veza/veza-backend-api/internal/websocket/chat
senke a36d9b2d59
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feat(redis): Sentinel HA + cache hit rate metrics (W3 Day 11)
Three Incus containers, each running redis-server + redis-sentinel
(co-located). redis-1 = master at first boot, redis-2/3 = replicas.
Sentinel quorum=2 of 3 ; failover-timeout=30s satisfies the W3
acceptance criterion.

- internal/config/redis_init.go : initRedis branches on
  REDIS_SENTINEL_ADDRS ; non-empty -> redis.NewFailoverClient with
  MasterName + SentinelAddrs + SentinelPassword. Empty -> existing
  single-instance NewClient (dev/local stays parametric).
- internal/config/config.go : 3 new fields (RedisSentinelAddrs,
  RedisSentinelMasterName, RedisSentinelPassword) read from env.
  parseRedisSentinelAddrs trims+filters CSV.
- internal/metrics/cache_hit_rate.go : new RecordCacheHit / Miss
  counters, labelled by subsystem. Cardinality bounded.
- internal/middleware/rate_limiter.go : instrument 3 Eval call sites
  (DDoS, frontend log throttle, upload throttle). Hit = Redis answered,
  Miss = error -> in-memory fallback.
- internal/services/chat_pubsub.go : instrument Publish + PublishPresence.
- internal/websocket/chat/presence_service.go : instrument SetOnline /
  SetOffline / Heartbeat / GetPresence. redis.Nil counts as a hit
  (legitimate empty result).
- infra/ansible/roles/redis_sentinel/ : install Redis 7 + Sentinel,
  render redis.conf + sentinel.conf, systemd units. Vault assertion
  prevents shipping placeholder passwords to staging/prod.
- infra/ansible/playbooks/redis_sentinel.yml : provisions the 3
  containers + applies common baseline + role.
- infra/ansible/inventory/lab.yml : new groups redis_ha + redis_ha_master.
- infra/ansible/tests/test_redis_failover.sh : kills the master
  container, polls Sentinel for the new master, asserts elapsed < 30s.
- config/grafana/dashboards/redis-cache-overview.json : 3 hit-rate
  stats (rate_limiter / chat_pubsub / presence) + ops/s breakdown.
- docs/ENV_VARIABLES.md §3 : 3 new REDIS_SENTINEL_* env vars.
- veza-backend-api/.env.template : 3 placeholders (empty default).

Acceptance (Day 11) : Sentinel failover < 30s ; cache hit-rate
dashboard populated. Lab test pending Sentinel deployment.

W3 verification gate progress : Redis Sentinel ✓ (this commit),
MinIO EC4+2  Day 12, CDN  Day 13, DMCA  Day 14, embed  Day 15.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-28 13:36:55 +02:00
..
benchmark_test.go v0.9.8 2026-03-06 19:13:16 +01:00
client.go feat(chat): Sprint 2 -- WebSocket hub, client, message types, route 2026-02-22 20:41:39 +01:00
handler.go v0.9.6 2026-03-06 10:29:30 +01:00
handler_calls.go feat(chat): Sprint 3 -- message handlers, real-time features, permissions 2026-02-22 20:43:44 +01:00
handler_history.go v0.9.7 2026-03-06 18:52:08 +01:00
handler_messages.go feat(v0.10.6): Livestreaming basique F471-F476 2026-03-10 10:21:57 +01:00
handler_messages_test.go fix(backend): synchronous Hub.Shutdown to eliminate goleak failures 2026-04-14 11:44:27 +02:00
handler_realtime.go v0.9.6 2026-03-06 10:29:30 +01:00
handler_realtime_test.go test(chat): Sprint 5 -- unit tests, E2E tests, feature parity validation 2026-02-22 20:49:32 +01:00
handler_rooms.go feat(chat): Sprint 3 -- message handlers, real-time features, permissions 2026-02-22 20:43:44 +01:00
hub.go fix(backend): synchronous Hub.Shutdown to eliminate goleak failures 2026-04-14 11:44:27 +02:00
hub_test.go v0.9.8 2026-03-06 19:13:16 +01:00
messages.go style(backend): gofmt -w on 85 files (whitespace only) 2026-04-14 12:22:14 +02:00
permissions.go feat(v0.10.6): Livestreaming basique F471-F476 2026-03-10 10:21:57 +01:00
presence_service.go feat(redis): Sentinel HA + cache hit rate metrics (W3 Day 11) 2026-04-28 13:36:55 +02:00
presence_service_test.go feat(chat): Redis rate limiter, persistent presence, PostgreSQL full-text search 2026-02-22 21:17:51 +01:00
rate_limiter.go feat(v0.10.6): Livestreaming basique F471-F476 2026-03-10 10:21:57 +01:00
rate_limiter_test.go feat(chat): Redis rate limiter, persistent presence, PostgreSQL full-text search 2026-02-22 21:17:51 +01:00