Synnefo » Ganeti Instance Image

#!/bin/bash

# Copyright (C) 2007, 2008, 2009 Google 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.

set -e

. common.sh

TMPDIR=`mktemp -d` || exit 1

CLEANUP+=("rmdir $TMPDIR")

# If the target device is not a real block device we'll first losetup it.

# This is needed for file disks.

if [ ! -b $blockdev ]; then

  ORIGINAL_BLOCKDEV=$blockdev

  blockdev=$(losetup -sf $blockdev)

  CLEANUP+=("losetup -d $blockdev")

fi

if [ "$PARTITION_STYLE" = "none" ]; then

  filesystem_dev=$blockdev

elif [ "$PARTITION_STYLE" = "msdos" ]; then

  filesystem_dev=$(map_disk0 $blockdev)

  CLEANUP+=("unmap_disk0 $blockdev")

else

  echo "Unknown partition style $PARTITION_STYLE"

  exit 1

fi

mount $filesystem_dev $TMPDIR

CLEANUP+=("umount $TMPDIR")

HNAME="$TMPDIR/etc/hostname"

MNAME="$TMPDIR/etc/mailname"

# for hostname, we raise and error if the old hostname is not what we

# expect

OLD_HNAME="`cat $HNAME`"

if [ "$OLD_HNAME" = "$old_name" ]; then

	echo $instance > $HNAME

else

	log_error "Cannot rename from $old_name to $instance:"

	log_error "Instance has a different hostname ($OLD_HNAME)"

	exit 1

fi

# for mailname, we rename only if it has the old name, otherwise we

# ignore it (and assumme that it's a customized name)

if [ "`cat $MNAME`" = "$old_name" ]; then

	echo $instance > $MNAME

fi

# execute cleanups

cleanup

trap - EXIT

exit 0