Test Infrastructure

This document describes the local Docker-based test infrastructure for ScadaLink development. Five services provide the external dependencies needed to run and test the system locally.

Services

Service	Image	Port(s)	Config
OPC UA Server	`mcr.microsoft.com/iotedge/opc-plc:latest`	50000 (OPC UA), 8080 (web)	`infra/opcua/nodes.json`
LDAP Server	`glauth/glauth:latest`	3893	`infra/glauth/config.toml`
MS SQL 2022	`mcr.microsoft.com/mssql/server:2022-latest`	1433	`infra/mssql/setup.sql`
SMTP (Mailpit)	`axllent/mailpit:latest`	1025 (SMTP), 8025 (web)	Environment vars
REST API (Flask)	Custom build (`infra/restapi/Dockerfile`)	5200	`infra/restapi/app.py`
LmxFakeProxy	Custom build (`infra/lmxfakeproxy/Dockerfile`)	50051 (gRPC)	Environment vars

Quick Start

cd infra
docker compose up -d

After the first startup, run the SQL setup and seed scripts:

docker exec -i scadalink-mssql /opt/mssql-tools18/bin/sqlcmd \
  -S localhost -U sa -P 'ScadaLink_Dev1#' -C \
  -i /docker-entrypoint-initdb.d/setup.sql

docker exec -i scadalink-mssql /opt/mssql-tools18/bin/sqlcmd \
  -S localhost -U sa -P 'ScadaLink_Dev1#' -C \
  -i /docker-entrypoint-initdb.d/machinedata_seed.sql

Per-Service Documentation

Each service has a dedicated document with configuration details, verification steps, and troubleshooting:

test_infra_opcua.md — OPC UA test server (Azure IoT OPC PLC)
test_infra_ldap.md — LDAP test server (GLAuth)
test_infra_db.md — MS SQL 2022 database
test_infra_smtp.md — SMTP test server (Mailpit)
test_infra_restapi.md — REST API test server (Flask)
test_infra_lmxfakeproxy.md — LmxProxy fake server (OPC UA bridge)

Connection Strings

For use in appsettings.Development.json:

{
  "ConnectionStrings": {
    "ScadaLinkConfig": "Server=localhost,1433;Database=ScadaLinkConfig;User Id=scadalink_app;Password=ScadaLink_Dev1#;TrustServerCertificate=true",
    "ScadaLinkMachineData": "Server=localhost,1433;Database=ScadaLinkMachineData;User Id=scadalink_app;Password=ScadaLink_Dev1#;TrustServerCertificate=true"
  },
  "Ldap": {
    "Server": "localhost",
    "Port": 3893,
    "BaseDN": "dc=scadalink,dc=local",
    "UseSsl": false
  },
  "OpcUa": {
    "EndpointUrl": "opc.tcp://localhost:50000"
  },
  "Smtp": {
    "Server": "localhost",
    "Port": 1025,
    "AuthMode": "None",
    "FromAddress": "scada-notifications@company.com",
    "ConnectionTimeout": 30
  },
  "ExternalSystems": {
    "TestApi": {
      "BaseUrl": "http://localhost:5200",
      "AuthMode": "ApiKey",
      "ApiKey": "scadalink-test-key-1"
    }
  }
}

Stopping & Teardown

cd infra
docker compose down            # stop containers, preserve SQL data volume
docker compose stop opcua      # stop a single service (also: ldap, mssql, smtp, restapi)

Full teardown (removes volumes, optionally images and venv):

cd infra
./teardown.sh              # stop containers + delete SQL data volume
./teardown.sh --images     # also remove downloaded Docker images
./teardown.sh --all        # also remove the Python venv

After a full teardown, the next docker compose up -d starts fresh — re-run the SQL setup script.

Files

infra/
  docker-compose.yml          # All five services
  teardown.sh                 # Teardown script (volumes, images, venv)
  glauth/config.toml          # LDAP users and groups
  mssql/setup.sql             # Database and user creation
  mssql/machinedata_seed.sql  # Machine Data tables, stored procedures, sample data
  opcua/nodes.json            # Custom OPC UA tag definitions
  restapi/app.py              # Flask REST API server
  restapi/Dockerfile          # REST API container build
  lmxfakeproxy/              # .NET gRPC proxy bridging LmxProxy protocol to OPC UA
  tools/                      # Python CLI tools (opcua, ldap, mssql, smtp, restapi)
  README.md                   # Quick-start for the infra folder

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