- **Scheduling**
  - [alpha] Allows pods to require or prohibit (or prefer or prefer not) co-scheduling on the same node (or zone or other topology domain) as another set of pods. ([docs](http://kubernetes.io/docs/user-guide/node-selection/) ([kubernetes/features#51](https://github.com/kubernetes/enhancements/issues/51))
- **Storage**

 - Newly provisioned PVs by EBS plugin will no longer use the deprecated "failure-domain.beta.kubernetes.io/zone" and "failure-domain.beta.kubernetes.io/region" labels. It will use "topology.kubernetes.io/zone" and "topology.kubernetes.io/region" labels instead. ([#99130](https://github.com/kubernetes/kubernetes/pull/99130), [@ayberk](https://github.com/ayberk))...

  The following configuration options have been added to the `kube-system:kube-dns` ConfigMap:
  ```
  "stubDomains": {
    "acme.local": ["1.2.3.4"]
  },
  ```
  is a map of domain to list of nameservers for the domain. This is used
  to inject private DNS domains into the kube-dns namespace. In the above
  example, any DNS requests for *.acme.local will be served by the
  nameserver 1.2.3.4.
  ```

- Kube-proxy:...

* Deprecate the beta labels for zones ("failure-domain.beta.kubernetes.io/zone") and  ([#81431](https://github.com/kubernetes/kubernetes/pull/81431), [@andrewsykim](https://github.com/andrewsykim))
    * regions ("failure-domain.beta.kubernetes.io/region") in favor of their GA equivalents:
    * "topology.kubernetes.io/zone" and "topology.kubernetes.io/region".

        * `beta.kubernetes.io/instance-type`
        * `beta.kubernetes.io/os`
        * `beta.kubernetes.io/arch`
        * `failure-domain.kubernetes.io/zone`
        * `failure-domain.kubernetes.io/region`
        * `failure-domain.beta.kubernetes.io/zone`
        * `failure-domain.beta.kubernetes.io/region`
        * `[*.]kubelet.kubernetes.io/*`
        * `[*.]node.kubernetes.io/*`

    setUp(protocol)
    val cookieJar = RecordingCookieJar()
    val requestCookie =
      Cookie
        .Builder()
        .name("a")
        .value("b")
        .domain(server.hostName)
        .build()
    cookieJar.enqueueRequestCookies(requestCookie)
    client =
      client
        .newBuilder()
        .cookieJar(cookieJar)
        .build()

	* Mechanism of adding `federation domain maps` to kube-dns deployment via `--federations` flag is superseded by adding/updating `federations` key in `kube-system/kube-dns` configmap. If user is using kubefed tool to join cluster federation, adding federation domain maps to kube-dns is already taken care by `kubefed join` and does not need further action.

fetching of public verifying keys, by enabling the Alpha `ExternalServiceAccountTokenSigner` feature gate and specifying `--service-account-signing-endpoint`. The flag value can either be the location of a Unix domain socket on a filesystem, or be prefixed with an @ symbol and name a Unix domain socket in the abstract socket namespace. ([#128190](https://github.com/kubernetes/kubernetes/pull/128190), [@HarshalNeelkamal](https://github.com/HarshalNeelkamal)) [SIG API Machinery, Apps, Auth, Etcd, Instrumentation,...

- Reminder: The labels "failure-domain.beta.kubernetes.io/zone" and "failure-domain.beta.kubernetes.io/region" are deprecated in favor of "topology.kubernetes.io/zone" and "topology.kubernetes.io/region" respectively.  All users of the "failure-domain.beta..." labels should switch to the "topology..." equivalents. ([#96033](https://github.com/kubernetes/kubernetes/pull/96033), [@thockin](h...