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Андрей Алексеев
Asked:2022-06-29 21:33:20 +0000 UTC2022-06-29 21:33:20 +0000 UTC

无法从 docker 容器连接到 kafka

  • 772

我在 docker 容器中运行服务以及 kafka 和 zookeeper。

我启动了 akhq 服务，它就像一个用于查看 kafka 主题和消息的面板。

akhq 服务显示创建的主题和 kafka 消息。此服务在 kafka:9092 连接

但是另一项服务 adapter 无法连接到 kafka。出现错误：拨打 tcp :9092: 连接：连接被拒绝

虽然适配器服务也尝试连接到 kafka:9092 ，（尝试了 127.0.0.1:9092 和 localhost:9092）从适配器服务的控制台，地址 kafka:9092 被成功 ping。

我该如何解决？

我正在附加 docker-compose.yaml

version: '3'

volumes:
  zookeeper-data:
    driver: local
  zookeeper-log:
    driver: local
  kafka-data:
    driver: local

services:
    akhq:
        image: tchiotludo/akhq
        environment: 
          AKHQ_CONFIGURATION: |
            akhq:
              security:
                default-group: reader
              connections:
                docker-kafka-server:
                  properties:
                    bootstrap.servers: "kafka:9092"
                  schema-registry:
                    url: "http://schema-registry:8085"

        ports:
          - 8888:8080
        links:
          - kafka
          - schema-registry

    zookeeper:
        image: confluentinc/cp-zookeeper
        volumes:
          - zookeeper-data:/var/lib/zookeeper/data:Z
          - zookeeper-log:/var/lib/zookeeper/log:Z
        environment:
          ZOOKEEPER_CLIENT_PORT: '2181'
          ZOOKEEPER_ADMIN_ENABLE_SERVER: 'false'

    kafka:
        image: confluentinc/cp-kafka
        volumes:
          - kafka-data:/var/lib/kafka/data:Z
        environment:
          KAFKA_BROKER_ID: '0'
          KAFKA_ZOOKEEPER_CONNECT: 'zookeeper:2181'
          KAFKA_NUM_PARTITIONS: '12'
          KAFKA_COMPRESSION_TYPE: 'gzip'
          KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: '1'
          KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: '1'
          KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: '1'
          KAFKA_ADVERTISED_LISTENERS: 'PLAINTEXT://kafka:9092'
          KAFKA_CONFLUENT_SUPPORT_METRICS_ENABLE: 'false'
          KAFKA_JMX_PORT: '9091'
          KAFKA_AUTO_CREATE_TOPICS_ENABLE: 'true'
          KAFKA_AUTHORIZER_CLASS_NAME: 'kafka.security.authorizer.AclAuthorizer'
          KAFKA_ALLOW_EVERYONE_IF_NO_ACL_FOUND: 'true'
        links:
          - zookeeper

    schema-registry:
        image: confluentinc/cp-schema-registry
        depends_on:
          - kafka
        environment:
          SCHEMA_REGISTRY_KAFKASTORE_BOOTSTRAP_SERVERS: 'PLAINTEXT://kafka:9092'
          SCHEMA_REGISTRY_HOST_NAME: 'schema-registry'
          SCHEMA_REGISTRY_LISTENERS: 'http://0.0.0.0:8085'
          SCHEMA_REGISTRY_LOG4J_ROOT_LOGLEVEL: 'INFO'


    adapter: #kafka adapter
        build:
            context: .
            dockerfile: ./adapter.dockerfile
        environment:
            - GO_ENV=dev
            - GOPATH=/go
        container_name: kafka-adapter-app
        depends_on:
          - kafka

docker

2 个回答

  1. Best Answer

    这是错误

    services:
    akhq:
        image: tchiotludo/akhq
        ....
        links:
          - kafka
          - schema-registry

    links不会在服务之间创建依赖关系。必须使用depends_on，然后它会docker compose等待Kafka，然后它会启动akhq

    • 2

  2. 底线是该服务在启动时立即尝试连接到 Kafka。卡夫卡此时还没有准备好。

    为服务设置从启动服务到尝试连接的超时时间。

    • 0

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