compose.yml

volumes:
  db_data:
    driver: local
  kafka_data:
    driver: local


networks:
  kafka-net:
    driver: bridge
  microservice-network: # Define a custom network for microservices. Not production realistic.
    driver: bridge

services:
  # PostgreSQL Database Service
  # For Development Purpose, we provide a shared database across services. In production mode, each microservice has its own persistence service.
  postgres-db:
    image: postgres:latest
    container_name: shared-postgresql-db
    ports:
      - "5432:5432" # Exposes the PostgreSQL port to the host
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: mypassword #TODO: implement secret management
      POSTGRES_DB: medhead_hospital_service
    volumes:
      - db_data:/var/lib/postgresql/data # Persists database data locally to avoid data loss
    networks:
      - microservice-network # Uses the shared custom network

## TODO: add or remove this part
#  # Hospital Service (Spring Cloud microservice)
#  hospital-service:
#    build:
#      context: hospital-service/.
#      dockerfile: Dockerfile
#    depends_on:
#      - postgres-db
#    ports:
#      - "8081:8081" # Exposes the application port
#    environment:
#      SPRING_DATASOURCE_URL: jdbc:postgresql://db:5432/medhead_hospital_service
#      SPRING_DATASOURCE_USERNAME: postgres
#      SPRING_DATASOURCE_PASSWORD: mypassword
#    networks:
#      - microservice-network # Uses the same custom network as `db`

  # Kafka broker and controller configuration for the Kafka cluster
  # KRaft consensus (no Zookeeper) : https://developer.confluent.io/learn/kraft/
  kafka:
    image: bitnami/kafka
    hostname: kafka
    container_name: kafka
    restart: on-failure
    ports:
      - "9092:9092"
      - "9093:9093"
    environment:
      - KAFKA_CFG_NODE_ID=0
      - KAFKA_CFG_PROCESS_ROLES=controller,broker
      - KAFKA_CFG_LISTENERS=PLAINTEXT://:9092,CONTROLLER://:9093
      - KAFKA_CFG_LISTENER_SECURITY_PROTOCOL_MAP=CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT
      - KAFKA_CFG_CONTROLLER_QUORUM_VOTERS=0@kafka:9093
      - KAFKA_CFG_CONTROLLER_LISTENER_NAMES=CONTROLLER
    volumes:
      - kafka_data:/var/lib/kafka/data
    networks:
      - kafka-net

  # Kafka UI service configuration for monitoring and managing the Kafka cluster
  kafka-ui:
    image: provectuslabs/kafka-ui:latest
    container_name: kafka-cluster-ui
    ports:
      - "8080:8080"
    environment:
      DYNAMIC_CONFIG_ENABLED: true
      KAFKA_CLUSTER_O_NAME: local
      KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS: "kafka:9092"
    depends_on:
      - kafka
    networks:
      - kafka-net