- Coordination.v1alpha1 API is dropped and replaced with coordination.v1alpha2. Old coordination.v1alpha1 types must be deleted before upgrade ([#127857](https://github.com/kubernetes/kubernetes/pull/127857), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery, Etcd, Scheduling and Testing]

   ([#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))

    - [Added](#added-7)
    - [Changed](#changed-7)
    - [Removed](#removed-7)
- [v1.34.0-alpha.3](#v1340-alpha3)
  - [Downloads for v1.34.0-alpha.3](#downloads-for-v1340-alpha3)
    - [Source Code](#source-code-8)
    - [Client Binaries](#client-binaries-8)
    - [Server Binaries](#server-binaries-8)
    - [Node Binaries](#node-binaries-8)
    - [Container Images](#container-images-8)

- 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))

- Added the `StorageVersionMigration` `v1beta1` API and removed the `v1alpha1` API.
  

    * 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"`)

  to kubelet config ([#112136](https://github.com/kubernetes/kubernetes/pull/112136), [@pacoxu](https://github.com/pacoxu))
- `resource.k8s.io/v1alpha1` was replaced with `resource.k8s.io/v1alpha2`. Before
  upgrading a cluster, all objects in resource.k8s.io/v1alpha1 (ResourceClaim, ResourceClaimTemplate,
  ResourceClass, PodScheduling) must be deleted. The changes are internal, so

- Added support for CEL expressions to `v1alpha1 AuthorizationConfiguration` webhook `matchConditions`. ([#121223](https://github.com/kubernetes/kubernetes/pull/121223), [@ritazh](https://github.com/ritazh))

- Introduced `v1alpha1` API for validating admission policies, enabling extensible admission control via CEL expressions (KEP  3488: CEL for Admission Control). To use, enable the `ValidatingAdmissionPolicy` feature gate and the `admissionregistration.k8s.io/v1alpha1` API via `--runtime-config`. ([#113314](https://github.com/kubernetes/kubernetes/pull/113314), [@cici37](https://github.com/cici37))...