kafka-mqtt:
  image: confluentinc/cp-kafka-mqtt
  ports:
    - "1883:1883"
  environment:
    - KAFKA_MQTT_BOOTSTRAP_SERVERS=kafka1:9092,kafka2:9092,kafka3:9092
    - KAFKA_MQTT_TOPIC_REGEX_LIST=temperature:.*
  extra_hosts:
    - kafka1:10.0.0.21
    - kafka2:10.0.0.22
    - kafka3:10.0.0.23
  restart: unless-stopped