---
version: '3.5'
services:
  zookeeper:
    image: confluentinc/cp-zookeeper:5.3.0
    hostname: zookeeper
    container_name: zookeeper
    ports:
      - "2181:2181"
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000

  broker:
    image: confluentinc/cp-kafka:5.3.0
    hostname: broker
    container_name: broker
    depends_on:
      - zookeeper
    ports:
      - "29092:29092"
      - "9092:9092"
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: 'zookeeper:2181'
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://broker:29092,PLAINTEXT_HOST://localhost:9092
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0

  # This "container" is a workaround to pre-create topics
  kafka-setup:
    image: confluentinc/cp-kafka:5.3.0
    hostname: kafka-setup
    container_name: kafka-setup
    depends_on:
      - broker
      - schema-registry
    command: "bash -c 'echo Waiting for Kafka to be ready... && \
                       cub kafka-ready -b broker:29092 1 20 && \
                       kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic MetadataAuditEvent && \
                       kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic MetadataChangeEvent'"
    environment:
      # The following settings are listed here only to satisfy the image's requirements.
      # We override the image's `command` anyways, hence this container will not start a broker.
      KAFKA_BROKER_ID: ignored
      KAFKA_ZOOKEEPER_CONNECT: ignored

  schema-registry:
    image: confluentinc/cp-schema-registry:5.3.0
    hostname: schema-registry
    container_name: schema-registry
    depends_on:
      - zookeeper
      - broker
    ports:
      - "8081:8081"
    environment:
      SCHEMA_REGISTRY_HOST_NAME: schema-registry
      SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: 'zookeeper:2181'

  schema-registry-ui:
    image: landoop/schema-registry-ui:latest
    container_name: schema-registry-ui
    hostname: schema-registry-ui
    ports:
      - "8000:8000"
    environment:
      SCHEMAREGISTRY_URL: 'http://schema-registry:8081'
      ALLOW_GLOBAL: 'true'
      ALLOW_TRANSITIVE: 'true'
      ALLOW_DELETION: 'true'
      READONLY_MODE: 'true'
      PROXY: 'true'
    depends_on:
      - schema-registry

networks:
  default:
    name: datahub_network