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-$disk`
19 test -d /dev/shm/$rbd_image.snap || mkdir /dev/shm/$rbd_image.snap
21 # we must mount filesystem read-write to allow journal recovery
22 offset=`fdisk -l $rbd_dev -u -o Device,Start,Type | grep 'Linux$' | grep $rbd_dev | head -1 | sed 's/\*/ /' | awk '{ print \$2 * 512 }'`
23 test ! -z "$offset" && offset=",offset=$offset"
24 mount $rbd_dev /dev/shm/$rbd_image.snap -o noatime$offset
26 # execute something on mounted filesystem
27 read -p "wait for key" key
30 umount /dev/shm/$rbd_image.snap
32 rbd unmap backup-$instance-$disk
33 rbd rm backup-$instance-$disk
35 rbd snap unprotect $rbd_image@backup
36 rbd snap rm $rbd_image@backup
38 rmdir /dev/shm/$rbd_image.snap