* AWS: Recognize ca-central-1 region ([#38410](https://github.com/kubernetes/kubernetes/pull/38410), [@justinsb](https://github.com/justinsb))
* fix nil dereference when doing a volume type check on persistent volumes ([#39529](https://github.com/kubernetes/kubernetes/pull/39529), [@sjenning](https://github.com/sjenning))

- Added support for installing `arm64` node artifacts. ([#99242](https://github.com/kubernetes/kubernetes/pull/99242), [@liu-cong](https://github.com/liu-cong))

* Authors of aggregated API servers must not rely on authorization being done by the kube-apiserver, and must do delegated authorization in addition. ([#61349](https://github.com/kubernetes/kubernetes/pull/61349), [@sttts](https://github.com/sttts))

* [Breaking change, client-go]: The WaitFor function returns, probably an ErrWaitTimeout, when the done channel is closed, even if the `WaitFunc` doesn't handle the done channel. ([#72364](https://github.com/kubernetes/kubernetes/pull/72364), [@kdada](https://github.com/kdada))

* kubelet to master communication when doing node status updates now has a timeout to prevent indefinite hangs ([#52176](https://github.com/kubernetes/kubernetes/pull/52176), [@liggitt](https://github.com/liggitt))

### AWS

#### CustomResourceDefinition OpenAPI Publishing

OpenAPI specs for native types have long been served at /openapi/v2, and they are consumed by a number of components, notably kubectl client-side validation, kubectl explain and OpenAPI based client generators.

With Kubernetes 1.15 as beta, OpenAPI schemas are also published for CRDs, as long as their schemas are structural.

  
  The API does include a few breaking changes:
  - The "extraArgs" component construct is now a list of "name"/"value" pairs instead of a string/string map. This has been done to support duplicate args where needed.
  - The "JoinConfiguration.discovery.timeout" field has been replaced by "JoinConfiguration.timeouts.discovery".

ains","a","b","bup","compareDocumentPosition","rcssescape","fcssescape","ch","asCodePoint","charCodeAt","escapeSelector","sel","preferredDoc","pushNative","Expr","outermostContext","sortInput","hasDuplicate","documentIsHTML","rbuggyQSA","dirruns","done","classCache","createCache","tokenCache","compilerCache","nonnativeSelectorCache","sortOrder","booleans","identifier","attributes","pseudos","rwhitespace","rcomma","rleadingCombinator","rdescend","rpseudo","ridentifier","matchExpr","ID","CLASS","T...

- ValidatingAdmissionPolicy type checking now correctly handles `authorizer` variable. ([#118540](https://github.com/kubernetes/kubernetes/pull/118540), [@jiahuif](https://github.com/jiahuif)) [SIG API Machinery]
- When a pod is done or not going to run, then `ResourceClaims` for it can be reused by other pods or deleted. ([#118817](https://github.com/kubernetes/kubernetes/pull/118817), [@pohly](https://github.com/pohly))