- Introduced the `job_finished_indexes_total` metric for the `BackoffLimitPerIndex` feature. ([#121292](https://github.com/kubernetes/kubernetes/pull/121292), [@mimowo](https://github.com/mimowo))
- Kubeadm: supported updating certificate organization during `kubeadm certs renew` operation. ([#121841](https://github.com/kubernetes/kubernetes/pull/121841), [@SataQiu](https://github.com/SataQiu))

([#625](https://github.com/kubernetes/enhancements/issues/625))

#### Additional Notable Feature Updates
- Support for go modules in Kubernetes Core.
- Continued preparation for cloud provider extraction and code organization.  The cloud provider code has been moved to kubernetes/legacy-cloud-providers for easier removal later and external consumption.

* `kubeadm alpha phase kubeconfig user` supports groups (organizations) to be specified in client cert. ([#62627](https://github.com/kubernetes/kubernetes/pull/62627), [@xiangpengzhao](https://github.com/xiangpengzhao))

of the same package. Those elements may be
<a href="#Exported_identifiers">exported</a> and used in another package.
</p>

<h3 id="Source_file_organization">Source file organization</h3>

<p>
Each source file consists of a package clause defining the package
to which it belongs, followed by a possibly empty set of import
declarations that declare packages whose contents it wishes to use,