docker-compose.yml

services:
  zookeeper:
    image: confluentinc/cp-zookeeper:7.2.0
    container_name: zookeeper
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000

  broker:
    image: confluentinc/cp-kafka:7.2.0
    container_name: broker
    ports:
      # To learn about configuring Kafka for access across networks see
      # https://www.confluent.io/blog/kafka-client-cannot-connect-to-broker-on-aws-on-docker-etc/
      - 9092:9092
      - 29092:29092
    depends_on:
      - zookeeper
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_INTERNAL:PLAINTEXT
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092,PLAINTEXT_INTERNAL://broker:29092
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1

  init-kafka:
    image: confluentinc/cp-kafka:7.2.0
    depends_on:
      - broker
    entrypoint: [ '/bin/sh', '-c' ]
    command: |
      "
      # blocks until kafka is reachable
      kafka-topics --bootstrap-server broker:29092 --list
      echo -e 'Creating kafka topics'
      kafka-topics --bootstrap-server broker:29092 --create --if-not-exists --topic events --replication-factor 1 --partitions 2
      echo -e 'Successfully created the following topics:'
      kafka-topics --bootstrap-server broker:29092 --list
      "