Synnefo » Ganeti Instance Image

#!/bin/bash

# Copyright (C) 2010 Oregon State University

#

# 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

debug set -x

# 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 [ ! "${NOMOUNT}" = "yes" ] ; then

    filesystem_dev=$(map_disk0 $blockdev)

    CLEANUP+=("unmap_disk0 $blockdev")

    root_dev=$(map_partition $filesystem_dev root)

    boot_dev=$(map_partition $filesystem_dev boot)

fi

TARGET=`mktemp -d` || exit 1

CLEANUP+=("rmdir $TARGET")

if [ "${NOMOUNT}" = "yes" ] ; then

    # convert block device to qcow2 image to support OS's like Windows. Use

    # qcow2 to conserve on space.

    $QEMU_IMG convert $blockdev -O qcow2 ${TARGET}/disk.img

    CLEANUP+=("rm ${TARGET}/disk.img")

else

    vol_type_root="$($VOL_TYPE $root_dev)"

    if [ -n "${boot_dev}" ] ; then

        vol_type_boot="$($VOL_TYPE $boot_dev)"

    fi

    for fs in boot root ; do

        # use indirect reference to make the variables dynamic

        dev="$(eval "echo \${$(echo ${fs}_dev)"})"

        vol_type="$(eval echo \$vol_type_${fs})"

        if [ -z "$vol_type" -a -n "${dev}" ] ; then

            log_error "Unable to find ${fs} filesystem type at ${dev}"

            exit 1

        fi

        if [ -n "${dev}" ] ; then

            if [ "$vol_type" = "ext3" -o "$vol_type" = "ext2" \

                    -o "$vol_type" = "ext4" ] ; then

                $DUMP -0 -q -z9 -f ${TARGET}/${fs}.dump $dev

                CLEANUP+=("rm ${TARGET}/${fs}.dump")

            else

                log_error "${fs} is not a supported filesystem. Please use ext{2,3,4}"

                exit 1

            fi

        fi

    done

fi

( cd $TARGET ; tar -cf - . )

# execute cleanups

cleanup

trap - EXIT

exit 0