Windows 上连接虚拟机上docker的kafka报错unknown host

Kafka Listeners - Explained

https://rmoff.net/2018/08/02/kafka-listeners-explained/

The key thing is that when you run a client, the broker you pass to it is just where it’s going to go and get the metadata about brokers in the cluster from. The actual host & IP that it will connect to for reading/writing data is based on the data that the broker passes back in that initial connection—even if it’s just a single node and the broker returned is the same as the one connected to.

You need to set advertised.listeners (or KAFKA_ADVERTISED_LISTENERS if you’re using Docker images) to the external address (host/IP) so that clients can correctly connect to it. Otherwise they’ll try to connect to the internal host address–and if that’s not reachable then problems ensue.

Put another way, courtesy of Spencer Ruport:

LISTENERS are what interfaces Kafka binds to. ADVERTISED_LISTENERS are how clients can connect.

HOWTO: Connecting to Kafka on Docker

Here’s an example configuration:

listeners=INTERNAL://0.0.0.0:19092,EXTERNAL://0.0.0.0:9092
listener.security.protocol.map=INTERNAL:PLAINTEXT,EXTERNAL:PLAINTEXT
advertised.listeners=INTERNAL://ip-172-31-18-160.us-west-2.compute.internal:19092,EXTERNAL://ec2-54-191-84-122.us-west-2.compute.amazonaws.com:9092
inter.broker.listener.name=INTERNAL

错误

[thrd:kafka1:9092/1002]: kafka1:9092/1002: Failed to resolve 'kafka1:9092': 不知道这样的主机。 (after 2253ms in state CONNECT, 1 identical error(s) suppressed)

The brokers will advertise themselve using advertised.listeners (which seems to be abstracted with KAFKA_ADVERTISED_HOST_NAME in that docker image) and the clients will consequently try to connect to these advertised hosts and ports.

You will thus need to make sure the client can resolve and reach this advertised hostnames, e.g. by adding "kafka" to /etc/hosts on the client host.

192.168.0.11 是虚拟机上的IP，Windows Client 机上连不上虚拟机里面的docker网络172.20.0.14~16，而连接里必须跟KAFKA_ADVERTISED_LISTENERS的设置地址一样，在window上hosts文件设置

192.168.0.11 kafka1

192.168.0.11 kafka2

192.168.0.11 kafka3

public override void ConfigureServices(ServiceConfigurationContext context)
        {
            Configure<AbpKafkaOptions>(options =>
            {
                //options.Connections.Default.BootstrapServers = "127.0.0.1:9092";
                options.Connections.Default.BootstrapServers = "kafka1:9092,kafka2:9093,kafka3:9094";
            });
 
            Configure<AbpKafkaEventBusOptions>(options =>
            {
                options.GroupId = "MyGroupId2";
                options.TopicName = "MyTopicName";　

docker-compose.yml

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version: '3.7'
 
networks:
  br17219:
    external:
      name: br17219
 
services:
  zk1:
    image: zookeeper
    hostname: zk1
    container_name: zk1
    ports:
      - 2181:2181
      - 8181:8080
    environment:
      ZOO_MY_ID: 1
      ZOO_SERVERS: server.1=0.0.0.0:2888:3888;2181 server.2=zk2:2888:3888;2181 server.3=zk3:2888:3888;2181
    volumes:
      - /usr/local/zookeeper/zk1/data:/data
      - /usr/local/zookeeper/zk1/datalog:/datalog
    networks:
      br17219:
        ipv4_address: 172.20.0.11
 
  zk2:
    image: zookeeper
    hostname: zk2
    container_name: zk2
    ports:
      - 2182:2181
      - 8182:8080
    environment:
      ZOO_MY_ID: 2
      ZOO_SERVERS: server.1=zk1:2888:3888;2181 server.2=0.0.0.0:2888:3888;2181 server.3=zk3:2888:3888;2181
    volumes:
      - /usr/local/zookeeper/zk2/data:/data
      - /usr/local/zookeeper/zk2/datalog:/datalog
    networks:
      br17219:
        ipv4_address: 172.20.0.12
 
