The API does include a few breaking changes:
  - The "extraArgs" component construct is now a list of "name"/"value" pairs instead of a string/string map. This has been done to support duplicate args where needed.
  - The "JoinConfiguration.discovery.timeout" field has been replaced by "JoinConfiguration.timeouts.discovery".

- `kubeadm`: Added a preflight check `ContainerRuntimeVersion` to validate if the installed container runtime supports the `RuntimeConfig` gRPC method. If unsupported, `kubeadm` prints a warning message.
  

- The EndpointSlice controller now waits for EndpointSlice and Node caches to be synced before starting. ([#94086](https://github.com/kubernetes/kubernetes/pull/94086), [@robscott](https://github.com/robscott)) [SIG Apps and Network]
- Upon successful authorization check, an impersonated user is added to the system:authenticated group.

    * Add registry action to the kubernetes-worker charm

    * Add support for kube-proxy cluster-cidr option to kubernetes-worker charm

    * Fix kubernetes-master charm starting services before TLS certs are saved

    * Fix kubernetes-worker charm failures in LXD

    * Fix stop hook failure on kubernetes-worker charm

</p>

<h3 id="String_types">String types</h3>

<p>
A <i>string type</i> represents the set of string values.
A string value is a (possibly empty) sequence of bytes.
The number of bytes is called the length of the string and is never negative.
Strings are immutable: once created,
it is impossible to change the contents of a string.
The predeclared string type is <code>string</code>;

- Kube-apiserver: Fixes spurious warning log messages about enabled alpha APIs while starting API server ([#135343](https://github.com/kubernetes/kubernetes/pull/135343), [@michaelasp](https://github.com/michaelasp)) [SIG API Machinery]

                  peeker.getDone(future5));
            }

            @Override
            public String toString() {
              return function.toString();
            }
          },
          executor);
    }
  }

  @Override
  public String toString() {
    // TODO(dpb): Better toString, in the style of Futures.transform etc.

	if len(logger.AuditTargets()) == 0 {
		return
	}

	opts := AuditLogOptions{
		Event:     "DeleteDanglingObject",
		Bucket:    bucket,
		Object:    object,
		VersionID: versionID,
		Tags:      tags,
	}

	auditLogInternal(ctx, opts)
}

func joinErrs(errs []error) string {
	var s string
	for i := range s {

- Kubeadm: add startup probes for static Pods to protect slow starting containers ([#91179](https://github.com/kubernetes/kubernetes/pull/91179), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

streaming_cluster_id              (string)    unique ID for NATS streaming cluster
cert_authority                    (string)    path to certificate chain of the target NATS server
client_cert                       (string)    client cert for NATS mTLS auth
client_key                        (string)    client cert key for NATS mTLS auth
queue_dir                         (path)      staging dir for undelivered messages e.g. '/home/events'