What is the method for defining and utilizing the host name for Kafka within a Docker Compose setup?

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To define and utilize the host name for Kafka within a Docker Compose setup, follow these steps:

1. Open the docker-compose.yml file and define the environment variable for the Kafka broker host name:

environment:
      KAFKA_ADVERTISED_HOST_NAME: "kafka"

1. Define the Kafka service in the services section of the docker-compose.yml file:

kafka:
    image: wurstmeister/kafka:latest
    ports:
      - "9092:9092"
    environment:
      KAFKA_ADVERTISED_HOST_NAME: "kafka"

1. Define a network for the Kafka service:

networks:
  my_network:
    driver: bridge

1. Set the KAFKA_ADVERTISED_LISTENERS environment variable in the Kafka service:

environment:
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181

1. Reference the network in all other services that need to connect to the Kafka service:

networks:
      my_network:
        aliases:
          - myapp
      depends_on:
        - kafka

1. Use the host name kafka in the configuration of the Kafka clients to connect to the Kafka broker on the Docker network:

bootstrap.servers=kafka:9092

Note: Make sure to replace myapp with your application name, and zookeeper:2181 with the actual Zookeeper connection string.