* Kubernetes will try to read the openstack auth config from the client config and fall back to read from the environment variables if the auth config is not available. ([#60200](https://github.com/kubernetes/kubernetes/pull/60200), [@dixudx](https://github.com/dixudx))

### SIG Scheduling

- Fix the `cloudprovider_azure_api_request_duration_seconds` metric buckets to correctly capture the latency metrics. Previously, the majority of the calls would fall in the "+Inf" bucket. ([#95375](https://github.com/kubernetes/kubernetes/pull/95375), [@marwanad](https://github.com/marwanad)) [SIG Cloud Provider and Instrumentation]

- Fix the `cloudprovider_azure_api_request_duration_seconds` metric buckets to correctly capture the latency metrics. Previously, the majority of the calls would fall in the "+Inf" bucket. ([#94873](https://github.com/kubernetes/kubernetes/pull/94873), [@marwanad](https://github.com/marwanad)) [SIG Cloud Provider and Instrumentation]

- Upgrade autoscalingv1 to autoscalingv2 in kubectl autoscale cmd, The cmd will attempt to use the autoscaling/v2 API first. If the autoscaling/v2 API is not available or an error occurs, it will fall back to the autoscaling/v1 API. ([#128950](https://github.com/kubernetes/kubernetes/pull/128950), [@googs1025](https://github.com/googs1025)) [SIG Autoscaling and CLI]

  - true/strict - perform validation and error the request on any invalid fields in the ojbect. It will attempt to perform server-side validation if it is enabled on the apiserver, otherwise it will fall back to client-side validation.

* Add pod-level CPU and memory stats from pod cgroup information ([#55969](https://github.com/kubernetes/kubernetes/pull/55969), [@jingxu97](https://github.com/jingxu97))
* kubectl apply use openapi to calculate diff be default. It will fall back to use baked-in types when openapi is not available. ([#51321](https://github.com/kubernetes/kubernetes/pull/51321), [@mengqiy](https://github.com/mengqiy))

however, kubectl v1.21 and older do not support the new API for ephemeral containers.
Users who create ephemeral containers using `kubectl debug` should note that kubectl version 1.22 will attempt to fall back to the old API; older versions of kubectl will not work with cluster versions of 1.22 or later. Please update kubectl to 1.22 if you wish to use `kubectl debug` with a mix of cluster versions.

## Known Issues

  startup/readiness/liveness probe capabilities. Lifecycle handlers configured
  with `scheme: HTTPS` that encounter errors indicating the endpoint is actually
  using HTTP fall back to making the request over HTTP for compatibility with
  previous releases. When this happens, a `LifecycleHTTPFallback` event is recorded
  in the namespace of the pod and a `kubelet_lifecycle_handler_http_fallbacks_total`

- Fix the `cloudprovider_azure_api_request_duration_seconds` metric buckets to correctly capture the latency metrics. Previously, the majority of the calls would fall in the "+Inf" bucket. ([#94943](https://github.com/kubernetes/kubernetes/pull/94943), [@marwanad](https://github.com/marwanad)) [SIG Cloud Provider and Instrumentation]