docker-compose-local.yml

---
# Based on https://developer.confluent.io/quickstart/kafka-docker/
version: '3'
services:
  zookeeper:
    image: confluentinc/cp-zookeeper:7.3.2
    container_name: zookeeper
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000
    healthcheck:
      # Based on https://stackoverflow.com/a/50055449
      test: ["CMD", "printf", "", "2>>/dev/null", ">>/dev/tcp/localhost/2181"]
      interval: 1s
      timeout: 1s
      retries: 1

  kafka:
    image: confluentinc/cp-kafka:7.3.2
    container_name: kafka
    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:
        condition: service_healthy
    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://kafka:29092
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
    healthcheck:
      # Based on https://stackoverflow.com/a/50055449
      test: ["CMD", "printf", "", "2>>/dev/null", ">>/dev/tcp/localhost/9092"]
      interval: 1s
      timeout: 1s
      retries: 1

  postgres:
    image: postgres:14.5
    container_name: postgres
    ports:
      - "5432:5432"
    environment:
      POSTGRES_HOST_AUTH_METHOD: trust
      POSTGRES_DB: webmonitor
    healthcheck:
      # Based on https://stackoverflow.com/a/50055449
      test: ["CMD", "printf", "", "2>>/dev/null", ">>/dev/tcp/localhost/5432"]
      interval: 1s
      timeout: 1s
      retries: 1

  webmonitor:
    image: webmonitor
    container_name: webmonitor
    command: ./src/start_webmonitor.py
    depends_on:
      kafka:
        condition: service_healthy
    environment:
      KAFKA_HOST: kafka
      KAFKA_PORT: 29092

  dbwriter:
    image: webmonitor
    container_name: dbwriter
    command: ./src/start_dbwriter.py
    depends_on:
      kafka:
        condition: service_healthy
      postgres:
        condition: service_healthy
    environment:
      KAFKA_HOST: kafka
      KAFKA_PORT: 29092
      DB_NAME: postgres
      DB_HOST: postgres
      DB_PORT: 5432
      DB_USER: postgres