*   `kubectl create pdb` no longer sets the min-available field by default. ([#53047](https://github.com/kubernetes/kubernetes/pull/53047),[ @yuexiao-wang](https://github.com/yuexiao-wang))
*   The canonical pronunciation of kubectl is "cube control".

- The DownwardAPIHugePages feature is beta.  Users may use the feature if all workers in their cluster are min 1.20 version.  The feature will be enabled by default in all installations in 1.22. ([#99610](https://github.com/kubernetes/kubernetes/pull/99610), [@derekwaynecarr](https://github.com/derekwaynecarr)) [SIG Node]

## Dependencies

* Fixes bug finding master replicas in GCE when running multiple Kubernetes clusters. ([#58561](https://github.com/kubernetes/kubernetes/pull/58561), [@jesseshieh](https://github.com/jesseshieh))

* --tls-min-version on kubelet and kube-apiserver allow for configuring minimum TLS versions ([#58528](https://github.com/kubernetes/kubernetes/pull/58528), [@deads2k](https://github.com/deads2k))

- Update kube-apiserver's priority & fairness work estimator such that 'max seats' is MIN(0.15 x nominalCL, nominalCL / handSize)
  

- Updated kube-apiserver's priority & fairness work estimator such that 'max seats' is MIN(0.15 x nominalCL, nominalCL / handSize)
  

  After the connection closed(received GOAWAY), the client's other in-flight requests won't be affected, and the client will reconnect. 
  The flag min value is 0 (off), max is .02 (1/50 requests); .001 (1/1000) is a recommended starting point.

* Controller changes for perma failed deployments ([#35691](https://github.com/kubernetes/kubernetes/pull/35691), [@kargakis](https://github.com/kargakis))
* Proxy min sync period ([#35334](https://github.com/kubernetes/kubernetes/pull/35334), [@timothysc](https://github.com/timothysc))

  - apiserver_flowcontrol_current_r: R(the time of the last change in state of the queues)
  - apiserver_flowcontrol_dispatch_r: R(the time of the latest request dispatch)
  - apiserver_flowcontrol_latest_s: S(the request last dispatched) = R(when that request starts executing in the virtual world)
  - apiserver_flowcontrol_next_s_bounds: min and max next S among non-empty queues

- CRD `x-kubernetes-validations` rules now support the CEL functions: `isSorted`, `sum`, `min`, `max`, `indexOf`, `lastIndexOf`, `find` and `findAll`. ([#108312](https://github.com/kubernetes/kubernetes/pull/108312), [@jpbetz](https://github.com/jpbetz))

### Failing Test

- Kube-proxy iptables min-sync-period defaults to 1 sec. Previously, it was 0. ([#92836](https://github.com/kubernetes/kubernetes/pull/92836), [@aojea](https://github.com/aojea)) [SIG Network]

### Bug or Regression