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

TARGET=`mktemp -d` || exit 1

CLEANUP+=("rmdir $TARGET")

# 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

filesystem_base_dev=$(map_disk0 $blockdev)

CLEANUP+=("unmap_disk0 $blockdev")

mount_disk0 $TARGET

get_os_type

case "${OS_TYPE}" in

    debian)

        HNAME="${TARGET}/etc/hostname"

        OLD_HNAME="$(cat $HNAME)"

        ;;

    redhat)

        HNAME="${TARGET}/etc/sysconfig/network"

        OLD_HNAME="$(grep HOSTNAME ${HNAME} | \

            sed -e 's/HOSTNAME=//' | \

            sed -e s/\"//g)"

        ;;

    gentoo)

        HNAME="${TARGET}/etc/conf.d/hostname"

        OLD_HNAME="$(grep HOSTNAME ${HNAME} | \

            sed -e 's/HOSTNAME=//' | \

            sed -e s/\"//g)"

        ;;

    suse)

        HNAME="${TARGET}/etc/HOSTNAME"

        OLD_HNAME="$(cat $HNAME)"

        ;;

esac

if [ "$OLD_HNAME" = "$old_name" \

        -o "${OLD_HNAME}.$(echo $old_name | cut -d . -f 2,3)" \

        = "$old_name"] ; then

    case "${OS_TYPE}" in

        debian|suse)

            echo $instance > $HNAME

            ;;

        redhat)

            sed -ie "s/HOSTNAME=${OLD_HNAME}/HOSTNAME=${instance}/" $HNAME

            ;;

        gentoo)

            sed -ie "s/HOSTNAME.*/HOSTNAME=\"${OLD_HNAME}}\"/" $HNAME

            ;;

    esac

else

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

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

    exit 1

fi

# execute cleanups

cleanup

trap - EXIT

exit 0