Question

我最近开始从Docker容器运行postgres，并将后端迁移到单独的容器。这是我的docker-compose.yml文件

version: "3.7"
services:
   postgres:
      image: postgres:9.6-alpine
      ports:
         - "5432"
      volumes:
         - postgres_data:/var/lib/postgresql/data

   backend:
      build:
         context: ./
         dockerfile: Dockerfile
      volumes:
          - ../../:/var/www
      ports:
          - "3000:3000"
      links:
          - postgres
      restart: always
      environment:
         - PORT=3000
         - HOST=0.0.0.0
         - PG_HOST=postgres
         - PG_USER=postgres
         - PG_DATABASE=postgres
         - NODE_ENV=development

  volumes:
      postgres_data:

这是我的Dockerfile

FROM alpine:3.8

RUN apk add -U python g++ yarn nodejs npm make 
WORKDIR /var/www/server

COPY package*.json ./
RUN npm install

COPY . .
RUN pwd
RUN ls -l

EXPOSE 3000

CMD ["npm", "start"]

我的Makefile看起来像这样

build: docker-compose.yml
   docker-compose build
   touch build

dev: build
   docker-compose up

我的项目结构如下

server
├── app
│   ├── db
│   └── models
├── build
├── docker-compose.yml
├── Dockerfile
├── index.js
├── Makefile
├── package.json
├── package-lock.json
└── README.md

所以我运行make dev创建docker容器，当我实际启动docker容器时，我不断收到错误消息

npm ERR! path /var/www/server/package.json
npm ERR! code ENOENT
npm ERR! errno -2
npm ERR! syscall open
npm ERR! enoent ENOENT: no such file or directory, open '/var/www/server/package.json'

但是，我的ls -l在docker容器的项目目录中的输出是

-rwxrwxrwx    1 root     root           205 Apr  4 16:39 Dockerfile
-rwxrwxrwx    1 root     root            96 Apr  4 06:19 Makefile
-rwxrwxrwx    1 root     root           216 Apr  4 04:10 README.md
drwxrwxrwx    4 root     root          4096 Apr  4 16:36 app
-rwxrwxrwx    1 root     root             0 Apr  4 16:38 build
-rwxrwxrwx    1 root     root           561 Apr  4 16:39 docker-compose.yml
-rwxrwxrwx    1 root     root           205 Apr  4 16:36 index.js
drwxrwxrwx  176 root     root          4096 Apr  4 04:32 node_modules
-rwxrwxrwx    1 root     root         24143 Apr  4 04:28 package-lock.json
-rwxrwxrwx    1 root     root           676 Apr  4 16:36 package.json

和package.json在那里。我还尝试将CMD设置为仅在Dockerfile中的节点index.js，但这也不起作用，说找不到index.js，这使我相信我可能不在正确的目录中（？）。

Docker找不到package.json

0 个答案: