feat: add flux PodMonitor

kubernetes/flux/config/kustomization.yaml

@@ -2,6 +2,7 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
-  - ./flux.yaml
   - ./cluster.yaml
+  - ./flux.yaml
+  - ./podmonitor.yaml
   - ./telegram-provider.yaml

kubernetes/flux/config/podmonitor.yaml

@@ -0,0 +1,30 @@
+apiVersion: monitoring.coreos.com/v1
+kind: PodMonitor
+metadata:
+  name: flux-system
+  namespace: flux-system
+  labels:
+    app.kubernetes.io/part-of: flux
+    app.kubernetes.io/component: monitoring
+spec:
+  namespaceSelector:
+    matchNames:
+      - flux-system
+  selector:
+    matchExpressions:
+      - key: app
+        operator: In
+        values:
+          - helm-controller
+          - source-controller
+          - kustomize-controller
+          - notification-controller
+          - image-automation-controller
+          - image-reflector-controller
+  podMetricsEndpoints:
+    - port: http-prom
+      relabelings:
+        # https://github.com/prometheus-operator/prometheus-operator/issues/4816
+        - sourceLabels: [__meta_kubernetes_pod_phase]
+          action: keep
+          regex: Running