# It also employs an intelligent algorithm to roll off,
# or destroy, old snapshots.
-PATH=/usr/sbin:/sbin:$PATH
+# source our configuration
+config="${0%/*}/zfs-scripts.conf"
+[ -e "${config}.dist" ] && . ${config}.dist
+[ -e "${config}" ] && . ${config}
-if [ -z "$SNAP_UNDER_TEST" ]; then
- exec >> /var/log/zfs/zfs-autosnap.log 2>&1
+if [[ -z "$SNAP_UNDER_TEST" ]]; then
+ exec >> $logdir/zfs-autosnap.log 2>&1
fi
# This script makes the following assumptions/requirements:
mountpoint=${2-/$1}
numsnapshots=${3-12}
maxagedays=${4-0}
-lockdir="/tmp/${filesystem}.lock"
pool=`echo "$filesystem" | awk -F '/' '{ print $1 }'`
if [ -z "$filesystem" ] || [ -z "$mountpoint" ] || [ -z "$numsnapshots" ] || [ -z "$maxagedays" ]; then
fi
if [ -n "$SNAP_UNDER_TEST" ]; then
- snapshotdir="./snapshot"
+ snapshots=$(ls -d ./snapshot/????-??-??.??.?? 2>/dev/null)
else
- snapshotdir="${mountpoint}/.zfs/snapshot"
-fi
-
-if [ ! -d "$snapshotdir" ]; then
- echo "-E- Unable to find the snapshotdir: $snapshotdir"
- exit 1
+ snapshots=$(zfs list -H -t snapshot -o name $filesystem | grep -P "\d+-\d+\.\d+\.\d+")
fi
# Check to see if this zfs filesystem has a scrub being performed on it now.
# If it does, we cannot perform any snapshot create or destroy operations.
if [ -z "$SNAP_UNDER_TEST" ]; then
- zpool status $pool | grep scrub: | grep "in progress" > /dev/null 2>&1
+ zpool status $pool | grep scan: | grep "in progress" > /dev/null 2>&1
if [ $? == 0 ]; then
echo "-W- The zfs pool '$pool' is currently being scrubbed. Skipping all snapshot operations."
exit 0
minutes=$(echo $datetime | datetime_to_minutes)
-lockdir="/tmp/zfs-admin-lock"
if ! mkdir "$lockdir" >/dev/null 2>&1; then
+ echo "-W- The zfs filesystem has been locked down. Skipping snapshot cleanup."
exit 0
fi
cleanup() { rm -rf "$lockdir"; }
trap cleanup EXIT
# Trim them down
-snapshots=$(ls -d ${snapshotdir}/????-??-??.??.?? 2>/dev/null)
for snapshot in $snapshots; do
snapminutes=$(echo "$snapshot" | sed 's,.*/,,' | datetime_to_minutes)
snapminutes2=$(echo "$snapshot" | sed 's,.*/,,' | datetime_to_minutes2)
if [ $age -lt $((window * numsnapshots)) ]; then
case $((snapminutes2 % window)) in
0) ;;
- *)
- snapname=$(echo "$snapshot" |
- sed 's,/\(.*\)/.zfs/snapshot/\(.*\),\1@\2,')
- destroy "$snapname"
- ;;
+ *) destroy "$snapshot" ;;
esac
break
fi
window=$((window*2))
done
if [ $maxagedays -gt 0 ] && [ $age -gt $((maxagedays * 24 * 60)) ]; then
- snapname=$(echo "$snapshot" |
- sed 's,/\(.*\)/.zfs/snapshot/\(.*\),\1@\2,')
- destroy "$snapname"
+ destroy "$snapshot"
fi
done