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senke
59be60e1c3 feat(perf): k6 mixed-scenarios load test + nightly workflow + baseline doc (W4 Day 20)
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End of W4. Capacity validation gate before launch : sustain 1650 VU
concurrent (100 upload + 500 streaming + 1000 browse + 50 checkout)
on staging without breaking p95 < 500 ms or error rate > 0.5 %.
Acceptance bar : 3 nuits consécutives green.

- scripts/loadtest/k6_mixed_scenarios.js : 4 parallel scenarios via
  k6's executor=constant-vus. Per-scenario p95 thresholds layered on
  top of the global gate so a single-flow regression doesn't get
  masked. discardResponseBodies=true (memory pressure ; we assert
  on status codes + latency, not payload). VU counts overridable via
  UPLOAD_VUS / STREAM_VUS / BROWSE_VUS / CHECKOUT_VUS env vars for
  local runs.
  * upload     : 100 VU, initiate + 10 × 1 MiB chunks (10 MiB tracks).
  * streaming  : 500 VU, master.m3u8 → 256k playlist → 4 .ts segments.
  * browse     : 1000 VU, mix 60% search / 30% list / 10% detail.
  * checkout   : 50 VU, list-products + POST orders (rejected at
    validation — exercises auth + rate-limit + Redis state, doesn't
    burn Hyperswitch sandbox quota).

- .github/workflows/loadtest.yml : Forgejo Actions nightly cron
  02:30 UTC. workflow_dispatch lets the operator override duration
  + base_url for ad-hoc capacity drills. Pre-flight GET /api/v1/health
  aborts before consuming runner time when staging is already down.
  Artifacts : k6-summary.json (30d retention) + the script itself.
  Step summary annotates p95/p99 + failed rate so the Action listing
  shows the verdict at a glance.

- docs/PERFORMANCE_BASELINE.md §v1.0.9 W4 Day 20 : scenarios table,
  thresholds, local-run command, operating notes (token rotation,
  upload-scenario approximation, staging-only guard rail), Grafana
  cross-reference, acceptance gate spelled out.

Acceptance (Day 20) : workflow file is valid YAML ; k6 script parses
clean (Node test acknowledges k6/* imports as runtime-provided, the
rest of the syntax checks). Real green-night accumulation requires
the workflow running on staging — that's a deployment milestone, not
a code change.

W4 verification gate progress : Lighthouse PWA / HLS ABR / faceted
search / HAProxy failover / k6 nightly capacity all wired ; W4 = done.
W5 (pentest interne + game day + canary + status page) up next.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-29 11:44:06 +02:00