/usr/bin/xen-delete-image is in xen-tools 4.6.2-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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=encoding utf8
=head1 NAME
xen-delete-image - Delete previously created Xen instances.
=head1 SYNOPSIS
xen-delete-image [options] [--hostname=]imageName1 [--hostname=]imageName2
Filename Options:
--extension Specify the file extension to use. An empty extension is equal
to any extension.
Help Options:
--help Show help information.
--manual Read the manual for this script.
--version Show the version information and exit.
--verbose Show diagnostic output.
General options:
--dir Specify the output directory where images were previously saved.
--evms Specify the EVMS container to use.
--lvm Specify the LVM volume to use.
Specifying hosts:
--hostname Specify the image name to delete.
Testing options:
--test Don't complain if we're not invoked by root.
=head1 OPTIONS
=over 8
=item B<--dir>
Specify the output directory where images were previously saved.
=item B<--evms>
Specify the EVMS container where images were previously saved.
=item B<--help>
Show help information.
=item B<--hostname>
Specify the hostname to delete.
=item B<--lvm>
Specify the LVM volume group where images were previously saved.
=item B<--manual>
Read the manual for this script.
=item B<--test>
Do not complain, or exit, if the script is not executed by the root
user. (Only works in conjunction with --dir.)
=item B<--version>
Show the version number and exit.
=back
=head1 DESCRIPTION
xen-delete-image is a simple script which allows you to delete
Xen instances which have previously been created by xen-create-image.
You must be root to run this script as it removes the Xen configuration
file from /etc/xen and potentially removes LVM and EVMS volumes.
(When invoked with the '--test' flag the script will continue running,
but will fail to remove anything which the user does not have permission
to delete.)
=head1 LOOPBACK EXAMPLE
Assuming that you have three images 'foo', 'bar', and 'baz', stored
beneath /home/xen the first two may be deleted via:
xen-delete-image --dir=/home/xen foo bar
You may also delete them by running:
xen-delete-image --dir=/home/xen --hostname=foo --hostname=bar
(The matching Xen configuration files beneath /etc/xen will also be
removed.)
=head1 LVM EXAMPLE
Assuming that you have the volume group 'skx-vol' containing three
Xen instances 'foo', 'bar', and 'baz' the first two may be deleted via:
xen-delete-image --lvm=skx-vol foo bar
This will remove the volumes 'foo-disk', 'foo-swap', 'bar-disk',
and 'bar-swap'.
Note that if the images were created with "--noswap" then the swap
volumes will not be present, so will not need to be deleted.
The Xen configuration files will also be removed from beneath /etc/xen.
=head1 EVMS EXAMPLE
Assuming that you have the container 'mycontainer' containing three
Xen instances 'foo', 'bar', and 'baz' the first two may be deleted via:
xen-delete-image --evms=lvm2/mycontainer --hostname=foo --hostname=bar
This will remove the volumes 'foo-disk', 'foo-swap', 'bar-disk',
and 'bar-swap'.
Note that if the images were created with "--noswap" then the swap
volumes will not be present, so will not need to be deleted.
The Xen configuration files will also be removed.
=head1 AUTHORS
Steve Kemp, http://www.steve.org.uk/
Axel Beckert, http://noone.org/abe/
Stéphane Jourdois
=head1 LICENSE
Copyright (c) 2005-2009 by Steve Kemp, (c) 2010-2013 by The Xen-Tools
Development Team. All rights reserved.
This module is free software;
you can redistribute it and/or modify it under
the same terms as Perl itself.
The LICENSE file contains the full text of the license.
=cut
use strict;
use English;
use Getopt::Long;
use Pod::Usage;
use File::Path;
use Xen::Tools::Common;
#
# Configuration options, initially read from the configuration files
# but may be overridden by the command line.
#
# Command line flags *always* take precedence over the configuration file.
#
my %CONFIG;
#
# Release number.
#
my $RELEASE = '4.6.2';
#
# Find xen toolstack command
#
$CONFIG{ 'xm' } = findXenToolstack();
#
# Default values
#
$CONFIG{ 'extension' } = '.cfg';
#
# Read the global configuration file if it exists.
#
if ( -e "/etc/xen-tools/xen-tools.conf" )
{
readConfigurationFile("/etc/xen-tools/xen-tools.conf", \%CONFIG);
}
#
# Parse command line arguments, these override the values from the
# configuration file.
#
parseCommandLineArguments();
#
# Check that we got valid arguments.
#
checkArguments();
#
# Abort if non-root user.
#
if ( ( !$CONFIG{ 'test' } ) && ( $EFFECTIVE_USER_ID != 0 ) )
{
print <<E_O_ROOT;
This script is not running with root privileges, so the configuration
file(s) beneath /etc/xen will not be removed.
E_O_ROOT
exit 127;
}
#
# Loop over the supplied arguments, and attempt to delete each
# image. Check both, bare parameters as well as --hostname options.
#
my @hosts = ();
if (exists($CONFIG{ 'hostname' }) and defined($CONFIG{ 'hostname' })) {
my $hostname_option = $CONFIG{ 'hostname' };
@hosts = 'ARRAY' eq ref($hostname_option) ?
@$hostname_option : $hostname_option;
}
foreach my $name (@ARGV, @hosts)
{
my %PER_HOST_CONFIG = %CONFIG;
$PER_HOST_CONFIG{ 'hostname' } = $name;
unless ( xenRunning($name, \%PER_HOST_CONFIG) )
{
deleteXenImage($name);
}
else
{
print "Skipping xen guest '$name' - it appears to be running.\n";
}
}
#
# All done.
#
exit 0;
=begin doc
Parse the arguments specified upon the command line.
=end doc
=cut
sub parseCommandLineArguments
{
my $HELP = 0;
my $MANUAL = 0;
my $VERSION = 0;
$CONFIG{ 'dry-run' } = 0;
# Parse options.
#
GetOptions( "dir=s", \$CONFIG{ 'dir' },
"dry-run", \$CONFIG{ 'dry-run' },
"lvm=s", \$CONFIG{ 'lvm' },
"evms=s", \$CONFIG{ 'evms' },
"extension:s", \$CONFIG{ 'extension' },
"hostname=s@", \$CONFIG{ 'hostname' },
"test", \$CONFIG{ 'test' },
"verbose", \$CONFIG{ 'verbose' },
"no-xen-ok", sub { warn "Option --no-xen-ok is deprecated and ignored."; },
"help", \$HELP,
"manual", \$MANUAL,
"version", \$VERSION
);
pod2usage(1) if $HELP;
pod2usage( -verbose => 2 ) if $MANUAL;
if ($VERSION)
{
print "xen-delete-image release $RELEASE\n";
exit;
}
}
=begin doc
Check that we received the arguments we expected.
=end doc
=cut
sub checkArguments
{
#
# When testing we only care about loopback images, not disk images.
#
if ( $CONFIG{ 'test' } and ( $CONFIG{ 'lvm' } or $CONFIG{ 'evms' } ))
{
print "Error: --test only works with --dir.\n";
exit 1;
}
#
# Make sure we got one and only one installation method.
#
my $count = 0;
foreach my $type (qw/dir lvm evms/)
{
$count += 1 if defined( $CONFIG{ $type } );
}
#
# Show a decent error for when either zero or more than one options
# were selected.
#
if ( $count != 1 )
{
print "Please select one and only one of the installation methods to delete the DomU:\n";
print " --dir\n";
print " --evms\n";
print " --lvm\n";
exit 2;
}
}
=begin doc
Delete the named image, and the corresponding configuration file
from /etc/xen.
