* kube-scheduler has been fixed to use `--leader-elect` option back to true (as it was in previous versions) ([#59732](https://github.com/kubernetes/kubernetes/pull/59732), [@dims](https://github.com/dims))

   * the default config file is "e2e.yaml/toml/json/..." and the test starts when no such config is found (as before) but if -viper-config is used, the config file must exist
   * -viper-config can be used to select a file with full path, with or without file suffix
   * the csiImageVersion/Registry flags were renamed to storage.csi.imageVersion/Registry

- To address the possibility of dry-run requests overwhelming admission webhooks...

- The deprecated flag `--lock-object-namespace` and `--lock-object-name` have been removed from kube-scheduler. Please use `--leader-elect-resource-namespace` and `--leader-elect-resource-name` or ComponentConfig instead to configure those parameters. ([#119130](https://github.com/kubernetes/kubernetes/pull/119130), [@SataQiu](https://github.com/SataQiu)) [SIG Scheduling]

HorizontalPodAutoscaler added a `spec.behavior` field that allows scale behavior to be configured. Behaviors are specified separately for scaling up and down. In each direction a stabilization window can be specified as well as a list of policies and how to select amongst them. Policies can limit the absolute number of pods added or removed, or the percentage of pods added or removed. ([#74525](https://github.com/kubernetes/kubernetes/pull/74525), [@gliush](https://github.com/gliush)) [SIG API Machinery, Apps,...

* Fix garbage collection and resource quota when the controller-manager uses --leader-elect=false ([#57340](https://github.com/kubernetes/kubernetes/pull/57340), [@jmcmeek](https://github.com/jmcmeek))

* kubectl port-forward now allows using resource name (e.g., deployment/www) to select a matching pod, as well as the use of --pod-running-timeout to wait until at least one pod is running. ([#59705](https://github.com/kubernetes/kubernetes/pull/59705), [@phsiao](https://github.com/phsiao))

*   The RBAC bootstrapping policy now allows authenticated users to create selfsubjectrulesreviews. ([#56095](https://github.com/kubernetes/kubernetes/pull/56095),[ @ericchiang](https://github.com/ericchiang))
*   RBAC ClusterRoles can now select other roles to aggregate. ([#54005](https://github.com/kubernetes/kubernetes/pull/54005),[ @deads2k](https://github.com/deads2k))

- The PodDisruptionBudget API has been promoted to policy/v1 with no schema changes. The only functional change is that an empty selector (`{}`) written to a policy/v1 PodDisruptionBudget now selects all pods in the namespace. The behavior of the policy/v1beta1 API remains unchanged. The policy/v1beta1 PodDisruptionBudget API is deprecated and will no longer be served in 1.25+. ([#99290](https://github.com/kubernetes/kubernetes/pull/99290), [...

* Update PodAntiAffinity to ignore calls to subresources ([#35608](https://github.com/kubernetes/kubernetes/pull/35608), [@soltysh](https://github.com/soltysh))
* The apiserver can now select which type of kubelet-reported address to use for apiserver->node communications, using the --kubelet-preferred-address-types flag. ([#35497](https://github.com/kubernetes/kubernetes/pull/35497), [@liggitt](https://github.com/liggitt))