evicts pods from nodes in preparation for disruptive operations like kernel
upgrades or maintenance.
     * Custom Metrics for Autoscaling (HorizontalPodAutoscaler API in the Autoscaling
API group): The Horizontal Pod Autoscaling feature now supports custom metrics
(Alpha), allowing you to specify application-level metrics and thresholds to
trigger scaling up and down the number of pods in your application.

* The `autoscaling/v2alpha1` API is now at `autoscaling/v2beta1`. However, the form of the API remains unchanged. Migrate the `HorizontalPodAutoscaler` resources to `autoscaling/v2beta1` to persist the `HorizontalPodAutoscaler` changes introduced in `autoscaling/v2alpha1`. The Horizontal Pod Autoscaler changes include support for status conditions, and autoscaling on memory and custom metrics.

      - [Admission plugin](#admission-plugin)
      - [API Machinery](#api-machinery-1)
      - [Application autoscaling](#application-autoscaling-1)
      - [Application Deployment](#application-deployment-1)
      - [Cluster Autoscaling](#cluster-autoscaling)
      - [Cloud Provider Enhancement](#cloud-provider-enhancement)
      - [Cluster Provisioning](#cluster-provisioning)

    - [RBAC](#rbac)
    - [Scheduling](#scheduling)
    - [Service](#service)
    - [StatefulSet](#statefulset)
    - [Volumes](#volumes)
  - [Notable Features](#notable-features)
    - [Autoscaling](#autoscaling)
    - [DaemonSet](#daemonset)
    - [Deployment](#deployment-1)
    - [Federation](#federation-1)
    - [Internal Storage Layer](#internal-storage-layer-1)
    - [kubeadm](#kubeadm)

### SIG-autoscaling

SIG Autoscaling focused on improving the Horizontal Pod Autoscaling API and algorithm:
- We released autoscaling/v2beta2, which cleans up and unifies the API
- We improved readiness detection and smoothing to work well in a larger variety or use cases

### SIG-Azure

- Kube-apiserver: multiple comma-separated protocols in a single X-Stream-Protocol-Version header are now recognized, in addition to multiple headers, complying with RFC2616 ([#89857](https://github.com/kubernetes/kubernetes/pull/89857),...

### HorizontalPodAutoscaler v2 graduates to GA

Version 2 of the HorizontalPodAutoscaler API graduates to stable in the 1.23 release. The HorizontalPodAutoscaler `autoscaling/v2beta2` API is deprecated in favor of the new `autoscaling/v2` API, which the Kubernetes project recommends for all use cases.

This release does *not* deprecate the v1 HorizontalPodAutoscaler API.

- Made kube-proxy Windows service control manager integration (`--windows-service`) configurable in v1alpha1 component configuration via `windowsRunAsService` field. ([#126072](https://github.com/kubernetes/kubernetes/pull/126072), [@aror...

- Autoscaling/v2beta1 is deprecated in favor of autoscaling/v2beta2 ([#90463](https://github.com/kubernetes/kubernetes/pull/90463), [@deads2k](https://github.com/deads2k)) [SIG Autoscaling]

  - [stable] Enable DNS Horizontal Autoscaling with beta ConfigMap parameters support ([docs](http://kubernetes.io/docs/tasks/administer-cluster/dns-horizontal-autoscaling/))
- **Node**