docker-compose.local.yml

services:

  scheduler:
    image: etf1/kafka-message-scheduler:v0.0.6
    depends_on:
      init-kafka:
        condition: service_completed_successfully
    ports:
      - 8000:8000
    environment:
      BOOTSTRAP_SERVERS: kafka:29092
    healthcheck:
      test: wget --no-verbose --tries=1 --spider http://localhost:8000/schedules || exit 1
      interval: 60s
      retries: 5
      start_period: 20s
      timeout: 10s
      
  zookeeper:
    image: confluentinc/cp-zookeeper
    ports:
      - 2181:2181
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000
      # for health check "ruok"
      KAFKA_OPTS: "-Dzookeeper.4lw.commands.whitelist=*"
    healthcheck:
      test: ["CMD-SHELL", "echo 'ruok' | nc -w 2 localhost 2181 | grep imok"]
      interval: 20s
      timeout: 10s
      retries: 10

  kafka:
    image: confluentinc/cp-kafka
    depends_on:
      zookeeper:
        condition: service_healthy
    healthcheck:
      test: ["CMD-SHELL", "kafka-topics --bootstrap-server localhost:9092 --list"]
      interval: 30s
      timeout: 10s
      retries: 20
    ports:
      # Exposes 9092 for external connections to the broker
      # Use kafka:29092 for connections internal on the docker network
      # See https://rmoff.net/2018/08/02/kafka-listeners-explained/ for details
      - 9092:9092
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:9092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_AUTO_CREATE_TOPICS_ENABLE: 'false'

  init-kafka:
    image: confluentinc/cp-kafka
    depends_on:
      kafka:
        condition: service_healthy
    entrypoint: [ '/bin/sh', '-c' ]
    command: |
      "
      # blocks until kafka is reachable
      kafka-topics --bootstrap-server kafka:29092 --list

      echo -e 'Creating kafka topics'
      kafka-topics --bootstrap-server kafka:29092 --create --if-not-exists --topic schedules --config "cleanup.policy=compact" --config "retention.ms=-1"
      kafka-topics --bootstrap-server kafka:29092 --create --if-not-exists --topic history

      echo -e 'Successfully created the following topics:'
      kafka-topics --bootstrap-server kafka:29092 --list
      "