Create system:cluster-autoscaler account & role and introduce it to CA start-up script

cluster/addons/rbac/cluster-autoscaler/cluster-autoscaler-rbac.yaml

@@ -0,0 +1,64 @@
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: cluster-autoscaler
+  labels:
+    addonmanager.kubernetes.io/mode: Reconcile
+rules:
+  # leader election
+  - apiGroups: [""]
+    resources: ["endpoints"]
+    verbs: ["create"]
+  - apiGroups: [""]
+    resources: ["endpoints"]
+    resourceNames: ["cluster-autoscaler"]
+    verbs: ["get", "update", "patch", "delete"]
+  # accessing & modifying cluster state (nodes & pods)
+  - apiGroups: [""]
+    resources: ["nodes"]
+    verbs: ["get", "list", "watch", "update", "patch"]
+  - apiGroups: [""]
+    resources: ["pods"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: [""]
+    resources: ["pods/eviction"]
+    verbs: ["create"]
+  # read-only access to cluster state
+  - apiGroups: [""]
+    resources: ["services", "replicationcontrollers", "persistentvolumes", "persistentvolumeclaims"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["apps", "extensions"]
+    resources: ["daemonsets", "replicasets"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["apps"]
+    resources: ["statefulsets"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["policy"]
+    resources: ["poddisruptionbudgets"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["storage.k8s.io"]
+    resources: ["storageclasses"]
+    verbs: ["get", "list", "watch"]
+  # misc access
+  - apiGroups: [""]
+    resources: ["events"]
+    verbs: ["create", "update", "patch"]
+  - apiGroups: [""]
+    resources: ["configmaps"]
+    verbs: ["get", "list", "watch", "create", "update", "patch", "delete", "deletecollection"]
+---
+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: cluster-autoscaler
+  labels:
+    addonmanager.kubernetes.io/mode: Reconcile
+subjects:
+  - kind: User
+    name: cluster-autoscaler
+    namespace: kube-system
+roleRef:
+  kind: ClusterRole
+  name: cluster-autoscaler
+  apiGroup: rbac.authorization.k8s.io
+