docker-compose.yml

---
version: '3'
services:
  zookeeper:
    image: confluentinc/cp-zookeeper:5.5.0
    container_name: zookeeper
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000

  kafka:
    image: confluentinc/cp-enterprise-kafka:5.5.0
    container_name: kafka
    depends_on:
      - zookeeper
    ports:
      - 9092:9092
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,HOST:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,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:5.5.0
    ports:
      - 8081:8081
    container_name: schema-registry
    depends_on:
      - kafka
    environment:
      SCHEMA_REGISTRY_HOST_NAME: schema-registry
      SCHEMA_REGISTRY_KAFKASTORE_BOOTSTRAP_SERVERS: PLAINTEXT://kafka:29092
      SCHEMA_REGISTRY_CUB_KAFKA_TIMEOUT: 300

  ksqldb:
    image: confluentinc/ksqldb-server:0.9.0
    hostname: ksqldb
    container_name: ksqldb
    depends_on:
      - kafka
      - kafka-connect
    ports:
      - "8088:8088"
    environment:
      KSQL_LISTENERS: http://0.0.0.0:8088
      KSQL_BOOTSTRAP_SERVERS: kafka:29092
      KSQL_KSQL_CONNECT_URL: http://kafka-connect:8083
      KSQL_KSQL_SCHEMA_REGISTRY_URL: http://schema-registry:8081
      KSQL_KSQL_HIDDEN_TOPICS: '^_.*,default_ksql_processing_log'

  kafka-connect:
    image: confluentinc/cp-kafka-connect:5.4.1
    container_name: kafka-connect
    depends_on:
      - kafka
      - schema-registry
    ports:
      - 8083:8083
    environment:
      CONNECT_CUB_KAFKA_TIMEOUT: 300
      CONNECT_BOOTSTRAP_SERVERS: "kafka:29092"
      CONNECT_REST_ADVERTISED_HOST_NAME: 'kafka-connect'
      CONNECT_REST_PORT: 8083
      CONNECT_GROUP_ID: kafka-connect-group-01
      CONNECT_CONFIG_STORAGE_TOPIC: _kafka-connect-group-01-configs
      CONNECT_OFFSET_STORAGE_TOPIC: _kafka-connect-group-01-offsets
      CONNECT_STATUS_STORAGE_TOPIC: _kafka-connect-group-01-status
      CONNECT_KEY_CONVERTER: org.apache.kafka.connect.storage.StringConverter
      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/,/data/connect-jars'
      # External secrets config
      # See https://docs.confluent.io/current/connect/security.html#externalizing-secrets
      CONNECT_CONFIG_PROVIDERS: 'file'
      CONNECT_CONFIG_PROVIDERS_FILE_CLASS: 'org.apache.kafka.common.config.provider.FileConfigProvider'
    volumes:
      - ${PWD}/credentials.properties:/data/credentials.properties
    command: 
      # In the command section, $ are replaced with $$ to avoid the error 'Invalid interpolation format for "command" option'
      - bash 
      - -c 
      - |
        echo "Installing connector plugins"
        confluent-hub install --no-prompt jcustenborder/kafka-connect-twitter:0.3.33
        confluent-hub install --no-prompt neo4j/kafka-connect-neo4j:1.0.7
        #
        echo "Launching Kafka Connect worker"
        /etc/confluent/docker/run & 
        #
        sleep infinity

  postgres:
    # *-----------------------------*
    # To connect to the DB:
    #   docker exec -it postgres bash -c 'psql -U $POSTGRES_USER $POSTGRES_DB'
    # *-----------------------------*
    image: postgres:11
    container_name: postgres
    ports: 
      - 5432:5432
    environment:
     - POSTGRES_USER=postgres
     - POSTGRES_PASSWORD=postgres
    volumes:
     - ./data/postgres:/docker-entrypoint-initdb.d/

  neo4j:
    image: neo4j:4.0.4
    container_name: neo4j
    ports:
    - "7474:7474"
    - "7687:7687"
    environment:
      NEO4J_AUTH: neo4j/connect
      NEO4J_dbms_memory_heap_max__size: 8G
      NEO4J_ACCEPT_LICENSE_AGREEMENT: 'yes'