feat(restic): migrate to systemd template units

roles/restic/files/restic-backup.sh

@@ -8,15 +8,19 @@ fi
 
 echo "List existing snapshots or initialize repository"
 restic snapshots || restic init
-sleep 2;
+sleep 1;
 
 echo "Attempting to remove lock if present"
 restic unlock
-sleep 2
+sleep 1;
 
 echo "Start backup on ${@:1}"
 restic --verbose --retry-lock=${RESTIC_RETRY_LOCK:-5m} backup "${@:1}"
-sleep 2
+sleep 1;
+
+if [[ -n ${RESTIC_POIST_BACKUP_HOOK-} ]]; then
+    /bin/bash -c "$RESTIC_POST_BACKUP_HOOK"
+fi
 
 echo "Forget and prune old snapshots"
 restic forget --prune --retry-lock=${RESTIC_RETRY_LOCK:-5m} \
@@ -29,9 +33,11 @@ restic forget --prune --retry-lock=${RESTIC_RETRY_LOCK:-5m} \
 sleep 2
 
 echo "Generate snapshot metrics"
-restic --json snapshots | /opt/restic-generate-snapshot-metrics.sh \
-    > /var/lib/node_exporter/restic-snapshots-${RESTIC_JOBNAME:-unknown}.prom-src
-sleep 2
+if [[ -n ${RESTIC_GENERATE_SNAPSHOT_METRICS_COMMAND-} ]]; then
+    restic --json snapshots | ${RESTIC_GENERATE_SNAPSHOT_METRICS_COMMAND} \
+        > /var/lib/node_exporter/restic-snapshots-${RESTIC_JOBNAME:-unknown}.prom-src
+    sleep 2;
+fi
 
 echo "Check repository"
 restic check