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ZFS/zfs-killmonth-snaps-debianfix.sh

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+#!/bin/bash
+
+# 2020.1005 mod for auto-month
+# 2021.0303 fixed date pmonth for debian
+
+# test for interactive shell / OK to ask for input
+intera=1
+[ `echo $- |grep i |wc -l` -gt 0 ] && intera=0
+
+# TODO comment if you want auto
+#mymonth=Mar
+outfile=/tmp/zfs-killmonth-tmp.txt
+
+source ~/bin/failexit.mrg
+
+#zfs-list-snaps--boojum.sh |grep virtb |grep Jan |awk '{print $1}' |xargs -n1 -t zfs-killsnaps.sh
+
+# REF: https://stackoverflow.com/questions/13168463/using-date-command-to-get-previous-current-and-next-month
+
+# The fuzz in units can cause problems with relative items. 
+# To determine the previous month more reliably, you can ask for the month before the 15th of current month
+#pmonth=$(date --date="$(date +%Y-%m-15) -2 month" |awk '{print $2}')
+# 2021.0303 fix for debian
+pmonth=$(date -d '2 months ago' |awk '{print $3}')
+
+# arg NOT blank
+[ "$1" = "" ] || mymonth=$1
+# arg IS blank
+[ "$1" = "" ] && [ "$mymonth" = "" ] && mymonth=$pmonth
+
+# sanity check for valid month
+validmo="Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"
+sanity=$(echo "$validmo" |grep -c $mymonth) # will NOT allow "July", only 3-letter
+echo "$sanity"
+
+if [ $sanity -eq 0 ]; then
+  failexit 12 "! Invalid month specified: $mymonth"
+fi
+
+echo "`date` - DF before:" > $outfile
+df -h -T |head -n 1 >> $outfile
+df -h -T |grep zfs >> $outfile
+
+# could use more error checking if $mymonth = 0 lines...
+numlines=`zfs-list-snaps--boojum.sh |grep $mymonth |wc -l`
+if [ $numlines -gt 0 ]; then
+  echo "o KILLING THESE SNAPSHOTS:" >> $outfile
+  zfs-list-snaps--boojum.sh |grep $mymonth >> $outfile # full dump of snapshots to delete
+
+  echo "Killing $numlines snapshots for $mymonth ... PK to proceed!"
+[ $intera -gt 0 ] && read
+else
+  failexit 101 "No $mymonth snapshots found to kill!"
+fi
+
+# killzem
+zfs-list-snaps--boojum.sh |grep $mymonth |awk '{print $1}' |xargs -n1 -t zfs-killsnaps.sh
+
+# review
+[ $intera -gt 0 ] && zfs-list-snaps--boojum.sh |less
+
+echo "`date` - DF after:" >> $outfile
+#df -h >> $outfile
+df -h -T |head -n 1 >> $outfile
+df -h -T |grep zfs >> $outfile
+
+[ $intera -gt 0 ] && less $outfile

ZFS/zfs-killmonth-snaps.sh

@@ -0,0 +1,63 @@
+#!/bin/bash
+
+# 2020.1005 mod for auto-month
+
+# test for interactive shell / OK to ask for input
+intera=1
+[ `echo $- |grep i |wc -l` -gt 0 ] && intera=0
+
+# TODO comment if you want auto
+#mymonth=Mar
+outfile=/tmp/zfs-killmonth-tmp.txt
+
+source ~/bin/failexit.mrg
+
+#zfs-list-snaps--boojum.sh |grep virtb |grep Jan |awk '{print $1}' |xargs -n1 -t zfs-killsnaps.sh
+
+# REF: https://stackoverflow.com/questions/13168463/using-date-command-to-get-previous-current-and-next-month
+
+# The fuzz in units can cause problems with relative items. 
+# To determine the previous month more reliably, you can ask for the month before the 15th of current month
+pmonth=$(date --date="$(date +%Y-%m-15) -2 month" |awk '{print $2}')
+
+# arg NOT blank
+[ "$1" = "" ] || mymonth=$1
+# arg IS blank
+[ "$1" = "" ] && [ "$mymonth" = "" ] && mymonth=$pmonth
+
+# sanity check for valid month
+validmo="Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"
+sanity=`echo $validmo |grep -c $mymonth` # will NOT allow "July", only 3-letter
+
+if [ $sanity -eq 0 ]; then
+  failexit 12 "! Invalid month specified: $mymonth"
+fi
+
+echo "`date` - DF before:" > $outfile
+df -h -T |head -n 1 >> $outfile
+df -h -T |grep zfs >> $outfile
+
+# could use more error checking if $mymonth = 0 lines...
+numlines=`zfs-list-snaps--boojum.sh |grep $mymonth |wc -l`
+if [ $numlines -gt 0 ]; then
+  echo "o KILLING THESE SNAPSHOTS:" >> $outfile
+  zfs-list-snaps--boojum.sh |grep $mymonth >> $outfile # full dump of snapshots to delete
+
+  echo "Killing $numlines snapshots for $mymonth ... PK to proceed!"
+[ $intera -gt 0 ] && read
+else
+  failexit 101 "No $mymonth snapshots found to kill!"
+fi
+
+# killzem
+zfs-list-snaps--boojum.sh |grep $mymonth |awk '{print $1}' |xargs -n1 -t zfs-killsnaps.sh
+
+# review
+[ $intera -gt 0 ] && zfs-list-snaps--boojum.sh |less
+
+echo "`date` - DF after:" >> $outfile
+#df -h >> $outfile
+df -h -T |head -n 1 >> $outfile
+df -h -T |grep zfs >> $outfile
+
+[ $intera -gt 0 ] && less $outfile