- The `client.authentication.k8s.io/v1alpha1` ExecCredential has been removed. If you are using a client-go credential plugin that relies on the v1alpha1 API please contact the distributor of your plugin for instructions on how to migrate to the v1 API. ([#108616](https://github.com/kubernetes/kubernetes/pull/108616), [@margocrawf](https://github.com/margocrawf))

* The kubeadm configuration file version has been upgraded from `v1alpha1` to `v1alpha2`. `v1alpha1` read support exists in v1.11, but will be removed in v1.12. ([#63788](https://github.com/kubernetes/kubernetes/pull/63788), [@luxas](https://github.com/luxas))
The following PRs changed the API spec:

  to kubelet config ([#112136](https://github.com/kubernetes/kubernetes/pull/112136), [@pacoxu](https://github.com/pacoxu))
- `resource.k8s.io/v1alpha1` was replaced with `resource.k8s.io/v1alpha2`. Before
  upgrading a cluster, all objects in resource.k8s.io/v1alpha1 (ResourceClaim, ResourceClaimTemplate,
  ResourceClass, PodScheduling) must be deleted. The changes are internal, so

    - [Client Binaries](#client-binaries-20)
    - [Server Binaries](#server-binaries-20)
  - [Changelog since v1.6.0-alpha.1](#changelog-since-v160-alpha1)
    - [Other notable changes](#other-notable-changes-23)
- [v1.6.0-alpha.1](#v160-alpha1)
  - [Downloads for v1.6.0-alpha.1](#downloads-for-v160-alpha1)
    - [Client Binaries](#client-binaries-21)
    - [Server Binaries](#server-binaries-21)
  - [Changelog since v1.5.0](#changelog-since-v150)

- Kubelet's deprecated endpoint `metrics/resource/v1alpha1` has been removed, please adopt to `metrics/resource`. ([#94272](https://github.com/kubernetes/kubernetes/pull/94272), [@RainbowMango](https://github.com/RainbowMango)) [SIG Instrumentation and Node]

- Added support for CEL expressions to `v1alpha1 AuthorizationConfiguration` webhook `matchConditions`. ([#121223](https://github.com/kubernetes/kubernetes/pull/121223), [@ritazh](https://github.com/ritazh))

- The `NodeConfiguration` kind in the kubeadm v1alpha2 API has been renamed `JoinConfiguration` in v1alpha3 ([#65951](https://github.com/kubernetes/kubernetes/pull/65951), [@luxas](https://github.com/luxas)) Courtesy of SIG Cluster Lifecycle

- Storage capacity tracking (= the CSIStorageCapacity feature) graduates to Beta and enabled by default, storage.k8s.io/v1alpha1/VolumeAttachment and storage.k8s.io/v1alpha1/CSIStorageCapacity objects are deprecated ([#99641](https://github.com/kubernetes/kubernetes/pull/99641), [@pohly](https://github.com/pohly))

- Kubeadm: add a new `output/v1alpha2` API that is identical to the `output/v1alpha1`, but attempts to resolve some internal dependencies with the `kubeadm/v1beta2` API. The `output/v1alpha1` API is now deprecated and will be removed in a future release. ([#105295](https://github.com/kubernetes/kubernetes/pull/105295), [@neolit123](https://github.com/neolit123))...

    - [Node Binaries](#node-binaries-23)
  - [Changelog since v1.17.0-alpha.1](#changelog-since-v1170-alpha1)
    - [Action Required](#action-required-3)
    - [Other notable changes](#other-notable-changes-7)
- [v1.17.0-alpha.1](#v1170-alpha1)
  - [Downloads for v1.17.0-alpha.1](#downloads-for-v1170-alpha1)
    - [Client Binaries](#client-binaries-24)
    - [Server Binaries](#server-binaries-24)