- `--log-flush-frequency` had no effect in several commands or was missing. Help and warning texts were not always using the right format for a command (`add_dir_header` instead of `add-dir-header`). Fixing this included cleaning up flag handling in component-base/logs: that package no longer adds flags to the global flag sets....

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- K8s.io/component-base/logs: usage of the pflag values in a normal Go flag set led to panics when printing the help message ([#114680](https://github.com/kubernetes/kubernetes/pull/114680), [@pohly](https://github.com/pohly)) [SIG Instrumentation]

For more information about kubectl debug, see [Debugging Running Pods](https://kubernetes.io/docs/tasks/debug-application-cluster/debug-running-pod/) on the Kubernetes website, kubectl help debug, or reach out to SIG CLI by visiting [#sig-cli](https://kubernetes.slack.com/messages/sig-cli) or commenting on [enhancement #1441](https://features.k8s.io/1441).

### Removing deprecated flags in kubeadm

- Kubeadm: a new command `kubeadm alpha certs check-expiration` was created in order to help users in managing expiration for local PKI certificates ([#77863](https://github.com/kubernetes/kubernetes/pull/77863), [@fabriziopandini](https://github.com/fabriziopandini))

### Misc

* Trusty: Avoid reaching GCE custom metadata size limit ([#22818](https://github.com/kubernetes/kubernetes/pull/22818), [@andyzheng0831](https://github.com/andyzheng0831))
* Update kubectl help for 1.2 resources ([#23305](https://github.com/kubernetes/kubernetes/pull/23305), [@janetkuo](https://github.com/janetkuo))

For the 1.8 release, SIG Scheduling extended the concept of cluster sharing by introducing
pod priority and pod preemption. These features allow mixing various types of workloads in a single cluster, and help reach
higher levels of resource utilization and availability.
These features are in alpha. SIG Scheduling also improved the internal APIs for scheduling and made them easier for other components and external schedulers to use.

	public fun get ()Lokhttp3/Request$Builder;
	public final fun gzip ()Lokhttp3/Request$Builder;
	public fun head ()Lokhttp3/Request$Builder;
	public fun header (Ljava/lang/String;Ljava/lang/String;)Lokhttp3/Request$Builder;
	public fun headers (Lokhttp3/Headers;)Lokhttp3/Request$Builder;

- Windows CSI Support: Enabling containerized CSI node plugins in Windows via new [CSIProxy](https://github.com/kubernetes-csi/csi-proxy)
- Recursive Volume Ownership OnRootMismatch Option: Add a new “OnRootMismatch” policy that can help shorten the mount time for volumes that require ownership change and have many directories and files.

### Other notable announcements

  - The `--export` flag for the `kubectl get` command, deprecated since v1.14, will be removed in v1.18.
  - `kubectl cp` no longer supports copying symbolic links from containers; to support this use case, see `kubectl exec --help` for examples using `tar` directly ([#82143](https://github.com/kubernetes/kubernetes/pull/82143), [@soltysh](https://github.com/soltysh))