docker-compose.yml

# See: https://github.com/compose-spec/compose-spec/blob/main/spec.md

# Ports (from external hosts (including WAN)):
# host -> container:port
# 8080 -> oauth_relay_service:8080 : endpoints such as /login and /redirect_uri 
# 9092 -> kafka:9092 
# NOTE: See comment in '.env' file, IF you're running `docker-compose build` from MSys
#       P/S: DO _NOT_ enable Kubernetes on Windows version, it will make your life miserable!
# NOTE: Docker Compose Internal DNS service will let you refer to other hosts by service name
#       e.g. 'kafka_auth_messenger', 'oauth_relay_service', etc. without needing to use 
#       the "hostname: my_host_name" magically AS LONG AS they're in the same network
#       (in this case, 'ms_network_bridge') AND the container is running.  When it isn't
#       running, the name lookup (i.e. 'nslookup kafka_auth_messenger') will fail instantly.
services:
  oauth_relay_service:
    build: oauth_relay_service
    networks:
      - ms_network_bridge
    depends_on:
      kafka_auth_messenger:
        condition: service_started
    environment:
      - GOOGLE_CLIENT_ID=${GOOGLE_CLIENT_ID}
      - GOOGLE_CLIENT_SECRET=${GOOGLE_CLIENT_SECRET}
      - GOOGLE_REDIRECT_URI=${GOOGLE_REDIRECT_URI}
      - REST_PORT=${REST_PORT}
      - DB_CONNECTION=${DB_CONNECTION}
      - DB_HOST=${DB_HOST}
      - DB_PORT=${DB_PORT}
      - DB_STORAGE_PATH=${DB_STORAGE_PATH}
      - MQ_CONNECTION=${MQ_CONNECTION}
      - BROKER_HOST=${BROKER_HOST}
      - BROKER_PORT=${BROKER_PORT}
    ports:
      #- "8080:8080" # HTTP/REST
      #- "${REST_PORT}:${REST_PORT}" # HTTP/REST
      - published: ${REST_PORT}
        target: ${REST_PORT}
        protocol: tcp
    volumes:
      - "sqlite_data:/${DB_STORAGE_PATH}:rw"
    entrypoint: 
      ["./verify-kafka.sh", "kafka_auth_messenger", "${BROKER_PORT}", "./oauth_relay_service"]

  # see: https://github.com/bitnami/containers/blob/main/bitnami/kafka/docker-compose.yml
  kafka_auth_messenger:
    image: 
      #docker.io/bitnami/kafka:3.7
      'bitnami/kafka:latest'
    networks:
      - ms_network_bridge
    environment:
      - MQ_CONNECTION=${MQ_CONNECTION}
      - BROKER_HOST=${BROKER_HOST}
      - BROKER_PORT=${BROKER_PORT}
      # KRaft settings
      - KAFKA_CFG_NODE_ID=0
      - KAFKA_CFG_PROCESS_ROLES=controller,broker
      - KAFKA_CFG_CONTROLLER_QUORUM_VOTERS=0@localhost:9093
      # Listeners
      - KAFKA_CFG_LISTENERS=PLAINTEXT://:${BROKER_PORT},CONTROLLER://:9093
      - KAFKA_CFG_ADVERTISED_LISTENERS=PLAINTEXT://:${BROKER_PORT}
      - KAFKA_CFG_LISTENER_SECURITY_PROTOCOL_MAP=CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT
      - KAFKA_CFG_CONTROLLER_LISTENER_NAMES=CONTROLLER
      - KAFKA_CFG_INTER_BROKER_LISTENER_NAME=PLAINTEXT
    ports:
      # Make sure this matches BROKER_PORT in .env!
      - published: ${BROKER_PORT}
        target: ${BROKER_PORT}
        protocol: tcp
      #- "9092:9092"
    volumes:
      # see: https://hub.docker.com/r/bitnami/kafka
      - "kafka_auth_data:/bitnami:rw"
    healthcheck:
      test: ["CMD", "/opt/bitnami/kafka/bin/kafka-broker-api-versions.sh", "--bootstrap-server", "localhost:${BROKER_PORT}"]
      interval: 30s
      timeout: 10s
      retries: 5

volumes:
  kafka_auth_data:
    driver: local
  sqlite_data:
    driver: local

# Don't define networks unless you have specific needs to isolate it from the default bridge
networks:
  ms_network_bridge:
    driver: bridge