align monitoring roles with new controller-gen version

Author: bruelea

config/rbac/auth_proxy_client_clusterrole.yaml

@@ -9,13 +9,15 @@ resources:
 - role_binding.yaml
 - leader_election_role.yaml
 - leader_election_role_binding.yaml
-# Comment the following 4 lines if you want to disable
-# the auth proxy (https://github.com/brancz/kube-rbac-proxy)
-# which protects your /metrics endpoint.
-# - auth_proxy_service.yaml
-# - auth_proxy_role.yaml
-# - auth_proxy_role_binding.yaml
-# - auth_proxy_client_clusterrole.yaml
+# The following RBAC configurations are used to protect
+# the metrics endpoint with authn/authz. These configurations
+# ensure that only authorized users and service accounts
+# can access the metrics endpoint. Comment the following
+# permissions if you want to disable this protection.
+# More info: https://book.kubebuilder.io/reference/metrics.html
+- metrics_auth_role.yaml
+- metrics_auth_role_binding.yaml
+- metrics_reader_role.yaml
 # For each CRD, "Editor" and "Viewer" roles are scaffolded by
 # default, aiding admins in cluster management. Those roles are
 # not used by the Project itself. You can comment the following lines

config/rbac/auth_proxy_role.yaml

@@ -0,0 +1,17 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: metrics-auth-role
+rules:
+- apiGroups:
+  - authentication.k8s.io
+  resources:
+  - tokenreviews
+  verbs:
+  - create
+- apiGroups:
+  - authorization.k8s.io
+  resources:
+  - subjectaccessreviews
+  verbs:
+  - create

config/rbac/auth_proxy_role_binding.yaml

@@ -0,0 +1,12 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: metrics-auth-rolebinding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: metrics-auth-role
+subjects:
+- kind: ServiceAccount
+  name: controller-manager
+  namespace: system

config/rbac/auth_proxy_service.yaml

@@ -0,0 +1,9 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: metrics-reader
+rules:
+- nonResourceURLs:
+  - "/metrics"
+  verbs:
+  - get