- true/strict - perform validation and error the request on any invalid fields in the ojbect. It will attempt to perform server-side validation if it is enabled on the apiserver, otherwise it will fall back to client-side validation.

### External credential provider for client-go

The client-go credential plugins can now be passed in the current cluster information via the `KUBERNETES_EXEC_INFO` environment variable. Learn more about this on [client-go credential plugins documentation](https://docs.k8s.io/reference/access-authn-authz/authentication/#client-go-credential-plugins/).

### CronJob controller v2 is available through feature gate

- Fixed issue where `kubectl-convert` would fail when encountering resources that could not be converted to the specified api version. New behavior is to warn the user of the failed conversions and continue to convert the remaining resources. ([#117002](https://github.com/kubernetes/kubernetes/pull/117002), [@gxwilkerson33](https://github.com/gxwilkerson33))

* `apply` now supports explicitly clearing values by setting them to null ([#40630](https://github.com/kubernetes/kubernetes/pull/40630), [@liggitt](https://github.com/liggitt))
* Warn user when using `apply` on a resource lacking the `LastAppliedConfig` annotation ([#36672](https://github.com/kubernetes/kubernetes/pull/36672), [@ymqytw](https://github.com/ymqytw))

- Performs strict server side schema validation requests via the `fieldValidation=[Strict,Warn,Ignore]`. ([#105916](https://github.com/kubernetes/kubernetes/pull/105916), [@kevindelgado](https://github.com/kevindelgado))
- Promote `IPv6DualStack` feature to stable.

  point to the same deployment.'
   ([#112011](https://github.com/kubernetes/kubernetes/pull/112011), [@pbeschetnov](https://github.com/pbeschetnov))
- 'Pod Security admission: the pod-security `warn` level will now default to
  the `enforce` level.'
   ([#113491](https://github.com/kubernetes/kubernetes/pull/113491), [@tallclair](https://github.com/tallclair))

* Allow for configuring etcd hostname in the manifest ([#54403](https://github.com/kubernetes/kubernetes/pull/54403), [@wojtek-t](https://github.com/wojtek-t))
* - kubeadm  will warn users if access to IP ranges for Pods or Services will be done via HTTP proxy. ([#52792](https://github.com/kubernetes/kubernetes/pull/52792), [@kad](https://github.com/kad))

### Kubernetes API Reference Documentation

To learn more about the feature, please refer to the official [seccomp tutorial](https://kubernetes.io/docs/tutorials/clusters/seccomp/#enable-the-use-of-runtimedefault-as-the-default-seccomp-profile-for-all-workloads).