rbd_image=`gnt-instance info --static $instance | grep logical_id: | cut -d\' -f4 | grep "\.rbd\.disk$disk\$"`
test -z "$rbd_image" && echo "can't find rbd_image name for $instance $disk" && exit 1
rbd_image=`gnt-instance info --static $instance | grep logical_id: | cut -d\' -f4 | grep "\.rbd\.disk$disk\$"`
test -z "$rbd_image" && echo "can't find rbd_image name for $instance $disk" && exit 1