### VMware

- SAML token delegation (required for Zones support in vSphere) is now supported ([#78876](https://github.com/kubernetes/kubernetes/pull/78876), [@dougm](https://github.com/dougm))
- vSphere SAML token auth is now supported when using Zones ([#75515](https://github.com/kubernetes/kubernetes/pull/75515), [@dougm](https://github.com/dougm))

* `--service-account-lookup` now defaults to true, requiring the Secret API object containing the token to exist in order for a service account token to be valid. This enables service account tokens to be revoked by deleting the Secret object containing the token. ([#44071](https://github.com/kubernetes/kubernetes/pull/44071), [@liggitt](https://github.com/liggitt))

* Fix for kube-proxy healthcheck handling an update that simultaneously removes one port and adds another. ([#44365](https://github.com/kubernetes/kubernetes/pull/44365), [@MrHohn](https://github.com/MrHohn))
* Fix [broken service accounts when using dedicated service account key](https://github.com/kubernetes/kubernetes/issues/44285). ([#44169](https://github.com/kubernetes/kubernetes/pull/44169), [@mikedanese](https://github.com/mikedanese))

unprivileged pods, using the proxy to perform privileged storage operations on the node.

Another feature moving to GA in v1.22 is CSI Service Account Token support. This feature allows CSI drivers to use pods' [bound service account tokens](https://kubernetes.io/docs/reference/access-authn-authz/service-accounts-admin/#bound-service-account-token-volume) instead of a more privileged identity. It also provides control over to re-publishing these volumes, so that short-lived tokens can be refreshed....

ServiceAccount. Use the [TokenRequest](https://kubernetes.io/docs/reference/kubernetes-api/authentication-resources/token-request-v1/) API to acquire service account tokens, or if a non-expiring token is required, create a Secret API object for the token controller to populate with a service account token by following this [guide](https://kubernetes.io/docs/concepts/configuration/secret/#service-account-token-secrets). ([#108309](https://github.com/kubernetes/kubernetes/pull/108309), [@zshihang](https://github.com/zshihang))...

 - The default Bootstrap Token created with `kubeadm init` v1.8 expires
 and is deleted after 24 hours by default to limit the exposure of the
 valuable credential. You can create a new Bootstrap Token with
 `kubeadm token create` or make the default token permanently valid by specifying
 `--token-ttl 0` to `kubeadm init`. The default token can later be deleted with
 `kubeadm token delete`.

		SetKeepAlive(args.KeepAlive).
		SetTLSConfig(&tls.Config{RootCAs: args.RootCAs}).
		AddBroker(args.Broker.String())

	target.client = mqtt.NewClient(options)

	token := target.client.Connect()
	ok := token.WaitTimeout(reconnectInterval)
	if !ok {
		return store.ErrNotConnected
	}
	if token.Error() != nil {
		return token.Error()
	}

	yes, err := target.isActive()
	if err != nil {
		return err
	}

`kube-controller-manager`: The `LegacyServiceAccountTokenCleanUp` feature gate is now `beta` and enabled by default. When enabled, legacy auto-generated service account token secrets are auto-labeled with a `kubernetes.io/legacy-token-invalid-since` label if the credentials have not been used in the time specified by `--legacy-service-account-token-clean-up-period` (defaulting to one year), **and** are referenced from the `.secrets` list of a ServiceAccount object, **and**  are not referenced from pods. This...

### **Cluster Lifecycle**

*   You must either specify the `--discovery-token-ca-cert-hash` flag to `kubeadm join`, or opt out of the CA pinning feature using `--discovery-token-unsafe-skip-ca-verification`.
*   The default `auto-detect` behavior of the kubelet's `--cloud-provider` flag is removed.

- Fix kubelet token cache returning stale tokens when service accounts are recreated with the same name. The token cache is now UID-aware and the new `TokenRequestServiceAccountUIDValidation` feature gate (Beta, enabled by default) validates the TokenRequest UID when set matches the service account UID. ([#132803...