- Fix spurious kube-apiserver log warnings related to openapi v3 merging when creating or modifying CustomResourceDefinition objects ([#109880](https://github.com/kubernetes/kubernetes/pull/109880), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery and Testing]

* kubeadm: improved RequiredIPVSKernelModulesAvailable warning message ([#74033](https://github.com/kubernetes/kubernetes/pull/74033), [@bart0sh](https://github.com/bart0sh))
* Add `nullable` support to CustomResourceDefinition OpenAPI validation schemata. ([#74804](https://github.com/kubernetes/kubernetes/pull/74804), [@sttts](https://github.com/sttts))

* Added block volume support to Cinder volume plugin. ([#64879](https://github.com/kubernetes/kubernetes/pull/64879), [@bertinatto](https://github.com/bertinatto))
* fixed incorrect OpenAPI schema for CustomResourceDefinition objects ([#65256](https://github.com/kubernetes/kubernetes/pull/65256), [@liggitt](https://github.com/liggitt))

Beta versions in favour of the GA version of those APIs. All existing objects can be interacted with via general availability APIs. This removal includes beta versions of `ValidatingWebhookConfiguration`, `MutatingWebhookConfiguration`, `CustomResourceDefinition`, `APIService`, `TokenReview`, `SubjectAccessReview`, `CertificateSigningRequest`, `Lease`, `Ingress`, and `IngressClass` APIs. For the full list check out [Deprecated API Migration Guide](https://kubernetes.io/docs/reference/using-api/d...