- Scheduler Extenders can now be configured in the v1alpha2 component config ([#88768](https://github.com/kubernetes/kubernetes/pull/88768), [@damemi](https://github.com/damemi)) [SIG Release, Scheduling and Testing]

- 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))

- 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]

* DaemonSets [can now be updated by a rolling update](https://kubernetes.io/docs/tasks/manage-daemon/update-daemon-set).

## Action Required

### Certificates API
* Users of the alpha certificates API should delete v1alpha1 CSRs from the API before upgrading and recreate them as v1beta1 CSR after upgrading. ([#39772](https://github.com/kubernetes/kubernetes/pull/39772), [@mikedanese](https://github.com/mikedanese))

### Cluster Autoscaler

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

- Introduced `v1alpha1` API for validating admission policies, enabling extensible admission control via CEL expressions (KEP  3488: CEL for Admission Control). To use, enable the `ValidatingAdmissionPolicy` feature gate and the `admissionregistration.k8s.io/v1alpha1` API via `--runtime-config`. ([#113314](https://github.com/kubernetes/kubernetes/pull/113314), [@cici37](https://github.com/cici37))...

  - PriorityClass resources have been promoted to `scheduling.k8s.io/v1` with no changes. The `scheduling.k8s.io/v1beta1` and `scheduling.k8s.io/v1alpha1` versions are now deprecated and will stop being served by default in v1.17.  ([#73555](https://github.com/kubernetes/kubernetes/pull/73555), [#74465](https://github.com/kubernetes/kubernetes/pull/74465), [@bsalamat](https://github.com/bsalamat))...

- Remove deprecated "include-uninitialized" flag. ([#80337](https://github.com/kubernetes/kubernetes/pull/80337), [@draveness](https://github.com/draveness))

- Kubelet: plugins for dynamic resource allocation may use the `v1alpha3` API instead of v1alpha2 if they want to do prepare/unprepare operations in batches. ([#119012](https://github.com/kubernetes/kubernetes/pull/119012), [@pohly](https://github.com/pohly))

  - PriorityClass resources will no longer be served from `scheduling.k8s.io/v1beta1` and `scheduling.k8s.io/v1alpha1` in v1.17. Migrate use to the `scheduling.k8s.io/v1` API, available since v1.14. Existing persisted data can be retrieved via the `scheduling.k8s.io/v1` API.