- Kube-apiserver can now specify `--authentication-token-webhook-version=v1` or `--authorization-webhook-version=v1` to use `v1` TokenReview and SubjectAccessReview API objects when communicating with authentication and authorization webhooks. ([#84768](https://github.com/kubernetes/kubernetes/pull/84768), [@liggitt](https://github.com/liggitt))

  - Promoted the `ServiceAccountTokenPodNodeInfo` feature to GA, which adds the node name and uid as claims into service account tokens mounted into running pods, and embeds that information as `authentication.kubernetes.io/node-name` and `authentication.kubernetes.io/node-uid` user extra info when the token is used

### API Change

- '`kube-apiserver`: adds `--authentication-config` flag for reading `AuthenticationConfiguration`
  files. `--authentication-config` flag is mutually exclusive with the existing `--oidc-*`
  flags.' ([#119142](https://github.com/kubernetes/kubernetes/pull/119142), [@aramase](https://github.com/aramase))

- Structured Authentication Configuration now supports configuring multiple JWT authenticators. The maximum allowed JWT authenticators in the authentication configuration is 64. ([#123431](https://github.com/kubernetes/kubernetes/pull/123431), [@aramase](https://github.com/aramase))

to the kubelet that allows it to track container images and the list of authentication information that leads to their successful pulls. This data is persisted across reboots of the host and restarts of the kubelet.
  
  The kubelet ensures any image requiring credential verification is always pulled if authentication information from an image pull is not yet present, thus enforcing authentication / re-authentication. This means an image pull might be attempted even in cases where a pod...

- Fix bug to prevent allocation of existing floating IP.
- Fix Cinder authentication bug when OS_DOMAIN_NAME not specified.
- Fix Keystone authentication errors by skipping synchronization for unscoped tokens.
- Fix authentication error for client-auth-plugin
- Fix dependency references from in-tree-provider to point to external provider.
- Add shutdown instance by Provider ID.

- Graduated configurable endpoints for anonymous authentication using the authentication configuration file to stable. ([#131654](https://github.com/kubernetes/kubernetes/pull/131654), [@vinayakankugoyal](https://github.com/vinayakankugoyal)) [SIG API Machinery and Testing]

  - `--address`
  The insecure port flags `--port` may only be set to 0 now.
  
  In addtion, please be careful that:
  - controller-manager MUST start with `--authorization-kubeconfig` and `--authentication-kubeconfig` correctly set to get authentication/authorization working.
  - liveness/readiness probes to controller-manager MUST use HTTPS now, and the default port has been changed to 10257.

    - [kubeadm](#kubeadm-1)
    - [Other Deprecations](#other-deprecations)
  - [Changes to API Resources](#changes-to-api-resources)
    - [ABAC](#abac)
    - [Admission Control](#admission-control)
    - [Authentication](#authentication)
    - [Authorization](#authorization)
    - [Autoscaling](#autoscaling-1)
    - [Certificates](#certificates)
    - [ConfigMap](#configmap)
    - [CronJob](#cronjob)
    - [DaemonSet](#daemonset-1)

- Kubectl azure authentication: fixed a regression in 1.18.0 where "spn:" prefix was unexpectedly added to the `apiserver-id` configuration in the kubeconfig file ([#89706](https://github.com/kubernetes/kubernetes/pull/89706), [@weinong](https://github.com/weinong)) [SIG API...