Question

我正在尝试为我的应用程序创建一个Docker容器，但是我的Docker脚本似乎出现了错误。每当我运行命令docker build - < Dockerfile时，都会得到以下输出：

我不确定为什么会这样，因为我的文件夹布局如下：

root folder, Docker ---
                       server ---- package.json
                                   api
                                   tests

如果文件夹布局有点混乱，我会将docker文件放在我的根文件夹中，并且在根文件夹中是一个名为 server 的文件夹，其中包含我的package.json，我的api文件和测试。

这是我的docker脚本：

# --- Base Node ---
FROM alpine:3.8 AS base
#install node
RUN apk add  --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/v3.7/main/ nodejs=8.9.3-r1 tini
# set working directory
WORKDIR /usr/src/app
# set tini as entrypoint
ENTRYPOINT ["/sbin/tini", "--"]
# copy project file
COPY . server/package*.json ./

# --- Dependencies ---
FROM base AS dependencies
# install node packages
RUN npm set progress=false && npm config set depth 0
RUN npm install .
# copy production node_modules aside
RUN cp -R node_modules prod_node_modules
# install ALL node_modules, including 'devDependencies'
RUN npm install

#
# ---- Test ----
# run linters, setup and tests
FROM dependencies AS test
COPY . .
RUN  npm run lint && npm run test

#
# ---- Release ----
FROM base AS release
# copy production node_modules
COPY --from=dependencies /root/server/prod_node_modules ./node_modules
# copy app sources
COPY server/ ./
# expose port and define CMD
EXPOSE 3003
CMD [ "npm", "start" ]

我用过this question as an example.

为什么我从docker脚本中收到此错误？

Answer 1

node_modules的需求由npm install根据解析package.json生成。

但是，并非所有package.json都会使npm install生成此文件夹，只有带有devDependencies，dependencies的文件夹才能生成nodes_moduls文件夹

我给您一个示例package.json，它可以解决这个问题：

package.json，它将生成node_modules：

{
    "name": "my-demo",
    "version": "1.0.0",
    "description": "a project",
    "main": "index.js",
    "scripts": {
        "build": "weex-builder src dist",
        "build_plugin": "webpack --config ./tools/webpack.config.plugin.js --color",
        "dev": "weex-builder src dist -w",
        "serve": "serve -p 8080"
    },
    "keywords": [
        "weex"
    ],
    "author": "xxx@gmail.com",
    "license": "MIT",
    "devDependencies": {
        "babel-core": "^6.14.0"
    },
    "dependencies": {
        "weex-html5": "^0.3.2"
    }
}

以上版本的构建将以“ next”结束：

Step 8/10 : RUN npm install .
 ---> Running in 181f572843bc
 > core-js@2.6.9 postinstall /usr/src/app/node_modules/core-js
 > node scripts/postinstall || echo "ignore"
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN my-demo@1.0.0 No repository field.
added 53 packages in 6.491s
Removing intermediate container 181f572843bc
 ---> 016c98d9650d
Step 9/10 : RUN cp -R node_modules prod_node_modules
  ---> Running in c24631cc4bc6
 Removing intermediate container c24631cc4bc6
  ---> de413db9140c

但是，如果您像下一个一样删除devDependencies和dependencies：

package.json不会生成node_modules：

{
    "name": "my-demo",
    "version": "1.0.0",
    "description": "a project",
    "main": "index.js",
    "scripts": {
        "build": "weex-builder src dist",
        "build_plugin": "webpack --config ./tools/webpack.config.plugin.js --color",
        "dev": "weex-builder src dist -w",
        "serve": "serve -p 8080"
    },
    "keywords": [
        "weex"
     ],
    "author": "xxx@gmail.com",
    "license": "MIT"
 }

它将导致：

Step 8/10 : RUN npm install .
 ---> Running in 45031bd21886
 npm notice created a lockfile as package-lock.json. You should commit this file.
 npm WARN my-demo@1.0.0 No repository field.
up to date in 0.115s
Removing intermediate container 45031bd21886
 ---> f88364d0725d
Step 9/10 : RUN cp -R node_modules prod_node_modules
  ---> Running in 16cd11546db0
 cp: can't stat 'node_modules': No such file or directory
 The command '/bin/sh -c cp -R node_modules prod_node_modules' returned a non-zero code: 1

我的Docker Multi-Stage脚本出错

1 个答案: