- 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.

*   `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)
  

    * When turning on cluster autoscaler by setting KUBE_ENABLE_NODE_AUTOSCALER=true,KUBE_AUTOSCALER_MIN_NODES and KUBE_AUTOSCALER_MAX_NODES need to be set.
* systemd node spec proposal ([#17688](https://github.com/kubernetes/kubernetes/pull/17688), [@derekwaynecarr](https://github.com/derekwaynecarr))

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

  This issue only could happen if you use custom plugins or if you change plugin set being used in your scheduler via the scheduler config. ([#122013](https://github.com/kubernetes/k...

#### Network

- The deprecated flag `--conntrack-max` has been removed from kube-proxy. Users of this flag should switch to `--conntrack-min` and `--conntrack-max-per-core` instead. ([#78399](https://github.com/kubernetes/kubernetes/pull/78399), [@rikatz](https://github.com/rikatz))