## Changes by Kind

### API Change

- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  

* Implementers of the cloud provider interface will note the addition of a context to this interface. Trivial code modification will be necessary for a cloud provider to continue to compile. ([#59287](https://github.com/kubernetes/kubernetes/pull/59287), [@cheftako](https://github.com/cheftako))
* /release-note-none ([#58264](https://github.com/kubernetes/kubernetes/pull/58264), [@WanLinghao](https://github.com/WanLinghao))

* **[Pod priority and preemption](https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/) is now enabled by default.** Note that this means that pods from *any* namespace can now request priority classes that compete with and/or cause preemption of critical system pods that are already running. If that is not desired, disable the PodPriority feature by setting `--featu...

  * You can remove the "old" taints (stored internally as annotations) at any time after the upgrade by doing `kubectl annotate nodes <node name> scheduler.alpha.kubernetes.io/taints-` (note the minus at the end, which means "delete the taint with this key")

    - [Feature](#feature-8)
    - [Design](#design-1)
    - [Other (Bug, Cleanup or Flake)](#other-bug-cleanup-or-flake-5)
- [v1.18.0-alpha.4](#v1180-alpha4)
  - [Important note about manual tag](#important-note-about-manual-tag)
- [v1.18.0-alpha.3](#v1180-alpha3)
  - [Downloads for v1.18.0-alpha.3](#downloads-for-v1180-alpha3)
    - [Client Binaries](#client-binaries-24)
    - [Server Binaries](#server-binaries-24)

- The example API server has renamed its `wardle.k8s.io` API group to `wardle.example.com` ([#81670](https://github.com/kubernetes/kubernetes/pull/81670), [@liggitt](https://github.com/liggitt))
- CRDs defaulting is promoted to GA. Note: the feature gate CustomResourceDefaulting will be removed in 1.18. ([#84713](https://github.com/kubernetes/kubernetes/pull/84713), [@sttts](https://github.com/sttts))

    * A sample DaemonSet to deploy Flexvolume drivers is now available.

* [prototype] Volume snapshots

  * You can now create a volume snapshot by calling the Kubernetes API.

  * Note that the prototype does not support quiescing before snapshot, so snapshots might be inconsistent.

  In addition, when this feature is enabled, the 'details' field of 'Status' from the LIST response
  includes information that identifies the corrupt object(s).
  NOTE: unsafe deletion ignores finalizer constraints, and skips precondition checks.
  WARNING: this may break the workload associated with the resource being unsafe-deleted, if it relies on

specified in the service account's secrets field. Kubernetes clusters are only affected if the ServiceAccount admission plugin and the `kubernetes.io/enforce-mountable-secrets` annotation are used together with ephemeral containers.

**Note**: This only impacts the cluster if the ServiceAccount admission plugin is used (most cluster should have this on by default as recommended in https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/#serviceaccount), the `kub...

    *   If you upgrade your client-go libs and use the `AppsV1()` interface, please note that the default garbage collection behavior is changed.

### **Auth**

#### **Audit**