node.js - Windows 10 Home 上的 Docker Compose 找不到任何文件

Question

我正在尝试学习 Docker 和 Docker Compose 来设置一个小型示例 Node/express 服务器。我在 Windows 10 家庭版上运行 Docker 工具箱。以下是我的项目结构

root/ 
   docker-compose.yml
   Dockerfile
   index.js
   package.json

这是我的 Dockerfile

FROM node:8

WORKDIR /usr/app

COPY . .
RUN npm install --quiet

这是我的 docker-compose.yml

version: "2"
services:
  node:
    build: .
    working_dir: /usr/app
    environment:
      - NODE_ENV=production
    expose:
      - "3000:3000"
    command: "node index.js"

这是我的 package.json

{
  "name": "test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.16.4"
  }
}

这是我的index.js

const express = require('express')
const app = express()
const port = 3000

app.get('/', (req, res) => res.send('Hello World!'))

app.listen(port, () => console.log(`Example app listening on port ${port}!`))

我将在每个组件的文档中找到的各种示例混合在一起。但我无法让它运行。当我执行 docker-compose up 时，我得到以下信息:

$ docker-compose up
Building node
Step 1/5 : FROM node:8
8: Pulling from library/node
61be48634cb9: Pull complete
fa696905a590: Pull complete
b6dd2322bbef: Pull complete
32477089adb4: Pull complete
febe7209ec28: Pull complete
4364cbe57162: Pull complete
ace5c680ff94: Pull complete
4acd6a9b7a48: Pull complete
Digest: sha256:7b65413af120ec5328077775022c78101f103258a1876ec2f83890bce416e896
Status: Downloaded newer image for node:8
 ---> 82c0936c46c1
Step 2/5 : WORKDIR /usr/app
 ---> Running in 454ed6735e6e
Removing intermediate container 454ed6735e6e
 ---> 62d35be2db4c
Step 3/5 : COPY package.json .
 ---> fdbb25021d83
Step 4/5 : RUN npm install --quiet
 ---> Running in e535ef0bc18f
npm WARN test@1.0.0 No description
npm WARN test@1.0.0 No repository field.

added 48 packages from 36 contributors and audited 121 packages in 3.179s
found 0 vulnerabilities

Removing intermediate container e535ef0bc18f
 ---> 1a61e872c386
Step 5/5 : COPY . .
 ---> 56e765cf1c3c
Successfully built 56e765cf1c3c
Successfully tagged root_node:latest
WARNING: Image for service node was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
Creating root_node_1 ... done
Attaching to root_node_1
node_1  | module.js:550
node_1  |     throw err;
node_1  |     ^
node_1  |
node_1  | Error: Cannot find module '/usr/app/index.js'
node_1  |     at Function.Module._resolveFilename (module.js:548:15)
node_1  |     at Function.Module._load (module.js:475:25)
node_1  |     at Function.Module.runMain (module.js:694:10)
node_1  |     at startup (bootstrap_node.js:204:16)
node_1  |     at bootstrap_node.js:625:3
root_node_1 exited with code 1

我确实在谷歌搜索中发现 Windows 和文件权限存在一些问题，但我找不到任何更详细的信息。

编辑 1:我已从 docker-compose.yml 中删除了卷，当我使用适用于 MacOS 的 Docker CE 运行时，它工作正常。同样的事情在Windows中用Docker工具仍然找不到index.js

Answer 1

请您尝试以下操作。

在你的index.js中，暴露端口是3000，所以我们将在DockerFile中暴露相同的端口。

在docker-compose.yml中，完成了5000到3000端口的映射。其中 5000 个将作为主机 (Windows)，3000 个客户端 (Linux)。

Dockerfile:

FROM node:8

WORKDIR /usr/app

COPY package.json .
RUN npm install --quiet

COPY . . 
EXPOSE 3000
CMD [ "npm", "start" ]

docker-compose.yml

version: '3'
services:
  web:
    build: .
    ports:
     - "5000:3000"