docker-compose.yml

version: '3.2'
services:
  zookeeper:
    image: "confluentinc/cp-zookeeper:5.5.7"
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      #heartbeat schedule for synchronizing
      ZOOKEEPER_TICK_TIME: 2000

  kafka:
    image: "confluentinc/cp-enterprise-kafka:5.5.0"
    ports:
      - '9092:9092'
    depends_on:
      - zookeeper
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      #PLAINTEXT = communication without authentication and non encrypted
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      # Kafka is listening on 9092 on host machine and on 29092 in dockernetwork
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:9092
      KAFKA_AUTO_CREATE_TOPICS_ENABLE: "true"
      KAFKA_METRIC_REPORTERS: io.confluent.metrics.reporter.ConfluentMetricsReporter
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 100
      CONFLUENT_METRICS_REPORTER_BOOTSTRAP_SERVERS: kafka:29092
      CONFLUENT_METRICS_REPORTER_ZOOKEEPER_CONNECT: zookeeper:2181
      CONFLUENT_METRICS_REPORTER_TOPIC_REPLICAS: 1
      CONFLUENT_METRICS_ENABLE: 'true'
      CONFLUENT_SUPPORT_CUSTOMER_ID: 'anonymous'

  schema-registry:
    image: "confluentinc/cp-schema-registry:5.5.0"
    depends_on:
      - zookeeper
      - kafka
    ports:
      - '8081:8081'
    environment:
      SCHEMA_REGISTRY_HOST_NAME: schema-registry
      SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: zookeeper:2181

  kafka-connect:
    image: "${DOCKERHUB_USERNAME}/connectimage"
    ports:
      - "8083:8083"
    environment:
      CONNECT_BOOTSTRAP_SERVERS: "kafka:29092"
      CONNECT_REST_PORT: 8083
      CONNECT_GROUP_ID: predict-connector-group
      CONNECT_CONFIG_STORAGE_TOPIC: docker-connect-configs
      CONNECT_OFFSET_STORAGE_TOPIC: docker-connect-offsets
      CONNECT_STATUS_STORAGE_TOPIC: docker-connect-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_REST_ADVERTISED_HOST_NAME: "kafka-connect-cp"
      CONNECT_LOG4J_ROOT_LOGLEVEL: "INFO"
      CONNECT_LOG4J_LOGGERS: "org.apache.kafka.connect.runtime.rest=WARN,org.reflections=ERROR"
      CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR: "1"
      CONNECT_OFFSET_STORAGE_REPLICATION_FACTOR: "1"
      CONNECT_STATUS_STORAGE_REPLICATION_FACTOR: "1"
      CONNECT_PLUGIN_PATH: '/usr/share/java,/u01/connectors'
    depends_on:
      - zookeeper
      - kafka
      - schema-registry

  kafka-consumer:
    image: "${DOCKERHUB_USERNAME}/predictitconsumer"
    environment:
      KAFKAADRESS: "${KAFKAADRESS}"
      SPRING_DATASOURCE_URL: "${SPRING_DATASOURCE_URL}"
      SPRING_DATASOURCE_USERNAME: "${SPRING_DATASOURCE_USERNAME}"
      SPRING_DATASOURCE_PASSWORD: "${SPRING_DATASOURCE_PASSWORD}"
    env_file:
      - databasesecrets.env
    depends_on:
      - zookeeper
      - kafka
      - schema-registry

  kafka-consumer-twitter:
    image: twitterconsumer
    environment:
      KAFKAADRESS: "kafka:29092"
      GOOGLE_APPLICATION_CREDENTIALS: "/gcp/creds.json"
    env_file:
      - databasesecrets.env
    depends_on:
      - zookeeper
      - kafka
      - schema-registry
    volumes:
      - type: bind
        source: ./creds.json
        target: /gcp/creds.json

  kafka-setup:
    image: confluentinc/cp-kafka:5.1.1
    depends_on:
      - kafka
      - schema-registry
    command: "bash -c 'cub kafka-ready -b kafka:29092 1 40 && \
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic president.boris-stays && \
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic president.france-president && \
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic president.hungarian-prime-minister && \
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic president.brazil && \
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic president.corea && \
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic president.columbia && 
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic twittercount.macron &&
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic twittercount.pecresse &&
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic twittercount.johnson &&
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic twittercount.bolsonaro &&
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic twittercount.lula &&
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic twittercount.petro &&
                         kafka-topics --create --if-not-exists --zookeeper zookeeper:2181 --partitions 1 --replication-factor 1 --topic twittercount.lepen && '"
    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