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v2-akka-fuse .. 2c49f18442

Author SHA1 Message Date
Joseph Doherty 2c49f18442 Merge branch 'v2-akka-fuse' — Akka + fused-host v2 architecture
v2-ci / build (push) Failing after 44s
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129 commits implementing the v2 plan in full plus every load-bearing
follow-up. v2-akka-fuse is feature-complete and 210 tests green at
05a0596.

Architecture
- Single fused-host process (OtOpcUa.Host) replacing the v1 multi-process
  Server + Admin + Galaxy.Host split. Roles (admin, driver, historian)
  gate which Akka actors + ASP.NET surfaces wire up at boot.
- Akka.NET cluster (DistributedPubSub for fleet topics) with singleton
  AdminOperationsActor + ConfigPublishCoordinator on admin-role nodes;
  DriverHostActor + per-driver DriverInstanceActor + VirtualTagActor +
  ScriptedAlarmActor + OpcUaPublishActor on driver-role nodes.
- New AdminUI Razor class library (~42 pages, single-page edit-or-create
  + RowVersion concurrency) replaces the 47 legacy admin pages.

Production data path (end-to-end)
- ControlPlane composes deployment artifact → DistributedPubSub dispatch
  → DriverHostActor reconciles drivers → DriverInstanceActor binds real
  IDriver instances (read/subscribe/write) → AttributeValueUpdate flows
  to OpcUaPublishActor → SDK NodeManager writes visible to OPC UA
  clients with proper UNS Area/Line/Equipment folder hierarchy.

Security
- OPC UA transport: None / Basic256Sha256-Sign / SignAndEncrypt all
  exposed; auto-accept-untrusted-cert option for dev.
- LDAP-bound UserName auth via ImpersonateUser handler (same
  ILdapAuthService as Admin cookie/JWT).
- Cert auto-creation in PKI tree on first start.

Observability
- OtOpcUaTelemetry Meter + ActivitySource; 6 counters + histogram + 2
  spans across deploy / driver-lifecycle / virtual-tag-eval / alarm-
  transition / sink-write / service-level paths. Prometheus exporter
  mounted at /metrics.

Engines (production)
- RoslynVirtualTagEvaluator + RoslynScriptedAlarmEvaluator: compile
  user-script bodies through Core.Scripting sandbox, cache per
  expression, surface failures as Failure results without throwing.

Redundancy
- ServiceLevel through SdkServiceLevelPublisher → ServerObject.Service
  Level so clients see the real role-derived byte (240 primary-leader,
  100 secondary).

Tests
- 210 v2 tests across Cluster (15), ControlPlane (29), Runtime (74),
  Security (27), OpcUaServer (48), Host.IntegrationTests (26). Plus
  2-node integration harness covering deploy + failover scenarios.

See docs/plans/2026-05-26-akka-hosting-alignment-plan.md for the full
task list (66/66) and docs/plans/2026-05-26-akka-hosting-alignment-
design.md for the design.
 2026-05-26 11:00:53 -04:00
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