([docs](http://kubernetes.io/docs/user-guide/federation/federated-secrets.md))
    ([kubernetes/features#68](https://github.com/kubernetes/enhancements/issues/68))
  - [beta] Federation API server gained support for events and many
    federation controllers now report important events.
    ([docs](http://kubernetes.io/docs/user-guide/federation/events))

- HA improvements:
  - `kubeadm join --experimental-control-plane` can now be used to join control plane instances to an existing cluster.
  - `kubeadm upgrade node experimental-control-plane` can now be used for upgrading secondary control plane instances created with `kubeadm join --experimental-control-plane`.
Multi-arch support (EXPERIMENTAL):

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` of `kubeadm join` is no longer experimental and will now always run. ([#134106](https://github.com/kubernetes/kubernetes/pull/134106), [@neolit1...

* `--feature-gates` argument has been removed from the `kubeadm join` command. Feature gates will be retrieved from the cluster configuration during the join process. ([#70755](https://github.com/kubernetes/kubernetes/pull/70755), [@ereslibre](https://github.com/ereslibre))

* `kubeadm join` is now blocking on the kubelet performing the TLS Bootstrap properly. Earlier, `kubeadm join` only did the discovery part and exited successfully without checking that the kubelet actually started properly and performed the TLS bootstrap correctly. Now, as kubeadm runs some post-join steps (for example, annotating the Node API object with the CRISocket), `kubeadm join` is now waiting for the kubelet to perform the TLS Bootstrap,...

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work thus licensed is called the contributor's "contributor version".

  A contributor's "essential patent claims" are all patent claims
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by this License, of making, using, or selling its contributor version,

ush(t),_.push(s),_.push(n);r.sort(e),d.sort(e),i.sort(e),_.sort(e),this._weekdaysRegex=new RegExp("^("+_.join("|")+")","i"),this._weekdaysShortRegex=this._weekdaysRegex,this._weekdaysMinRegex=this._weekdaysRegex,this._weekdaysStrictRegex=new RegExp("^("+i.join("|")+")","i"),this._weekdaysShortStrictRegex=new RegExp("^("+d.join("|")+")","i"),this._weekdaysMinStrictRegex=new RegExp("^("+r.join("|")+")","i")}function Qe(){return this.hours()%12||12}function Xe(e,a){W(e,0,0,function(){return this.lo...

- Kubeadm: unhide the "etcd-join" phase of "kubeadm join" to allow on-demand execution of the phase if the ControlPlaneLocalMode feature gate is not enabled ([#135481](https://github.com/kubernetes/kubernetes/pull/135481), [@borovetsav](https://github.com/borovetsav)) [SIG Cluster Lifecycle]...

- Kubeadm: added `show-join-command` as a new separate phase at the end of `kubeadm init`. You can skip printing the join information by using `kubeadm init --skip-phases=show-join-command`. Executing only this phase on demand will throw an error because the phase needs dependencies such as bootstrap tokens to be pre-populated. ([#111512](https://git...

- Kubeadm increased to 5 minutes its timeout for the TLS bootstrapping process to complete upon join ([#89735](https://github.com/kubernetes/kubernetes/pull/89735), [@rosti](https://github.com/rosti)) [SIG Cluster Lifecycle]