witness/docker-compose.yaml at main · flammafex/witness · GitHub

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services:
  # ============================================================================
  # SETUP SERVICE (Ephemeral)
  # ============================================================================
  # This service runs once to generate keys and configuration files for the
  # cluster. It saves them to the shared 'witness-config' volume.
  setup:
    build:
      context: .
      target: witness-node
    volumes:
      - witness-config:/data
    entrypoint: ["/bin/bash", "-c"]
    # Script to generate keys for 3 witnesses and create network.json
    command:
      - |
        if [ -f /data/network.json ]; then
          echo "✅ Configuration already exists. Skipping setup."
          exit 0
        fi

        echo "🔧 Generating Witness Keys..."

        # Helper to generate node config and return pubkey,auth token
        gen_config() {
          ID=$1
          # Generate keypair using the binary
          OUT=$$(witness-node --generate-key)
          PRIV=$$(echo "$$OUT" | grep "Private key:" | awk '{print $$3}')
          PUB=$$(echo "$$OUT" | grep "Public key:" | awk '{print $$3}')
          TOKEN=$$(od -An -N32 -tx1 /dev/urandom | tr -d ' \n')

          # Write Node Config
          echo "{\"id\": \"witness-$$ID\", \"private_key\": \"$$PRIV\", \"port\": 3000, \"host\": \"0.0.0.0\", \"network_id\": \"docker-net\", \"max_clock_skew\": 300, \"signing_auth_token\": \"$$TOKEN\"}" > /data/witness$$ID.json
          echo "$$PUB,$$TOKEN"
        }

        W1=$$(gen_config 1)
        W2=$$(gen_config 2)
        W3=$$(gen_config 3)

        IFS=',' read -r PUB1 TOKEN1 <<< "$$W1"
        IFS=',' read -r PUB2 TOKEN2 <<< "$$W2"
        IFS=',' read -r PUB3 TOKEN3 <<< "$$W3"

        echo "📝 Creating network.json..."
        cat > /data/network.json <<EOF
        {
          "id": "docker-net",
          "threshold": 2,
          "witnesses": [
            { "id": "witness-1", "pubkey": "$$PUB1", "endpoint": "http://witness-1:3000", "auth_token": "$$TOKEN1" },
            { "id": "witness-2", "pubkey": "$$PUB2", "endpoint": "http://witness-2:3000", "auth_token": "$$TOKEN2" },
            { "id": "witness-3", "pubkey": "$$PUB3", "endpoint": "http://witness-3:3000", "auth_token": "$$TOKEN3" }
          ],
          "federation_peers": [],
          "external_anchors": { "enabled": false, "providers": [] }
        }
        EOF

        echo "✅ Setup complete."

  # ============================================================================
  # WITNESS NODES
  # ============================================================================
  witness-1:
    build:
      context: .
      target: witness-node
    depends_on:
      setup:
        condition: service_completed_successfully
    volumes:
      - witness-config:/data
    command: ["witness-node", "--config", "/data/witness1.json", "--host", "0.0.0.0"]
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:3000/health"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 5s
    networks:
      - witness-net

  witness-2:
    build:
      context: .
      target: witness-node
    depends_on:
      setup:
        condition: service_completed_successfully
    volumes:
      - witness-config:/data
    command: ["witness-node", "--config", "/data/witness2.json", "--host", "0.0.0.0"]
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:3000/health"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 5s
    networks:
      - witness-net

  witness-3:
    build:
      context: .
      target: witness-node
    depends_on:
      setup:
        condition: service_completed_successfully
    volumes:
      - witness-config:/data
    command: ["witness-node", "--config", "/data/witness3.json", "--host", "0.0.0.0"]
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:3000/health"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 5s
    networks:
      - witness-net

  # ============================================================================
  # GATEWAY
  # ============================================================================
  gateway:
    build:
      context: .
      target: witness-gateway
    depends_on:
      setup:
        condition: service_completed_successfully
      witness-1:
        condition: service_healthy
      witness-2:
        condition: service_healthy
      witness-3:
        condition: service_healthy
    ports:
      - "8080:8080"
    volumes:
      - witness-config:/config
      - gateway-data:/data
    environment:
      - RUST_LOG=info,witness_gateway=debug
    # Point config to the shared volume, and db to the persistence volume
    command: ["witness-gateway", "--config", "/config/network.json", "--host", "0.0.0.0", "--port", "8080", "--database", "/data/gateway.db"]
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 10s
    networks:
      - witness-net

volumes:
  witness-config: # Shared keys and network.json
  gateway-data:   # SQLite database persistence

networks:
  witness-net: