### kubeadm
* **[beta]** Introduces an API for clients to request TLS certificates from the API server. See the [tutorial](https://kubernetes.io/docs/tasks/tls/managing-tls-in-a-cluster).

### Promoted SeccompDefault to Beta

SeccompDefault promoted to beta, see the tutorial [Restrict a Container's Syscalls with seccomp](https://kubernetes.io/docs/tutorials/security/seccomp/#enable-the-use-of-runtimedefault-as-the-default-seccomp-profile-for-all-workloads) for more details.

### Promoted endPort in Network Policy to Stable

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).

### Quality of Service for memory resources

  - [beta] Opt in source ip preservation for Services with Type NodePort or LoadBalancer ([docs](http://kubernetes.io/docs/tutorials/services/source-ip/)) ([kubernetes/features#27](https://github.com/kubernetes/enhancements/issues/27))

You can find more information about how to restrict container system calls with seccomp in the new [documentation page on Kubernetes.io][seccomp-docs]

[seccomp-docs]: https://kubernetes.io/docs/tutorials/clusters/seccomp/


### Production images moved to community control

As of Kuberenetes v1.19, Kubernetes container images are stored on a community-controlled storage bucket,