Week Ending May 30, 2021

Developer News

With sadness we report the passing of contributor Peeyush Gupta. Peeyush was a regular contributor in SIG-ContribEx and a member of the 1.22 Release Team. If you have remembrances of Peeyush to share, add them to the memorial page.

SIG-CLI would like to add a confirmation to cascading deletes in kubectl. This would be a breaking change, so please check out the proposal and the discussion.

Contributor Summit 2021 will likely be a “hybrid event”, but we need to know how many folks will be there in person vs. virtually. Please let the summit team know if you’re planning on going, and if so how.

Release Schedule

Next Deadline: Feature exceptions due, June 28th

Folks are hard at work coding and documenting their 1.22 features. Don’t forget about tests, though; currently we have 4 jobs flaking in master-blocking, and a whopping 14 jobs flaking or failing in master-informing. Let’s fix these now and not have code freeze be a grueling slog of test fail debugging.

Cherry-pick deadline for the next patch releases is June 12.

Featured PRs

#102343: Changes headers to remove “X-“ prefix (IETF deprecation)

An extremely-niche-but-technically-a-compat-change tweak, the telemetry headers sent from kubectl to kube-apiserver are being changed to match IETF recommendations. X-Kubectl-Command is now Kubectl-Command and X-Kubectl-Session is Kubectl-Session. If you have some homebrew audit logging system that uses these headers, now is your chance to tweak it.

#101742: Promote DS MaxSurge to beta

Many DaemonSets provide critical node-level functionality that can make upgrades tricky. If the previous rolling update behavior was “at most one”, by setting the new MaxSurge option you can instead get “at least one”. This may not apply in all cases but for situations where overlapping during upgrades is preferable to a tiny outage, consider investigating this new option.

Other Merges

Ala mode: Kubernetes official binaries now being compiled with -buildmode pie
StatefulSet pods get minReadySeconds API, and maxUnavailable, in time for the 3rd anniversary of the original issue
Feature gate added for the new Expanded DNS Configuration, which allows more DNS search path entries as allowed by newer libc versions
Garbage-collect PV migrations to CSI
client-go Watch and Stream actions have retry logic
kubectl top uses ProtoBufs instead of JSON for metrics
Retry cleanup if detaching a FiberChannel device fails
kubectl --sort-by Resources is less surprising
Windows NetworkPolicy gets some E2E tests

Deprecated

--algorithm-provider removed from Scheduler; use ComponentConfig to set the algo plugin instead

Version Updates

Official setcap image to Debian Buster-v2.0.1, but iptables image just to Buster 1.6.1
klog to 2.9.0 fixes binary data display issue
CNI plugins to v0.9.1

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