pkg path/filepath, func Dir(string) string
pkg path/filepath, func EvalSymlinks(string) (string, error)
pkg path/filepath, func Ext(string) string
pkg path/filepath, func FromSlash(string) string
pkg path/filepath, func Glob(string) ([]string, error)
pkg path/filepath, func HasPrefix(string, string) bool
pkg path/filepath, func IsAbs(string) bool
pkg path/filepath, func Join(...string) string

- [API Server Network Proxy](https://github.com/kubernetes/enhancements/blob/master/keps/sig-api-machinery/1281-network-proxy/README.md) going alpha in 1.16.
- [Extensions](https://github.com/kubernetes/enhancements/blob/master/keps/sig-cloud-provider/991-cloud-controller-migration/README.md) for Cloud Controller Manager Migration.

## What’s New (Major Themes)

### Kubernetes Topology Manager Moves to Beta - Align Up!

- Alpha swap support can now be enabled on Kubernetes nodes with the `NodeSwapEnabled` feature flag. See [KEP-2400](https://github.com/kubernetes/enhancements/blob/master/keps/sig-node/2400-node-swap/README.md#design-details) for details. ([#102823](https://github.com/kubernetes/kubernetes/pull/102823), [@ehashman](https://github.com/ehashman))

## Changelog since v1.20.0-alpha.0

## Urgent Upgrade Notes

### (No, really, you MUST read this before you upgrade)

biz.tj
biz.tr
biz.tt
biz.ua
biz.vn
biz.wf
biz.zm
bizen.okayama.jp
bj
bj.cn
bjarkoy.no
bjarkøy.no
bjerkreim.no
bjugn.no
bl.it
black
blackbaudcdn.net
blackfriday
blob.core.windows.net
blockbuster
blog
blog.bo
blog.br
blogdns.com
blogdns.net
blogdns.org
blogsite.org
blogspot.ae
blogspot.al
blogspot.am
blogspot.ba
blogspot.be

### Deprecation of FlexVolume

FlexVolume is deprecated. Out-of-tree CSI driver is the recommended way to write volume drivers in Kubernetes.
See [this doc](https://github.com/kubernetes/community/blob/master/sig-storage/volume-plugin-faq.md#kubernetes-volume-plugin-faq-for-storage-vendors) for more information.
Maintainers of FlexVolume drivers should implement a CSI driver and move users of FlexVolume to CSI.

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### SIG Node

Pod with multiple containers can use `kubectl.kubernetes.io/default-container` annotation to have a container preselected for kubectl commands. More can be read in [KEP-2227](https://github.com/kubernetes/enhancements/blob/master/keps/sig-cli/2227-kubectl-default-container/README.md).

### Immutable Secrets and ConfigMaps