apps(metrics): Add rbac config

apps/metrics/app.yaml

@@ -1,11 +1,12 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
-namespace: kube-system
+namespace: metrics
 metadata:
   name: metrics
 resources:
   - app/namespace.yaml
   - app/metrics-sealedsecret.yaml
   - app/release.yaml
+  - app/rbac.yaml
   - app/route.yaml
   - app/monitor.yaml

apps/metrics/app/rbac.yaml

@@ -0,0 +1,45 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: prometheus
+  namespace: metrics
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: prometheus
+  namespace: metrics
+rules:
+- apiGroups: [""]
+  resources:
+  - nodes
+  - nodes/metrics
+  - services
+  - endpoints
+  - pods
+  verbs: ["get", "list", "watch"]
+- apiGroups: [""]
+  resources:
+  - configmaps
+  verbs: ["get"]
+- apiGroups:
+  - networking.k8s.io
+  resources:
+  - ingresses
+  verbs: ["get", "list", "watch"]
+- nonResourceURLs: ["/metrics"]
+  verbs: ["get"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: prometheus
+  namespace: metrics
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: prometheus
+subjects:
+- kind: ServiceAccount
+  name: prometheus
+  namespace: metrics