*   You can now add "options" to the host's /etc/resolv.conf (or --resolv-conf), and they will be copied into pod's resolv.conf when dnsPolicy is Default. Being able to customize options is important because it is common to leverage options to fine-tune the behavior of DNS client. ([#54773](https://github.com/kubernetes/kubernetes/pull/54773),[...

* AWS: Recognize ca-central-1 region ([#38410](https://github.com/kubernetes/kubernetes/pull/38410), [@justinsb](https://github.com/justinsb))
* Add TLS conf for Go1.7 ([#38600](https://github.com/kubernetes/kubernetes/pull/38600), [@k82cn](https://github.com/k82cn))

* Fix for resourcepool-path configuration in the vsphere.conf file. ([#66261](https://github.com/kubernetes/kubernetes/pull/66261), [@divyenpatel](https://github.com/divyenpatel))

- Kubelet: the following dockershim related flags are also removed along with dockershim `--experimental-dockershim-root-directory`, `--docker-endpoint`, `--image-pull-progress-deadline`, `--network-plugin`, `--cni-conf-dir`, `--cni-bin-dir`, `--cni-cache-dir`, `--network-plugin-mtu`. ([#106907](https://github.com/kubernetes/kubernetes/pull/106907), [@cyclinder](https://github.com/cyclinder))

- Kubeadm: Graduated the kubeadm-specific feature gate `ControlPlaneKubeletLocalMode` to GA and locked it to enabled by default. To opt out, patch the `server` field in `/etc/kubernetes/kubelet.conf`. Deprecated the subphase of `kubeadm join phase control-plane-join` called `etcd`, which is now hidden and replaced by subphase with identical functionality `etcd-join`. The `etcd` subphase will be removed in a future release. The subphase `kubelet-wait-bootstrap`...

- Kubernetes now correctly handles "search ." in the host's resolv.conf file by preserving the "." entry in the "resolv.conf" that the kubelet writes to pods. ([#109441](https://github.com/kubernetes/kubernetes/pull/109441), [@Miciah](https://github.com/Miciah)) [SIG Network and Node]

  nameserver 1.2.3.4.
  ```
  "upstreamNameservers": ["8.8.8.8", "8.8.4.4"]
  ```
  is a list of upstreamNameservers to use, overriding the configuration
  specified in /etc/resolv.conf.

* An empty `kube-system:kube-dns` ConfigMap will be created for the cluster if one did not already exist.

### kube-proxy

- Avoided propagating hosts `search .` into containers in `/etc/resolv.conf`. ([#112157](https://github.com/kubernetes/kubernetes/pull/112157), [@dghubble](https://github.com/dghubble))

* kubeadm: fix a bug where standard kubeconfig paths were searched even if the user provided /etc/kubernetes/admin.conf explicitly for commands that accept --kubeconfig, like kubeadm token. ([#71874](https://github.com/kubernetes/kubernetes/pull/71874), [@neolit123](https://github.com/neolit123))
    * kubeadm: use the default kubeconfig (/etc/kubernetes/admin.conf) for "kubeadm reset" and "kubeadm upgrade" commands.

- Kubeadm: fix potential panic when executing "kubeadm reset" with a corrupted kubelet.conf file ([#86216](https://github.com/kubernetes/kubernetes/pull/86216), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]