#!/bin/bash
set -e
SNAP_UID=$1
SNAP_MOUNTPOINT="$2"
if [[ $SNAP_UID == "" ]]; then
echo "No snapshot uid specified"
exit 1
fi
if [[ "$SNAP_MOUNTPOINT" == "" ]]; then
echo "Snapshot mountpoint is empty"
exit 1
fi
if ! test -e $SNAP_MOUNTPOINT; then
echo "Snapshot at $SNAP_MOUNTPOINT was already removed"
exit 0
fi
if ! df -T -P | egrep "${SNAP_MOUNTPOINT}\$" > /dev/null 2>&1; then
echo "Snapshot is not mounted. Already removed"
rmdir "${SNAP_MOUNTPOINT}"
exit 0
fi
if lsblk -r --output "NAME,MOUNTPOINT" --paths > /dev/null 2>&1; then
VOLNAME=`lsblk -r --output "NAME,MOUNTPOINT" --paths | egrep " ${SNAP_MOUNTPOINT}\$" | head -n 1 | tr -s " " | cut -d" " -f1`
else
VOLNAME=`lsblk -r --output "NAME,MOUNTPOINT" | egrep " ${SNAP_MOUNTPOINT}\$" | head -n 1 | tr -s " " | cut -d" " -f1`
VOLNAME="/dev/mapper/$VOLNAME"
fi
if [ "x$VOLNAME" = x ]; then
echo "Could not find LVM volume for mountpoint ${SNAP_MOUNTPOINT}"
exit 1
fi
if [ ! -e "$VOLNAME" ]; then
echo "LVM volume for mountpoint ${SNAP_MOUNTPOINT} does not exist"
exit 1
fi
echo "Unmounting $VOLNAME at /mnt/urbackup_snaps/${SNAP_UID}..."
if ! umount /mnt/urbackup_snaps/${SNAP_UID}; then
sleep 10
umount /mnt/urbackup_snaps/${SNAP_UID}
fi
rmdir "${SNAP_MOUNTPOINT}"
echo "Destroying LVM snapshot $VOLNAME..."
export LVM_SUPPRESS_FD_WARNINGS=1
lvremove -f "$VOLNAME"
