Fix RBAC configuration

Signed-off-by: Mikkel Oscar Lyderik Larsen <mikkel.larsen@zalando.de>

docs/rbac.yaml

@@ -3,9 +3,7 @@ apiVersion: v1
 metadata:
   name: custom-metrics-apiserver
   namespace: kube-system
-
 ---
-
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
@@ -15,9 +13,17 @@ rules:
   - custom.metrics.k8s.io
   resources: ["*"]
   verbs: ["*"]
-
 ---
-
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: external-metrics-server-resources
+rules:
+- apiGroups:
+  - external.metrics.k8s.io
+  resources: ["*"]
+  verbs: ["*"]
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
@@ -32,14 +38,19 @@ rules:
   verbs:
   - get
   - list
-
 ---
-
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
   name: custom-metrics-resource-collector
 rules:
+- apiGroups:
+  - ""
+  resources:
+  - events
+  verbs:
+  - create
+  - patch
 - apiGroups:
   - ""
   resources:
@@ -59,9 +70,15 @@ rules:
   - ingresses
   verbs:
   - get
-
+- apiGroups:
+  - autoscaling
+  resources:
+  - horizontalpodautoscalers
+  verbs:
+  - get
+  - list
+  - watch
 ---
-
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata:
@@ -74,9 +91,20 @@ subjects:
 - kind: ServiceAccount
   name: horizontal-pod-autoscaler
   namespace: kube-system
-
 ---
-
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: hpa-controller-external-metrics
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: external-metrics-server-resources
+subjects:
+- kind: ServiceAccount
+  name: horizontal-pod-autoscaler
+  namespace: kube-system
+---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: RoleBinding
 metadata:
@@ -90,9 +118,7 @@ subjects:
 - kind: ServiceAccount
   name: custom-metrics-apiserver
   namespace: kube-system
-
 ---
-
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata:
@@ -105,9 +131,7 @@ subjects:
 - kind: ServiceAccount
   name: custom-metrics-apiserver
   namespace: kube-system
-
 ---
-
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata: