add rule

clusters/cl01tl/helm/volsync/templates/prometheus-rule.yaml

@@ -0,0 +1,31 @@
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: volsync
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app.kubernetes.io/name: volsync
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/part-of: {{ .Release.Name }}
+spec:
+  groups:
+    - name: volsync.rules
+      rules:
+        - alert: VolSyncComponentAbsent
+          annotations:
+            summary: VolSync component has disappeared from Prometheus target discovery.
+          expr: |
+            absent(up{job="volsync-metrics"})
+          for: 15m
+          labels:
+            severity: critical
+        - alert: VolSyncVolumeOutOfSync
+          annotations:
+            summary: >-
+              {{ $labels.obj_namespace }}/{{ $labels.obj_name }} volume
+              is out of sync.
+          expr: |
+            volsync_volume_out_of_sync == 1
+          for: 15m
+          labels:
+            severity: critical