Provided by: libguestfs-tools_1.36.13-1ubuntu3_amd64
libguestfs-test-tool - Diagnostics for libguestfs
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.
--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
Refer to "APPLIANCE BOOT PROCESS" in guestfs(3) to understand the messages produced by libguestfs-test-tool and/or possible errors.
libguestfs-test-tool returns 0 if the tests completed without error, or 1 if there was an error.
For the full list of environment variables which may affect libguestfs, please see the guestfs(3) manual page.
guestfs(3), http://libguestfs.org/, http://qemu.org/.
Richard W.M. Jones ("rjones at redhat dot com")
Copyright (C) 2009-2017 Red Hat Inc.
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.
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.