  zk3:
    image: zookeeper
    hostname: zk3
    container_name: zk3
    ports:
      - 2183:2181
      - 8183:8080
    environment:
      ZOO_MY_ID: 3
      ZOO_SERVERS: server.1=zk1:2888:3888;2181 server.2=zk2:2888:3888;2181 server.3=0.0.0.0:2888:3888;2181
    volumes:
      - /usr/local/zookeeper/zk3/data:/data
      - /usr/local/zookeeper/zk3/datalog:/datalog
    networks:
      br17219:
        ipv4_address: 172.20.0.13
       
  kafka1:
    image: wurstmeister/kafka
    depends_on:
      - zk1
      - zk2
      - zk3
    restart: always
    hostname: kafka1
    container_name: kafka1
    ports:
      - 9092:9092
    environment:
      KAFKA_ADVERTISED_HOST_NAME: kafka1
      KAFKA_ADVERTISED_PORT: 9092
      KAFKA_ZOOKEEPER_CONNECT: zk1:2181,zk2:2181,zk3:2181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka1:9092
      KAFKA_LISTENERS: PLAINTEXT://kafka1:9092
    volumes:
      - /usr/local/kafka/kafka1/logs:/kafka
    external_links:   
      - zk1
      - zk2
      - zk3
    networks:
      br17219:
        ipv4_address: 172.20.0.14
    extra_hosts:
      - kafka1:172.20.0.14
 
  kafka2:
    image: wurstmeister/kafka
    depends_on:
      - zk1
      - zk2
      - zk3
    restart: always
    hostname: kafka2
    container_name: kafka2
    ports:
      - 9093:9093
    environment:
      KAFKA_ADVERTISED_HOST_NAME: kafka2
      KAFKA_ADVERTISED_PORT: 9093
      KAFKA_ZOOKEEPER_CONNECT: zk1:2181,zk2:2181,zk3:2181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka2:9093
      KAFKA_LISTENERS: PLAINTEXT://kafka2:9093
    volumes:
      - /usr/local/kafka/kafka2/logs:/kafka
    external_links:   
      - zk1
      - zk2
      - zk3
    networks:
      br17219:
        ipv4_address: 172.20.0.15
    extra_hosts:
      - kafka2:172.20.0.15
 
  kafka3:
    image: wurstmeister/kafka
    depends_on:
      - zk1
      - zk2
      - zk3
    restart: always
    hostname: kafka3
    container_name: kafka3
    ports:
      - 9094:9094
    environment:
      KAFKA_ADVERTISED_HOST_NAME: kafka3
      KAFKA_ADVERTISED_PORT: 9094
      KAFKA_ZOOKEEPER_CONNECT: zk1:2181,zk2:2181,zk3:2181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka3:9094
      KAFKA_LISTENERS: PLAINTEXT://kafka3:9094
    volumes:
      - /usr/local/kafka/kafka3/logs:/kafka
    external_links:   
      - zk1
      - zk2
      - zk3
    networks:
      br17219:
        ipv4_address: 172.20.0.16
    extra_hosts:
      - kafka3:172.20.0.16
 
  kafka-manager:
    image: sheepkiller/kafka-manager:latest
    restart: always
    container_name: kafka-manager
    hostname: kafka-manager
    ports:
      - "9010:9000"
    links:            
      - kafka1
      - kafka2
      - kafka3
    external_links:   
      - zk1
      - zk2
      - zk3
    environment:
      ZK_HOSTS: zk1:2181,zk2:2181,zk3:2181                 
      TZ: CST-8
    networks:
      br17219:
        ipv4_address: 172.20.0.20
         
  efak:
    image: ydockerp/efak:2.0.8
    restart: always
    container_name: efak-manager
    hostname: efak
    ports:
      - "8048:8048"
    depends_on:
      - kafka1
      - kafka2
      - kafka3
    environment:
      ZK_HOSTS: zk1:2181,zk2:2181,zk3:2181
    networks:
      br17219:
        ipv4_address: 172.20.0.21