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75 lines
2.3 KiB
Bash
75 lines
2.3 KiB
Bash
#!/bin/bash
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# 2014-2021 Dave Bechtel
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# 2020.1005 mod for auto-month
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# 2021.0303 fixed date pmonth for debian (something about 'date' syntax changed, different from Ubuntu)
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# test for interactive shell / OK to ask for input
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intera=1
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[ $(echo $- |grep i |wc -l) -gt 0 ] && intera=0
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# TODO comment if you want auto
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#mymonth=Mar
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outfile=/tmp/zfs-killmonth-tmp.txt
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#source ~/bin/failexit.mrg
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# failexit.mrg
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function failexit () {
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echo '! Something failed! Code: '"$1 $2" # code # (and optional description)
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exit $1
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}
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#zfs-list-snaps--boojum.sh |grep virtb |grep Jan |awk '{print $1}' |xargs -n1 -t zfs-killsnaps.sh
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# REF: https://stackoverflow.com/questions/13168463/using-date-command-to-get-previous-current-and-next-month
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# The fuzz in units can cause problems with relative items.
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# To determine the previous month more reliably, you can ask for the month before the 15th of current month
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#pmonth=$(date --date="$(date +%Y-%m-15) -2 month" |awk '{print $2}')
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# 2021.0303 fix for debian
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pmonth=$(date -d '2 months ago' |awk '{print $3}')
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# arg NOT blank
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[ "$1" = "" ] || mymonth=$1
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# arg IS blank
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[ "$1" = "" ] && [ "$mymonth" = "" ] && mymonth=$pmonth
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# sanity check for valid month
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validmo="Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"
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sanity=$(echo "$validmo" |grep -c $mymonth) # will NOT allow "July", only 3-letter
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echo "$sanity"
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if [ $sanity -eq 0 ]; then
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failexit 12 "! Invalid month specified: $mymonth"
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fi
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echo "$(date) - DF before:" > $outfile
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df -h -T |head -n 1 >> $outfile
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df -h -T |grep zfs >> $outfile
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# could use more error checking if $mymonth = 0 lines...
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# NOTE requires another script in the PATH
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numlines=$(zfs-list-snaps--boojum.sh |grep $mymonth |wc -l)
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if [ $numlines -gt 0 ]; then
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echo "o KILLING THESE SNAPSHOTS:" >> $outfile
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zfs-list-snaps--boojum.sh |grep $mymonth >> $outfile # full dump of snapshots to delete
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echo "Killing $numlines snapshots for $mymonth ... PK to proceed!"
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[ $intera -gt 0 ] && read
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else
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failexit 101 "No $mymonth snapshots found to kill!"
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fi
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# killzem - NOTE requires another script in the PATH
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zfs-list-snaps--boojum.sh |grep $mymonth |awk '{print $1}' |xargs -n1 -t zfs-killsnaps.sh
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# review
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[ $intera -gt 0 ] && zfs-list-snaps--boojum.sh |less
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echo "$(date) - DF after:" >> $outfile
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#df -h >> $outfile
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df -h -T |head -n 1 >> $outfile
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df -h -T |grep zfs >> $outfile
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[ $intera -gt 0 ] && less $outfile
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