add prometheus monitor for image-controller (#3092)

Signed-off-by: Robert Cerven <[email protected]>

components/image-controller/base/kustomization.yaml

@@ -1,5 +1,6 @@
 resources:
 - allow-argocd-to-manage.yaml
+- monitoring.yaml
 - rbac
 
 namespace: image-controller

components/image-controller/base/monitoring.yaml

@@ -0,0 +1,43 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: metrics-reader
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: metrics-reader
+  annotations:
+    kubernetes.io/service-account.name: metrics-reader
+type: kubernetes.io/service-account-token
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: prometheus-image-controller-metrics-reader
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: image-controller-metrics-reader
+subjects:
+- kind: ServiceAccount
+  name: metrics-reader
+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: image-controller
+spec:
+  endpoints:
+  - path: /metrics
+    interval: 15s
+    port: https
+    scheme: https
+    bearerTokenSecret:
+      name: "metrics-reader"
+      key: token
+    tlsConfig:
+      insecureSkipVerify: true
+  selector:
+    matchLabels:
+      control-plane: controller-manager