- The kube-apiserver's healthz now takes in an optional query parameter which allows you to disable health checks from causing healthz failures.  ([#70676](https://github.com/kubernetes/kubernetes/pull/70676), [@logicalhan](https://github.com/logicalhan))

- JWT authenticators specified via the `AuthenticationConfiguration.jwt` array can now optionally specify either the `controlplane` or `cluster` egress selector by setting the `issuer.egressSelectorType` field.  When unset, the prior behavior of using no egress selector is retained.  The StructuredAuthenticationConfigurationEgressSelector beta...

`super-admin.conf` to one year if the file exists; if it does not exist a "MISSING" note will be printed. `kubeadm upgrade apply` for this release will migrate this particular node to the two file setup. Subsequent kubeadm releases will continue to optionally renew the certificate in `super-admin.conf` if the file exists on disk and if renew on upgrade is not disabled. `kubeadm join --control-plane` will now generate only an `admin.conf` file that has the less privileged User. ([#121305](https://git...

  * `--basic-auth-file` supports optionally specifying groups in the fourth column of the file ([#39651](https://github.com/kubernetes/kubernetes/pull/39651), [@liggitt](https://github.com/liggitt))

- Both directory and block devices are now supported for local volume plugin FileSystem VolumeMode.  ([#63011](https://github.com/kubernetes/kubernetes/pull/63011), [@NickrenREN](https://github.com/NickrenREN))
- CSI NodePublish call can optionally contain information about the pod that requested the CSI volume. ([#67945](https://github.com/kubernetes/kubernetes/pull/67945), [@jsafrane](https://github.com/jsafrane))

## Dependencies

### Added
- github.com/antihax/optional: [v1.0.0](https://github.com/antihax/optional/tree/v1.0.0)
- github.com/benbjohnson/clock: [v1.0.3](https://github.com/benbjohnson/clock/tree/v1.0.3)
- github.com/bits-and-blooms/bitset: [v1.2.0](https://github.com/bits-and-blooms/bitset/tree/v1.2.0)

- Expanded the on-disk kubelet credential provider configuration to allow an optional `tokenAttribute` field to be configured. When it is set, the kubelet will provision a token with the given audience bound to the current pod and its service account. This KSA token along with required annotations on the KSA defined in configuration...

- Introduce support for CEL optionals (see [CEL spec proposal 246](https://github.com/google/cel-spec/wiki/proposal-246)).
  This feature will not be fully enabled until a future Kubernetes release (likely to be v1.29), but is added in v1.28 to enable

- Added optional `--detect-local-mode` flag to kube-proxy. Valid values are "ClusterCIDR" (default matching previous behavior) and "NodeCIDR" ([#87748](https://github.com/kubernetes/kubernetes/pull/87748), [@satyasm](https://github.com/satyasm)) [SIG Cluster Lifecycle,...

- EmptyDir memory backed volumes are sized as the minimum of pod allocatable memory on a host and an optional explicit user provided value. ([#100319](https://github.com/kubernetes/kubernetes/pull/100319), [@derekwaynecarr](https://github.com/derekwaynecarr)) [SIG Node]