- Kubeadm: don't write the kubelet environment file on "upgrade apply" ([#85412](https://github.com/kubernetes/kubernetes/pull/85412), [@boluisa...

- Kubelet metrics gathered through metrics-server or prometheus should no longer timeout for Windows nodes running more than 3 pods. ([#87730](h...

* enable flexvolume on Windows node ([#56921](https://github.com/kubernetes/kubernetes/pull/56921), [@andyzhangx](https://github.com/andyzhangx))
* change default azure file/dir mode to 0755 ([#56551](https://github.com/kubernetes/kubernetes/pull/56551), [@andyzhangx](https://github.com/andyzhangx))

- `RuntimeClass` has been promoted to beta, and is enabled by default. ([#75003](https://github.com/kubernetes/kubernetes/pull/75003), [@tallclair](https://github.com/tallclair))
- New "dry_run" metric label (indicating the value of the dryRun query parameter) has been added into the metrics:
  * apiserver_request_total

- Fixed a bug where cloud-controller-manager initializes nodes multiple times. ([#75405](https://github.com/kubernetes/kubernetes/pull/75405), [@tghartland](https://github.com/tghartland))

### Cluster Lifecycle

* NFS Drivers are now enabled to collect metrics, StatFS metrics provider is used to collect the metrics. ([#75805](https://github.com/kubernetes/kubernetes/pull/75805) , [@brahmaroutu](https://github.com/brahmaroutu)) ([#75805](https://github.com/kubernetes/kubernetes/pull/75805), [@brahmaroutu](https://github.com/brahmaroutu))

- In dual-stack bare-metal clusters, you can now pass dual-stack IPs to `kubelet --node-ip`.
  eg: `kubelet --node-ip 10.1.0.5,fd01::0005`. This is not yet supported for non-bare-metal
  clusters.
  
  In dual-stack clusters where nodes have dual-stack addresses, hostNetwork pods

- Client-go metrics: change bucket distribution for `rest_client_request_duration_seconds` and `rest_client_rate_limiter_duration_seconds` from [0.001, 0.002, 0.004, 0.008, 0.016, 0.032, 0.064, 0.128, 0.256, 0.512] to [0.005, 0.025, 0.1, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0, 15.0, 30.0, 60.0}] ([#106911](https://github.com/kubernetes/kubernetes/pull/106911), [@aojea](https://github.com/aojea))