The CustomCFSQuotaPeriod alpha feature enables node administrators to change the default period used to enforce CFS quota on a node.  This can improve performance for some workloads that experience latency while using CFS quota with the default measurement period.  Finally, the SIG continues to focus on improving reliability by fixing bugs while working out design and implementation of future features.

## Changelog since v1.8.7

### Other notable changes

* Configurable etcd quota backend bytes in GCE ([#59259](https://github.com/kubernetes/kubernetes/pull/59259), [@wojtek-t](https://github.com/wojtek-t))

## 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]

- Fix counting error in service/nodeport/loadbalancer quota check ([#97829](https://github.com/kubernetes/kubernetes/pull/97829), [@pacoxu](https://github.com/pacoxu)) [SIG API Machinery and Network]

* kubelet initial flag parse now normalizes flags instead of exiting.  ([#61053](https://github.com/kubernetes/kubernetes/pull/61053), [@andrewsykim](https://github.com/andrewsykim))

* Fixed regression where kubelet --cpu-cfs-quota flag did not work when --cgroups-per-qos was enabled ([#61294](https://github.com/kubernetes/kubernetes/pull/61294), [@derekwaynecarr](https://github.com/derekwaynecarr))

* kube-controller-manager can now start the quota controller when discovery results can only be partially determined. ([#67433](https://github.com/kubernetes/kubernetes/pull/67433), [@deads2k](https://github.com/deads2k))

### API Change

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

* You now have the ability to quota resources by priority. ([#57963](https://github.com/kubernetes/kubernetes/pull/57963), [@vikaschoudhary16](https://github.com/vikaschoudhary16))

  * **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

if supported by the kernel. You should either adjust your CPU limit, or set CPU
request only, if you want to avoid hardcapping. If the kernel does not support
CPU Quota, NodeStatus will contain a warning indicating that CPU Limits cannot
be enforced.