Viktor asked to move the upgrade checks to weekly. With the actionable-vs-held
gate now quieting the routine 'held' churn (e.g. 1.36), a daily check + attempt
buys little; weekly is enough. Accepted trade-off: k8s patch (incl. security)
uptake now lags up to 7 days instead of <=1.
- var.schedule: 0 23 * * * -> 0 23 * * 0 (detector: weekly Sunday 23:00 UTC)
- var.report_schedule: 7 6 * * * -> 7 6 * * 1 (report: Monday 06:07 UTC, ~7h
after the Sunday check, so nightly-report.py's ~25h staleness threshold stays
valid AND still flags a missed weekly run; no STALE_SECONDS change needed)
The report CronJob keeps its historical name k8s-upgrade-nightly-report (rename
= churn). Cadence wording updated across main.tf comments, nightly-report.py
docstring, and the runbook.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The nightly upgrade chain detected 1.36, the preflight compat-gate refused it,
and that produced a Failed preflight Job + a K8sUpgradeBlocked alert EVERY
night — even though the block is unactionable (no kyverno/ESO release supports
1.36 yet, and gpu-operator is pinned to its current version because bumping it
needs a newer NVIDIA driver image + Ubuntu/kernel we're not ready for). Viktor
asked to teach the checker to tell 'we can fix this' apart from 'nothing to do
but wait', and stop the nightly Failed-Job + alert noise for the latter.
compat-gate.py now classifies each blocker:
- ACTIONABLE: a newer addon version in addon-compat.json supports the target
-> exit 2, k8s_upgrade_blocked=1 -> K8sUpgradeBlocked alert (reasons in the
nightly report).
- WAITING-on-upstream: no released version supports the target yet -> held.
- PINNED: addon marked pinned in the matrix (gpu-operator) -> held.
Held wins on a mix -> exit 4, k8s_upgrade_held=1 (NEW gauge), NO alert.
Tidy the block path (Viktor's scope choice): deliberate gate decisions now make
the preflight Job Complete cleanly (HALT_CHAIN stops chain progression without a
non-zero exit), so they no longer create Failed Jobs. Dropped the now-obsolete
'unless k8s_upgrade_blocked==1' suppression from K8sUpgradeChainJobFailed. Gauge
is pushed definitively once per run (no 1->0->1 flap that re-notifies). The
detector re-spawns a refused-but-Complete preflight nightly (silently) so a
standing hold still re-evaluates, and only announces genuine new/Failed spawns.
nightly-report gains a quiet '⏸️ HELD' headline with reasons grouped by class.
gpu-operator pinned in addon-compat.json (unpin = delete pinned + pin_reason).
Net effect on 1.36: HELD + quiet (waiting on kyverno/ESO, gpu-operator pinned;
Calico the lone actionable piece) — no nightly Failed Job, no alert, just the
morning report's HELD line. Design: docs/plans/2026-06-28-k8s-upgrade-gate-held-classification.md
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Adds a daily visibility layer so every night's autonomous-upgrade outcome is
reviewable at a glance during the upgrade-cleanup window (Viktor: "track every
night's upgrade for the next 7 days; clean up all bugs and blockers").
Last night (2026-06-20) confirmed BOTH prior fixes work in production: the
detector resolved target 1.35.6 (k8s_upgrade_available) and the compat gate
correctly REFUSED it (k8s_upgrade_blocked=1 -> K8sUpgradeBlocked) because ESO
v0.12 (<=1.31) and kyverno v1.16 (<=1.34) don't support 1.35.
What's here:
- CronJob k8s-upgrade-nightly-report (06:07 UTC) -> one Slack summary/morning:
running version, detector freshness, detected target, outcome (no-op /
blocked+live reasons / upgraded / in-progress / detector-stale), recent jobs.
Read-only: reads Pushgateway gauges + live nodes/jobs, re-runs compat-gate.py
for fresh blockers; reuses the chain SA + slack_webhook + scripts ConfigMap.
Pure helpers unit-tested (test_nightly_report.py, 8 cases incl. a real
v-prefix bug TDD caught). Verified end-to-end in-cluster (posted to Slack).
- K8sUpgradeChainJobFailed regex scoped from `k8s-upgrade-.*` to
`k8s-upgrade-(preflight|master|worker|postflight)-.*` so the new report job
(or any future helper) can't false-trip the chain-wedged alarm.
Manual state repair (no git artifact): imported the orphaned `alert-digest`
CronJob into the monitoring stack state
(`tg import module.monitoring.kubernetes_cron_job_v1.alert_digest monitoring/alert-digest`).
Root cause: when alert_digest was added (2026-06-12) the apply recorded its
ConfigMap + Secret but not the CronJob, so every full monitoring apply since has
failed with `cronjobs.batch "alert-digest" already exists` (Woodpecker pipeline
298 today) — surviving only via targeted prometheus applies. Now in state, so
monitoring CI applies cleanly again.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
