ansitest/ZFS/zfs-1week-snapshot.sh
2021-05-31 11:21:26 -05:00

76 lines
2.4 KiB
Bash

#!/bin/bash
# 2014-2021 Dave Bechtel
# this runs in cron.daily
# and keeps 7 days of rotating snapshots
# example cron:
# run zfs snapshot @ 11:45pm mon,wed,fri
#45 23 * * 1,3,5 /root/bin/boojum/zfs-1week-snapshot.sh
# + plus optional 28-31 days of rotating snapshots, depending on days in month (will need to be uncommented)
logfile=/root/zfs-1week-snapshot.log
snaplog=/root/zfs-snaplist-all.log
/bin/mv -vf $snaplog $snaplog-old
PATH=/sbin:/root/bin:/root/bin/boojum:/usr/local/bin:/usr/local/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin: #/usr/NX/bin:/usr/games:
echo "=== START RUN $(date) - zfs 1-week +28-31 day snapshot" >> $logfile
myday=$(date +%a) # ex. Sun
mydnum=$(date +%d) # ex. 04
echo "= BEGIN Stage 1: DF before" >> $logfile
df -h -T |grep zfs >> $logfile
#zfs list -H -t snapshot |column -t >> $logfile
for i in $(zpool list |grep -v ALLOC |awk '{ print $1 }');do
echo "= INFO $i:$myday:$mydnum" >> $logfile
# kill ANY preexisting snapshot with this daylabel
echo "= BEGIN Stage 2: Destroy existing snaps for pool $i" >> $logfile
zfs destroy -R -v $i@$myday 2>&1 >>$logfile;rc=$?
echo "= DESTROY $i@$myday RTN CODE:$rc" >> $logfile
# 28-31 days
zfs destroy -R -v $i@zfsDOM$mydnum 2>&1 >>$logfile;rc=$?
echo "= DESTROY $i@zfsDOM$mydnum RTN CODE:$rc" >> $logfile
# this is for 28-31 days, uncomment if needed beyond 1 week
# zfs snapshot -r $i@zfsDOM$mydnum
zfs snapshot -r $i@$myday
done
echo "= BEGIN Stage 3: Today Snaps after, DF after" >> $logfile
#zfs list -H -t snapshot |grep $myday >> $logfile
#zfs list -H -t snapshot |grep $mydnum >> $logfile
# ALL snaps here
#zfs list -H -t snapshot |column -t > $snaplog
# Requires another script in the same PATH
zfs-list-snaps--boojum.sh |column -t > $snaplog
# Only today+wkly here
#zfs-list-snaps--boojum.sh |egrep "@$myday|DOM$mydnum|weekly" |column -t >> $logfile
df -h -T |grep zfs >> $logfile
echo "=== END RUN zfs 1wk/28-31 day snapshot: $(date)" >> $logfile
# DONE while we're here, keep 28-31 day number backups too
exit 0;
2017.1228 switched make-snapshot order to have ex. "Wed" after DOM to avoid snapshot rollback "newer exists"
+ fixed df -h -T |grep zfs since others may not have zfs filesystems starting w/Z
TODO log rotation 1/mo
2017.1229 DONE zfs-list-snaps instead (shows creation date
DONE save space in log - when listing snapshots, only list relevent-day
DONE enumerated stages better (for searching