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ScadaBridge/docker/site-a-node-b/appsettings.Site.json
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{
"ScadaBridge": {
"Node": {
"Role": "Site",
"NodeName": "node-b",
"NodeHostname": "scadabridge-site-a-b",
"SiteId": "site-a",
"RemotingPort": 8082,
"GrpcPort": 8083,
"MetricsPort": 8084
},
"Cluster": {
"SeedNodes": [
"akka.tcp://scadabridge@scadabridge-site-a-b:8082",
"akka.tcp://scadabridge@scadabridge-site-a-a:8082"
],
"SplitBrainResolverStrategy": "auto-down",
"StableAfter": "00:00:15",
"HeartbeatInterval": "00:00:02",
"FailureDetectionThreshold": "00:00:10",
"MinNrOfMembers": 1,
"_bootstrapGuard": "Gitea #33 guard ENABLED on the docker rig (2026-08-02): deploy.sh recreates all containers simultaneously, which twice split site pairs into two 1-node clusters on 2026-08-01. Lower host:port founds self-first; the higher node TCP-probes then joins peer-first.",
"BootstrapGuard": {
"Enabled": true,
"PartnerProbeSeconds": 25,
"PartnerProbeIntervalMs": 500,
"ProbeConnectTimeoutMs": 1000
}
},
"Database": {
// Migration-only as of LocalDb Phase 2. The site config tables now live in the
// consolidated LocalDb database (LocalDb:Path). SiteDbPath is read once at boot to drain
// a pre-Phase-2 scadabridge.db, and is unused after that - keep it until this node has
// started once.
"SiteDbPath": "/app/data/scadabridge.db"
},
"DataConnection": {
"ReconnectInterval": "00:00:05",
"TagResolutionRetryInterval": "00:00:10",
"WriteTimeout": "00:00:30",
"SeedReadTimeout": "00:00:30"
},
"StoreAndForward": {
// Migration-only as of LocalDb Phase 2. The store-and-forward buffer now lives in the
// consolidated LocalDb database (LocalDb:Path) as the replicated sf_messages table.
// SqliteDbPath is read once at boot by SiteLocalDbLegacyMigrator to drain a pre-Phase-2
// file, and is unused after that - keep it until this node has started once.
"SqliteDbPath": "/app/data/store-and-forward.db"
},
"Communication": {
// DEV-ONLY control-plane preshared key — NOT a real secret. Must be
// IDENTICAL on both nodes of the pair and match the central-side entry in
// ScadaBridge__Communication__SitePsks__<siteId> (docker-compose.yml).
// Production supplies this as ${secret:SB-GRPC-PSK-<siteId>}. Without it the
// node fails StartupValidator: the gate is fail-closed, so an unset key would
// refuse every SiteStream call while the node still looked healthy.
"GrpcPsk": "dev-grpc-psk-docker-site-a",
"CentralGrpcEndpoints": [
"http://scadabridge-central-a:8083",
"http://scadabridge-central-b:8083"
],
"DeploymentTimeout": "00:02:00",
"LifecycleTimeout": "00:00:30",
"QueryTimeout": "00:00:30",
"TransportHeartbeatInterval": "00:00:05",
"TransportFailureThreshold": "00:00:15"
},
"HealthMonitoring": {
"ReportInterval": "00:00:30",
"OfflineTimeout": "00:01:00"
},
"SiteEventLog": {
"RetentionDays": 30,
"MaxStorageMb": 1024,
"PurgeScheduleCron": "0 2 * * *"
},
"Notification": {},
"Logging": {
"MinimumLevel": "Information"
}
},
// Consolidated site database (LocalDb Phase 1): OperationTracking + site_events.
// On the mounted /app/data volume so it survives container recreate - unlike the
// legacy site-tracking.db / site_events.db, which defaulted to CWD-relative paths
// outside the volume and were lost on every recreate.
// Replication is opt-in and configured separately; absent = local-only.
"LocalDb": {
"Path": "/app/data/site-localdb.db",
// The PASSIVE half of site-a's replicated pair: no PeerAddress, so this node's
// sync initiator starts and idles while node-a dials in. Its own writes still
// reach node-a - the stream is bidirectional.
//
// The key MUST match node-a's exactly. LocalDbSyncAuthInterceptor is
// fail-closed, so a typo here does not degrade to unauthenticated replication;
// it rejects every stream and the pair silently stops converging.
"Replication": {
"ApiKey": "dev-site-a-localdb-sync-key",
// ---- Phase 2 sizing, from the Task 1 rig soak (not from the defaults) ----
//
// The MaxBatchSize = 16 pin is RETIRED as of LocalDb 0.2.0 (arch-review WP3.3).
// It existed only as a hand-computed proxy for a byte budget: batching was
// row-count-only, and 70 KB of production config_json x the 500 default is
// ~35 MB against gRPC's 4 MB receive limit. The library now bounds a batch by
// MaxBatchBytes (default 2 MB of summed serialized size), with the row count
// demoted to a secondary cap, so both are left at their defaults here - a
// deliberately unset MaxBatchBytes is the 2 MB default, and the widest row no
// longer has to be guessed at deploy time.
//
// Backlog caps bound the oplog while the peer is offline. Exceeding them is
// NOT data loss: the oplog is pruned to the ceiling and needs_snapshot is set,
// so the peer catches up by snapshot resync instead of incrementally. That
// makes tighter-than-default correct here - it trades a rare full resync for a
// bounded file. Sized from the soak's 0.80 sf_messages rows/sec (the only
// non-zero writer measured): ~69k rows/day, so 2 days is ~138k. 250,000 leaves
// room for burst without approaching the 1,000,000 default.
"MaxOplogRows": 250000,
"MaxOplogAge": "2.00:00:00"
}
},
// arch-review remediation WP1.2: the site hot-path audit writer's SQLite file has no
// default path (mirrors LocalDb:Path above) and StartupValidator now requires it for
// Site nodes — an unset value used to fall back to a bare "auditlog.db" resolved
// relative to CWD, i.e. the container's ephemeral overlayfs, so the pending audit
// backlog was silently discarded on every recreate. On the mounted /app/data volume,
// same as LocalDb:Path, so it survives container recreate.
"AuditLog": {
"SiteWriter": {
"DatabasePath": "/app/data/auditlog.db"
}
}
}