services:
  kafka:
    image: apache/kafka:latest
    container_name: kafka-broker
    hostname: kafka-broker
    restart: unless-stopped
    ports:
      - "9092:9092"
    environment:
      # Single-broker KRaft config (broker + controller in one process)
      KAFKA_BROKER_ID: 1
      KAFKA_PROCESS_ROLES: broker,controller
      KAFKA_NODE_ID: 1
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@kafka-broker:29093
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT,CONTROLLER:PLAINTEXT

      # Listeners:
      # - PLAINTEXT: for other containers in same network
      # - PLAINTEXT_HOST: for host / outside
      KAFKA_LISTENERS: PLAINTEXT://kafka-broker:29092,CONTROLLER://kafka-broker:29093,PLAINTEXT_HOST://0.0.0.0:9092

      # If you connect from OUTSIDE the LXC over LAN,
      # change 'localhost' below to the LXC IP (e.g. 192.168.1.50)
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka-broker:29092,PLAINTEXT_HOST://10.10.2.18:9092

      # Single-broker-safe replication settings
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0

      # Logs (inside container)
      KAFKA_LOG_DIRS: /tmp/kraft-combined-logs

      # Any fixed cluster id string is fine for local dev;
      # this is the same example used in Confluent's tutorial.
      CLUSTER_ID: MkU3OEVBNTcwNTJENDM2Qk

    networks:
      - kafka-network

  kafka-ui:
    image: provectuslabs/kafka-ui:latest
    container_name: kafka-ui
    restart: unless-stopped
    depends_on:
      - kafka
    ports:
      - "8080:8080"
    environment:
      KAFKA_CLUSTERS_0_NAME: "local"
      # Inside Docker network Kafka listens on 29092
      KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS: "kafka-broker:29092"
    networks:
      - kafka-network

  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:${STACK_VERSION}
    container_name: elasticsearch
    restart: unless-stopped
    environment:
      - discovery.type=single-node
      - cluster.name=${CLUSTER_NAME}
      - xpack.security.enabled=false
      - xpack.security.transport.ssl.enabled=false
      - ES_JAVA_OPTS=${ES_JAVA_OPTS}
      - xpack.license.self_generated.type=${LICENSE}
    volumes:
      - es-data:/usr/share/elasticsearch/data
    ports:
      - "${ES_PORT}:9200"
    networks:
      - elastic

  kibana:
    image: docker.elastic.co/kibana/kibana:${STACK_VERSION}
    container_name: kibana
    restart: unless-stopped
    depends_on:
      - elasticsearch
    environment:
      - SERVER_NAME=kibana
      - ELASTICSEARCH_HOSTS=http://elasticsearch:9200
    ports:
      - "${KIBANA_PORT}:5601"
    networks:
      - elastic

networks:
  elastic:
    driver: bridge

  kafka-network:
    driver: bridge

volumes:
  es-data:
    driver: local