* Free up CPU and memory requested but unused by Metrics Server Pod Nanny. ([#57252](https://github.com/kubernetes/kubernetes/pull/57252), [@kawych](https://github.com/kawych))

- Fixes an issue where the vsphere cloud provider will not trust a certificate if:
  - The issuer of the certificate is unknown (x509.UnknownAuthorityError)
  - The requested name does not match the set of authorized names (x509.HostnameError)

   ([#121954](https://github.com/kubernetes/kubernetes/pull/121954), [@AxeZhan](https://github.com/AxeZhan))
- The watch cache now waits until it is at least as fresh as the given requestedWatchRV if sendInitialEvents was requested.
   ([#122830](https://github.com/kubernetes/kubernetes/pull/122830), [@p0lyn0mial](https://github.com/p0lyn0mial))

	// expected error the part number marker use in the ListObjectParts request is invalid.
	invalidPartMarkerErr := getAPIError(ErrInvalidPartNumberMarker)
	// expected error when the maximum number of parts requested to listed in invalid.
	invalidMaxPartsErr := getAPIError(ErrInvalidMaxParts)

	testCases := []struct {
		fault            Fault
		partNumberMarker string
		maxParts         string

- The synthetic "Bookmark" event for the watch stream requests will now include a new annotation: `kubernetes.io/initial-events-list-blueprint`. THe annotation contains an empty, versioned list that is encoded in the requested format (such as protobuf, JSON, or CBOR), then base64-encoded and stored as a string. ([#127587](https://github.com/kubernetes/kubernetes/pull/127587), [@p0lyn0mial](https://github.com/p0lyn0mial)) [SIG API Machinery]

* `nodeSelector.matchFields` (node's `metadata.node`) is now supported in scheduler. ([#62453](https://github.com/kubernetes/kubernetes/pull/62453), [@k82cn](https://github.com/k82cn))
* Added a parametrizable priority function mapping requested/capacity ratio to priority. This function is disabled by default and can be enabled via the scheduler policy config file.
([#63929](https://github.com/kubernetes/kubernetes/pull/63929), [@losipiuk](https://github.com/losipiuk))

  * The oidc client plugin has reduce round trips and fix scopes requested ([#45317](https://github.com/kubernetes/kubernetes/pull/45317), [@ericchiang](https://github.com/ericchiang))

  configuring this). ([#97979](https://github.com/kubernetes/kubernetes/pull/97979), [@danwinship](https://github.com/danwinship)) [SIG Network and Node]

 - Reduced frequency of DescribeVolumes calls of AWS API when attaching/detaching a volume.
  Fixed "requested device X but found Y" attach error on AWS. ([#89894](https://github.com/kubernetes/kubernetes/pull/89894), [@johanneswuerbach](https://github.com/johanneswuerbach)) [SIG Cloud Provider]

### Deploy a more secure control plane with kubeadm

A new alpha feature allows running the kubeadm control plane components as non-root users. This is a long requested security measure in kubeadm. To try it you must enable the kubeadm-specific `RootlessControlPlane` feature gate. When you deploy a cluster using this alpha feature, your control plane runs with lower privileges.