- Fixing issue with Winkernel Proxier - ClusterIP Loadbalancers are missing if the ExternalTrafficPolicy is set to Local and the available endpoints are all remoteEndpoints. ([#115999](https://github.com/kubernetes/kubernetes/pull/115999), [@princepereira](https://github.com/princepereira)) [SIG Network]

- Migrate pkg/kubelet/util to structured logging ([#99823](https://github.com/kubernetes/kubernetes/pull/99823), [@navidshaikh](https://github.com/navidshaikh)) [SIG Instrumentation and Node]
- Migrate proxy/userspace/proxier.go logs to structured logging ([#97837](https://github.com/kubernetes/kubernetes/pull/97837), [@JornShen](https://github.com/JornShen)) [SIG Network]

* Removed some redundant rules created by the iptables proxier to improve performance on systems with very many services. ([#57461](https://github.com/kubernetes/kubernetes/pull/57461), [@danwinship](https://github.com/danwinship))

* Fix a bug in server printer that could cause kube-apiserver to panic. ([#79349](https://github.com/kubernetes/kubernetes/pull/79349), [@roycaihw](https://github.com/roycaihw))
* Fix a bug in the IPVS proxier where virtual servers are not cleaned up even though the corresponding Service object was deleted. ([#80942](https://github.com/kubernetes/kubernetes/pull/80942), [@gongguan](https://github.com/gongguan))

  The API Server will no longer proxy non-101 responses for upgrade requests. This could break proxied backends (such as an extension API server) that respond to upgrade requests with a non-101 response code. ([#92941](https://github.com/kubernetes/kubernetes/pull/92941), [@tallclair](https://github.com/tallclair)) [SIG API Machinery]

  correctly with an external cloud provider. ([#124516](https://github.com/kubernetes/kubernetes/pull/124516), [@danwinship](https://github.com/danwinship))
- Fixed an issue that prevents the linking of trace spans for requests that are proxied through kube-aggregator. ([#124189](https://github.com/kubernetes/kubernetes/pull/124189), [@toddtreece](https://github.com/toddtreece))

## Changes by Kind

### Deprecation

- A deprecation notice has been added when using the kube-proxy userspace proxier, which will be removed in v1.25. (#103860) ([#104631](https://github.com/kubernetes/kubernetes/pull/104631), [@perithompson](https://github.com/perithompson))

- Migrate `proxy/ipvs/proxier.go` logs to structured logging. ([#97796](https://github.com/kubernetes/kubernetes/pull/97796), [@JornShen](https://github.com/JornShen))

## Changelog since v1.12.1

### Other notable changes

* IPVS proxier mode now support connection based graceful termination. ([#66012](https://github.com/kubernetes/kubernetes/pull/66012), [@Lion-Wei](https://github.com/Lion-Wei))

* Fix port number and default Stackdriver Metadata Agent in daemon set configuration. ([#56576](https://github.com/kubernetes/kubernetes/pull/56576), [@kawych](https://github.com/kawych))
* Declare ipvs proxier beta ([#56623](https://github.com/kubernetes/kubernetes/pull/56623), [@m1093782566](https://github.com/m1093782566))