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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>
28 lines
1.2 KiB
Django/Jinja
28 lines
1.2 KiB
Django/Jinja
# Managed by Ansible — do not edit by hand.
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# Sentinel config (rendered once at first boot ; sentinel rewrites
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# in-place after that to record discovered topology).
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bind {{ redis_bind }}
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port {{ redis_sentinel_port }}
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daemonize no
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supervised systemd
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protected-mode {{ redis_protected_mode }}
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requirepass {{ redis_sentinel_password }}
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# `monitor <name> <host> <port> <quorum>`
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# host = bootstrap master ; sentinel discovers replicas via INFO REPLICATION
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sentinel monitor {{ redis_master_name }} {{ groups['redis_ha_master'][0] }}.lxd {{ redis_port }} {{ redis_sentinel_quorum }}
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sentinel auth-pass {{ redis_master_name }} {{ redis_password }}
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# Failover thresholds (Day 11 acceptance : promotion < 30s).
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sentinel down-after-milliseconds {{ redis_master_name }} {{ redis_sentinel_down_after_ms }}
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sentinel parallel-syncs {{ redis_master_name }} 1
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sentinel failover-timeout {{ redis_master_name }} {{ redis_sentinel_failover_timeout_ms }}
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# Sentinel-to-Sentinel auth. Without this an attacker on the same Incus
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# bridge could register a phantom sentinel and trigger a split brain.
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sentinel sentinel-pass {{ redis_sentinel_password }}
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logfile /var/log/redis/redis-sentinel.log
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loglevel notice
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