code.grnet.gr Git - snf-image/blob - snf-image-host/snf-image-update-helper.in

   1 #!/bin/bash
   2
   3 set -e
   4 set -x
   5
   6 . @osdir@/common.sh
   7
   8 CACHE_FILE="$HELPER_DIR/cache.tar"
   9 ARCH=amd64
  10 EXTRA_PKGS="linux-image-amd64,e2fsprogs,ntfs-3g,xmlstarlet"
  11
  12 helper_img=$(mktemp $HELPER_DIR/image.XXXXXXXX)
  13
  14 dd if=/dev/zero of=$helper_img bs=1k count=400000
  15 blockdev=$(losetup -sf $helper_img)
  16 CLEANUP+=("losetup -d $blockdev")
  17
  18 format_disk0 $blockdev "extdump"
  19
  20 root_dev=$(map_disk0 $blockdev)-1
  21 CLEANUP+=("unmap_disk0 $blockdev")
  22
  23 mkfs.ext3 $root_dev
  24
  25 TMPDIR=$(mktemp -d)
  26 CLEANUP+=("rmdir $TMPDIR")
  27
  28 mount $root_dev $TMPDIR
  29 CLEANUP+=("umount $root_dev")
  30
  31 if [  -f "$CACHE_FILE" ]; then
  32     tar xf "$CACHE_FILE" -C $TMPDIR
  33 else
  34     debootstrap --arch "$ARCH" --include $EXTRA_PKGS --variant=minbase \
  35             squeeze $TMPDIR
  36
  37     # remove the downloaded debs, as they are no longer needed
  38     find "$TMPDIR/var/cache/apt/archives" -type f -name '*.deb' -print0 | \
  39         xargs -r0 rm -f
  40
  41     TMP_CACHE=$(mktemp "${CACHE_FILE}.XXXXXX")
  42     tar cf "$TMP_CACHE" -C $TMPDIR .
  43     mv -f "$TMP_CACHE" "$CACHE_FILE"
  44 fi
  45
  46 echo helper > $TMPDIR/etc/hostname
  47
  48 cat > $TMPDIR/etc/fstab <<EOF
  49 # /etc/fstab: static file system information.
  50 #
  51 # <file system>   <mount point>   <type>  <options>       <dump>  <pass>
  52 /dev/sda1         /               ext3    defaults        0       1
  53 proc              /proc           proc    defaults        0       0
  54 EOF
  55
  56 if [ ! -L "$TMPDIR/vmlinuz" -o ! -L "$TMPDIR/vmlinuz" ]; then
  57
  58         log_error "vmlinuz or initrd.img link in root is missing."
  59         log_error "I don't know how to find a usable kernel/initrd pair."
  60         exit 1
  61 fi
  62
  63 kernel=$(readlink -en $TMPDIR/vmlinuz)
  64 initrd=$(readlink -en $TMPDIR/initrd.img)
  65
  66 echo "Moving $(basename $kernel) and $(basename $initrd) to $HELPER_DIR"
  67 mv $kernel $initrd $HELPER_DIR
  68
  69 kernel=$(basename $kernel)
  70 initrd=$(basename $initrd)
  71
  72 (cd $HELPER_DIR; ln -fs $kernel kernel; ln -fs $initrd initrd)
  73
  74 rm $TMPDIR/vmlinuz $TMPDIR/initrd.img
  75
  76 cleanup
  77
  78 mv $helper_img $HELPER_DIR/image
  79
  80 trap - EXIT
  81
  82 exit 0
  83
  84 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :