从docker内部连接主机kafka包含spring boot服务

Question

I would like to connect to a kafka broker hosted on my local machine from a spring boot service inside a docker container on the same machine.

Kafka Listener config in spring boot. This works outside of the container on the local machine:

config.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "127.0.0.1:9092");
        config.put(ConsumerConfig.GROUP_ID_CONFIG, "my_test_application");
        config.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        config.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);

Kafka server properties file:

  # Hostname and port the broker will advertise to producers and consumers. 
 If not set, 
  # it uses the value for "listeners" if configured.  Otherwise, it will use 
 the value
  # returned from java.net.InetAddress.getCanonicalHostName().
 advertised.listeners=PLAINTEXT://localhost:9092

Docker file of image:

FROM openjdk:8-slim
 FROM apacheignite/ignite:2.4.0
 COPY decoupling.jar decoupling.jar
 EXPOSE 9081 3306 9092 2181
 CMD java -jar decoupling.jar

run command:

docker run decoupling

Answer 1

在docker run命令中使用--network =“host”，然后docker容器中的127.0.0.1将指向您的docker主机。