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• ConfluentKafkaLibrary is a Robot Framework library to verify Kafka Event Streaming.
• Robotframework-ConfluentKafkaLibrary

Issues

1-In the current implementation of ConfluentKafkaLibrary, the consumer module connects to Kafka cluster from the port "9092".

...

   kafka:
    image: confluentinc/cp-kafka:6.2.1
    container_name: kafka
    ports:
      - "19092:19092"
    depends_on:
      - zookeeper
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,CONNECTIONS_FROM_HOST://localhost:19092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,CONNECTIONS_FROM_HOST:PLAINTEXT
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1

In order to solve this conflict, the current port has been changed to 9092 in docker-compose.yml

2-The ConfluentKafkaLibrary also try to access the KAFKA_ADVERTISED_LISTENERS (PLAINTEXT://kafka:9092) natively.

However, it gets fail because of hostname to IP address resolution issue. There are two possible solution for this problem.

a- Add an entry into /etc/hosts like 127.0.0.1 kafka

b- Change the KAFKA_ADVERTISED_LISTENERS into PLAINTEXT://localhost:9092,CONNECTIONS_FROM_HOST://localhost:19092

The second solution is being applied in the latest patch set.