无法从主机访问Dockerized Loopback 4应用程序 [英] Dockerized Loopback 4 app not reachable from the host

问题描述

有没有人成功地对Loopback-4(lb4)应用进行docker化? 我设置了一个基于lb4的应用程序，并试图对其进行docker化，但是尽管Docker似乎正在运行该应用程序，但它并未显示在我的本地主机上.

has anyone successfully dockerize a Loopback-4 (lb4) app? I set up an lb4 based app and am trying to dockerize it, but although the Docker seems to be running the app, it's not showing on my localhost.

我执行的步骤:

1. 在本地设置基于Loopback 4的应用程序
2. 创建Dockerfile(代码此处)
3. (cd进入Dockerfile所在的目录)构建:docker build -t lb4.
4. 运行:docker run -p 3000:3000 lb4

1. Setup Loopback 4 based app locally
2. Create Dockerfile (code here)
3. (cd into the dir where Dockerfile is) Build: docker build -t lb4 .
4. Run: docker run -p 3000:3000 lb4

但是，该应用程序未显示在 http://localhost:3000 上 运行容器的输出:

But, the app doesn't show up on http://localhost:3000 The output from running the container:

trip@1.0.0预启动/usr/src/app npm运行构建

trip@1.0.0 prestart /usr/src/app npm run build

trip@1.0.0构建/usr/src/app lb-tsc es2017 --outDir dist

trip@1.0.0 build /usr/src/app lb-tsc es2017 --outDir dist

trip@1.0.0开始/usr/src/app 节点.

trip@1.0.0 start /usr/src/app node .

服务器在 http://127.0.0.1:3000 上运行 尝试 http://127.0.0.1:3000/ping

Server is running at http://127.0.0.1:3000 Try http://127.0.0.1:3000/ping

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编辑

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EDIT

为了保留问题，将回购中的相关代码(第2步)粘贴到了这里，

For the sake of conserving the question, relevant code in the repo (step 2) is pasted here,

// index.js
const application = require('./dist');
module.exports = application;
if (require.main === module) {
  // Run the application
  const config = {
    rest: {
      port: +process.env.PORT || 3000,
      host: process.env.HOST || 'localhost',
      openApiSpec: {
        // useful when used with OASGraph to locate your application
        setServersFromRequest: true,
      },
    },
  };
  application.main(config).catch(err => {
    console.error('Cannot start the application.', err);
    process.exit(1);
  });
}

推荐答案

如@Henry在评论中所建议，在您的index.js中，更改为使用

As suggested by @Henry in the comment, in your index.js, change to use

  host: '0.0.0.0',

要了解有关localhost(127.0.0.1)和0.0.0.0之间的区别的更多信息，请参见

To know more about the different between localhost (127.0.0.1) and 0.0.0.0, see https://superuser.com/questions/949428/whats-the-difference-between-127-0-0-1-and-0-0-0-0

PS

最好在构建阶段使用npm run build，以便在运行时更快地启动.

It's better to have npm run build during the build phrase for faster start at run time.

这篇关于无法从主机访问Dockerized Loopback 4应用程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！