- Kube-proxy: delete stale conntrack UDP entries for loadbalancer ingress IP. ([#104151](https://github.com/kubernetes/kubernetes/pull/104151), [@aojea](https://github.com/aojea)) [SIG Network]

- Fix counting error in service/nodeport/loadbalancer quota check ([#97828](https://github.com/kubernetes/kubernetes/pull/97828), [@pacoxu](https://github.com/pacoxu)) [SIG API Machinery and Network]

  - [beta] Opt in source ip preservation for Services with Type NodePort or LoadBalancer ([docs](http://kubernetes.io/docs/tutorials/services/source-ip/)) ([kubernetes/features#27](https://github.com/kubernetes/enhancements/issues/27))

- Forbid to set matchLabelKeys when labelSelector is not set in topologySpreadConstraints ([#116535](https://github.com/kubernetes/kubernetes/pull/116535), [@denkensk](https://github.com/denkensk))
- GCE does not support LoadBalancer Services with ports with different protocols (TCP and UDP) ([#115966](https://github.com/kubernetes/kubernetes/pull/115966), [@aojea](https://github.com/aojea)) [SIG Apps and Cloud Provider]

* Fix panic in ControllerManager on GCE when it has a problem with creating external loadbalancer healthcheck ([#52646](https://github.com/kubernetes/kubernetes/pull/52646), [@gmarek](https://github.com/gmarek))

* Services of type=LoadBalancer which have no endpoints will now immediately ICMP reject connections, rather than time out. ([#74394](https://github.com/kubernetes/kubernetes/pull/74394), [@thockin](https://github.com/thockin))

  * **alpha**: NVIDIA GPU support ([#24836](https://github.com/kubernetes/kubernetes/pull/24836), [@therc](https://github.com/therc))
  * Adding loadBalancer services and nodeports services to quota system

## Known Issues and Important Steps before Upgrading

- Fixed the following 
  -  AWS Cloud Provider attempts to delete LoadBalancer security group it didn’t provision

* Fix a scalability issue where high rates of event writes degraded etcd performance. ([#64539](https://github.com/kubernetes/kubernetes/pull/64539), [@ccding](https://github.com/ccding))
* Properly manage security groups for loadbalancer services on OpenStack. ([#65373](https://github.com/kubernetes/kubernetes/pull/65373), [@multi-io](https://github.com/multi-io))

* azure: add PrimaryAvailabilitySet to config, only use nodes in that set in the loadbalancer pool ([#34526](https://github.com/kubernetes/kubernetes/pull/34526), [@colemickens](https://github.com/colemickens))