* Fix issue with PodDisruptionBudgets in which `minAvailable` specified as a percentage did not work with StatefulSet Pods. ([#39454](https://github.com/kubernetes/kubernetes/pull/39454), [@foxish](https://github.com/foxish))

- `StatefulSetAutoDeletePVC` feature gate promoted to beta. ([#116501](https://github.com/kubernetes/kubernetes/pull/116501), [@mattcary](https://github.com/mattcary))
- `StatefulSet` names must be DNS labels, rather than subdomains. Any `StatefulSet`
  which took advantage of subdomain validation (by having dots in the name) can't
  possibly have worked, because we eventually set `pod.spec.hostname` from the `StatefulSetName`,

- Fixes a panic in kube-controller-manager handling StatefulSet objects when revisionHistoryLimit is negative ([#129325](https://github.com/kubernetes/kubernetes/pull/129325), [@ardaguclu](https://github.com/ardaguclu)) [SIG Apps]

* fixes a validation error that could prevent updates to StatefulSet objects containing non-normalized resource requests ([#66165](https://github.com/kubernetes/kubernetes/pull/66165), [@liggitt](https://github.com/liggitt))

- Fix nil pointer dereference in azure cloud provider ([#85975](https://github.com/kubernetes/kubernetes/pull/85975), [@ldx](https://github.com/ldx)) [SIG Cloud Provider]
- Fix regression in statefulset conversion which prevents applying a statefulset multiple times. ([#87706](https://github.com/kubernetes/kubernetes/pull/87706), [@liggitt](https://github.com/liggitt)) [SIG Apps and Testing]

- Fix regression in statefulset conversion which prevented applying a statefulset multiple times. ([#87721](https://github.com/kubernetes/kubernetes/pull/87721), [@liggitt](https://github.com/liggitt)) [SIG Apps and Testing]

- fix rollout status for statefulsets ([#62943](https://github.com/kubernetes/kubernetes/pull/62943), [@faraazkhan](https://github.com/faraazkhan))
- fixes a validation error that could prevent updates to StatefulSet objects containing non-normalized resource requests ([#66165](https://github.com/kubernetes/kubernetes/pull/66165), [@liggitt](https://github.com/liggitt))

- StatefulSet pods now have the pod index set as a pod label `statefulset.kubernetes.io/pod-index`. ([#119232](https://github.com/kubernetes/kubernetes/pull/119232), [@danielvegamyhre](https://github.com/danielvegamyhre)) [SIG Apps]

  - Published OpenAPI for the StatefulSet schema is corrected to indicate the `.spec.serviceName` is optional. ([#130233](https://github.com/kubernetes/kubernetes/pull/130233), [@soltysh](https://github.com/soltysh)) [SIG API Machinery, Apps and Testing]

- Add `PersistentVolumeClaimDeletePoilcy` to StatefulSet API. ([#99378](https://github.com/kubernetes/kubernetes/pull/99378), [@mattcary](https://github.com/mattcary))