c2abbf45bd
Driver.Galaxy-015, -016, -017, -018 resolution (one logical change set).
Driver.Galaxy-016 (Medium, Perf/Resource):
Reconciled the csproj PackageReferences with what the vendored
MxGateway.Client.dll was actually built against, verified by
reflecting Assembly.GetReferencedAssemblies() on the DLL:
- Polly 8.5.2 → Polly.Core 8.6.6
(most consequential — Polly v7 fluent API vs Polly.Core v8
resilience-pipeline API are DIFFERENT packages; the DLL was
built against Polly.Core so the prior Polly reference would
have failed at runtime with MissingMethodException the first
time the gateway client's retry pipeline ran)
- Grpc.Net.Client 2.71.0 → 2.76.0 (matches sibling Server/Worker)
- Microsoft.Extensions.Logging.Abstractions 10.0.0 → 10.0.7
Google.Protobuf 3.34.1 and Grpc.Core.Api 2.76.0 already matched —
left unchanged.
Driver.Galaxy-015 (re-triaged from Medium-Security → Low-Documentation):
Original framing was a security concern about unknown-provenance
binaries. User clarified the DLLs are their own code, built from
their own mxaccessgw project, not third-party. Re-triaged to a
documentation / audit-trail concern. Fix:
- Added a Provenance section to libs/README.md recording the
source-commit SHA (dd7ca1634e2d2b8a866c81f0009bf87ee9427750,
extracted from the AssemblyInformationalVersion baked into
both DLLs by the original build) and SHA-256 checksums.
- Documented the re-verification recipe (sha256sum + ilspycmd
| grep AssemblyInformationalVersion).
Recommendations about .gitattributes and CI hash-check deferred —
the DLLs are frozen until an unwinding path is taken, so adding
LFS or CI infrastructure now would need removal at unwinding.
Driver.Galaxy-018 (Low, Documentation):
Most of the recommendation folded into the libs/README.md rewrite
(pointed at sibling Server/Worker csproj as the live version source
rather than the deleted MxGateway.Client.csproj; recorded source
commit + SHA-256). <SpecificVersion>false</SpecificVersion> on the
<Reference> items intentionally not added — MSBuild's default for
HintPath references with bare-name Include attributes is already
SpecificVersion=false, so explicitly setting it would be cosmetic
without changing behaviour.
Driver.Galaxy-017 (Low, Design) — Deferred:
Recommendation part (b) (record mxaccessgw source-commit SHA in
libs/README.md) is satisfied by Driver.Galaxy-015's resolution.
Parts (a) and (c) — a GetVersion RPC at session-open and a parity
test against the live gateway's proto descriptor — are substantial
new RPC + plumbing work not in scope for this code-review sweep.
The risk surface is bounded because either of the libs/README.md
unwinding paths closes the vendoring + this concern naturally.
Re-open if neither path is taken within the next quarter and the
live gateway evolves its proto under the driver.
Verification:
- Build clean (Driver.Galaxy.csproj 0 errors, 0 warnings).
- Driver.Galaxy.Tests: 245/245 pass against the corrected
package set.
- Solution-wide build remains clean.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
OtOpcUa
OPC UA server (.NET 10 AnyCPU) that exposes a fleet of industrial drivers as a single OPC UA address space. Drivers ship in-process for AVEVA System Platform Galaxy (via the sibling mxaccessgw repo), Modbus TCP, Siemens S7, Allen-Bradley CIP (ControlLogix / CompactLogix), Allen-Bradley Legacy (SLC 500 / MicroLogix), Beckhoff TwinCAT (ADS), FANUC FOCAS, and OPC UA Client (gateway).
A cross-platform client stack (.NET 10) — shared library, CLI, and Avalonia desktop app — connects to any OPC UA server.
Architecture
OPC UA Clients (CLI, Desktop UI, 3rd-party)
|
v
+-------------------------------------+
| OtOpcUa.Server (.NET 10 AnyCPU) |
| address space + capability fan-out|
+-------------------------------------+
| | | | | | | |
Galaxy Modbus S7 AbCip AbLeg TwinCAT FOCAS OpcUaClient
|
v
mxaccessgw (sibling repo, gRPC)
|
v
MXAccess COM (x86 worker, on AVEVA box)
Galaxy is the only driver with an external runtime: it speaks gRPC to a separately installed mxaccessgw server (sibling repo at c:\Users\dohertj2\Desktop\mxaccessgw\) which owns the MXAccess COM apartment and the x86/STA bitness constraint server-side. Everything in this repo is platform-agnostic .NET 10.
Prerequisites
- .NET 10 SDK (server, drivers, clients all target .NET 10)
- SQL Server reachable for the central config DB
- For Galaxy specifically: a running
mxaccessgwdeployment — see docs/v2/Galaxy.ParityRig.md - For Wonderware Historian read-back: optional
OtOpcUaWonderwareHistoriansidecar — see docs/ServiceHosting.md
Quick Start
dotnet restore ZB.MOM.WW.OtOpcUa.slnx
dotnet build ZB.MOM.WW.OtOpcUa.slnx
dotnet test ZB.MOM.WW.OtOpcUa.slnx
# Run the server in dev (foreground)
dotnet run --project src/Server/ZB.MOM.WW.OtOpcUa.Server
The server starts on opc.tcp://localhost:4840 with the None security profile. Configure Security.Profiles in src/Server/ZB.MOM.WW.OtOpcUa.Server/appsettings.json to enable Basic256Sha256-Sign or Basic256Sha256-SignAndEncrypt. See docs/security.md.
Install as Windows Services
Production deployment is driven by scripts/install/Install-Services.ps1, which registers the OtOpcUa server service (and optionally the OtOpcUaWonderwareHistorian sidecar) under a chosen service account. Galaxy support requires a separately installed mxaccessgw — neither this repo nor the install script provisions it.
.\scripts\install\Install-Services.ps1 `
-InstallRoot 'C:\Program Files\OtOpcUa' `
-ServiceAccount 'DOMAIN\svc-otopcua'
Add -InstallWonderwareHistorian for the historian sidecar. See the script header and docs/ServiceHosting.md for full options.
Client CLI
dotnet run --project src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI -- connect -u opc.tcp://localhost:4840
dotnet run --project src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI -- browse -u opc.tcp://localhost:4840 -r -d 3
dotnet run --project src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI -- read -u opc.tcp://localhost:4840 -n "ns=2;s=SomeNode"
dotnet run --project src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI -- write -u opc.tcp://localhost:4840 -n "ns=2;s=SomeNode" -v 42
dotnet run --project src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI -- subscribe -u opc.tcp://localhost:4840 -n "ns=2;s=SomeNode" -i 500
See docs/Client.CLI.md and docs/Client.UI.md.
Documentation
Architecture deep-dives
| Topic | Doc |
|---|---|
| OPC UA server composition, namespace fan-out, Polly invoker | docs/OpcUaServer.md |
| Address space layout | docs/AddressSpace.md |
| Read / Write dispatch (driver vs virtual vs scripted-alarm) | docs/ReadWriteOperations.md |
| Incremental sync (driver-backend rediscovery + config publishes) | docs/IncrementalSync.md |
| Service hosting (Server + Admin + optional historian sidecar) | docs/ServiceHosting.md |
| Security (transport, LDAP, certificates) | docs/security.md |
| Redundancy | docs/Redundancy.md |
| Status dashboard | docs/StatusDashboard.md |
Drivers
| Topic | Doc |
|---|---|
| Driver specs (per-driver capability surface, config, addressing) | docs/v2/driver-specs.md |
| Galaxy driver | docs/drivers/Galaxy.md |
| Modbus / S7 / AbCip / AbLegacy / TwinCAT / FOCAS / OpcUaClient | docs/drivers/ |
| Galaxy parity rig (mxaccessgw setup) | docs/v2/Galaxy.ParityRig.md |
| Galaxy performance + tracing | docs/v2/Galaxy.Performance.md |
Clients
| Topic | Doc |
|---|---|
| Client CLI | docs/Client.CLI.md |
| Client UI (Avalonia desktop) | docs/Client.UI.md |
v1 archive
The original v1 in-process MXAccess docs (Galaxy.Host topology, Configuration env vars, AlarmTracking, DataTypeMapping, HistoricalDataAccess, Subscriptions, etc.) are preserved under docs/v1/ — historical reference only. PR 7.2 retired the v1 architecture on 2026-04-30; current state is documented in the sections above.
License
Internal use only.