- Scheduler Policy API has a new recommended apiVersion `apiVersion: kubescheduler.config.k8s.io/v1` which is consistent with the scheduler API group `kubescheduler.config.k8s.io`. It holds the same API as the old apiVersion `apiVersion: v1`. ([#83578](https://github.com/kubernetes/kubernetes/pull/83578), [@Huang-Wei](https://github.com/Huang-Wei))

KubeProxyConfiguration Before:

```
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
**featureGates: "SupportIPVSProxyMode=true"**
```

KubeProxyConfiguration After:

```
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
**featureGates:**
**  SupportIPVSProxyMode: true**

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

* event object references with apiversion will now report an apiversion. ([#63913](https://github.com/kubernetes/kubernetes/pull/63913), [@deads2k](https://github.com/deads2k))

- kube-scheduler dropped support for configuration files with apiVersion `componentconfig/v1alpha1`. Ensure kube-scheduler is configured using command-line flags or a configuration file with apiVersion `kubescheduler.config.k8s.io/v1alpha1` before upgrading to 1.13.
- kubectl

*   The API group/version for the kube-proxy configuration has changed from `componentconfig/v1alpha1` to `kubeproxy.config.k8s.io/v1alpha1`. If you are using a config file for kube-proxy instead of the command line flags, you must change its apiVersion to `kubeproxy.config.k8s.io/v1alpha1`. ([#53645](https://github.com/kubernetes/kubernetes/pull/53645), [@xiangpengzhao](https://github.com/xiangpengzhao))

### API Change

- Change the APIVersion proto name of BoundObjectRef from aPIVersion to apiVersion. ([#97379](https://github.com/kubernetes/kubernetes/pull/97379), [@kebe7jun](https://github.com/kebe7jun)) [SIG Auth]
- Promote Immutable Secrets/ConfigMaps feature to Stable.

  ResourceClass, PodScheduling) must be deleted. The changes are internal, so
  YAML files which create pods and resource claims don't need changes except for
  the newer `apiVersion`. ([#116299](https://github.com/kubernetes/kubernetes/pull/116299), [@pohly](https://github.com/pohly))

  * The audit log file defaults to JSON encoding when using the advanced auditing feature gate.
  * An audit policy file without either an `apiVersion` or a `kind` field may be treated as invalid.
  * The webhook and log file now output the `v1beta1` event format.

- Fix `kubectl drain ignore` daemonsets and others. ([#87361](https://github.com/kubernetes/kubernetes/pull/87361), [@zhouya0](https://github.com/zhouya0)) [SIG CLI]
- Fix missing "apiVersion" for "involvedObject" in Events for Nodes. ([#87537](https://github.com/kubernetes/kubernetes/pull/87537), [@uthark](https://github.com/uthark)) [SIG Apps and Node]