docker-compose - Docker 构建缺少的 yarn 依赖项

Question

在 Dockerfile 中运行 yarn install 时无法获取 node_modules 文件夹

test-sof
├── docker-compose.yml
├── Dockerfile
├── package.json
└── yarn.lock

docker-compose.yml

version: '3'
services:
  web:
    build: .
    volumes:
      - .:/myapp

包.json

{
  "name": "site",
  "private": true,
  "dependencies": {
    "@rails/webpacker": "^3.2.1",
    "babel-preset-react": "^6.24.1",
    "prop-types": "^15.6.0",
    "react": "^16.2.0",
    "react-dom": "^16.2.0",
    "reactjs": "^1.0.0",
    "underscore": "^1.8.3"
  },
  "devDependencies": {
    "webpack-dev-server": "^2.11.1"
  }
}

码头文件

FROM ruby:2.5

RUN curl -sL https://deb.nodesource.com/setup_8.x | bash - && \
    curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
    apt-get update && \
    apt-get install -qq -y build-essential libpq-dev nodejs yarn

RUN mkdir /myapp
WORKDIR /myapp

ADD ./package.json /myapp/

RUN yarn install

时运行 yarn install 步骤的输出docker-compose 构建 :

Step 6/6 : RUN yarn install
---> Running in 3a0e7095ec81 
yarn install v1.3.2 
info No lockfile found. 
[1/4] Resolving packages... 
[2/4] Fetching packages... 
info fsevents@1.1.3: The platform "linux" is incompatible with this module. 
info "fsevents@1.1.3" is an optional dependency and failed compatibility check. Excluding it from installation. 
[3/4] Linking dependencies... 
warning "@rails/webpacker > postcss-cssnext@3.1.0" has unmet peer dependency "caniuse-lite@^1.0.30000697". 
warning " > webpack-dev-server@2.11.1" has unmet peer dependency "webpack@^2.2.0 || ^3.0.0". 
warning "webpack-dev-server > webpack-dev-middleware@1.12.2" has unmet peer dependency "webpack@^1.0.0 || ^2.0.0 || ^3.0.0". 
[4/4] Building fresh packages... 
success Saved lockfile. 
Done in 21.11s. 
Removing intermediate container 3a0e7095ec81  
---> 5720579a0f2a 
Successfully built 5720579a0f2a 
Successfully tagged testsof_web:latest

运行命令: docker-compose 运行 web bash 进入容器

root@11af1818e494:/myapp# ls    
Dockerfile  docker-compose.yml  package.json

不存在 node_modules 文件夹，但稍后在容器内运行时: yarn 安装 输出:

root@11af1818e494:/myapp# yarn install
yarn install v1.3.2
info No lockfile found. 
[1/4] Resolving packages... 
[2/4] Fetching packages... 
info fsevents@1.1.3: The platform "linux" is incompatible with this module. 
info "fsevents@1.1.3" is an optional dependency and failed compatibility check. Excluding it from installation. 
[3/4] Linking dependencies... 
warning "@rails/webpacker > postcss-cssnext@3.1.0" has unmet peer dependency "caniuse-lite@^1.0.30000697". 
warning " > webpack-dev-server@2.11.1" has unmet peer dependency "webpack@^2.2.0 || ^3.0.0". 
warning "webpack-dev-server > webpack-dev-middleware@1.12.2" has unmet peer dependency "webpack@^1.0.0 || ^2.0.0 || ^3.0.0". 
[4/4] Building fresh packages... 
success Saved lockfile. 
Done in 13.03s.

然后在列出时:

root@11af1818e494:/myapp# ls    
Dockerfile  docker-compose.yml  node_modules  package.json  yarn.lock

文件夹 node_modules 存在。为什么？

Answer 1

Dockerfile的这部分安装 yarn 包:

RUN mkdir /myapp
WORKDIR /myapp
ADD ./package.json /myapp/
RUN yarn install

文件夹 /myapp已创建， package.json复制到它并安装 yarn 包。构建成功，当然， node_modules文件夹在内置图像中。

但在那之后你开始构建镜像:

volumes:
  - .:/myapp

这意味着 docker-compose.yaml 所在文件夹的内容是安装到 /myapp容器内的文件夹，因此它涵盖了容器 /myapp 的内容文件夹。

您不需要将当前文件夹挂载到容器的文件夹来实现您想要的。只需从您的 docker-compose.yaml 中删除它:

version: '3'
services:
  web:
    build: .

现在你可以:

$ docker-compose build
$ docker-compose run web bash
root@558d5b0c2ccb:/myapp# ls -la
total 268
drwxr-xr-x   3 root root   4096 Feb 23 22:25 .
drwxr-xr-x  65 root root   4096 Feb 23 22:36 ..
drwxr-xr-x 818 root root  36864 Feb 23 22:25 node_modules
-rw-rw-r--   1 root root    333 Feb 23 22:07 package.json
-rw-r--r--   1 root root 219075 Feb 23 22:25 yarn.lock

编辑:

But what I want is when building the image, get these dependencies not when spinning up the containers. Otherwise I have another container which mounts de source code and needs this node_modules folder when running the "docker-compose up" and I'd like to avoid some kind of ugly sleep until the node_modules is finished. So I need present this folder on my root host before up the containers somehow

如果要实现上述目标，可以使用以下解决方法:

1. 您修改 Dockerfile一点:

FROM ruby:2.5

RUN curl -sL https://deb.nodesource.com/setup_8.x | bash - && \
    curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
    apt-get update && \
    apt-get install -qq -y build-essential libpq-dev nodejs yarn

RUN mkdir /build && mkdir /myapp
WORKDIR /build

ADD ./package.json /build/

RUN yarn install

WORKDIR /myapp

CMD cp -a /build/node_modules/ /myapp/

这意味着 yarn 包将构建在 /build 中。文件夹内的图像并复制到 /myapp容器启动后的文件夹。

2. 你用的是原版 docker-compose.yaml文件:

version: '3'
services:
  web:
    build: .
    volumes:
      - .:/myapp

当您开始时 web容器:

docker-compose up web

文件夹 node_modules复制到挂载文件夹，即 .主机上的文件夹。

3. 现在您可以启动任何容器，它将包含 node_modules文件夹内 /myapp :

docker-compose run web bash

因此，您将能够通过以下方式实现您的目标:

$ docker-compose build && docker-compose up web
$ docker-compose run web bash
root@4b38e60adfa3:/myapp# ls -la
total 64
drwxrwxr-x   3 1000 1000  4096 Feb 24 10:59 .
drwxr-xr-x  66 root root  4096 Feb 24 11:13 ..
-rw-rw-r--   1 1000 1000   497 Feb 24 10:55 Dockerfile
-rw-rw-r--   1 1000 1000    73 Feb 24 09:02 docker-compose.yaml
drwxr-xr-x 818 root root 40960 Feb 24 10:57 node_modules
-rw-rw-r--   1 root root   333 Feb 23 22:07 package.json