docker-compose.yml

---
version: '2'
services:
  zookeeper:
    container_name: zookeeper
    image: confluentinc/cp-zookeeper:6.2.0
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000

  broker:
    container_name: broker
    image: confluentinc/cp-kafka:6.2.0
    depends_on:
      - zookeeper
    ports:
    # Exposes 9092 for external connections to the broker
    # Use broker: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_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
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 100

  schema-registry:
    image: confluentinc/cp-schema-registry:6.2.0
    container_name: schema-registry
    ports:
      - 8081:8081
    depends_on:
      - broker
    environment:
      SCHEMA_REGISTRY_HOST_NAME: schema-registry
      SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: zookeeper:2181

  kafka-connect:
    image: confluentinc/cp-kafka-connect-base:6.2.0
    container_name: kafka-connect
    depends_on:
      - broker
      - schema-registry
    ports:
      - 8083:8083
    environment:
      CONNECT_BOOTSTRAP_SERVERS: "broker:29092"
      CONNECT_REST_PORT: 8083
      CONNECT_REST_ADVERTISED_HOST_NAME: "kafka-connect"
      CONNECT_GROUP_ID: kafka-connect
      CONNECT_CONFIG_STORAGE_TOPIC: _kafka-connect-01-configs
      CONNECT_OFFSET_STORAGE_TOPIC: _kafka-connect-01-offsets
      CONNECT_STATUS_STORAGE_TOPIC: _kafka-connect-01-status
      CONNECT_KEY_CONVERTER: io.confluent.connect.avro.AvroConverter
      CONNECT_KEY_CONVERTER_SCHEMA_REGISTRY_URL: 'http://schema-registry:8081'
      CONNECT_VALUE_CONVERTER: io.confluent.connect.avro.AvroConverter
      CONNECT_VALUE_CONVERTER_SCHEMA_REGISTRY_URL: 'http://schema-registry:8081'
      CONNECT_INTERNAL_KEY_CONVERTER: "org.apache.kafka.connect.json.JsonConverter"
      CONNECT_INTERNAL_VALUE_CONVERTER: "org.apache.kafka.connect.json.JsonConverter"
      CONNECT_LOG4J_ROOT_LOGLEVEL: "INFO"
      CONNECT_LOG4J_LOGGERS: "org.apache.kafka.connect.runtime.rest=WARN,org.reflections=ERROR"
      CONNECT_LOG4J_APPENDER_STDOUT_LAYOUT_CONVERSIONPATTERN: "[%d] %p %X{connector.context}%m (%c:%L)%n"
      CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR: "1"
      CONNECT_OFFSET_STORAGE_REPLICATION_FACTOR: "1"
      CONNECT_STATUS_STORAGE_REPLICATION_FACTOR: "1"
      # CONNECT_PLUGIN_PATH: '/usr/share/java,/usr/share/confluent-hub-components,/local-connect-jars'
      CONNECT_PLUGIN_PATH: '/usr/share/java,/usr/share/confluent-hub-components'
    # volumes:
    #   - ${PWD}/data/connect-jars:/local-connect-jars
    command: 
      - /bin/bash
      - -c 
      - |
        echo "Installing Connector"
        confluent-hub install --no-prompt confluentinc/kafka-connect-datagen:0.5.0
        confluent-hub install --no-prompt debezium/debezium-connector-mysql:1.6.0
        confluent-hub install --no-prompt confluentinc/kafka-connect-jdbc:10.2.3

        # # JDBC Drivers - download those required
        # # ------------
        # # MySQL
        cd /usr/share/confluent-hub-components/confluentinc-kafka-connect-jdbc
        # See https://dev.mysql.com/downloads/connector/j/
        curl https://cdn.mysql.com/Downloads/Connector-J/mysql-connector-java-8.0.23.tar.gz | tar xz 
        #
        # Now launch Kafka Connect
        /etc/confluent/docker/run &
        #
        echo "Waiting for Kafka Connect to start listening on $$CONNECT_REST_ADVERTISED_HOST_NAME ⏳"
        while [ $$(curl -s -o /dev/null -w %{http_code} http://$$CONNECT_REST_ADVERTISED_HOST_NAME:$$CONNECT_REST_PORT/connectors) -ne 200 ] ; do 
          echo -e $$(date) " Kafka Connect listener HTTP state: " $$(curl -s -o /dev/null -w %{http_code} http://$$CONNECT_REST_ADVERTISED_HOST_NAME:$$CONNECT_REST_PORT/connectors) " (waiting for 200)"
          sleep 5 
        done
        echo "Waiting for Schema Registry to start listening on schema-registry:8081 ⏳"
        while [ $$(curl -s -o /dev/null -w %{http_code} http://schema-registry:8081) -eq 000 ] ; do 
          echo -e $$(date) " Schema Registry listener HTTP state: " $$(curl -s -o /dev/null -w %{http_code} http://schema-registry:8081) " (waiting for != 000)"
          sleep 5 
        done
        #
        echo "Creating connector"
        curl -s -X PUT -H  "Content-Type:application/json" http://localhost:8083/connectors/source-datagen-item_details_01/config \
            -d '{
            "connector.class": "io.confluent.kafka.connect.datagen.DatagenConnector",
            "key.converter": "org.apache.kafka.connect.storage.StringConverter",
            "kafka.topic": "ratings",
            "max.interval":250,
            "quickstart": "ratings"
          }'

        # Don't let the container die
        sleep infinity

  ksqldb:
    # *-----------------------------*
    # To connect to ksqlDB CLI
    #   docker exec --interactive --tty ksqldb ksql http://localhost:8088
    # *-----------------------------*
    image: confluentinc/ksqldb-server:0.21.0
    container_name: ksqldb
    depends_on:
      - broker
    ports:
      - "8088:8088"
    user: root
    environment:
      KSQL_LISTENERS: http://0.0.0.0:8088
      KSQL_BOOTSTRAP_SERVERS: broker:29092
      KSQL_KSQL_SERVICE_ID: confluent_rmoff_01
      KSQL_KSQL_SCHEMA_REGISTRY_URL: http://schema-registry:8081
      KSQL_KSQL_HIDDEN_TOPICS: '^_.*'

# Other systems
  mysql:
    # *-----------------------------*
    # To connect to the DB: 
    #   docker-compose exec mysql bash -c 'mysql -u root -p$MYSQL_ROOT_PASSWORD'
    # *-----------------------------*
    #image: debezium/example-mysql:0.9
    image: mysql:8.0
    container_name: mysql
    ports:
      - 3306:3306
    environment:
     - MYSQL_ROOT_PASSWORD=Admin123
     - MYSQL_USER=connect_user
     - MYSQL_PASSWORD=asgard
    volumes:
     - ./data/mysql:/docker-entrypoint-initdb.d/

  kcat:
    # RIP kafkacat :'-(
    image: edenhill/kcat:1.7.0
    container_name: kcat
    entrypoint: 
      - /bin/sh 
      - -c 
      - |
        apk add jq; 
        while [ 1 -eq 1 ];do sleep 60;done