6 test -z "$1" -o -z "$2" && echo "Usage: $0 instance disk" && exit 1
8 rbd_image=`gnt-instance info --static $instance | grep logical_id: | cut -d\' -f4 | grep "\.rbd\.disk$disk\$"`
10 test -z "$rbd_image" && echo "can't find rbd_image name for $instance $disk" && exit 1
12 rbd snap add $rbd_image@backup
13 rbd snap protect $rbd_image@backup
15 rbd clone $rbd_image@backup backup-$instance-$disk
17 rbd_dev=`rbd map backup-$instance-$disk`
19 mkdir /dev/shm/$rbd_image.snap
21 # FIXME: test does offset work
22 # we must mount filesystem read-write to allow journal recovery
23 #offset=\`fdisk -l $rbd_dev -u | grep Linux$ | grep $rbd_dev | head -1 | sed 's/\*/ /' | awk '{ print \$2 * 512 }'\`
24 #test ! -z "\$offset" && offset=",offset=\$offset"
25 #mount $rbd_dev /dev/shm/\$rbd_image.snap -o noatime\$offset
26 mount $rbd_dev /dev/shm/$rbd_image.snap -o noatime$offset
28 # execute something on mounted filesystem
29 read -p "wait for key" key
32 umount /dev/shm/$rbd_image.snap
34 rbd unmap backup-$instance-$disk
35 rbd rm backup-$instance-$disk
37 rbd snap unprotect $rbd_image@backup
38 rbd snap rm $rbd_image@backup
40 rmdir /dev/shm/$rbd_image.snap