*   RBAC objects are now stored in etcd in v1 format. After upgrading to 1.9, ensure all RBAC objects (Roles, RoleBindings, ClusterRoles, ClusterRoleBindings) are at v1. v1alpha1 support is deprecated and will be removed in a future release. ([#52950](https://github.com/kubernetes/kubernetes/pull/52950),[ @liggitt](https://github.com/liggitt))

### **Cluster Lifecycle**

- Added RBAC reconcile commands with `kubectl auth reconcile -f FILE`. When
  passed a file which contains RBAC roles, rolebindings, clusterroles, or
  clusterrolebindings, this command computes covers and adds the missing rules.
  The logic required to properly apply RBAC permissions is more complicated
  than a JSON merge because you have to compute logical covers operations between

[@caesarxuchao](https://github.com/caesarxuchao))

* Using kubectl gcp auth plugin with a Google Service Account to authenticate to a cluster now additionally requests a token with the  "userinfo.email" scope. This way, users can write ClusterRoleBindings/RoleBindings with the email address of the service account directly. (This is a breaking change if the numeric uniqueIDs of the Google service accounts were being used in RBAC role bindings. The behavior can be overridden by explicitly specifying...

    * Action required: The following clusterrole and clusterrolebinding should be applied:
    ```
         kind: List
         apiVersion: v1
         items:
         - apiVersion: rbac.authorization.k8s.io/v1
           kind: ClusterRole
           metadata:

- `kubectl create clusterrolebinding` creates rbac.authorization.k8s.io/v1 object ([#85889](https://github.com/kubernetes/kubernetes/pull/85889), [@oke-py](https://github.com/oke-py)) [SIG CLI]

    * `kubectl delete node/<nodeName>`
    * or grant self-deletion permission explicitly:
        * `kubectl create clusterrole self-deleting-nodes --verb=delete --resource=nodes`
        * `kubectl create clusterrolebinding self-deleting-nodes --clusterrole=self-deleting-nodes --group=system:nodes`

    * or grant self-deletion permission explicitly:
        * `kubectl create clusterrole self-deleting-nodes --verb=delete --resource=nodes`
        * `kubectl create clusterrolebinding self-deleting-nodes --clusterrole=self-deleting-nodes --group=system:nodes`

  - network_plugin_operations_total
  - network_plugin_operations_errors_total ([#93066](https://github.com/kubernetes/kubernetes/pull/93066), [@AnishShah](https://github.com/AnishShah))

  * Update command invocations to pass separate --from-literal flags for each value

### RBAC

    * Before upgrading, users must ensure their controller manager will enable the csrapproving controller, create an RBAC ClusterRole and ClusterRoleBinding to approve CSRs for the same group, then upgrade. Example roles to enable the equivalent behavior can be found in the [TLS bootstrapping](https://kubernetes.io/docs/admin/kubelet-tls-bootstrapping/) documentation.