docker-compose.yml

version: "3.5"

services:
  # Install postgres and setup the student database.
  postgres:
    container_name: postgres
    image: debezium/postgres
    ports:
      - 5432:5432
    environment:
      - POSTGRES_DB=studentdb
      - POSTGRES_USER=user
      - POSTGRES_PASSWORD=password

  # Install zookeeper. 
  zookeeper:
    container_name: zookeeper
    image: zookeeper
    ports:
      - 2181:2181

  # Install kafka and create needed topics. 
  kafka:
    container_name: kafka
    image: confluentinc/cp-kafka
    hostname: kafka
    ports:
      - 9092:9092
      - 29092:29092
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092,PLAINTEXT_HOST://kafka:29092
      LISTENERS: PLAINTEXT://0.0.0.0:9092
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
    depends_on:
      - zookeeper

  # Install debezium-connect. 
  debezium-connect:
    container_name: custom-debezium-connect
    image: custom-debezium-connect
    hostname: debezium-connect 
    ports:
      - '8083:8083'
    environment:
      GROUP_ID: 1
      CONFIG_STORAGE_TOPIC: debezium_connect_config
      OFFSET_STORAGE_TOPIC: debezium_connect_offsets
      STATUS_STORAGE_TOPIC: debezium_connect_status
      BOOTSTRAP_SERVERS: kafka:29092
    depends_on:
      - kafka
      - postgres

  # Build custom-debezium-connect. 
  create-topics:
    image: custom-debezium-connect
    command: bash -c "
      docker exec -t kafka /usr/bin/kafka-topics \
        --create --bootstrap-server :9092 \
        --topic student_email_changed \
        --partitions 1 \
        --replication-factor 1 
      && docker exec -t kafka /usr/bin/kafka-topics \
        --create --bootstrap-server :9092 \
        --topic student_enrolled \
        --partitions 1 \
        --replication-factor 1"
    depends_on:
      - kafka