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R2: load-test harness + contour resource observability
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New scrabble/loadtest module (the pre-release stress harness): seeds 1000 guest +
10000 durable accounts with pre-created sessions directly in Postgres (token hash
matches backend/internal/session), drives virtual players through the edge protocol
(real 2-4p games assembled via invitations, mid-ranked legal moves generated locally
by the embedded scrabble-solver — the edge carries no board, so the client replays
history), plus nudge/chat/check-word/draft/profile/stats and a gateway-hammer that
verifies the rate limiter. Prints a trip-report summary (per-op latency percentiles,
result codes, live-event tally). Go unit tests cover the pure pieces; the DAWG-backed
move test runs under BACKEND_DICT_DIR.

Contour: add cAdvisor + postgres_exporter + a 'Scrabble - Resources' Grafana
dashboard and the two Prometheus scrape jobs, for the R2/R7 stress-run resource
baseline.

CI: gate ./loadtest/... (path filter + vet/build/test). Docs: TESTING, ARCHITECTURE,
project CLAUDE repo layout.
This commit is contained in:
Ilia Denisov
2026-06-09 23:45:24 +02:00
parent bf3ee62711
commit aa137e3558
27 changed files with 2554 additions and 7 deletions
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@@ -541,7 +541,11 @@ promotions) is future work and would deliver short markdown messages (text + lin
metrics + Tempo traces), **Prometheus** (15d), **Tempo** (72h) and **Grafana**
(provisioned datasources + dashboards, behind the caddy `/_gm/grafana` Basic-Auth)
are stood up with the deploy (`deploy/`, Stage 16); the default exporter stays
`none`, so CI needs no collector.
`none`, so CI needs no collector. The contour also runs **cAdvisor** (per-container
CPU/memory/network) and **postgres_exporter** (connections, cache-hit ratio,
transactions, db size), scraped by Prometheus and surfaced on the **Scrabble —
Resources** Grafana dashboard (R2), so the pre-release stress runs capture a resource
baseline; these export directly in Prometheus format (not through the collector).
- Per-request server-side timing via gin middleware from day one (the access log
carries method, route, status, latency and the active trace id). A
client-measured RTT piggybacked on the next request is a later enhancement.