add the rbac support

add the k8s's rbac support

examples/deployment/nginx/nginx-ingress-controller.yaml

@@ -1,3 +1,39 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: ingress
+  namespace: kube-system
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  name: system:ingress
+rules:
+- apiGroups:
+  - ""
+  resources: ["configmaps","secrets","endpoints","events","services"]
+  verbs: ["list","watch","create","update","delete","get"]
+- apiGroups:
+  - ""
+  - "extensions"
+  resources: ["services","nodes","ingresses","pods"]
+  verbs: ["list","watch","create","update","delete","get"]
+
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: ingress
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: system:ingress
+subjects:
+  - kind: ServiceAccount
+    name: ingress
+    namespace: kube-system 
+
+---
 apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
@@ -20,6 +56,7 @@ spec:
       # that said, since hostPort is broken on CNI (https://github.com/kubernetes/kubernetes/issues/31307) we have to use hostNetwork where CNI is used
       # like with kubeadm
       # hostNetwork: true
+      serviceAccountName: ingress
       terminationGracePeriodSeconds: 60
       containers:
       - image: gcr.io/google_containers/nginx-ingress-controller:0.9.0-beta.5