* new dhcp-domain parameter to be used for figuring out the hostname of a node ([#61890](https://github.com/kubernetes/kubernetes/pull/61890), [@dims](https://github.com/dims))
* Disable ipamperf integration tests as part of every PR verification. ([#61863](https://github.com/kubernetes/kubernetes/pull/61863), [@satyasm](https://github.com/satyasm))

### Kubernetes Node system swap support

* Adds the Categories []string field to API resources, which represents the list of group aliases (e.g. "all") that every resource belongs to. ([#43338](https://github.com/kubernetes/kubernetes/pull/43338), [@fabianofranz](https://github.com/fabianofranz))

- Fix kubelet NodeLease potential performance issues. Kubelet now will try to update lease using cached one instead of get from API Server every time. ([#81174](https://github.com/kubernetes/kubernetes/pull/81174), [@answer1991](https://github.com/answer1991))

liability for other Contributors. Therefore, if a Contributor includes
the Program in a commercial product offering, such Contributor
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- Fix: The volume is not detached after the pod and PVC objects are deleted. ([#116138](https://g...

* Fixes a bug in HPA controller so HPAs are always updated every resyncPeriod (15 seconds). ([#72373](https://github.com/kubernetes/kubernetes/pull/72373), [@krzysztof-jastrzebski](https://github.com/krzysztof-jastrzebski))

* Fix GCI mounter issue ([#38124](https://github.com/kubernetes/kubernetes/pull/38124), [@jingxu97](https://github.com/jingxu97))
* Kubelet will no longer set hairpin mode on every interface on the machine when an error occurs in setting up hairpin for a specific interface. ([#36990](https://github.com/kubernetes/kubernetes/pull/36990), [@bboreham](https://github.com/bboreham))

* Adds the `Categories []string` field to API resources, which represents the list of group aliases (e.g. "all") that every resource belongs to.  ([#43338](https://github.com/kubernetes/kubernetes/pull/43338), [@fabianofranz](https://github.com/fabianofranz))

- Fixed kubelet startup getting stuck with `NewVolumeManagerReconstruction` feature enabled and a...