- [Changes](#changes)
  - [What’s New (Major Themes)](#whats-new-major-themes)
    - [Cloud Provider Labels reach General Availability](#cloud-provider-labels-reach-general-availability)
    - [Volume Snapshot Moves to Beta](#volume-snapshot-moves-to-beta)
    - [CSI Migration Beta](#csi-migration-beta)
  - [Known Issues](#known-issues)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes-1)

    - [Node Binaries](#node-binaries-19)
  - [Changelog since v1.17.0](#changelog-since-v1170)
  - [What’s New (Major Themes)](#whats-new-major-themes)
    - [Kubernetes Topology Manager Moves to Beta - Align Up!](#kubernetes-topology-manager-moves-to-beta---align-up)
    - [Serverside Apply - Beta 2](#serverside-apply---beta-2)

- Kubernetes v1.13 moves support for Container Storage Interface to GA. As part of this move Kubernetes now supports CSI v1.0.0 and deprecates support for CSI 0.3 and older releases. Older CSI drivers must be updated to CSI 1.0 and moved to the new kubelet plugin registration directory in order to work with Kubernetes 1.15+. ([#71020](https://github.com/kubernetes/kubernetes/pull/71020),...

- kube-proxy no longer automatically cleans up network rules created by running kube-proxy in other modes. If you are switching the kube-proxy mode (EG: iptables to IPVS), you will need to run `kube-proxy --cleanup`, or restart the worker node (recommended) before restarting kube-proxy. If you are not switching kube-proxy between different modes, this change should not require any action. ([#76109](https://github.com/kubernetes/kubernetes/pull/76109), [@vllry](https://github.com/vllry))...

- Kube-apiserver: added support for compressing rotated audit log files with `--audit-log-compress` ([#94066](https://github.com/kubernetes/kubernetes/pull/94066), [@lojies](https://github.com/lojies)) [SIG API Machinery and Auth]

Storage also worked on a number of [Container Storage Interface (CSI) features](https://github.com/kubernetes/enhancements/issues/178) this quarter in anticipation of moving support for CSI from beta to GA in the next Kubernetes release. This includes graduating the dependent “mount namespace propagation” feature to GA, moving the Kubelet plugin registration mechanism to beta, adding alpha support for a new CSI driver registry as well as for topology, and adding a number of alpha features to support the...

- Introduced API type `coordination.k8s.io/v1beta1/LeaseCandidate`
  `CoordinatedLeaderElection` feature moves to Beta ([#130751](https://github.com/kubernetes/kubernetes/pull/130751), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery, Etcd and Testing]

    * DualStack:
    * => IPv4 BackendPool name == clusterName
    * => IPv6 BackendPool name == <clusterName>-IPv6
    * This result into:
    * - clusters moving from IPv4 to duakstack will require no changes
    * - clusters moving from IPv6 (while not seen in the wild, we can not rule out their existence) to dualstack will require deleting backend pools (the reconciler will take care of creating correct backendpools)

has been working on for a few releases. The goal is to move in-tree volume plugins to out-of-tree CSI drivers and eventually remove the in-tree volume plugins. The [core CSI Migration](https://github.com/kubernetes/enhancements/tree/master/keps/sig-storage/625-csi-migration) feature moved to GA. CSI Migration for GCE PD and AWS EBS also moved to GA. CSI Migration for vSphere remains in beta (but is on by default). CSI Migration for Portworx moved to Beta (but is off-by-default).


###...

- Fixes an issue calculating total CPU usage reported for Windows nodes ([#122999](https://github.com/kubernetes/kubernetes/pull/122999), [@marosset](https://github.com/marosset)) [SIG Node and Windows]
- Prevent watch cache starvation by moving its watch to separate RPC and add a SeparateCacheWatchRPC feature flag to disable this behavior ([#123693](https://github.com/kubernetes/kubernetes/pull/123693), [@mengqiy](https://github.com/mengqiy)) [SIG API Machinery]