- **Cluster Ops**
  - [alpha] Added ability to create/remove clusters w/highly available (replicated) masters on GCE using kube-up/kube-down scripts. ([docs](http://kubernetes.io/docs/admin/ha-master-gce/)) ([kubernetes/features#48](https://github.com/kubernetes/enhancements/issues/48))
- **Federation**

### Other notable changes

* Remove cpu limits for dns pod to avoid CPU starvation ([#33227](https://github.com/kubernetes/kubernetes/pull/33227), [@vishh](https://github.com/vishh))
* Resolves x509 verification issue with masters dialing nodes when started with --kubelet-certificate-authority ([#33141](https://github.com/kubernetes/kubernetes/pull/33141), [@liggitt](https://github.com/liggitt))