Refresh content for Kubernetes v1.37 (Garhwal) - #12
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Record the v1.37 (Garhwal) facts that the chapters cite, correct four entries that had drifted (HPA tolerance is GA, container restart rules are beta, server-side sharded list/watch is alpha and filters per replica, IPVS is deprecated), and keep the refresh plan as the record of the pass.
Pod certificates and ClusterTrustBundles, StorageVersionMigration, resilient watch-cache init, metrics.k8s.io v1, HPA scale to zero, Memory QoS, static pod API references, IPVS deprecation, SELinuxMount, DRA extended-resource bridge and device taints, in-tree gang scheduling (beta, gated off), node declared features. Correct the sharded list/watch description in ch02, ch06 and ch10. All chapters stay within their STYLE.md word budgets; no diagram changed.
Rename the split ServiceAccounts paragraph lead, put KYAML and PodCertificateRequest in alphabetical order, narrow the nftables netlink claim to what the release blog states, and bring ch09 back under its word budget.
The first mmdc call on a cold CI runner can hit puppeteer's 30 s launch timeout and fail only the first diagram. Set a 90 s launch timeout in the puppeteer config, retry each diagram once, and print the head of stderr so the real error is visible.
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What
Moves the book's baseline from v1.36 to v1.37 (released 2026-08-26).
Every change is a swap or a clause added where a chapter already made the claim;
no new flows, figures, or diagram edits.
Sources
Only kubernetes.io release and feature blogs, the v1.37 CHANGELOG, and the feature-gates reference.
Third-party summaries were rejected where they disagreed with the CHANGELOG.
Highlights
metrics.k8s.iov1, HPA scale to zero (beta, on by default), and per-HPA tolerance (GA) land in Flow 16 and Q 5.7.failCgroupV1land in Chapter 4..status.devices(all GA) extend Chapter 9.Corrections to existing text
the book called it beta and described it as cache partitioning across API replicas.
Checks
git diff -U0 chapters | grepfor diagram syntax prints nothing, so the diagram gate did not need to run.notes/v1.37-refresh-plan.mdrecords the pass;notes/research-notes.mdis the updated source of truth.Build
build/build.py: 90 s Puppeteer launch timeout and one retry per diagram.Two CI runs on this branch failed only on the first diagram, 30 s into the build,
which is Puppeteer's default launch timeout on a cold runner.
The run after this change passed with no retry needed.