- The apps/v1beta2 group version adds a Scale subresource for the StatefulSet
kind.

- All kinds in the apps/v1beta2 group version add a corresponding conditions
  kind.

#### Behavioral Changes

 - For all kinds in the API group version, a spec.selector default value is no longer
 available, because it's incompatible with `kubectl

### Apps

The core workloads API, which is composed of the DaemonSet, Deployment, ReplicaSet, and StatefulSet kinds, has been promoted to GA stability in the apps/v1 group version. As such, the apps/v1beta2 group version is deprecated, and all new code should use the kinds in the apps/v1 group version.

### Auth

* `kubectl create rolebinding` and `kubectl create clusterrolebinding` invocations must be updated to  specify multiple subjects as repeated  `--user`, `--group`, or `--serviceaccount` arguments instead of comma-separated arguments to a single `--user`, `--group`, or `--serviceaccount`.  E.g. `--user=x,y` must become `--user x --user y`  ([#43903](https://github.com/kubernetes/kubernetes/pull/43903), [@xilabao](https://github.com/xilabao))

`kubeadm`: a separate "super-admin.conf" file is now deployed. The User in `admin.conf` is now bound to a new RBAC Group `kubeadm:cluster-admins` that has `cluster-admin` `ClusterRole` access. The User in `super-admin.conf` is now bound to the `system:masters` built-in super-powers / break-glass Group that can bypass RBAC. Before this change, the default `admin.conf` was bound to `system:masters` Group, which was undesired. Executing `kubeadm init phase kubeconfig all` or just `kubeadm init` will now generate...

- Upon successful authorization check, an impersonated user is added to the system:authenticated group.
  system:anonymous when impersonated is added to the system:unauthenticated group. ([#94410](https://github.com/kubernetes/kubernetes/pull/94410), [@tkashem](https://github.com/tkashem)) [SIG API Machinery and Testing]

* The `--authorization-rbac-super-user` flag (alpha in 1.5) is deprecated; the `system:masters` group has privileged access ([#38121](https://github.com/kubernetes/kubernetes/pull/38121), [@deads2k](https://github.com/deads2k))

 ([#64792](https://github.com/kubernetes/kubernetes/pull/64792), [@luxas](https://github.com/luxas))

    - `kubectl create clusterrolebinding anonymous-discovery --clusterrole=system:discovery --group=system:unauthenticated`
    - `kubectl create clusterrolebinding anonymous-access-review --clusterrole=system:basic-user --group=system:unauthenticated`

// https://www.iana.org/domains/root/db/gripe.html
gripe

// grocery : Wal-Mart Stores, Inc.
// https://www.iana.org/domains/root/db/grocery.html
grocery

// group : Binky Moon, LLC
// https://www.iana.org/domains/root/db/group.html
group

// gucci : Guccio Gucci S.p.a.
// https://www.iana.org/domains/root/db/gucci.html
gucci

// guge : Charleston Road Registry Inc.

* The `PodSecurityPolicy` API has been moved to the `policy/v1beta1` API group. The `PodSecurityPolicy` API in the `extensions/v1beta1` API group is deprecated and will be removed in a future release. Authorizations for using pod security policy resources should change to reference the `policy` API group after upgrading to 1.11. ([#54933](https://github.com/kubernetes/kubernetes/pull/54933), [@php-coder](https://github.com/php-coder))