*...

- Kubeadm: fix an issue with the kube-proxy container env. variables ([#84888](https://github.com/kubernetes/kubernetes/pull/84888), [@neolit123](https://github.com/neolit123))
- Utilize diagnostics tool to dump GKE windows test logs ([#83517](https://github.com/kubernetes/kubernetes/pull/83517), [@YangLu1031](https://github.com/YangLu1031))

upgrading, and deleting clusters.

For the 1.8 release, SIG Cluster Lifecycle continued to focus on expanding the
capabilities of kubeadm, which is both a user-facing tool to manage clusters
and a building block for higher-level provisioning systems. Starting
with the 1.8 release, kubeadm supports a new upgrade command and includes alpha
support for self hosting the cluster control plane.

- The following deprecated metrics are removed, please convert to the corresponding metrics:

* [Role-based access control (RBAC)](https://kubernetes.io//docs/admin/authorization/rbac) has graduated to beta, and defines secure default roles for control plane, node, and controller components.
* The [`kubeadm` cluster bootstrap tool](https://kubernetes.io/docs/getting-started-guides/kubeadm/) has graduated to beta. Some highlights:
  * **WARNING:** A [known issue](https://github.com/kubernetes/kubernetes/issues/43815)

- The `StructuredAuthenticationConfiguration` feature is now beta and enabled. ([#123719](https://github.com/kubernetes/kubernetes/pull/123719), [@enj](https://github.com/enj))
- The `kube_codegen` tool now ignores the vendor folder during code generation.
   ([#122729](https://github.com/kubernetes/kubernetes/pull/122729), [@jparrill](https://github.com/jparrill))

  - [alpha] The `kubeadm` tool makes it much easier to bootstrap Kubernetes. ([docs](http://kubernetes.io/docs/getting-started-guides/kubeadm/)) ([kubernetes/features#11](https://github.com/kubernetes/enhancements/issues/11))
- **Federation**

	* Mechanism of adding `federation domain maps` to kube-dns deployment via `--federations` flag is superseded by adding/updating `federations` key in `kube-system/kube-dns` configmap. If user is using kubefed tool to join cluster federation, adding federation domain maps to kube-dns is already taken care by `kubefed join` and does not need further action.

  - A namespaced object with an ownerReference referencing a uid of a namespaced kind which does not exist in the same namespace is now consistently treated...

  - [alpha] Introducing `kubefed`, a new command line tool to simplify federation control plane. ([docs](http://kubernetes.io/docs/admin/federation/kubefed/)) ([kubernetes/features#97](https://github.com/kubernetes/enhancements/issues/97))
- **Network**