- Add `plugin_execution_duration_seconds` metric for scheduler framework plugins. ([#84522](https://github.com/kubernetes/kubernetes/pull/84522), [@liu-cong](https://github.com/liu-cong))
- Add `permit_wait_duration_seconds` metric to the scheduler. ([#84011](https://github.com/kubernetes/kubernetes/pull/84011), [@liu-cong](https://github.com/liu-cong))

### Deprecated/changed metrics

* Kubelet: Periodically reporting image pulling progress in log ([#26145](https://github.com/kubernetes/kubernetes/pull/26145), [@Random-Liu](https://github.com/Random-Liu))

* Fix `RunAsGroup` which doesn't work since 1.10. ([#65926](https://github.com/kubernetes/kubernetes/pull/65926), [@Random-Liu](https://github.com/Random-Liu))
* Fix a bug that preempting a pod may block forever. ([#65987](https://github.com/kubernetes/kubernetes/pull/65987), [@Random-Liu](https://github.com/Random-Liu))

    * Update kubectl to v1.10.7.
* Support extra `--prune-whitelist` resources in kube-addon-manager. ([#67743](https://github.com/kubernetes/kubernetes/pull/67743), [@Random-Liu](https://github.com/Random-Liu))

- Migrated the noderesources scheduler plugin to use [contextual logging](https://k8s.io/docs/concepts/cluster-administration/system-logs/#contextual-logging). ([#116748](https://github.com/kubernetes/kubernetes/pull/116748), [@mengjiao-liu](https://github.com/mengjiao-liu))

- Migrated the defaultbinder scheduler plugin to use [contextual logging](https://k8s.io/docs/concepts/cluster-administration/system-logs/#contextual-logging). ([#116571](https://github.com/kubernetes/kubernetes/pull/116571), [@mengjiao-liu](https://github.com/mengjiao-liu)) [SIG Instrumentation and Scheduling]

- Changed CRI pod log directory from `/var/log/pods/UID` to `/var/log/pods/NAMESPACE_NAME_UID`. ([#74441](https://github.com/kubernetes/kubernetes/pull/74441), [@Random-Liu](https://github.com/Random-Liu))

- Kubernetes now supports extra `--prune-whitelist` resources in kube-addon-manager. ([#67743](https://github.com/kubernetes/kubernetes/pull/67743), [@Random-Liu](https://github.com/Random-Liu))
- Graduate Resource Quota ScopeSelectors to beta, and enable it by default. ([#67077](https://github.com/kubernetes/kubernetes/pull/67077), [@vikaschoudhary16](https://github.com/vikaschoudhary16))

srinivasan.narayanamoorthy, Sumesh Udayakumaran, Sungmann Cho, Tae-Hwan Jung,
Taehoon Lee, Takeshi Watanabe, TengLu, terryky, TheMindVirus, ThisIsIsaac, Till
Hoffmann, Timothy Liu, Tomer Gafner, Tongxuan Liu, Trent Lo, Trevor Morris, Uday
Bondhugula, Vasileios Lioutas, vbvg2008, Vishnuvardhan Janapati, Vivek
Suryamurthy, Wei Wang, Wen-Heng (Jack) Chung, wenxizhu, William D. Irons,

- Kubernetes is now built with Golang 1.17.2 ([#105563](https://github.com/kubernetes/kubernetes/pull/105563), [@mengjiao-liu](https://github.com/mengjiao-liu))