* Moved qos to api.helpers. ([#44906](https://github.com/kubernetes/kubernetes/pull/44906), [@k82cn](https://github.com/k82cn))

* Fix issue with the resource quota controller causing add quota to be resynced at the wrong ([#45685](https://github.com/kubernetes/kubernetes/pull/45685), [@derekwaynecarr](https://github.com/derekwaynecarr))

### API Change

- 1. PodAffinityTerm includes a namespaceSelector field to allow selecting eligible namespaces based on their labels. 

* Azure cloudprovider: Reduce the polling delay for all azure clients to 5 seconds. This should speed up some operations at the cost of some additional quota. ([#43699](https://github.com/kubernetes/kubernetes/pull/43699), [@colemickens](https://github.com/colemickens))

- The `podAffinity`, `NamespaceSelector` and the associated `CrossNamespaceAffinity` quota scope features graduate to Beta and they are now enabled by default. ([#101496](https://github.com/kubernetes/kubernetes/pull/101496), [@ahg-g](https://github.com/ahg-g))

## Changelog since v1.17.16

## Changes by Kind

### Bug or Regression

- Fix counting error in service/nodeport/loadbalancer quota check ([#97830](https://github.com/kubernetes/kubernetes/pull/97830), [@pacoxu](https://github.com/pacoxu)) [SIG API Machinery and Network]

- Kubelet: Fix fs quota monitoring on volumes ([#116793](https://github.com/kubernetes/kubernetes/pull/116793), [@pacoxu](https://github.com/pacoxu)) [SIG Storage]

## Dependencies

### Added
_Nothing has changed._

### Changed

	if opts.bucket == "" {
		return fmt.Errorf("bucket name is empty")
	}
	if opts.arn == "" {
		return fmt.Errorf("target ARN specified for resync is empty")
	}
	// Check if the current bucket has quota restrictions, if not skip it
	cfg, err := getReplicationConfig(ctx, opts.bucket)
	if err != nil {
		return err
	}
	tgtArns := cfg.FilterTargetArns(
		replication.ObjectOpts{

- Fixed panic of Evented `PLEG` during kubelet start-up. ([#122475](https://github.com/kubernetes/kubernetes/pull/122475), [@pacoxu](https://github.com/pacoxu))
- Fixed resource deletion failure caused by quota calculation error when `InPlacePodVerticalScaling` is turned on. ([#122701](https://github.com/kubernetes/kubernetes/pull/122701), [@carlory](https://github.com/carlory))

- Fix: Route controller should update routes with NodeIP changed ([#116360](https://github.com/kubernetes/kubernetes/pull/116360), [@lzhecheng](https://github.com/lzhecheng)) [SIG Cloud Provider]
- Kubelet: Fix fs quota monitoring on volumes ([#116795](https://github.com/kubernetes/kubernetes/pull/116795), [@pacoxu](https://github.com/pacoxu)) [SIG Storage]

### Other (Cleanup or Flake)

    * The `admissionregistration.k8s.io/v1beta1` versions of `MutatingWebhookConfiguration` and `ValidatingWebhookConfiguration` are deprecated and will no longer be served in v1.19.
* The garbage collector and generic object quota controller have been updated to use the metadata client which improves memory ([#78742](https://github.com/kubernetes/kubernetes/pull/78742), [@smarterclayton](https://github.com/smarterclayton))