docker-compose.yml

version: '3.1'
services:
  postgres:
    image: postgres:14.0-alpine
    ports:
      - 5433:5432
    environment:
      - POSTGRES_PASSWORD=handsome
    volumes:
      - postgres_data:/var/lib/postgresql/data
    networks:
      - hermes_dev
  redis:
    image: redis:6.2.6
    networks:
      - hermes_dev
  
  zookeeper:
    image: confluentinc/cp-zookeeper:6.2.1
    container_name: zookeeper
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
    networks:
      - hermes_dev

  broker:
    image: confluentinc/cp-kafka:6.2.1
    container_name: broker
    depends_on:
      - zookeeper
    ports:
    # "`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-
    # An important note about accessing Kafka from clients on other machines: 
    # -----------------------------------------------------------------------
    #
    # The config used here exposes port 9092 for _external_ connections to the broker
    # i.e. those from _outside_ the docker network. This could be from the host machine
    # running docker, or maybe further afield if you've got a more complicated setup. 
    # If the latter is true, you will need to change the value 'localhost' in 
    # KAFKA_ADVERTISED_LISTENERS to one that is resolvable to the docker host from those 
    # remote clients
    #
    # For connections _internal_ to the docker network, such as from other services
    # and components, use kafka:29092.
    #
    # 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_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://broker:29092,PLAINTEXT_HOST://localhost:9092
      KAFKA_AUTO_CREATE_TOPICS_ENABLE: "true"
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
      # -v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v
      # Useful settings for development/laptop use - modify as needed for Prod
      # This one makes ksqlDB feel a bit more responsive when queries start running
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 100
    networks:
      - hermes_dev

  elasticsearch:
  # https://stackoverflow.com/questions/48119189/elasticsearch-6-index-change-to-read-only-after-few-second
    image: docker.elastic.co/elasticsearch/elasticsearch:7.4.0
    container_name: elasticsearch
    ports:
      - 9200:9200
    volumes:
      - es-data:/usr/share/elasticsearch/data
    environment:
      ES_JAVA_OPTS: "-Xms1g -Xmx1g"
      discovery.type: "single-node"
      node.store.allow_mmap: "false"
      cluster.routing.allocation.disk.threshold_enabled: "false"
      index.blocks.read_only_allow_delete: null
    networks:
      - hermes_dev

volumes:
  postgres_data:
  es-data:
networks:
  hermes_dev: