♻️ flux kustomizations

kubernetes/apps/flux-system/addons/monitoring/prometheusrule.yaml

@@ -0,0 +1,19 @@
+---
+# yaml-language-server: $schema=https://kubernetes-schemas.devbu.io/prometheusrule_v1.json
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: flux
+  namespace: flux-system
+spec:
+  groups:
+    - name: flux.rules
+      rules:
+        - alert: FluxComponentAbsent
+          annotations:
+            summary: Flux component has disappeared from Prometheus target discovery.
+          expr: |
+            absent(up{job=~".*flux-system.*"} == 1)
+          for: 15m
+          labels:
+            severity: critical