* **[alpha]** New Bootstrap Token authentication and management method. Works well with kubeadm. kubeadm now supports managing tokens, including time based expiration, after the cluster...

* Add translation to Portuguese for [Tutorial - User Guide - Intro - Tutorial - Guia de Usuário - Introdução](https://fastapi.tiangolo.com/pt/tutorial/). PR [#1259](https://github.com/tiangolo/fastapi/pull/1259) by [@marcosmmb](https://github.com/marcosmmb).
* Allow using Unicode in MkDocs for translations. PR [#1419](https://github.com/tiangolo/fastapi/pull/1419).

versions. Non RFC2822/ISO date formats are discouraged and will be removed in an upcoming major release. Please refer to http://momentjs.com/guides/#/warnings/js-date/ for more info.",function(e){e._d=new Date(e._i+(e._useUTC?" UTC":""))}),l.ISO_8601=function(){},l.RFC_2822=function(){};var Ha=t("moment().min is deprecated, use moment.max instead. http://momentjs.com/guides/#/warnings/min-max/",function(){var e=Sa.apply(null,arguments);return this.isValid()&&e.isValid()?e<this?this:e:f()}),ba=t("moment().max...

* rkt version 1.23.0+

    * known issues with the rkt runtime are [listed in the Getting Started Guide](https://kubernetes.io/docs/getting-started-guides/rkt/notes/)

* etcd version 3.0.17

* Go version: 1.8.3. [Link to announcement](https://groups.google.com/d/msg/kubernetes-dev/0XRRz6UhhTM/YODWVnuDBQAJ)

### Promoted Server Side Unknown Field Validation to Beta

    *   Best practice for version 1.9 and future versions is to explicitly set a cloud-provider. See [the documentation](https://kubernetes.io/docs/getting-started-guides/scratch/#cloud-providers)
*   The kubeadm `--skip-preflight-checks` flag is now deprecated and will be removed in a future release.

- The errors in k8s.io/apimachinery/pkg/api/meta gained support for the stdlibs errors.Is matching, including when wrapped ([#111808](https://github.com/kubernetes/kubernetes/pull/111808), [@alvaroaleman](https://github.com/alvaroaleman)) [SIG API Machinery]

## Major Themes

Kubernetes is developed by community members whose work is organized into
[Special Interest Groups][]. For the 1.8 release, each SIG provides the
themes that guided their work.

[Special Interest Groups]: https://github.com/kubernetes/community/blob/master/sig-list.md

### SIG API Machinery

- Kubeadm: remove the deprecated "kubeadm alpha kubelet config enable-dynamic" command. To continue using the feature please defer to the guide for "Dynamic Kubelet Configuration" at k8s.io. This change also removes the parent...

- Changed core_pattern on COS nodes to be an absolute path. ([#86329](https://github.com/kubernetes/kubernetes/pull/86329), [@mml](https://github.com/mml)) [SIG Cluster Lifecycle and Node]
- Client-go certificate manager rotation gained the ability to preserve optional intermediate chains accompanying issued certificates ([#88744](https://github.com/kubernetes/kubernetes/pull/88744), [@jackkleeman](https://github.com/jackkleeman)) [SIG API Machinery and Auth]