dockerapache-kafkadocker-composegitlab-cikafka-rest

Why I cannot access kafka-rest (started in docker-container) from another container (it's runs Karate-tests) only in Gitlab pipeline?


I run my pipeline in image: docker/compose:latest. I use this script to build and run containers in this image:

script:
    - docker-compose up -d
    - CONTAINER_ID=$(docker-compose ps -q karate)
    - EXIT_CODE=$(docker inspect -f '{{.State.ExitCode}}' $CONTAINER_ID)
    - |
      if [ $EXIT_CODE -eq 0 ]; then
        echo "Tests passed!"
      else
        echo "Tests failed with exit code: $EXIT_CODE"
        exit 1
      fi

And check exit code of my container with Karate tests. Test have access to API (send request to http://api:35000/), and to Kafka-Rest (send request to http://kafkarest:38082), but only locally, if I run docker-compose up -d on my PC.

If I run pipeline via script above, I can just connect and send request from my tests to API (via http://api/assets-api/upload-photo), but when i send request to Kafka-Rest to http://kafkarest:38082/consumers/testgroup, I got error: Connect to kafkarest:38082 [kafkarest/172.20.0.12] failed: Connection refused (Connection refused), http call failed after 43 milliseconds for url: http://kafkarest:38082/consumers/testgroup. Also I tried to access http://kafkarest/, http://docker:38082, http://localhost, but it didn't help me. Which url I should use to connect to Kafka Rest?

My docker-compose:

api:
    container_name: 'api'
    depends_on:
      - "db"
      - "kafka"
    build:
      dockerfile: Dockerfile
      context: .
    ports:
      - 35000:80
    environment:
      - ASPNETCORE_ENVIRONMENT=Docker
    networks:
      - capy-network

  karate:
    build:
      context: .
      dockerfile: Dockerfile-karate
    environment:
      - KARATE_ENV=mr
    depends_on:
      - db
      - s3
      - api
      - kafkarest 
    networks:
      - capy-network

  zookeeper:
    image: confluentinc/cp-zookeeper:4.1.1
    container_name: 'zookeeper'
    hostname: zookeeper
    ports: 
    - "32181:32181"
    environment:
      ZOOKEEPER_CLIENT_PORT: 32181
      ZOOKEEPER_TICK_TIME: 2000
      ZOOKEEPER_SYNC_LIMIT: 2
    networks:
      - capy-network

  kafka:
    image: confluentinc/cp-kafka:4.1.1
    container_name: 'kafka'
    hostname: kafka
    ports: 
    - "29092:29092"
    depends_on:
    - zookeeper
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:32181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
    networks:
      - capy-network

  kafka-ui:
    image: provectuslabs/kafka-ui
    container_name: 'kafka-ui'
    ports:
      - 8090:8080
    restart: always
    environment:
      - KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS=kafka:29092
      - KAFKA_CLUSTERS_0_ZOOKEEPER=zookeeper:32181
    links:
      - kafka
      - zookeeper 
    networks:
      - capy-network  

  schema-registry:
    image: confluentinc/cp-schema-registry:4.1.1
    container_name: 'schema-registry'
    hostname: schema-registry
    ports:
    - "38081:38081"
    depends_on:
    - kafka
    environment:
      SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: zookeeper:32181
      SCHEMA_REGISTRY_HOST_NAME: schema-registry
      SCHEMA_REGISTRY_LISTENERS: http://schema-registry:38081
      SCHEMA_REGISTRY_DEBUG: "true"
    networks:
      - capy-network

  kafkarest:
    image: confluentinc/cp-kafka-rest:4.1.1
    container_name: 'kafkarest'
    hostname: kafkarest
    ports:
    - "38082:38082"
    depends_on:
      - schema-registry
    environment:
      KAFKA_REST_ZOOKEEPER_CONNECT: zookeeper:32181
      KAFKA_REST_SCHEMA_REGISTRY_URL: schema-registry:38081
      KAFKA_REST_HOST_NAME: kafkarest
      KAFKA_REST_LISTENERS: http://kafkarest:38082
    networks:
      - capy-network

Solution

  • So, I detected a problem. We need to restart container with tests or add a delay for it, because Kafka Rest need some time to "wake up". After 3 restarts I've got test results. Tests were passed.