- Overall, enable the feature of `PreferNominatedNode` will  improve the performance of scheduling where preemption might frequently happen, but in theory, enable the feature of `PreferNominatedNode`, the pod might not be scheduled to the best candidate node...

- The new `dra_resource_claims_in_use` kubelet metrics reported active `ResourceClaims`, overall and by driver. ([#131641](https://github.com/kubernetes/kubernetes/pull/131641), [@pohly](https://github.com/pohly)) [SIG Architecture, Instrumentation, Node and Testing]

   ([#123271](https://github.com/kubernetes/kubernetes/pull/123271), [@neolit123](https://github.com/neolit123))
- kubeadm: improved the overall logic, error handling, and output messages when waiting for the kubelet and API server `/healthz` endpoints to return `OK`. The kubelet and API server checks no longer ran in parallel, but one after another (in serial).

  - If all QueueingHintFn return QueueSkip, it puts this pod back to the unschedulable pod pool
  
  Having appropriate QueueingHintFn contributes to reducing useless retries and thus improves the overall scheduler's performance.
  
  **How can I migrate?**
  
  For backward compatibility, nil `QueueingHintFn` is treated as always returning QueueAfterBackoff. 

### Deployment

Kubernetes now allows users to define the cluster Service CIDR via an API object: ServiceCIDR.

- Added warnings for overlap paths in ConfigMap, Secret, DownwardAPI, Projected. Added warning for cases when ProjectedVolume with sources is provided. ([#121968](https://github.com/kubernetes/kubernetes/pull/121968), [@Peac36](https://github.com/Peac36))

- Allowed the kubelet to pass Windows GMSA credentials down to Docker ([#73726](https://github.com/kubernetes/kubernetes/pull/73726), [@wk8](https://github.com/wk8))
- Added kube-proxy support for overlay networking and DSR in Windows and new flags for `network-name`, `source-vip`, and `enable-dsr`. ([#70896](https://github.com/kubernetes/kubernetes/pull/70896), [@ksubrmnn](https://github.com/ksubrmnn))

- github.com/klauspost/compress: v1.4.1
- github.com/kr/logfmt: b84e30a
- github.com/logrusorgru/aurora: a7b3b31
- github.com/mattn/go-runewidth: v0.0.2
- github.com/mattn/goveralls: v0.0.2
- github.com/mitchellh/go-ps: 4fdf99a
- github.com/mozilla/tls-observatory: 8791a20
- github.com/mwitkow/go-conntrack: cc309e4
- github.com/nbutton23/zxcvbn-go: eafdab6

  * The `ephemeral-storage` resource includes all the disk space a container might consume with container overlay or scratch.

* [alpha] Mount namespace propagation

  * The `VolumeMount.Propagation` field for `VolumeMount` in pod containers is now available.