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

if [ "$GENERATE_CACHE" = "yes" -a ! -d "$CACHE_DIR" ]; then

  mkdir -p "$CACHE_DIR"

fi

DPKG_ARCH=${ARCH:-`dpkg --print-architecture`}

CACHE_FILE="$CACHE_DIR/cache-${SUITE}-${DPKG_ARCH}.tar"

# 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

  # Create one big partition, and make it bootable

  format_disk0 $blockdev

  filesystem_dev=$(map_disk0 $blockdev)

  CLEANUP+=("unmap_disk0 $blockdev")

else

  echo "Unknown partition style $PARTITION_STYLE"

  exit 1

fi

mke2fs -Fjq $filesystem_dev

root_uuid=$($VOL_ID $filesystem_dev )

if [ -n "$swapdev" ]; then

  mkswap $swapdev

  swap_uuid=$($VOL_ID $swapdev || true )

fi

TMPDIR=`mktemp -d` || exit 1

CLEANUP+=("rmdir $TMPDIR")

mount $filesystem_dev $TMPDIR

CLEANUP+=("umount $TMPDIR")

# remove the cache file if it's old (> 2 weeks) and writable by the owner (the

# default due to the standard umask)

if [ "$CLEAN_CACHE" -a -d "$CACHE_DIR" ]; then

  find "$CACHE_DIR" -name 'cache-*.tar' -type f \

    -daystart -mtime "+${CLEAN_CACHE}" -print0 | \

    xargs -r0 rm -f

fi

if [ -f "$CACHE_FILE" ]; then

  tar xf "$CACHE_FILE" -C $TMPDIR

else

  if [ "$PROXY" ]; then

    export http_proxy="$PROXY"

  fi

  # INCLUDE will be empty if EXTRA_PKGS is null/empty, otherwise we

  # build the full parameter format from it

  INCLUDE=${EXTRA_PKGS:+"--include=$EXTRA_PKGS"}

  debootstrap \

    --arch "$DPKG_ARCH" \

    $INCLUDE \

    "$SUITE" $TMPDIR $MIRROR

  # remove the downloaded debs, as they are no longer needed

  find "$TMPDIR/var/cache/apt/archives" -type f -name '*.deb' -print0 | \

    xargs -r0 rm -f

  # remove the persistent-net rules, otherwise it will remember the node's

  # interfaces as eth0, eth1, ...

  rm -f "$TMPDIR/etc/udev/rules.d/z25_persistent-net.rules"

  if [ "$GENERATE_CACHE" = "yes" ]; then

    TMP_CACHE=`mktemp "${CACHE_FILE}.XXXXXX"`

    tar cf "$TMP_CACHE" -C $TMPDIR .

    mv -f "$TMP_CACHE" "$CACHE_FILE"

  fi

fi

cp -p /etc/hosts $TMPDIR/etc/hosts

cp -p /etc/resolv.conf $TMPDIR/etc/resolv.conf

echo $instance > $TMPDIR/etc/hostname

echo $instance > $TMPDIR/etc/mailname

cat > $TMPDIR/etc/fstab <<EOF

# /etc/fstab: static file system information.

#

# <file system>   <mount point>   <type>  <options>       <dump>  <pass>

UUID=$root_uuid   /               ext3    defaults        0       1

proc              /proc           proc    defaults        0       0

EOF

[ -n "$swapdev" -a -n "$swap_uuid" ] && cat >> $TMPDIR/etc/fstab <<EOF

UUID=$swap_uuid   swap            swap    defaults        0       0

EOF

cat > $TMPDIR/etc/network/interfaces <<EOF

auto lo

iface lo inet loopback

EOF

if [ -e $TMPDIR/etc/inittab ]; then

  cat $TMPDIR/etc/inittab | sed -re 's/\stty1$/ console/' \

    > $TMPDIR/etc/inittab.new

  mv $TMPDIR/etc/inittab.new $TMPDIR/etc/inittab

elif [ -e $TMPDIR/etc/event.d/tty1 ]; then

  cat $TMPDIR/etc/event.d/tty1 | sed -re 's/tty1/console/' \

    > $TMPDIR/etc/event.d/console

  rm $TMPDIR/etc/event.d/tty1

fi

RUN_PARTS=`which run-parts`

if [ -n "$RUN_PARTS" -a -n "$CUSTOMIZE_DIR" -a -d "$CUSTOMIZE_DIR" ]; then

  TARGET=$TMPDIR

  BLOCKDEV=$blockdev

  FSYSDEV=$filesystem_dev

  export TARGET SUITE ARCH PARTITION_STYLE EXTRA_PKGS BLOCKDEV FSYSDEV

  $RUN_PARTS $CUSTOMIZE_DIR

fi

# execute cleanups

cleanup

trap - EXIT

exit 0