kafka docker-compose setup

docker-compose.yaml

version: "3.9"
services:
  example-app:
    image: example-app
    environment:
      KAFKA_BOOTSTRAP_SERVERS: "kafka:19092". # this setting is important: LISTENER_DOCKER_INTERNAL://kafka:19092
      KAFKA_TOPIC: "topic-name"
      KAFKA_SCHEMA_REGISTRY_URL: "http://kafka-schema-registry:8081"
    ports:
      - "8002:8002"
    links:
      - kafka
      - kafka-schema-registry
    depends_on:
      - kafka
      - kafka-schema-registry
  zookeeper:
    image: confluentinc/cp-zookeeper:6.2.1
    restart: always
    hostname: zookeeper
    container_name: zookeeper
    ports:
      - "2181:2181"
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_SERVER_ID: 1
      ZOOKEEPER_SERVERS: zookeeper:2888:3888
    volumes:
      - zookeeper-data:/data
      - zookeeper-log:/datalog
  kafka:
    image: confluentinc/cp-kafka:6.2.1
    restart: always
    hostname: kafka
    container_name: kafka
    user: "appuser:appuser"
    ports:
      - "9092:9092"
      - "9999:9999"
      - "19092:19092"
    environment:
      KAFKA_ADVERTISED_LISTENERS: LISTENER_DOCKER_INTERNAL://kafka:19092,LISTENER_DOCKER_EXTERNAL://${DOCKER_HOST_IP:-127.0.0.1}:9092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: LISTENER_DOCKER_INTERNAL:PLAINTEXT,LISTENER_DOCKER_EXTERNAL:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: LISTENER_DOCKER_INTERNAL
      KAFKA_ZOOKEEPER_CONNECT: "zookeeper:2181"
      KAFKA_BROKER_ID: 1
      KAFKA_LOG4J_LOGGERS: "kafka.controller=INFO,kafka.producer.async.DefaultEventHandler=INFO,state.change.logger=INFO"
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
      KAFKA_JMX_PORT: 9999
      KAFKA_JMX_HOSTNAME: ${DOCKER_HOST_IP:-127.0.0.1}
    volumes:
      - kafka-data:/var/lib/kafka/data
    depends_on:
      - zookeeper
  kafka-schema-registry:
    image: confluentinc/cp-schema-registry:6.2.1
    container_name: kafka-schema-registry
    hostname: kafka-schema-registry
    depends_on:
      - zookeeper
      - kafka
    ports:
      - "8081:8081"
    environment:
      SCHEMA_REGISTRY_HOST_NAME: kafka-schema-registry
      SCHEMA_REGISTRY_KAFKASTORE_BOOTSTRAP_SERVERS: 'PLAINTEXT://rounds-kafka:19092'
      SCHEMA_REGISTRY_LISTENERS: http://0.0.0.0:8081
volumes:
  zookeeper-data:
  zookeeper-log:
  kafka-data: