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
You can tell supermin to try a different kernel. You do this by setting the environment variables "SUPERMIN_KERNEL", "SUPERMIN_KERNEL_VERSION" and/or "SUPERMIN_MODULES". Refer to "ENVIRONMENT VARIABLES" in supermin(1) 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) 2009-2016 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:
* The version of libguestfs.
* Where you got libguestfs (eg. which Linux distro, compiled from
source, etc)
* Describe the bug accurately and give a way to reproduce it.
* Run libguestfs-test-tool(1) and paste the complete, unedited output
into the bug report.
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