git.rot13.org Git - gnt-info/blob - rbd-snap-backup.sh

   1 #!/bin/sh -xe
   2
   3 test -z "$1" -o -z "$2" && echo "Usage: $0 instance disk" && exit 1
   4
   5 instance=$1
   6 disk=$2
   7 test -z "$backup" && backup="backup"
   8 test -z "$rsync_server" && rsync_server="lib15"
   9
  10 test "`rsync $rsync_server::$backup/$instance/$disk 2>/dev/null | wc -l`" != 1 && echo "ERROR $rsync_server::$backup/$instance/$disk backup target missing" && exit 1
  11
  12 rbd_image=`gnt-instance info --static $instance | grep logical_id: | cut -d\' -f4 | grep "\.rbd\.disk$disk\$"`
  13
  14 test -z "$rbd_image" && echo "can't find rbd_image name for $instance $disk" && exit 1
  15
  16 rbd snap add     $rbd_image@backup
  17 rbd snap protect $rbd_image@backup
  18
  19 rbd clone        $rbd_image@backup backup-$instance-$disk
  20
  21 rbd_dev=`rbd map backup-$instance-$disk`
  22
  23 test -d /dev/shm/$rbd_image.snap || mkdir /dev/shm/$rbd_image.snap
  24
  25 # we must mount filesystem read-write to allow journal recovery
  26 offset=`fdisk -l $rbd_dev -u -o Device,Start,Type | grep 'Linux$' | grep $rbd_dev | head -1 | sed 's/\*/ /' | awk '{ print \$2 * 512 }'`
  27 test ! -z "$offset" && offset=",offset=$offset"
  28 mount $rbd_dev /dev/shm/$rbd_image.snap -o noatime$offset
  29
  30
  31 # XXX do rsync back to $rsync_server
  32
  33 rsync_args=""
  34 if rsync $rsync_server::$backup/$instance/rsync.args /dev/shm/$instance-rsync.args 2>/dev/null ; then
  35         rsync_args="`cat /dev/shm/$instance-rsync.args`"
  36 fi
  37
  38 rsync -ravHzXA --inplace --numeric-ids --delete $rsync_args \
  39         /dev/shm/$rbd_image.snap/ $rsync_server::$backup/$instance/$disk/ \
  40 && ssh -i /etc/ganeti/id_dsa-zfs-snap $rsync_server $rsync_server/$backup/$instance/$disk
  41
  42 # XXX backup OK
  43
  44
  45
  46 umount /dev/shm/$rbd_image.snap
  47
  48 rbd unmap backup-$instance-$disk
  49 rbd rm    backup-$instance-$disk
  50
  51 rbd snap unprotect $rbd_image@backup
  52 rbd snap rm        $rbd_image@backup
  53
  54 rmdir /dev/shm/$rbd_image.snap
  55