- [Client Binaries](#client-binaries-26)
    - [Server Binaries](#server-binaries-26)
    - [Node Binaries](#node-binaries-26)
  - [Changelog since v1.17.0](#changelog-since-v1170-1)
    - [Action Required](#action-required)
    - [Other notable changes](#other-notable-changes-1)

<!-- END MUNGE: GENERATED_TOC -->

# v1.18.20


## Downloads for v1.18.20

### Source Code

  is removed in `v1.29`. Migrated `kube-scheduler` configuration files to `kubescheduler.config.k8s.io/v1`.' ([#119994](https://github.com/kubernetes/kubernetes/pull/119994), [@SataQiu](https://github.com/SataQiu))
- A new sleep action for the `PreStop` lifecycle hook was added, allowing containers to pause for a specified duration before termination. ([#119026](https://github.com/kubernetes/kubernetes/pull/119026), [@AxeZhan](https://github.com/AxeZhan))

## Changes by Kind

### Deprecation

- Action-required: kubeadm: graduate the "kubeadm alpha certs" command to a parent command "kubeadm certs". The command "kubeadm alpha certs" is deprecated and will be removed in a future release. Please migrate. ([#94938](https://github.com/kubernetes/kubernetes/pull/94938), [@yagonobre](https://github.com/yagonobre)) [SIG Cluster Lifecycle]

- [`KTIJ-24543`](https://youtrack.jetbrains.com/issue/KTIJ-24543) An option to configure kotlin with JavaScript is available at Tools -> Kotlin menu
- [`KT-57857`](https://youtrack.jetbrains.com/issue/KT-57857) LC: FakeFileForLightClass: Read access is allowed from inside read-action
- [`KTIJ-25172`](https://youtrack.jetbrains.com/issue/KTIJ-25172) Store flexible types in cls

- Suspend Job feature graduated to beta. Added the `action` label to Job controller sync metrics `job_sync_total` and `job_sync_duration_seconds`. ([#102022](https://github.com/kubernetes/kubernetes/pull/102022), [@adtac](https://github.com/adtac))

###  Introduced KMS v2

Introduce KMS v2alpha1 API to add performance, rotation, and observability improvements. Encrypt data at rest (ie Kubernetes `Secrets`) with DEK using AES-GCM instead of AES-CBC for kms data encryption. No user action is required. Reads with AES-GCM and AES-CBC will continue to be allowed. See the guide [Using a KMS provider for data encryption](https://kubernetes.io/docs/tasks/administer-cluster/kms-provider/) for more information.

## Changelog since v1.27.0

## Urgent Upgrade Notes 

### (No, really, you MUST read this before you upgrade)

- Action required for the custom scheduler plugin developers. 
  Here's the breaking change in `EnqueueExtension` in the scheduling framework. 

- 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 InterPodAffinity scheduler plugin arg "ignor...

- Extend the job `job_finished_total metric by new `reason` label and introduce a new job metric to count pod failures
  handled by pod failure policy with respect to the action applied. ([#113324](https://github.com/kubernetes/kubernetes/pull/113324), [@mimowo](https://github.com/mimowo)) [SIG Apps and Testing]

stored in a secret and Zones feature is in use. Zone labels setup moved to KCM component, kubelet skips this step during startup in such case. If credentials stored in cloud-provider config file as plaintext current behaviour does not change and no action required. For proper functioning `kube-system:vsphere-legacy-cloud-provider` should be allowed to update node object if vCenter credentials stored in secret and Zone feature used. ([#101028](https://github.com/kubernetes/kubernetes/pull/101028), ...