无法在主机网络上访问docker容器中的JHipster应用程序，无法与非主机网络上的其他容器进行通信 [英] JHipster application in docker container cannot be accessed on host network, cannot communicate with other containers on non-host network

问题描述

我正在尝试在OS X开发计算机上的docker容器中部署JHipster微服务和注册表.

I am trying to deploy my JHipster microservices and registry in docker containers on my OS X development machine.

我或多或少使用JHipster开箱即用的默认docker-compose配置来部署注册表:

I deploy the registry using more or less the default docker-compose configuration JHipster provides out of the box:

version: '2'
services:
    jhipster-registry:
        image: jhipster/jhipster-registry:v3.1.0
        volumes:
            - ./central-server-config:/central-config
        # When run with the "dev" Spring profile, the JHipster Registry will
        # read the config from the local filesystem (central-server-config directory)
        # When run with the "prod" Spring profile, it will read the configuration from a Git repository
        # See https://jhipster.github.io/microservices-architecture/#registry_app_configuration
        environment:
            - SPRING_PROFILES_ACTIVE=dev,native
            - SECURITY_USER_PASSWORD=admin
            - SPRING_CLOUD_CONFIG_SERVER_NATIVE_SEARCH_LOCATIONS=file:./central-config/localhost-config/
            # - GIT_URI=https://github.com/jhipster/jhipster-registry/
            # - GIT_SEARCH_PATHS=central-config
        ports:
            - 8761:8761

但是，当我使用docker run部署微服务时，会发生以下两种情况之一:

When I deploy my microservices using docker run, however, one of two things happens:

如果发布端口，我想使用-p 8080:8080启用微服务，以便可以通过浏览器访问它，则可以访问它，但是微服务找不到注册表.

If I publish the port I want to make the microservice available on using -p 8080:8080 so I can access it through the browser, I can reach it but the microservice cannot find the registry.

Could not locate PropertySource: I/O error on GET request for "http://jhipster-registry:8761/config/clientaggregator/dev,twilio": Connection refused (Connection refused); nested exception is java.net.ConnectException: Connection refused (Connection refused)

与此同时，我可以查看注册表可以正常运行的页面.

Meanwhile, I can view the pages the registry serves fine.

我可以通过在启动微服务时添加"--network = host"来解决此问题.但是，当我这样做时，这显然会覆盖本机到主机的端口映射，并且无法从浏览器访问微服务.

I can fix this by adding "--network=host" when starting the microservice. However, when I do that this apparently overrides the native-to-host port mapping and the microservice cannot be reached from the browser.

更奇怪的是，大约一周前，我使用的是完全相同的配置，效果很好.

What's more bizarre is that about a week ago I was using the exact same configuration, which worked fine.

如果我在Docker容器之外运行我的应用程序，则它可以正常连接到注册表.如果我创建其他容器，或者连接到微服务容器并通过curl访问配置URL，则会收到响应.

If I run my application outside of a docker container, it connects to the registry fine. If I create a different container, or connect to the microservice container and access the configuration url via curl, I get a response.

推荐答案

您的应用正在尝试使用名称jhipster-registry作为主机名来查找注册表.为此，您需要将注册表和应用添加到Docker网络.

Your app is trying to locate the registry using the name jhipster-registry as a host name. To be able to do that, you need to have your registry and app added to a docker network.

首先使用以下方法创建网络:

First create the network using:

docker network create my-network

通过给容器命名并将其添加到网络创建中来更新撰写文件:

Update the compose file by giving the container a name and adding it to the network create:

version: '2'
services:
    jhipster-registry:
        image: jhipster/jhipster-registry:v3.1.0
        volumes:
            - ./central-server-config:/central-config
        # When run with the "dev" Spring profile, the JHipster Registry will
        # read the config from the local filesystem (central-server-config directory)
        # When run with the "prod" Spring profile, it will read the configuration from a Git repository
        # See https://jhipster.github.io/microservices-architecture/#registry_app_configuration
        environment:
            - SPRING_PROFILES_ACTIVE=dev,native
            - SECURITY_USER_PASSWORD=admin
            - SPRING_CLOUD_CONFIG_SERVER_NATIVE_SEARCH_LOCATIONS=file:./central-config/localhost-config/
            # - GIT_URI=https://github.com/jhipster/jhipster-registry/
            # - GIT_SEARCH_PATHS=central-config
        ports:
            - 8761:8761
        networks:
            - my-network
        container_name: jhipster-registry


networks:
  my-network:
    external: true

运行应用程序时，请指定网络:

When running your application specify the network:

docker run --network=my-network ...

现在，您的应用程序可以使用jhipster-registry作为主机名与注册表进行通信.

Now your application can communicate with the registry using jhipster-registry as a hostname.

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