zsc.sh: fix snapshot creation and deletion order
fix script lock use faster zfs snapshot list commands
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06a1b7aec7
commit
9e16259e52
41
zsc.sh
41
zsc.sh
@ -9,8 +9,8 @@ DATE=$(date $FORMAT)
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### LOCK ###
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echo "Locking ZSC"
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if ! lockfile-create -p -r 2 "zsc"; then
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echo "Locking $0"
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if ! lockfile-create -p -r 2 "$0"; then
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echo "Another backup is running, aborting"
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exit 49
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fi
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@ -37,20 +37,28 @@ handle_dataset() {
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PREFIX=""
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fi
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echo "--- $DATASET --- $D $W $M $Y $PREFIX"
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SNAPSHOTS=($(zfs list -t snapshot -o name | grep "$DATASET@$PREFIX" | sort -r))
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echo "Snapshots: ${#SNAPSHOTS[@]}"
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EXISTS=0
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# Create new snapshot
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if [ $(zfs list -t snapshot -o name "$DATASET" | grep "$DATE" | head -n1 | wc -l) -eq 0 ]; then
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echo -e
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if [ $AUTO_CREATE == "true" ]; then
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echo -e "Creating snapshot $DATASET@$PREFIX$DATE"
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zfs snapshot "$DATASET@$PREFIX$DATE"
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else
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echo -e "Skip snapshot creation"
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fi
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echo -e
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fi
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# Delete old snapshots
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SNAPSHOTS=($(zfs list -t snapshot -o name "$DATASET" | grep "@$PREFIX" | sort -r))
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for s in "${SNAPSHOTS[@]}"; do
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sdate=$(echo "$s" | awk 'match($0, /.+@'"$PREFIX"'(.+)/, a) {print a[1]}')
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if [ "$sdate" = $DATE ]; then
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EXISTS=1
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fi
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scomp=($(split_date "$sdate") $(date -d "$stripped_date" "+%u %W"))
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echo -n "${scomp[3]} ${scomp[4]} | "
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@ -74,15 +82,6 @@ handle_dataset() {
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echo "DISCARD"
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fi
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done
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if [ $EXISTS -eq 0 ]; then
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if [ $AUTO_CREATE == "true" ]; then
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echo -e "Creating snapshot $DATASET@$PREFIX$DATE"
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zfs snapshot $DATASET@$PREFIX$DATE
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else
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echo -e "Skip snapshot creation"
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fi
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fi
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}
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cat "$CONFIG_FILE" | while IFS=: read dataset recursive auto_create d w m y prefix; do
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@ -105,5 +104,5 @@ done
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### UNLOCK ###
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echo "Unlocking ZSC"
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lockfile-remove "zsc"
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echo "Unlocking $0"
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lockfile-remove "$0"
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