- The `NodeConfiguration` kind in the kubeadm v1alpha2 API has been renamed `JoinConfiguration` in v1alpha3 ([#65951](https://github.com/kubernetes/kubernetes/pull/65951), [@luxas](https://github.com/luxas)) Courtesy of SIG Cluster Lifecycle

* [action required] kubeadm: The `v1alpha2` config API has been removed. ([#69055](https://github.com/kubernetes/kubernetes/pull/69055), [@fabriziopandini](https://github.com/fabriziopandini))
    * Please convert your `v1alpha2` configuration files to `v1alpha3` using the
    * `kubeadm config migrate` command of kubeadm v1.12.x

### Other notable changes

   ([#123372](https://github.com/kubernetes/kubernetes/pull/123372), [@carlory](https://github.com/carlory))

- Kubeadm: removed the deprecated `output.kubeadm.k8s.io/v1alpha2` API for structured output. Please use v1alpha3 instead. ([#124496](https://github.com/kubernetes/kubernetes/pull/124496), [@carlory](https://github.com/carlory))

    - [Node Binaries](#node-binaries-13)
  - [Changelog since v1.14.0-alpha.3](#changelog-since-v1140-alpha3)
    - [Action Required](#action-required-2)
    - [Other notable changes](#other-notable-changes-11)
- [v1.14.0-alpha.3](#v1140-alpha3)
  - [Downloads for v1.14.0-alpha.3](#downloads-for-v1140-alpha3)
    - [Client Binaries](#client-binaries-14)
    - [Server Binaries](#server-binaries-14)

    - [Node Binaries](#node-binaries-13)
  - [Changelog since v1.15.0-alpha.3](#changelog-since-v1150-alpha3)
    - [Action Required](#action-required)
    - [Other notable changes](#other-notable-changes-7)
- [v1.15.0-alpha.3](#v1150-alpha3)
  - [Downloads for v1.15.0-alpha.3](#downloads-for-v1150-alpha3)
    - [Client Binaries](#client-binaries-14)
    - [Server Binaries](#server-binaries-14)

- Kubelet: plugins for dynamic resource allocation may use the `v1alpha3` API instead of v1alpha2 if they want to do prepare/unprepare operations in batches. ([#119012](https://github.com/kubernetes/kubernetes/pull/119012), [@pohly](https://github.com/pohly))

* The kubeadm configuration file version has been upgraded from `v1alpha1` to `v1alpha2`. `v1alpha1` read support exists in v1.11, but will be removed in v1.12. ([#63788](https://github.com/kubernetes/kubernetes/pull/63788), [@luxas](https://github.com/luxas))
The following PRs changed the API spec:

    * rbac.authorization.k8s.io/v1alpha1
    * settings.k8s.io/v1alpha1
    * If you wish to continue using them in v1.8, please enable them explicitly using the `--runtime-config` flag of the apiserver (for example, `--runtime-config="rbac.authorization.k8s.io/v1alpha1,settings.k8s.io/v1alpha1"`)

    - [Node Binaries](#node-binaries-18)
  - [Changelog since v1.10.0-alpha.3](#changelog-since-v1100-alpha3)
    - [Action Required](#action-required-4)
    - [Other notable changes](#other-notable-changes-18)
- [v1.10.0-alpha.3](#v1100-alpha3)
  - [Downloads for v1.10.0-alpha.3](#downloads-for-v1100-alpha3)
    - [Client Binaries](#client-binaries-19)
    - [Server Binaries](#server-binaries-19)