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193 lines
5.0 KiB
Plaintext
193 lines
5.0 KiB
Plaintext
=head1 NAME
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libguestfs-test-tool - Diagnostics for libguestfs
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=head1 SYNOPSIS
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libguestfs-test-tool [--options]
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=head1 DESCRIPTION
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libguestfs-test-tool is a test program shipped with libguestfs to
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allow you to check basic libguestfs functionality is working. This is
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needed because libguestfs occasionally breaks for reasons beyond our
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control: usually because of changes in the underlying qemu or kernel
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packages, or the host environment.
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If you suspect a problem in libguestfs, then just run:
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libguestfs-test-tool
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It will print lots of diagnostic messages.
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If it runs to completion successfully, you will see this near the end:
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===== TEST FINISHED OK =====
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and the test tool will exit with code 0.
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If it fails (and/or exits with non-zero error code), please paste the
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I<complete, unedited> output of the test tool into a bug report. More
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information about reporting bugs can be found on the
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L<http://libguestfs.org/> website.
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=head1 OPTIONS
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=over 4
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=item B<--help>
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Display short usage information and exit.
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=item B<--qemu qemu_binary>
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If you have downloaded another qemu binary, point this option at the
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full path of the binary to try it.
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=item B<--qemudir qemu_source_dir>
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If you have compiled qemu from source, point this option at the source
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directory to try it.
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=item B<-t N>
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=item B<--timeout N>
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Set the launch timeout to C<N> seconds. The default is 600 seconds
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(10 minutes) which does not usually need to be adjusted.
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=item B<-V>
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=item B<--version>
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Display the libguestfs version number and exit.
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=back
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=head1 TRYING OUT A DIFFERENT VERSION OF QEMU
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If you have compiled another version of qemu from source and would
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like to try that, then you can use the I<--qemudir> option to point to
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the qemu source directory.
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If you have downloaded a qemu binary from somewhere, use the I<--qemu>
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option to point to the binary.
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Note when using these options, you can ignore the business of qemu
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wrapper scripts (L<guestfs(3)/QEMU WRAPPERS>), since
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libguestfs-test-tool writes a wrapper script for you if one is needed.
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=head1 TRYING OUT A DIFFERENT KERNEL
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If you are using supermin / febootstrap E<ge> 3.8 then you can select
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which kernel libguestfs tries. You do this by setting the environment
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variables C<SUPERMIN_KERNEL> and/or C<SUPERMIN_MODULES>
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(C<FEBOOTSTRAP_KERNEL> and C<FEBOOTSTRAP_MODULES> if still using the
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old febootstrap 3.21 program).
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Refer to L<supermin(1)/ENVIRONMENT VARIABLES> for further information.
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=head1 TRYING OUT A DIFFERENT VERSION OF LIBVIRT
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To find out which backend is the default in your libguestfs
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package, do:
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unset LIBGUESTFS_BACKEND
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guestfish get-backend
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If you are using the libvirt backend, then you can try out a
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different (eg. upstream) version of libvirt by running these commands
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(I<not> as root):
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killall libvirtd lt-libvirtd
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~/path/to/libvirt/run libguestfs-test-tool
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The first command kills any session C<libvirtd> process(es) that may
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be running on the machine. The second command uses libvirt's C<run>
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script (in the top-level libvirt build directory) to set some
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environment variables so that the alternate version of libvirt is used
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to run the program.
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=head1 TRYING OUT WITH / WITHOUT LIBVIRT
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To find out which backend is the default in your libguestfs
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package, do:
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unset LIBGUESTFS_BACKEND
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guestfish get-backend
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If you are using the libvirt backend, you can try without
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(ie. libguestfs directly launching qemu) by doing:
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export LIBGUESTFS_BACKEND=direct
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Or if you are using the default (direct) backend, then you
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can try libvirt:
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export LIBGUESTFS_BACKEND=libvirt
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or with libvirt and a specific
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L<libvirt URI|http://libvirt.org/uri.html>:
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export LIBGUESTFS_BACKEND=libvirt:qemu:///session
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=head1 TRYING OUT DIFFERENT SELINUX SETTINGS
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To find out which backend is the default in your libguestfs
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package, do:
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unset LIBGUESTFS_BACKEND
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guestfish get-backend
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To find out if SELinux is being used, do:
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getenforce
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If you are using libvirt, SELinux and sVirt, then you can try to see
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if changing SELinux to "permissive" mode makes any difference. Use
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this command as root:
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setenforce Permissive
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If this makes a difference, look in the audit logs for recent
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failures ("AVCs"):
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ausearch -m avc -ts recent
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You can convert AVCs into suggested SELinux policy rules using tools
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like L<audit2allow(1)>. For more information, see the "Security
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Enhanced Linux User Guide".
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To reenable SELinux and sVirt, do:
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setenforce Enforcing
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=head1 SELF-DIAGNOSIS
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Refer to L<guestfs(3)/APPLIANCE BOOT PROCESS> to understand the
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messages produced by libguestfs-test-tool and/or possible errors.
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=head1 EXIT STATUS
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libguestfs-test-tool returns I<0> if the tests completed without
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error, or I<1> if there was an error.
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=head1 ENVIRONMENT VARIABLES
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For the full list of environment variables which may affect
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libguestfs, please see the L<guestfs(3)> manual page.
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=head1 SEE ALSO
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L<guestfs(3)>,
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L<http://libguestfs.org/>,
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L<http://qemu.org/>.
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=head1 AUTHORS
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Richard W.M. Jones (C<rjones at redhat dot com>)
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=head1 COPYRIGHT
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Copyright (C) 2009-2014 Red Hat Inc.
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