services:
  broker1:
    image: apache/kafka:latest
    container_name: broker1
    environment:
      KAFKA_KRAFT_CLUSTER_ID: kafka-cluster-3-nodes # Define your cluster ID at .env file
      KAFKA_NODE_ID: 1
      KAFKA_PROCESS_ROLES: "broker,controller"
      KAFKA_LISTENERS: INTERNAL://:9092,CONTROLLER://:9093,EXTERNAL://:19092
      KAFKA_ADVERTISED_LISTENERS: INTERNAL://broker1:9092,EXTERNAL://localhost:19092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: INTERNAL:PLAINTEXT,CONTROLLER:PLAINTEXT,EXTERNAL:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: INTERNAL
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_LOG_DIRS: /var/lib/kafka/data
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 3
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 3
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 2
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@broker1:9093,2@broker2:9093,3@broker3:9093
    volumes:
      - /data/kafka/broker/01:/var/lib/kafka/data
    networks:
      - kafka-net
    ports:
      - "19092:19092" # Expose external port for broker1
    restart: unless-stopped

  broker2:
    image: apache/kafka:latest
    container_name: broker2
    environment:
      KAFKA_KRAFT_CLUSTER_ID: kafka-cluster-3-nodes # Define your cluster ID at .env file
      KAFKA_NODE_ID: 2
      KAFKA_PROCESS_ROLES: "broker,controller"
      KAFKA_LISTENERS: INTERNAL://:9092,CONTROLLER://:9093,EXTERNAL://:19092
      KAFKA_ADVERTISED_LISTENERS: INTERNAL://broker2:9092,EXTERNAL://localhost:19092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: INTERNAL:PLAINTEXT,CONTROLLER:PLAINTEXT,EXTERNAL:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: INTERNAL
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_LOG_DIRS: /var/lib/kafka/data
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 3
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 3
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 2
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@broker1:9093,2@broker2:9093,3@broker3:9093
    volumes:
      - /data/kafka/broker/02:/var/lib/kafka/data
    networks:
      - kafka-net
    ports:
      - "19093:19092" # Expose external port for broker2
    restart: unless-stopped

  broker3:
    image: apache/kafka:latest
    container_name: broker3
    environment:
      KAFKA_KRAFT_CLUSTER_ID: kafka-cluster-3-nodes # Define your cluster ID at .env file
      KAFKA_NODE_ID: 3
      KAFKA_PROCESS_ROLES: "broker,controller"
      KAFKA_LISTENERS: INTERNAL://:9092,CONTROLLER://:9093,EXTERNAL://:19092
      KAFKA_ADVERTISED_LISTENERS: INTERNAL://broker3:9092,EXTERNAL://localhost:19092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: INTERNAL:PLAINTEXT,CONTROLLER:PLAINTEXT,EXTERNAL:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: INTERNAL
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_LOG_DIRS: /var/lib/kafka/data
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 3
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 3
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 2
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@broker1:9093,2@broker2:9093,3@broker3:9093
    volumes:
      - /data/kafka/broker/03:/var/lib/kafka/data
    networks:
      - kafka-net
    ports:
      - "19094:19092" # Expose external port for broker3
    restart: unless-stopped

  kafdrop:
    image: obsidiandynamics/kafdrop:latest
    networks: 
      - kafka-net
    depends_on:
      - broker1
      - broker2
      - broker3
    ports:
      - 19000:9000
    environment:
      KAFKA_BROKERCONNECT: broker1:9092,broker2:9092,broker3:9092
    restart: unless-stopped

networks:
  kafka-net:
    driver: bridge