* `kubectl edit` now edits objects exactly as they were retrieved from the API. This allows using `kubectl edit` with third-party resources and extension API servers. Because client-side conversion is no longer done, the `--output-version` option is deprecated for `kubectl edit`. To edit using a particular API version, fully-qualify the resource, version, and group used to fetch the object (for example,...

- The `system:aggregate-to-edit` role no longer includes write access to the Endpoints API. For new Kubernetes 1.22 clusters, the `edit` and `admin` roles will no longer include that access in newly created Kubernetes 1.22 clusters. This will have no affect on existing clusters upgrading to Kubernetes 1.22. To retain write access to Endpoints in the aggregated `edit` and `admin` roles for newly created 1.22 clusters, refer to https://github.com...

- An alpha flag `--subresource` is added to get, patch, edit replace kubectl commands to fetch and update status and scale subresources. ([#99556](https://github.com/kubernetes/kubernetes/pull/99556), [@nikhita](https://github.com/nikhita))

* Removed comments in json config when using kubectl edit with -o json ([#31685](https://github.com/kubernetes/kubernetes/pull/31685), [@jellonek](https://github.com/jellonek))

 - Kubeadm now respects user specified etcd versions in the ClusterConfiguration and properly uses them. If users do not want to stick to the version specified in the ClusterConfiguration, they should edit the kubeadm-config config map and delete it. ([#89588](https://github.com/kubernetes/kubernetes/pull/89588), [@rosti](https://github.com/rosti)) [SIG Cluster Lifecycle]

For example, a plugin that implements Score and Filter extensions can be simultaneously enabled for both.
This means entire plugins can be enabled and disabled without having to manually edit individual extension point settings.
These extension points can now be abstracted away due to their irrelevance for most users.

### CSI Migration updates

* Drain pods created from ReplicaSets in 'kubectl drain' ([#23689](https://github.com/kubernetes/kubernetes/pull/23689), [@maclof](https://github.com/maclof))
* Make kubectl edit not convert GV on edits ([#23437](https://github.com/kubernetes/kubernetes/pull/23437), [@DirectXMan12](https://github.com/DirectXMan12))

Kubernetes installation, upgrade and configuration even more robust has been a major focus for this cycle for SIG Cluster Lifecycle (see the May 6, 2019 [Community Update](https://docs.google.com/presentation/d/1QUOsQxfEfHlMq4lPjlK2ewQHsr9peEKymDw5_XwZm8Q/edit?usp=sharing)). Bug fixes across bare metal tooling and production-ready user stories, such as the high availability use cases have been given priority for 1.15.

kubeadm, the cluster lifecycle building block, continues to receive features...

* Removed comments in json config when using kubectl edit with -o json ([#31685](https://github.com/kubernetes/kubernetes/pull/31685), [@jellonek](https://github.com/jellonek))

    * Add `kubectl apply edit-last-applied` subcommand ([#42256](https://github.com/kubernetes/kubernetes/pull/42256), [@shiywang](https://github.com/shiywang))

  * Strategic Merge Patch

    * Reference docs now display the patch type and patch merge key used by `kubectl apply` to merge and identify unique elements in arrays.