通过Docker主机名在两个微服务之间进行通信

问题描述

现在如何工作:

Microservice X使用静态ip向Microservice Y发出REST API请求

Microservice X makes REST API request to Microservice Y with static ip

http://{ip-address}:{port}/doSomething

问题:

问题是我不能再保证静态IP.我不想使用docker主机名来解决这个问题:

The problem is that I can no long guarantee that static ip.I wan't to solve this by using the docker hostname instead:

http://hostname:{port}/doSomething

我尝试通过在docker-compose中创建使用的定义网络来实现这一目标:

I tried achieving this by creating a used defined network in docker-compose:

    #part of docker-compose file
    streamapp:
      hostname: twitterstreamapp
      image: twitterstreamapp
      container_name: twitterstreamapp
      restart: always
      ports:
        - '8090:8080'
      build:
        context: ./TwitterStream
        dockerfile: Dockerfile

    storeapp:
      hostname: twitterstoreapp
      image: twitterstoreapp
      container_name: twitterstoreapp
      restart: always
      ports:
        - '8095:8080'
      build:
        context: ./TwitterStore
        dockerfile: Dockerfile
      depends_on:
        - 'mysql-db'
      networks:
        - backend

  volumes:
    MyDataVolume:

  networks:
    backend:
      driver: bridge

我可以从容器X到容器Y进行ping操作.例如，不能卷曲.我该如何解决这个问题，或者这不是实现我想要的最佳方法.

I can ping from Container X to Container Y. But not Curl for example.How can I fix this, or is this not the best way to achieve what I want.

推荐答案

解决方案非常简单，您可以使用服务名称来代替IP或主机名.

The solution is very simple, instead of using IPs or Hostnames you can use the service's name.

在您的示例中，在streamapp服务中，您可以使用http://storeapp:8080访问其他服务.

In your example, in the streamapp service you can access the other by using http://storeapp:8080.

类似地，在storeapp服务中，您可以在http://streamapp:8080处访问另一个.

Similar, in the storeapp service you can access the other at http://streamapp:8080.

请不要使用内部端口，而不要使用导出的端口.

Please not that you must use the internal ports, not the exported ones.

当您从其他机器(即从互联网)访问服务时，此方法不适用.在这种情况下，您必须使用http://{IP_OF_THE_MACHINE}:8090

This does not apply when you access the service from the other machines, i.e. from the internet. In that case you must use the form http://{IP_OF_THE_MACHINE}:8090

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