使用compose运行docker容器时，npm找不到package.json [英] npm can't find package.json when running docker container with compose

问题描述

我正在尝试将Angular 7客户端应用程序连接到本地的docker compose中。

I am trying to wire up my Angular 7 client app into docker compose locally.

当我进行docker组合时，出现以下错误：

I get the following error when I docker-compose up:

client-app    | npm ERR! errno -2
client-app    | npm ERR! syscall open
client-app    | npm ERR! enoent ENOENT: no such file or directory, open '/app/package.json'

Dockerfile：

Dockerfile:

FROM node:9.6.1

RUN mkdir -p /app
WORKDIR /app
EXPOSE 4200

ENV PATH /app/node_modules/.bin:$PATH

COPY . /app

RUN npm install --silent
RUN npm rebuild node-sass

CMD ["npm", "run", "docker-start"]

客户的组成部分是：

  client-app:
    image: ${DOCKER_REGISTRY-}client
    container_name: client-app
    ports:
      - "4200:81"
    build:
      context: .
      dockerfile: ClientApp/Dockerfile

package.json与Dockerfile一起位于ClientApp文件夹中，我假设为COPY。 / app应该将package.json复制到容器中。我在dockerignore中没有任何排除项。我正在将Docker用于Windows和Unix容器。我之前尝试过npm init（但是无论如何都会创建一个空的package.json），并仔细查看SO帖子，但大多数dockerfile定义看起来完全一样。我还尝试了：COPY package * .json ./并另外使用--no-cache构建映像。

package.json is in the ClientApp folder along-side Dockerfile, I would assume COPY . /app should copy the package.json to the container. I don't have any excludes in dockerignore. I am using Docker for Windows with Unix containers. I tried npm init before (but that will create an empty package.json anyway) and looked through the SO posts but most of the dockerfile definitions look exactly the same. I also tried: COPY package*.json ./ additionally and building the image with --no-cache.

推荐答案

您的 Dockerfile 很好，不需要 COPY package * .json ./-它将与您的整个应用程序一起复制。

Your Dockerfile is fine, and COPY package*.json ./ is not necessary - its being copied with your entire app.

问题出在您的 docker-compose 文件中。

您定义：

build:
      context: .
      dockerfile: ClientApp/Dockerfile

这意味着您的 Dockerfile 将接受docker-compose上下文，该上下文位于上面的1个目录中：

that means, your Dockerfile will accept the docker-compose context, which is 1 directory above:

├── docker-compose.yml -- this is the actual context
└── ClientApp
    ├── Dockerfile -- this is the expected context

因此，当CMD运行时，它位于 package.json 上方的1个目录中，因此它无法运行该命令并且容器退出。

so when the CMD is running, it is 1 directory above the package.json, therefore it cannot run the command and the container exits.

要对其进行修复，请为您的 docker-compose 文件提供正确的上下文：

to fix it, give your docker-compose file the correct context:

build:
      context: ClientApp
      dockerfile: Dockerfile

，它应该可以工作。

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