00 - docker-compose

docker-compose.yml

version: "3.9"

# =============================================================================
#  Parc – MQTT Bridge stack
# =============================================================================
#
#  Services:
#    mosquitto  – MQTT broker
#    bridge     – Python MQTT→MySQL bridge (this repo)
#
#  The MySQL/MariaDB server is expected to be external (already running).
#  All database credentials and the broker address are passed via environment
#  variables so no secret is baked into any image.
#
# =============================================================================

services:

  # ---------------------------------------------------------------------------
  # Mosquitto MQTT broker
  # ---------------------------------------------------------------------------
  mosquitto:
    image: eclipse-mosquitto:2
    container_name: mosquitto
    restart: unless-stopped
    volumes:
      - ./mosquitto/config/mosquitto.conf:/mosquitto/config/mosquitto.conf:ro
      - ./mosquitto/server-certs:/mosquitto/certs:ro
      - mosquitto-data:/mosquitto/data
      - mosquitto-log:/mosquitto/log
    ports:
      - "${MQTT_EXPOSE_PORT:-8883}:8883"   # expose only if needed externally
    networks:
      - parc-net
    healthcheck:
      test: ["CMD-SHELL", "mosquitto_sub -t '$$SYS/broker/uptime' -C 1 -W 2 || exit 1"]
      interval: 10s
      timeout: 5s
      retries: 5

  # ---------------------------------------------------------------------------
  # MQTT → MySQL bridge
  # ---------------------------------------------------------------------------
  bridge:
    build:
      context: .
      dockerfile: Dockerfile
    image: parc-mqtt-bridge:latest
    container_name: parc-bridge
    restart: unless-stopped
    volumes:
    - ./mosquitto/server-certs/ca.crt:/certs/ca.crt:ro
    - ./mosquitto/client-certs/client.crt:/certs/client.crt:ro
    - ./mosquitto/client-certs/client.key:/certs/client.key:ro
    depends_on:
      mosquitto:
        condition: service_healthy
    environment:
      # --- MQTT ---
      MQTT_HOST:         mosquitto          # service name inside Docker network
      MQTT_PORT:         "8883"
      MQTT_KEEPALIVE:    "60"
      MQTT_USER:         ${MQTT_USER:-}
      MQTT_PASSWORD:     ${MQTT_PASSWORD:-}
      MQTT_RETRY_DELAY:  "5"

      # --- Database ---
      DB_HOST:           ${DB_HOST}
      DB_PORT:           ${DB_PORT:-3306}
      DB_NAME:           ${DB_NAME:-parc}
      DB_USER:           ${DB_USER}
      DB_PASSWORD:       ${DB_PASSWORD}
      DB_RETRY_DELAY:    "5"

      # --- Logging ---
      LOG_LEVEL:         ${LOG_LEVEL:-INFO}
    networks:
      - parc-net
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
        max-file: "5"

# ---------------------------------------------------------------------------
# Shared network
# ---------------------------------------------------------------------------
networks:
  parc-net:
    name: parc-net

# ---------------------------------------------------------------------------
# Volumes
# ---------------------------------------------------------------------------
volumes:
  mosquitto-data:
  mosquitto-log: