Confluent Schema Registry 无法连接到 Kafka 容器

Question

我正在尝试使用 Zookeper、Kafdrop 和 Schema Registry 运行 Kafka 服务，我通过在一个容器中安装 Kafka、Zookeper 和 Kadrop 然后在另一个容器中安装 Confluent Schema Registry（带有自己的 Kafka、Zookeeper、 Ksql Server 和 Rest Proxy），但是试图让 kafdrop 读取模式注册表不起作用，所以现在我想只安装一个带有 Kafka、Zookeeper、Kafdrop 和模式注册表的容器，即使一切都安装成功，模式注册表每 10 秒左右重新启动一次，我无法联系服务 (localhost:8085) 来添加我的模式，所以我想知道是否可以在 Confluent 服务套件之外运行 Confluent Schema Registry，在这里是我的 YAML 文件：

version: '2'
services:
  kafka:
    image: wurstmeister/kafka
    container_name: kafka
    ports:
      - "9092:9092"
    environment:
      - KAFKA_ADVERTISED_HOST_NAME=127.0.0.1
      - KAFKA_ADVERTISED_PORT=9092
      - KAFKA_ZOOKEEPER_CONNECT=zookeeper:2181
      - KAFKA_LISTENERS=INTERNAL://:29092,EXTERNAL://:9092
      - KAFKA_ADVERTISED_LISTENERS=INTERNAL://kafka:29092,EXTERNAL://localhost:9092
      - KAFKA_LISTENER_SECURITY_PROTOCOL_MAP=INTERNAL:PLAINTEXT,EXTERNAL:PLAINTEXT
      - KAFKA_INTER_BROKER_LISTENER_NAME=INTERNAL
      - KAFKA_SCHEMA_REGISTRY_URL=schemaregistry:8085
    depends_on:
      - zookeeper

  zookeeper:
    image: wurstmeister/zookeeper
    container_name: zookeeper
    ports:
      - "2181:2181"
    environment:
      - KAFKA_ADVERTISED_HOST_NAME=zookeeper
   
  schemaregistry:
    image: confluentinc/cp-schema-registry:6.2.0
    restart: always
    depends_on:
      - zookeeper
    environment:
      SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: "zookeeper:2181"
      SCHEMA_REGISTRY_HOST_NAME: schemaregistry
      SCHEMA_REGISTRY_LISTENERS: "http://0.0.0.0:8085"
    ports:
      - 8085:8085

  kafdrop:
    image: obsidiandynamics/kafdrop
    container_name: kafdrop
    restart: "no"
    ports:
      - "9000:9000"
    environment:
      KAFKA_BROKERCONNECT: "kafka:29092"
      JVM_OPTS: "-Xms16M -Xmx48M -Xss180K -XX:-TieredCompilation -XX:+UseStringDeduplication -noverify"
      SCHEMAREGISTRY_CONNECT: schemaregistry:8085
    depends_on:
      - "kafka"

Answer 1

事实证明，Schema Registry 无法连接，因为 Kafka 没有使用“PLAINTEXT”作为内部代理侦听器名称，这是与 Kafdrop 一起使用的 YAML 版本，在将消息反序列化到 AVRO 时也可以使用：

version: '2'
services:
  kafka:
    image: wurstmeister/kafka
    container_name: kafka
    ports:
      - "9092:9092"
    environment:
      - KAFKA_ADVERTISED_HOST_NAME=127.0.0.1
      - KAFKA_ADVERTISED_PORT=9092
      - KAFKA_ZOOKEEPER_CONNECT=zookeeper:2181
      - KAFKA_LISTENERS=PLAINTEXT://:29092,EXTERNAL://:9092
      - KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://kafka:29092,EXTERNAL://localhost:9092
      - KAFKA_LISTENER_SECURITY_PROTOCOL_MAP=PLAINTEXT:PLAINTEXT,EXTERNAL:PLAINTEXT
      - KAFKA_INTER_BROKER_LISTENER_NAME=PLAINTEXT
      - KAFKA_SCHEMA_REGISTRY_URL=schemaregistry:8085

    depends_on:
      - zookeeper

  zookeeper:
    image: wurstmeister/zookeeper
    container_name: zookeeper
    ports:
      - "2181:2181"
    environment:
      - KAFKA_ADVERTISED_HOST_NAME=zookeeper
   
  schemaregistry:
    image: confluentinc/cp-schema-registry:6.2.0
    restart: always
    depends_on:
      - zookeeper
    environment:
      SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: "zookeeper:2181"
      SCHEMA_REGISTRY_HOST_NAME: schemaregistry
      SCHEMA_REGISTRY_LISTENERS: "http://0.0.0.0:8085"
    ports:
      - 8085:8085

  kafdrop:
    image: obsidiandynamics/kafdrop
    container_name: kafdrop
    restart: "no"
    ports:
      - "9000:9000"
    environment:
      KAFKA_BROKERCONNECT: "kafka:29092"
      JVM_OPTS: "-Xms16M -Xmx48M -Xss180K -XX:-TieredCompilation -XX:+UseStringDeduplication -noverify"
      SCHEMAREGISTRY_CONNECT: http://schemaregistry:8085
    depends_on:
      - "kafka"

Answer 2

你的两个 YAML 都不正确 你在动物园管理员中有： KAFKA_ADVERTISED_HOST_NAME

并且在模式注册表中，您在 kafkastore 中为 zookeeper 端口 2181....