better structure

script/host/zfs/sync/synccontainer-receiver.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+CONTAINER=${1:?"CONTAINER missing"}
+CONTAINER=$(echo $1 | sed -E 's|[^a-zA-Z0-9_-]*||g')
+(
+	flock -n 9 || exit 1
+
+	BACKUPHOST=$(hostname)
+	HOSTOWNER=$(cat /invra/hostowner)
+	SOURCEHOST=$(cat /invra/state/${HOSTOWNER}/containers/${CONTAINER}/current-host)
+
+	MOUNTPOINT="none"
+	DATASET="zpool1/persistent/${CONTAINER}-BACKUP"
+	SNAPSHOT_PREFIX="${DATASET}@SYNC_${BACKUPHOST}_"
+
+	LAST_SNAPSHOT_NAME=""
+	RESUME_TOKEN=""
+	zfs list -Hr -o name -s name "${DATASET}" | grep -E "^${DATASET}$" > /dev/null
+	if [ $? -eq 0 ]; then
+		LAST_SNAPSHOT_NAME=$(zfs list -H -o name -S name -t snapshot -r "${DATASET}" | grep -E "^${SNAPSHOT_PREFIX}" | head -n 1)
+		RESUME_TOKEN="$(zfs get -o value -H receive_resume_token "${DATASET}")"
+	fi
+
+	if [[ "x$RESUME_TOKEN" != "x" && "x$RESUME_TOKEN" != "x-" ]]; then
+		echo "Resume token present trying to resume at $RESUME_TOKEN"
+		LAST_SNAPSHOT_NAME="RESUME"
+	fi
+	
+	if [[ "x${LAST_SNAPSHOT_NAME}" != "x" && "${LAST_SNAPSHOT_NAME}" != "RESUME" ]]; then
+		zfs rollback -r "${LAST_SNAPSHOT_NAME}"
+	fi
+
+	# Beiim zfs receive in der nächsten Zeile fehlt noch das "-s" für resumable streams. Der tzrlxsrv kann das aber momentan nicht. Fehlermeldung: cannot receive resume stream: kernel modules must be upgraded to receive this stream.
+	(while sleep 1; do echo; done) | ssh -o ConnectTimeout=20 -C invencom@${SOURCEHOST} "sudo /invra/scripts/hosts/zfs/synccontainer-sender.sh \"${BACKUPHOST}\" \"${CONTAINER}\" \"${LAST_SNAPSHOT_NAME#$SNAPSHOT_PREFIX}\"" \"${RESUME_TOKEN}\" | zfs receive -v "${DATASET}"
+	if [ $? -ne 0 ]; then
+		exit 1
+	fi
+
+	# Dataset gegen Veränderungen sichern
+	zfs set readonly=on "${DATASET}"
+	zfs set "mountpoint=${MOUNTPOINT}" "${DATASET}"
+
+	# Aufsetzpunkte fremder Synchronisierer wegräumen
+	zfs list -t snapshot -o name -r "${DATASET}" | grep -- "${DATASET}@SYNC" | grep -v -i "_${BACKUPHOST}_" | while read SNAP; do
+		echo "Destroying $SNAP"
+		zfs destroy $SNAP
+	done
+
+	# Alte Snapshots wegräumen
+	while read -r ZEILE
+	do
+		if [ "$ZEILE" = "" ]; then
+			break
+		fi
+		if [[ "$ZEILE" > "$LAST_SNAPSHOT_NAME"  ]]; then
+			break
+		fi
+		zfs destroy "$ZEILE"
+	done < <(zfs list -Hr -o name -s name -t snapshot "${DATASET}" | grep -E "^${SNAPSHOT_PREFIX}")
+) 9>>/tmp/synccontainer.${CONTAINER}.lock
+
+if [ $? -ne 0 ]; then
+	exit 1
+fi
+exit 0