better structure

script/host/zfs/snapshot/snapshot.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+HOUR=$(date -u "+%Y%m%d%H")
+DAY=${HOUR:0:8}
+MONTH=${HOUR:0:6}
+HOSTOWNER=$(cat /invra/hostowner)
+if [ ! -d /tmp/locks ]; then
+	mkdir /tmp/locks
+fi
+
+zfs list -Hr -o name zpool1/persistent | grep -v -- -BACKUP | tail -n +2 | while read DATASET; do
+	CONTAINER=${DATASET#zpool1/persistent/}
+	(
+		flock -n 9 || exit 1
+
+		MODE_FILE="/invra/state/$HOSTOWNER/containers/$CONTAINER/snapshot-mode"
+		HOURLY=1
+		DAILY=1
+		MONTHLY=1
+
+		if [ -f "$MODE_FILE" ]; then
+			grep -i "NONE" "$MODE_FILE" &> /dev/null
+			if [ $? -eq 0 ]; then
+				exit
+			fi
+			grep -i "HOURLY" "$MODE_FILE" &> /dev/null
+			if [ $? -ne 0 ]; then
+				HOURLY=0
+			fi
+			grep -i "DAILY" "$MODE_FILE" &> /dev/null
+			if [ $? -ne 0 ]; then
+				DAILY=0
+			fi
+			grep -i "MONTHLY" "$MODE_FILE" &> /dev/null
+			if [ $? -ne 0 ]; then
+				MONTHLY=0
+			fi
+		fi
+		SNAPSHOT_HOUR="${DATASET}@SNAPHOURLY_${HOUR}"
+		SNAPSHOT_DAY="${DATASET}@SNAPDAILY_${DAY}"
+		SNAPSHOT_MONTH="${DATASET}@SNAPMONTHLY_${MONTH}"
+
+		zfs list -H -t snapshot -o name -r "$DATASET" | grep -E "^${SNAPSHOT_HOUR}$" > /dev/null
+		if [[ $? -ne 0 && $HOURLY -eq 1 ]]; then
+			zfs snapshot "${SNAPSHOT_HOUR}"
+		fi
+
+		zfs list -H -t snapshot -o name -r "$DATASET" | grep -E "^${SNAPSHOT_DAY}$" > /dev/null
+		if [[ $? -ne 0 && $DAILY -eq 1 ]]; then
+			zfs snapshot "${SNAPSHOT_DAY}"
+		fi
+
+		zfs list -H -t snapshot -o name -r "$DATASET" | grep -E "^${SNAPSHOT_MONTH}$" > /dev/null
+		if [[ $? -ne 0 && $MONTHLY -eq 1 ]]; then
+			zfs snapshot "${SNAPSHOT_MONTH}"
+		fi
+	) 9>>/tmp/locks/snapshot.${CONTAINER}.lock
+done