libvirtd ~/path/to/libvirt/run libguestfs-test-tool The first command kills any session "libvirtd" process(es) that may be running on the machine. The second command uses libvirt's "run" script (in the top-level libvirt build directory) to set some environment variables so that the alternate version of libvirt is used to run the program. TRYING OUT WITH
/ WITHOUT LIBVIRT To find out which backend is the default in your libguestfs package, do: unset LIBGUESTFS_BACKEND guestfish get-backend If you are using the libvirt backend, you can try without (ie. libguestfs directly launching qemu) by doing: export LIBGUESTFS_BACKEND=direct Or if you are using the default (direct) backend, then you can try libvirt: export LIBGUESTFS_BACKEND=libvirt or with libvirt and a specific libvirt URI: export LIBGUESTFS_BACKEND=libvirt:qemu:///session TRYING OUT DIFFERENT SELINUX SETTINGS
To find out which backend is the default in your libguestfs package, do: unset LIBGUESTFS_BACKEND guestfish get-backend To find out if SELinux is being used, do: getenforce If you are using libvirt, SELinux and sVirt, then you can try to see if changing SELinux to "permissive" mode makes any difference. Use this command as root: setenforce Permissive If this makes a difference, look in the audit logs for recent failures ("AVCs"): ausearch -m avc -ts recent You can convert AVCs into suggested SELinux policy rules using tools like audit2allow(1). For more information, see the "Security Enhanced Linux User Guide". To reenable SELinux and sVirt, do: setenforce Enforcing SELF-DIAGNOSIS Refer to "APPLIANCE BOOT PROCESS" in guestfs(3) to understand the messages produced by libguestfs-test-tool and/or possible errors. EXIT STATUS
libguestfs-test-tool returns 0 if the tests completed without error, or 1 if there was an error. ENVIRONMENT VARIABLES
For the full list of environment variables which may affect libguestfs, please see the guestfs(3) manual page. SEE ALSO
guestfs(3), http://libguestfs.org/, http://qemu.org/. AUTHORS
Richard W.M. Jones ("rjones at redhat dot com") COPYRIGHT
Copyright (C) 2009-2013 Red Hat Inc. LICENSE
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. BUGS
To get a list of bugs against libguestfs, use this link: https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools To report a new bug against libguestfs, use this link: https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools When reporting a bug, please supply: o The version of libguestfs. o Where you got libguestfs (eg. which Linux distro, compiled from source, etc) o Describe the bug accurately and give a way to reproduce it. o Run libguestfs-test-tool(1) and paste the complete, unedited output into the bug report. libguestfs-1.22.6 2013-08-24 libguestfs-test-tool(1)