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