Kafka：解決錯誤：打開與服務器 localhost/127.0.0.1:2181 的套接字連接。 不會嘗試使用 SASL 進行身份驗證（未知錯誤）？

Question

在啟動 kafka 模式注冊表或 kafka 服務器時，我遇到以下錯誤並且服務器啟動失敗。 有人可以幫我解決以下錯誤。

SendThread(localhost:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)

[main-SendThread(localhost:2181)] INFO org.apache.zookeeper.ClientCnxn - Socket error occurred: localhost/127.0.0.1:2181: Connection refused

[main-SendThread(localhost:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)

[main-SendThread(localhost:2181)] INFO org.apache.zookeeper.ClientCnxn - Socket error occurred: localhost/127.0.0.1:2181: Connection refused

[main-SendThread(localhost:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)

我的 Docker Compose 文件如下 -

version: "3.7"
services:
  postgres:
    image: debezium/postgres:13
    ports:
      - 5432:5432
    environment:
      - POSTGRES_USER=docker
      - POSTGRES_PASSWORD=docker
      - POSTGRES_DB=exampledb

  zookeeper:
    image: confluentinc/cp-zookeeper:5.5.3
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
    ports:
      - 2181:2181

  kafka:
    image: confluentinc/cp-enterprise-kafka:5.5.3
    depends_on: [zookeeper]
    environment:
      KAFKA_ZOOKEEPER_CONNECT: "localhost:2181"
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092
      KAFKA_BROKER_ID: 1
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_JMX_PORT: 9991
    ports:
      - 9092:9092

  debezium:
    image: debezium/connect:1.4
    environment:
      BOOTSTRAP_SERVERS: kafka:9092
      GROUP_ID: 1
      CONFIG_STORAGE_TOPIC: connect_configs
      OFFSET_STORAGE_TOPIC: connect_offsets
      KEY_CONVERTER: io.confluent.connect.avro.AvroConverter
      VALUE_CONVERTER: io.confluent.connect.avro.AvroConverter
      CONNECT_KEY_CONVERTER_SCHEMA_REGISTRY_URL: http://schema-registry:8081
      CONNECT_VALUE_CONVERTER_SCHEMA_REGISTRY_URL: http://schema-registry:8081
    depends_on: [kafka]
    ports:
      - 8083:8083

  schema-registry:
    image: confluentinc/cp-schema-registry:5.5.3
    environment:
      - SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL=localhost:2181
      - SCHEMA_REGISTRY_HOST_NAME=schema-registry
      - SCHEMA_REGISTRY_LISTENERS=http://schema-registry:8081,http://localhost:8081
    ports:
      - 8081:8081
    depends_on: [zookeeper, kafka]

Answer 1

KAFKA_ZOOKEEPER_CONNECT需要指向 Zookeeper 服務，而不是 Kafka 容器的localhost 。

我建議您從 Confluent 的 Docker 入門指南開始，其中包含有效的 Compose 文件或 Debezium 文檔。