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