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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>
164 lines
7.9 KiB
Markdown
164 lines
7.9 KiB
Markdown
# Performance Baseline — Veza API
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**Version** : v0.951
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**Objectif** : Documenter les latences P50/P95/P99 des endpoints critiques pour détecter les régressions.
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## Méthodologie
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1. Démarrer l'API en mode profiling : `pprof` est exposé si `ENABLE_PPROF=true`
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2. Exécuter un load test (k6 ou Go) sur les endpoints critiques
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3. Mesurer latences via Prometheus (`http_request_duration_seconds`) ou pprof
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## Endpoints critiques à monitorer
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| Endpoint | Méthode | Description |
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|----------|---------|-------------|
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| `/api/v1/auth/login` | POST | Login utilisateur |
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| `/api/v1/auth/register` | POST | Inscription |
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| `/api/v1/tracks` | GET | Liste des tracks (cursor pagination v0.931) |
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| `/api/v1/tracks/search` | GET | Recherche |
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| `/api/v1/users/me` | GET | Profil utilisateur |
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| `/api/v1/marketplace/orders` | POST | Création commande |
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| `/api/v1/notifications` | GET | Notifications |
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| `/api/v1/conversations` | GET | Conversations |
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| `/api/v1/analytics/me` | GET | Analytics |
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| `/health` | GET | Health check |
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## Cibles v1.0 (v0.951)
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- **P99 < 500ms** sur tous les endpoints critiques à 500 req/s (stress_500rps.js)
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- **1000 WebSocket** : connexions stables 5 min, taux livraison > 99% (stress_1000ws.js)
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- **50 uploads concurrents** : tous réussis, backpressure respecté (uploads.js)
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- **GET /tracks** : pagination cursor-based (v0.931) garantit des performances constantes quelle que soit la page
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## Scripts k6 v0.951
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| Script | Commande | Seuils |
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|--------|----------|--------|
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| API stress 500 VUs | `k6 run loadtests/backend/stress_500rps.js` | P99 < 500ms (login, tracks, search, products) |
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| WebSocket 1000 | `k6 run loadtests/chat/stress_1000ws.js` | ws_connection_failures < 1%, ws_message_failures < 1% |
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| Uploads 50 | `k6 run loadtests/backend/uploads.js` | P95 < 5s (simple), P95 < 8s (chunked) |
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Voir [loadtests/README.md](../loadtests/README.md) pour l'exécution complète.
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## Commande pprof
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```bash
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# Profiler 30s pendant un load test
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go tool pprof -http=:8081 http://localhost:8080/debug/pprof/profile?seconds=30
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```
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## Métriques Prometheus
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Les middlewares de monitoring exposent `http_request_duration_seconds` avec les labels `method`, `path`, `status`. Utiliser des histogram quantiles pour P50/P95/P99.
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## Lighthouse v0.982 (Frontend)
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**Objectif** : Performance ≥ 90, Accessibility ≥ 90, Best Practices ≥ 90 sur les pages critiques.
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### Pages à auditer
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| Page | Route | Cible Performance | Cible Accessibility |
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|------|-------|-------------------|---------------------|
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| Login | `/login` | ≥ 90 | ≥ 90 |
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| Dashboard | `/dashboard` | ≥ 90 | ≥ 90 |
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| Tracks | `/library` ou `/tracks` | ≥ 90 | ≥ 90 |
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| Marketplace | `/marketplace` | ≥ 90 | ≥ 90 |
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| Search | `/search` | ≥ 90 | ≥ 90 |
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| Profile | `/profile` | ≥ 90 | ≥ 90 |
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### Procédure d'audit
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```bash
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# Prérequis: app frontend en cours d'exécution (npm run dev ou build + preview)
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npx lighthouse http://localhost:4173/ --view --output=html --output-path=./lighthouse-reports/home.html
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npx lighthouse http://localhost:4173/login --view --output=html --output-path=./lighthouse-reports/login.html
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# Répéter pour chaque page critique
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```
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### Dernier audit
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Voir [config/incus/LIGHTHOUSE_AUDIT_REPORT.md](../config/incus/LIGHTHOUSE_AUDIT_REPORT.md) pour le dernier rapport (2026-01-15). Accessibility 93, Best Practices 96 — objectif v0.982 atteint sur ces critères. Performance à revalider après corrections NO_LCP.
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---
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## Résultats v1.0.2
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**Prérequis** : `docker compose up -d`, backend + PostgreSQL + Redis.
