Docker Compose example for Redundancy failover with Traefik

Docker Compose example for Redundancy failover with Nginx

The following example shows how Traefik can be configured in Docker Compose. No other configuration files are required. The necessary configurations are passed as command parameters or defined via labels.

The files used as a project can be found on the page HTTP(s) failover concepts for REST, OPC UA Server & WebManagement in the OPC Router.

services:
  traefik:
    image: traefik:v3.0
    restart: always
    networks:
      - opcrouter-net
    # Configurations as command parameters
    command:
      - “--api.dashboard=true”
      - “--api.insecure=true”
      - “--entrypoints.web.address=:80”
      - “--providers.docker=true”
      - “--providers.docker.exposedbydefault=false”
      - “--ping”
    ports:
      - “5080:80”
      - “5081:8080” # Traefik Dashboard (optional)
    volumes:
      - “/var/run/docker.sock:/var/run/docker.sock:ro”

  opcrouter-primary:
    image: inrayhub.azurecr.io/opcrouter-runtime:5.3.6001.68
    restart: always
    networks:
      - opcrouter-net
    ports:
      - “5085:8080”
    environment:
      - OR_I_ACCEPT_EULA=true
      - INITIAL_USERNAME=admin
      - INITIAL_PASSWORD=SuperSecret123
      - OR_REDUNDANCY_MODE=1
      - OR_REDUNDANCY_LOCAL_MANAGEMENT_ADDRESS=http://opcrouter-primary:8080
      - OR_REDUNDANCY_SHARED_KEY=LUyLxk4kZdvYW9kM6ZSBWbBatdj9RGow9Bp
      - OR_IMPORT_SOURCE=/inray/REST_Primary.rpe
volumes:
      # Make project available in container
      - ./REST_Primary.rpe:/inray/REST_Primary.rpe
    # Configurations via labels
    labels:
      - “traefik.enable=true”
      # Responds to the prefix /api
      - “traefik.http.routers.api-router.rule=PathPrefix(`/api`)”
      - “traefik.http.routers.api-router.entrypoints=web”
      - “traefik.http.routers.api-router.service=opcrouter-service”
      - “traefik.http.routers.api-router.middlewares=api-rewrite”
      # Replaces /api/ with /services/MyRestServer/api/
      - “traefik.http.middlewares.api-rewrite.replacepathregex.regex=^/api/(.*)”
      - “traefik.http.middlewares.api-rewrite.replacepathregex.replacement=/services/MyRestServer/api/$$1”
      # Load balancing configuration
      - “traefik.http.services.opcrouter-service.loadbalancer.server.port=8080”
      # Check availability by sending requests to the specified path
      - “traefik.http.services.opcrouter-service.loadbalancer.healthcheck.path=/health/runtime/ready”
      - “traefik.http.services.opcrouter-service.loadbalancer.healthcheck.interval=5s”
      - “traefik.http.services.opcrouter-service.loadbalancer.healthcheck.timeout=2s”

opcrouter-secondary:
    image: inrayhub.azurecr.io/opcrouter-runtime:5.3.6001.68
    restart: always
    networks:
      - opcrouter-net
    ports:
      - “5086:8080”
    environment:
      - OR_I_ACCEPT_EULA=true
      - INITIAL_USERNAME=admin
      - INITIAL_PASSWORD=SuperSecret123
      - OR_REDUNDANCY_MODE=2
      - OR_REDUNDANCY_SHARED_KEY=LUyLxk4kZdvYW9kM6ZSBWbBatdj9RGow9Bp
      - OR_REDUNDANCY_ADDRESS=http://opcrouter-primary:8080
- OR_REDUNDANCY_LOCAL_MANAGEMENT_ADDRESS=http://opcrouter-secondary:8080
- OR_REDUNDANCY_PRIMARY_TIMEOUT=30
      - OR_REDUNDANCY_SECONDARY_HEARTBEAT_INTERVAL=10
      - OR_IMPORT_SOURCE=/inray/REST_Secondary.rpe
    volumes:
      # Make project available in container
      - ./REST_Secondary.rpe:/inray/REST_Secondary.rpe
    # Configurations via labels
    labels:
      - “traefik.enable=true”
      # Responds to the prefix /api
      - “traefik.http.routers.api-router.rule=PathPrefix(`/api`)”
      - “traefik.http.routers.api-router.entrypoints=web”
      - “traefik.http.routers.api-router.service=opcrouter-service”
      - “traefik.http.routers.api-router.middlewares=api-rewrite”
      # Replaces /api/ with /services/MyRestServer/api/
      - “traefik.http.middlewares.api-rewrite.replacepathregex.regex=^/api/(.*)”
      - “traefik.http.middlewares.api-rewrite.replacepathregex.replacement=/services/MyRestServer/api/$$1”
      # Load balancing configuration
      - “traefik.http.services.opcrouter-service.loadbalancer.server.port=8080”
      # Check availability by sending requests to the specified path
      - “traefik.http.services.opcrouter-service.loadbalancer.healthcheck.path=/health/runtime/ready”
      - “traefik.http.services.opcrouter-service.loadbalancer.healthcheck.interval=5s”
      - “traefik.http.services.opcrouter-service.loadbalancer.healthcheck.timeout=2s”


networks:
  opcrouter-net: