[Special Interest Groups]: https://github.com/kubernetes/community/blob/master/sig-list.md

### SIG API Machinery

[SIG API Machinery][] is responsible for all aspects of the API server: API registration and discovery, generic API CRUD semantics, admission control, encoding/decoding, conversion, defaulting, persistence layer (etcd), OpenAPI, third-party resources, garbage collection, and client libraries.

* The implicit registration of Prometheus metrics for workqueue has been removed, and a plug-able interface was added. If you were using workqueue in your own binaries and want these metrics, add the following to your imports in the main package: "k8s.io/pkg/util/workqueue/prometheus"....

- Kubelet: added retry of checking Unix domain sockets on Windows nodes for the plugin registration mechanism. ([#110075](https://github.com/kubernetes/kubernetes/pull/110075), [@luckerby](https://github.com/luckerby))

- Fix a bug that a node Lease object may have been created without OwnerReference. ([#84998](https://github.com/kubernetes/kubernetes/pull/84998), [@wojtek-t](https://github.com/wojtek-t))
- External facing APIs in plugin registration and device plugin packages are now available under k8s.io/kubelet/pkg/apis/ ([#83551](https://github.com/kubernetes/kubernetes/pull/83551), [@dims](https://github.com/dims))
### Release

- Client-go: fixed the paged list calls with `ResourceVersionMatch` set would fail once paging is kicked in. ([#107311](https://github.com/kubernetes/kubernetes/pull/107311), [@fasaxc](https://github.com/fasaxc))
- Correct event registration for multiple scheduler plugins; this fixes a potential significant delay in re-queueing unschedulable pods. ([#109442](https://github.com/kubernetes/kubernetes/pull/109442), [@ahg-g](https://github.com/ahg-g))

* Fix registration for scheduling framework plugins with the default plugin set ([#72396](https://github.com/kubernetes/kubernetes/pull/72396), [@y-taka-23](https://github.com/y-taka-23))

* Make volume usage metrics available for Cinder ([#62668](https://github.com/kubernetes/kubernetes/pull/62668), [@zetaab](https://github.com/zetaab))

- Kubeadm: fixed a bug where the node registration information for a given node was not fetched correctly during "kubeadm upgrade node" and the node name can end up being incorrect in cases where the node name is not the same as the host name. ([#134363](https://github.com/kubernetes/kubernetes/pull/134363),...

- Kubeadm: fixed a bug where the node registration information for a given node was not fetched correctly during "kubeadm upgrade node" and the node name can end up being incorrect in cases where the node name is not the same as the host name. ([#134362](https://github.com/kubernetes/kubernetes/pull/134362),...

### Bug or Regression

- Correct event registration for multiple scheduler plugins; this fixes a potential significant delay in re-queueing unschedulable pods. ([#109446](https://github.com/kubernetes/kubernetes/pull/109446), [@ahg-g](https://github.com/ahg-g)) [SIG Scheduling and Testing]