services:
    zookeeper:
        image: confluentinc/cp-zookeeper:7.4.0
        environment:
            ZOOKEEPER_CLIENT_PORT: 2181
            ZOOKEEPER_TICK_TIME: 2000
        ports:
        - 2181:2181

    kafka:
        image: confluentinc/cp-kafka:7.4.0
        ports:
        - 9092:9092
        - 9997:9997
        expose:
        - 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://kafka:29092,PLAINTEXT_HOST://localhost:9092
            KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
            KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
            KAFKA_LOG_FLUSH_INTERVAL_MESSAGES: 10000
            KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
        depends_on:
        - zookeeper

    init-kafka:
        image: confluentinc/cp-kafka:7.4.0
        depends_on:
          - kafka
        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 commands --replication-factor 1 --partitions 1
          kafka-topics --bootstrap-server kafka:29092 --create --if-not-exists --topic data --replication-factor 1 --partitions 1
          kafka-topics --bootstrap-server kafka:29092 --create --if-not-exists --topic response --replication-factor 1 --partitions 1

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

    kafka-ui:
      container_name: kafka-ui
      image: provectuslabs/kafka-ui:latest
      ports:
        - 8080:8080
      depends_on:
        - kafka
      environment:
        KAFKA_CLUSTERS_0_NAME: local
        KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS: kafka:29092
        KAFKA_CLUSTERS_0_METRICS_PORT: 9997