- Added new option to the `InterPodAffinity` scheduler plugin to ignore existing
  pods` preferred inter-pod affinities if the incoming pod has no preferred inter-pod
  affinities. This option can be used as an optimization for higher scheduling throughput
  (at the cost of an occasional pod being scheduled non-optimally/violating existing
  pods preferred inter-pod affinities). To enable this scheduler option, set the

  So, if you want to just keep the existing behavior, you can register `ClusterEventWithHint` with no `QueueingHintFn` in it. 
  But, registering appropriate `QueueingHintFn` is, of course, better from a scheduling performance perspective. ([#118551](https://github.com/kubernetes/kubernetes/pull/118551), [@sanposhiho](https://github.com/sanposhiho)) [SIG Node, Scheduling, Storage and Testing]

* fix pdb validation bug on PodDisruptionBudgetSpec ([#48706](https://github.com/kubernetes/kubernetes/pull/48706), [@dixudx](https://github.com/dixudx))
* Revert deprecation of vCenter port in vSphere Cloud Provider. ([#49689](https://github.com/kubernetes/kubernetes/pull/49689), [@divyenpatel](https://github.com/divyenpatel))

- kube-apiserver now reported the following metrics for authorization webhook match conditions: - `apiserver_authorization_match_condition_evaluation_errors_total` counter metric labeled by authorizer type and name - `apiserver_authorization_match_condition_exclusions_total` counter metric labeled by authorizer type and name - `apiserver_authorization_match_condition_evaluation_seconds` histogram metric labeled by authorizer type and name.

  you want to set the equivalent of any of the `--iptables-xxx` options.)
  
  As this code is still very new, it has not been heavily optimized yet;
  while it is expected to _eventually_ have better performance than the
  iptables backend, very little performance testing has been done so far. ([#121046](https://github.com/kubernetes/kubernetes/pull/121046), [@danwinship](https://github.com/danwinship))

- The in-tree cloud provider for OpenStack (and the cinder volume provider) has been removed. Please use the external cloud provider and csi driver from [cloud-provider-openstack](https://github.com/kubernetes/cloud-provider-openstack) instead. ([#67782](https://github.com/kubernetes/kubernetes/pull/67782),...