Add ServiceMonitor for multi platform controller (#3918)

Author: stuartwdouglas

components/multi-platform-controller/base/kustomization.yaml

@@ -2,11 +2,11 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
+- monitoring.yaml
 - allow-argocd-to-manage.yaml
 - https://github.com/redhat-appstudio/multi-platform-controller/deploy/operator?ref=3a6fa5f72ac3ffa4acd018427b3b9cb0f900ca50
 - https://github.com/redhat-appstudio/multi-platform-controller/deploy/otp?ref=3a6fa5f72ac3ffa4acd018427b3b9cb0f900ca50
 
-
 images:
 - name: multi-platform-controller
   newName: quay.io/redhat-user-workloads/rhtap-build-tenant/multi-arch-controller/multi-arch-controller

components/multi-platform-controller/base/monitoring.yaml

@@ -0,0 +1,48 @@
+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: ClusterRole
+metadata:
+  name: multi-platform-controller-metrics-reader
+rules:
+- nonResourceURLs:
+  - /metrics
+  verbs:
+  - get
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: prometheus-multi-platform-controller-metrics-reader
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: multi-platform-controller-reader
+subjects:
+- kind: ServiceAccount
+  name: metrics-reader
+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: multi-platform-controller
+spec:
+  endpoints:
+  - path: /metrics
+    interval: 15s
+    port: http-metrics
+    scheme: http
+  selector:
+    matchLabels:
+      app: multi-platform-controller