- Fixed admission metrics in seconds. ([#72343](https://github.com/kubernetes/kubernetes/pull/72343), [@danielqsj](https://github.com/danielqsj))
- When a watch is closed by an HTTP2 load balancer and we are told to go away, skip printing the message to stderr by default.

	* Add namespace-{list, create, delete} actions to the kubernetes-master layer ([#44277](https://github.com/kubernetes/kubernetes/pull/44277), [@jacekn](https://github.com/jacekn))

	* Using http2 in kubeapi-load-balancer to fix `kubectl exec` uses ([#43625](https://github.com/kubernetes/kubernetes/pull/43625), [@mbruzek](https://github.com/mbruzek))

* A buffered audit backend can be used with other audit backends. ([#60076](https://github.com/kubernetes/kubernetes/pull/60076), [@crassirostris](https://github.com/crassirostris))

* Introduced `--http2-max-streams-per-connection` command line flag on api-servers and set default to 1000 for aggregated API servers. ([#60054](https://github.com/kubernetes/kubernetes/pull/60054), [@MikeSpreitzer](https://github.com/MikeSpreitzer))

- Kube-apiserver: Added support to disable http/2 serving with a `--disable-http2-serving` flag.
   ([#122176](https://github.com/kubernetes/kubernetes/pull/122176), [@slashpai](https://github.com/slashpai)) [SIG API Machinery]

- The kubelet no longer forcefully closes active connections on heartbeat failures, using the HTTP2 health check mechanism to detect broken connections. Users can force the previous behavior of the kubelet by setting the environment variable DISABLE_HTTP2. ([#108107](https://github.com/kubernetes/kubernetes/pull/108107), [@aojea](https://github.com/aojea))...

* GCE: Bump GLBC version to 1.1.0 - supporting multiple certificates and HTTP2 ([#62427](https://github.com/kubernetes/kubernetes/pull/62427), [@nicksardo](https://github.com/nicksardo))

* Fixed missing error checking that could cause kubelet to crash in a race condition. ([#60962](https://github.com/kubernetes/kubernetes/pull/60962), [@technicianted](https://github.com/technicianted))
* Introduced `--http2-max-streams-per-connection` command line flag on api-servers and set default to 1000 for aggregated API servers. ([#60054](https://github.com/kubernetes/kubernetes/pull/60054), [@MikeSpreitzer](https://github.com/MikeSpreitzer))

* Fix panic create/update CRD when mutating/validating webhook configured. ([#61404](https://github.com/kubernetes/kubernetes/pull/61404), [@hzxuzhonghu](https://github.com/hzxuzhonghu))
* Introduced `--http2-max-streams-per-connection` command line flag on api-servers and set default to 1000 for aggregated API servers. ([#60054](https://github.com/kubernetes/kubernetes/pull/60054), [@MikeSpreitzer](https://github.com/MikeSpreitzer))