* Add validation for CustomResources via JSON Schema. ([#47263](https://github.com/kubernetes/kubernetes/pull/47263), [@nikhita](https://github.com/nikhita))
* enqueue a sync task to wake up jobcontroller to check job ActiveDeadlineSeconds in time ([#48454](https://github.com/kubernetes/kubernetes/pull/48454), [@weiwei04](https://github.com/weiwei04))

- The apiserver debug endpoint `/debug/api_priority_and_fairness/dump_requests` has been extended to dump executing requests as well as queued ones.  A column for StartTime has been added to the returned table, with the queued requests having a StartTime of "0001-01-01T00:00:00Z".  The executing requests have a RequestIndexInQueue of -1, and the QueueIndex is also -1 for priority levels without queues. ([#119009](https://github...

* Add validation for CustomResources via JSON Schema. ([#47263](https://github.com/kubernetes/kubernetes/pull/47263), [@nikhita](https://github.com/nikhita))
* enqueue a sync task to wake up jobcontroller to check job ActiveDeadlineSeconds in time ([#48454](https://github.com/kubernetes/kubernetes/pull/48454), [@weiwei04](https://github.com/weiwei04))

- Kube-proxy exposes a new metric, `kubeproxy_sync_proxy_rules_last_queued_timestamp_seconds`, that indicates the last time a change for kube-proxy was queued to be applied. ([#90175](https://github.com/kubernetes/kubernetes/pull/90175), [@squeed](https://github.com/squeed)) [SIG Instrumentation and Network]

### Alpha

- You can now create a non-preempting Pod priority (NonPreemptingPriority). If set on a class, the pod will continue to be prioritized above queued pods of a lesser class, but will not preempt running pods. ([#74614](https://github.com/kubernetes/kubernetes/pull/74614), [@denkensk](https://github.com/denkensk))

- Introduced new apiserver metric `apiserver_flowcontrol_current_inqueue_seats`. This metric is analogous to `apiserver_flowcontrol_current_inqueue_requests`, but tracks the total number of seats, as each request can take more than one seat. ([#119385](https://github.com/kubernetes/kubernetes/pull/119385), [@andrewsykim](https://github.com/andrewsykim))