fix(mycloud-nextcloud): improve metrics and alerts (workaround)

mycloud-nextcloud/templates/release.yaml

@@ -215,6 +215,11 @@ spec:
 
     metrics:
       enabled: true
+      image:
+        tag: 0.8.0
+      info:
+        apps: true
+        update: true
 
     prometheus:
       serviceMonitor:

mycloud-nextcloud/templates/rules.yaml

@@ -0,0 +1,40 @@
+{{- if (.Capabilities.APIVersions.Has "monitoring.coreos.com/v1/PrometheusRule") }}
+---
+# workaround till https://github.com/nextcloud/helm/pull/694 is merged
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: {{ .Release.Name }}
+  labels:
+    {{- toYaml .Values.commons.prometheus.rules.labels | nindent 4 }}
+spec:
+  groups:
+    - name: {{ .Release.Name }}-Defaults
+      rules:
+        - alert: "nextcloud: not reachable"
+          expr: 'avg(nextcloud_last_update_seconds{  }) without(endpoint,container,pod,instance) < 1'
+          labels:
+            severity: "critical"
+          {{`
+          annotations:
+            summary: "Nextcloud in {{ $labels.namespace }} is not reachable by exporter"
+          `}}
+
+        - alert: "nextcloud: outdated version"
+          expr: 'sum(nextcloud_system_update_available{  }) without(endpoint,container,pod,instance) > 0'
+          labels:
+            severity: "warning"
+          {{`
+          annotations:
+            summary: "Nextcloud in {{ $labels.namespace }} is outdated"
+          `}}
+
+        - alert: "nextcloud: outdated apps"
+          expr: 'sum(nextcloud_apps_updates_available_total{  }) without(endpoint,container,pod,instance) > 0'
+          labels:
+            severity: "warning"
+          {{`
+          annotations:
+            summary: "Nextcloud in {{ $labels.namespace }} has {{ $value }} outdated Apps"
+          `}}
+{{- end }}