- Hyperkube will now be available in a new Github repository and will not be included in the kubernetes release from 1.17 onwards ([#83454](https://github.com/kubernetes/kubernetes/pull/83454), [@dims](https://github.com/dims))

### Other (Cleanup or Flake)

- Kubeadm: change the default image repository for CI images from 'gcr.io/kubernetes-ci-images' to 'gcr.io/k8s-staging-ci-images' ([#97087](https://github.com/kubernetes/kubernetes/pull/97087), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

* Add SNI support to the apiserver ([#35109](https://github.com/kubernetes/kubernetes/pull/35109), [@sttts](https://github.com/sttts))
* The main kubernetes repository stops hosting archived version of released clients. Please use [client-go](https://github.com/kubernetes/client-go). ([#35928](https://github.com/kubernetes/kubernetes/pull/35928), [@caesarxuchao](https://github.com/caesarxuchao))

  of probes, labels, annotations and initContainers from copy pod. ([#123149](https://github.com/kubernetes/kubernetes/pull/123149), [@mochizuki875](https://github.com/mochizuki875)) [SIG CLI and Testing]
- Added `cri-client` staging repository. ([#123797](https://github.com/kubernetes/kubernetes/pull/123797), [@saschagrunert](https://github.com/saschagrunert)) [SIG API Machinery, Node, Release and Testing]

### OpenStack

SIG-OpenStack updated the OpenStack provider to use newer APIs, consolidated community code into one repository, engaged with the Cloud Provider Working Group to have a consistent plan for moving provider code into individual repositories, improved testing of provider code, and strengthened ties with the OpenStack developer community.

* set EnableHTTPSTrafficOnly in azure storage account creation ([#64957](https://github.com/kubernetes/kubernetes/pull/64957), [@andyzhangx](https://github.com/andyzhangx))
* Re-adds `pkg/generated/bindata.go` to the repository to allow some parts of k8s.io/kubernetes to be go-vendorable. ([#65985](https://github.com/kubernetes/kubernetes/pull/65985), [@ixdy](https://github.com/ixdy))

* Fix resync goroutine leak in ListAndWatch ([#35672](https://github.com/kubernetes/kubernetes/pull/35672), [@tatsuhiro-t](https://github.com/tatsuhiro-t))

#### client-go
* The main repository does not keep multiple releases of clientsets anymore. Please find previous releases at https://github.com/kubernetes/client-go ([#38154](https://github.com/kubernetes/kubernetes/pull/38154), [@caesarxuchao](https://github.com/caesarxuchao))

- Image garbage collection no longer fails for images with only one tag but more than one repository associated. ([#70647](https://github.com/kubernetes/kubernetes/pull/70647), [@corvus-ch](https://github.com/corvus-ch))

- `kubeadm`: fixed `nil` pointer when `etcd` member is already removed. ([#119753](https://github.com/kubernetes/kubernetes/pull/119753), [@pacoxu](https://github.com/pacoxu))
- `kubeadm`: fixed the bug where `--image-repository` flag is missing for some init
  phase sub-commands. ([#120072](https://github.com/kubernetes/kubernetes/pull/120072), [@SataQiu](https://github.com/SataQiu))

- Kubeadm: when using a custom image repository for CoreDNS kubeadm now will append the `coredns` image name instead of `coredns/coredns`, thus restoring the behaviour existing before the v1.21 release. Users who rely on nested folder for the coredns image should set the `clusterConfiguratio...