=end doc
=cut
sub deleteXenImage
{
my ($hostname) = (@_);
#
# Collect the names of files to delete.
#
my @delete;
#
# Delete the Xen auto-start file if it exists.
#
if ( -e "/etc/xen/auto/$hostname".$CONFIG{ 'extension' } )
{
push( @delete, "/etc/xen/auto/$hostname".$CONFIG{ 'extension' } );
}
#
# Delete the Xen configuration file if it exists.
#
if ( -e "/etc/xen/$hostname".$CONFIG{ 'extension' } )
{
push( @delete, "/etc/xen/$hostname".$CONFIG{ 'extension' } );
}
#
# If we're working on disk images remove them.
#
foreach my $file (@delete)
{
if ( -e $file )
{
if ($CONFIG{ 'dry-run' }) {
print "Would delete: $file\n";
} else {
print "Deleting: $file\n";
unlink($file);
}
}
else
{
print "Ignoring missing file: $file\n";
}
}
my %PER_HOST_CONFIG = %CONFIG;
$PER_HOST_CONFIG{ 'hostname' } = $hostname;
if ( defined( $CONFIG{ 'dir' } ) )
{
my $prefix = $CONFIG{ 'dir' } . "/domains/";
#
# Now remove the directory.
#
if ( -d $prefix . $hostname )
{
if ($CONFIG{ 'dry-run' }) {
print "Would delete: $prefix$hostname\n";
} else {
print "Removing: " . $prefix . $hostname . "\n";
rmtree( $prefix . $hostname );
}
}
}
elsif ( defined( $CONFIG{ 'lvm' } ) )
{
#
# LVM volumes
#
#
# TODO: Check we're not mounted.
#
if ( -e "/dev/$CONFIG{'lvm'}/$hostname-swap" )
{
if ($CONFIG{ 'dry-run' }) {
print "Would remove LVM swap volume /dev/$CONFIG{'lvm'}/$hostname-swap\n";
} else {
print "Removing swap volume\n";
runCommand("lvremove /dev/$CONFIG{'lvm'}/$hostname-swap --force", \%PER_HOST_CONFIG);
}
}
if ( -e "/dev/$CONFIG{'lvm'}/$hostname-disk" )
{
if ($CONFIG{ 'dry-run' }) {
print "Would remove LVM disk volume /dev/$CONFIG{'lvm'}/$hostname-disk\n";
} else {
print "Removing LVM disk volume\n";
runCommand("lvremove /dev/$CONFIG{'lvm'}/$hostname-disk --force", \%PER_HOST_CONFIG);
}
}
}
elsif ( defined( $CONFIG{ 'evms' } ) )
{
#
# EVMS volumes
#
#
# TODO: Check we're not mounted.
#
if ( -e "/dev/evms/$hostname-swap" )
{
if ($CONFIG{ 'dry-run' }) {
print "Would remove EVMS swap volume: /dev/evms/$hostname-swap\n";
print "Would remove EVMS swap volume: $CONFIG{'evms'}/$hostname-swap\n";
} else {
print "Removing EVMS swap volume\n";
runCommand("echo Delete : /dev/evms/$hostname-swap | evms", \%PER_HOST_CONFIG);
runCommand("echo Delete : $CONFIG{'evms'}/$hostname-swap | evms", \%PER_HOST_CONFIG);
}
}
if ( -e "/dev/evms/$hostname-disk" )
{
if ($CONFIG{ 'dry-run' }) {
print "Would remove EVMS disk volume: /dev/evms/$hostname-swap\n";
print "Would remove EVMS disk volume: $CONFIG{'evms'}/$hostname-swap\n";
} else {
print "Removing EVMS disk volume\n";
runCommand("echo Delete : /dev/evms/$hostname-disk | evms", \%PER_HOST_CONFIG);
runCommand("echo Delete : $CONFIG{'evms'}/$hostname-disk | evms", \%PER_HOST_CONFIG);
}
}
}
else
{
print "Error: No installation type specified\n";
print "Can't happen!\n";
print "Hostname : $hostname\n";
exit 127;
}
}
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