Multi vCenter support is deprecated as of v1.21. If you have a Kubernetes cluster spanning across multiple vCenter servers, please consider moving all k8s nodes to a single vCenter Server. vSphere CSI Driver does not support Kubernetes deployment spanning across multiple vCenter servers.
  

* Sharing a PID namespace between containers in a pod is disabled by default in 1.8. To enable for a node, use the --docker-disable-shared-pid=false kubelet flag. Note that PID namespace sharing requires docker >= 1.13.1. ([#51634](https://github.com/kubernetes/kubernetes/pull/51634), [@verb](https://github.com/verb))

- `APIServerTracing` feature gate is now enabled by default. Tracing in the API
  Server is still disabled by default, and requires a config file to enable. ([#116144](https://github.com/kubernetes/kubernetes/pull/116144), [@dashpole](https://github.com/dashpole))

- The NodeShutdown taint is now supported for Azure. ([#68033](https://github.com/kubernetes/kubernetes/pull/68033), [@yastij](https://github.com/yastij))

### SIG CLI

  * OOM parser uses kmsg
  * Add hugepages support
  * Add CRI-O support

* Sharing a PID namespace between containers in a pod is disabled by default in version 1.8. To enable for a node, use the `--docker-disable-shared-pid=false` kubelet flag. Be aware that PID namespace sharing requires Docker version greater than or equal to 1.13.1.

* Fix issues related to the eviction manager.

### Bug or Regression

- Fixes CSI volume attachment scaling issue by using informers. ([#91307](https://github.com/kubernetes/kubernetes/pull/91307), [@yuga711](https://github.com/yuga711)) [SIG API Machinery, Apps, Node, Storage and Testing]

### Other (Cleanup or Flake)

- Kubeadm: change the default image repository for CI images from 'gcr.io/kubernetes-ci-images' to 'gcr.io/k8s-staging-ci-images' ([#97087](https://github.com/kubernetes/kubernetes/pull/97087), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

## Dependencies

### Added
_Nothing has changed._

### Changed

- New staging repo has been created for the `EndpointSlice` reconciler. ([#118953](https://github.com/kubernetes/kubernetes/pull/118953), [@mskrocki](https://github.com/mskrocki))

* Moved staging/src/k8s.io/client-go/tools/bootstrap to staging/src/k8s… ([#67356](https://github.com/kubernetes/kubernetes/pull/67356), [@yliaog](https://github.com/yliaog))

* Removed unsafe double RLock in cpumanager ([#62464](https://github.com/kubernetes/kubernetes/pull/62464), [@choury](https://github.com/choury))

## Non-user-facing changes