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### Load tests corrigés (v0.502)
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- WebSocket load test : CHAT_ORIGIN pointant vers backend `ws://localhost:8080`, WS_URL = `/api/v1/ws`
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- Fichiers : `loadtests/config.js`, `loadtests/chat/stress_1000ws.js`, `loadtests/chat/websocket.js`
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### Commandes pour exécution
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```bash
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k6 run loadtests/backend/stress_500rps.js # 500 req/s, P99 < 500ms
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k6 run loadtests/chat/stress_1000ws.js # 1000 WebSocket, < 1% échec
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k6 run loadtests/backend/uploads.js # 50 uploads
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```
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### Tableau résultats (à remplir après exécution sur infra)
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| Endpoint / Script | P50 | P95 | P99 | Taux échec |
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|------------------|-----|-----|-----|------------|
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| stress_500rps (login, tracks, search) | | | | |
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| stress_1000ws | | | | |
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| uploads | | | | |
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---
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## v1.0.9 W4 Day 20 — Mixed-scenarios nightly k6
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Capacity gate before launch : sustain **1650 VU concurrent** for 5 minutes on staging without breaking the global thresholds. Scheduled by `.github/workflows/loadtest.yml` at 02:30 UTC ; the acceptance bar is "3 nuits consécutives green" before the launch goes hot.
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### Scenarios
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Run in parallel via the k6 scenarios block in `scripts/loadtest/k6_mixed_scenarios.js`. Each one uses `executor: constant-vus` so the steady state is unambiguous.
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| Scenario | VU | Workload | Per-scenario p95 gate |
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| ---------- | ---- | ----------------------------------------------------- | --------------------- |
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| upload | 100 | initiate + 10×1 MiB chunks (synthetic 10 MiB tracks) | global only |
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| streaming | 500 | master.m3u8 → quality playlist → 4 segments loop | < 300 ms |
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| browse | 1000 | search 60% / list 30% / detail 10% | < 400 ms |
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| checkout | 50 | list products → POST orders (rejected at validation) | < 800 ms |
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### Global thresholds (acceptance bar)
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| Metric | Threshold | Reason |
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| -------------------- | -------------------- | ------------------------------------------------- |
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| `http_req_duration` | p(95) < 500 ms | Roadmap §Day 20. |
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| `http_req_duration` | p(99) < 1500 ms | Tail latency cap ; catches one-off sync stalls. |
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| `http_req_failed` | rate < 0.5 % | Roadmap §Day 20. Looser per-scenario for upload + checkout (network + Hyperswitch). |
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### How to run locally
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```bash
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# Against the lab haproxy (no auth required for browse/streaming) :
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k6 run scripts/loadtest/k6_mixed_scenarios.js \
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--env BASE_URL=http://haproxy.lxd \
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--env STREAM_TRACK_ID=<seed-uuid> \
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--env DURATION=2m \
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--env UPLOAD_VUS=10 --env STREAM_VUS=50 --env BROWSE_VUS=100 --env CHECKOUT_VUS=5
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# Full nightly profile against staging :
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USER_TOKEN=$(./scripts/issue-loadtest-token.sh) \
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k6 run scripts/loadtest/k6_mixed_scenarios.js \
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--env BASE_URL=https://staging.veza.fr \
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--env STREAM_TRACK_ID=<seed-uuid> \
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--env USER_TOKEN="$USER_TOKEN"
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```
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### Operating notes
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- **Override per-scenario VU** with `UPLOAD_VUS`, `STREAM_VUS`, `BROWSE_VUS`, `CHECKOUT_VUS` env vars to dial the load down for local runs.
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- **Staging-only.** The workflow refuses to run against prod ; the `BASE_URL` is set from `vars.STAGING_BASE_URL` (or `DEFAULT_BASE_URL` env in the workflow) and never reads from a prod-shaped variable.
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- **Token rotation.** `STAGING_LOADTEST_TOKEN` is a long-lived token bound to a dedicated `loadtest@veza.music` user with role=user (no admin powers). Rotate quarterly.
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- **Upload scenario approximation.** The chunked endpoint expects multipart bodies ; for load shaping we POST raw 1 MiB chunks with the upload-id header. The cost path (auth + rate-limit + Redis state) is exercised correctly even though the resulting upload is rejected at the multipart parser.
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### After-run dashboard
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The Grafana dashboard `Veza API Overview` (config/grafana/dashboards/api-overview.json) carries the p95/p99 panels. Add the k6 run window via the timepicker to compare. The k6 JSON summary uploaded as a workflow artifact carries the per-scenario breakdown that the dashboard can't show directly.
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### Acceptance gate (W4 verification)
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- 3 consecutive nightly runs green (no threshold violation).
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- p95 < 500 ms on the global metric.
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- Per-scenario gates met for every flow.
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When the gate breaks, the workflow's "Annotate thresholds in summary" step writes the failing values to the GitHub Actions summary so the on-call can triage from a single page.
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