Kubernetes 1.21 Release Cycle

[damemi]

• Monday, January 11th: Week 1 - Release cycle begins
• Tuesday, February 9th: Week 5 - Enhancements Freeze
• Tuesday, March 9th: Week 9 - Code Freeze
• Wednesday, March 24: Week 11 - Test Freeze
• Wednesday, March 31st: Week 12 - Docs must be completed and reviewed
• Thursday, April 8th: Week 13 - Kubernetes v1.21.0 released

Full release cycle calendar is available at https://github.com/kubernetes/sig-release/tree/master/releases/release-1.21

[seanmalloy]

Docs PR: #537

[damemi]

Thanks @seanmalloy, here's also a pre-bump to rc.0: #539

[damemi]

We may want to wait for the kind 1.21 image to be available before publishing the release (thanks for pointing that out @seanmalloy). This way our CI can run at least once to verify we are all good on the new version, and we can test that in @ingvagabund's e2e refactor pr #535

In the meantime, here are the draft release notes:

Container image for this release is available at: `k8s.gcr.io/descheduler/descheduler:v0.21.0`

The Helm chart for this release is published [here](https://github.com/kubernetes-sigs/descheduler/releases/tag/descheduler-helm-chart-0.20.0).

## New Features :rainbow:
* #468 Run as user 1000 so pod can be runAsNonRoot for security purposes @eatwithforks 
* #474 Add a parameter to include soft topology spread constraints @lixiang233 
* #481 Add option to ignore pods with PVCs from eviction @damemi 
* #480 Add nodeSelector to cronJob helm chart @damemi 
* #495 Update Job and CronJob YAML to run as non-root @seanmalloy 
* #496 Update Helm Chart to run as non-root @seanmalloy 
* #499 Bump To Go 1.15.8 @seanmalloy 
* #510 Filter pods by labelSelector @lixiang233 
* #505 Collect metrics @ingvagabund 
* #521 Enable ARM32v7 Container Image Builds @seanmalloy 
* #523 Added EvictSystemCriticalPods flag to descheduler @RyanDevlin 
* #434 Support extended resources in LowNodeUtilization @ZongqiangZhang 
* #547 Bump To k8s 1.21.0 @seanmalloy 

## Bug Fixes :bug:
* #484 Fix TopologySpread bug that evicts non-evictable pods @damemi 
* #493 Modify resourceUsage.Value() to resourceUsage.MilliValue() @fancc 
* #497 LowNodeUtilization: unit test resourceUsagePercentages to validate percentages are computed correctly @ingvagabund 
* #498 Fix indentation in values.yaml @kristinnardal2 
* #512 Bump github.com/gogo/protobuf to v1.3.2 @ingvagabund 
* #490 Add default logging-format value @damemi 
* #517 Correct log in topology spread strategy @lixiang233 
* #525 (TopologySpread) Evict pods with selectors that match multiple nodes @damemi 
* #526 Correct Helm Chart Docs For Container Requests and Limits @seanmalloy 
* #543 e2e_test: fix goroutine leak @gaurav1086 
* #544 LNU: improve nodeUsage logging @ingvagabund 

## Others :running:
* #471 refactor: remove unused code @Mathew857 
* #478 Update README.md @ryuichi1208 
* #482 Add Logging field to v1alpha1 componentconfig @damemi 
* #502 Move 'total pods evicted' log message to main loop @damemi 
* #504 Log and README optimization for LowNodeUtilization @lixiang233 
* #506 Update e2e tests to use kind v0.10.0 @seanmalloy 
* #515 Clarify resource percentage calculation in README @damemi 
* #518 Add table of contents generator/verify script @damemi 
* #520 Document That Descheduler Considers StatefulSets For Eviction @seanmalloy 
* #534 Use Tags In Kustomize Documentation @seanmalloy 
* #507 Add verify scripts for make gen to run during PR @pravarag 
* #545 Add verify script for deep-copies generator @pravarag 
* #546 Add diagram of strategies @ingvagabund
* #548 Updating policy api version used in pod evictor @lx1036 
* #537 Update Docs and Manifests for v0.21.0 @seanmalloy 
* #535 E2e refactor @ingvagabund 

[seanmalloy]

Looks like the current release of kind(0.10.0) is not able to create a k8s 1.21 cluster. We might need wait one or two weeks for the next kind release. See kubernetes-sigs/kind#2189 for details.

[damemi]

Update: the kind release is getting closer (kubernetes-sigs/kind#2024 (comment)). We can probably start opening the PRs to update our CI, they won't work yet but once the image is published then it should just be a /retest to get them going!

Sorry for the delay to anyone who's been eagerly awaiting the latest descheduler release

[seanmalloy]

Here are the PRs to add k8s 1.21 to CI with kind v0.11.0:

• Bump kind version #570
• Bump k8s Versions For Descheduler E2E Tests kubernetes/test-infra#22238