docker-compose目录构建路径

Question

我正在尝试将我的应用程序拆分为两个 docker 服务 - 前端和后端，我的项目布局看起来与此类似。

| frontend
|  - ...
|  - Dockerfile.prod
| backend
|  - ...
|  - Dockerfile.prod
| docker-compose.yml

到目前为止，我只为前端编写了 docker 文件

FROM node:13.12.0-alpine as build
WORKDIR /app
ENV PATH /app/node_modules/.bin:$PATH
COPY package.json ./
COPY package-lock.json ./
RUN npm ci --silent
RUN npm install react-scripts@3.4.1 -g --silent
COPY . ./
RUN npm run build

FROM nginx:stable-alpine
COPY --from=build /app/build /usr/share/nginx/html
COPY nginx/nginx.conf /etc/nginx/conf.d/default.conf
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]

令我困扰的是，当我运行该图像独立时，一切都完美无缺，但是当我尝试将其放入 docker-compose.yml 文件时，此错误在

$  docker-compose.exe up -d --build
Building frontend
Traceback (most recent call last):
  File "docker-compose", line 6, in <module>
  File "compose\cli\main.py", line 72, in main
  File "compose\cli\main.py", line 128, in perform_command
  File "compose\cli\main.py", line 1077, in up
  File "compose\cli\main.py", line 1073, in up
  File "compose\project.py", line 548, in up
  File "compose\service.py", line 351, in ensure_image_exists
  File "compose\service.py", line 1106, in build
  File "site-packages\docker\api\build.py", line 148, in build
TypeError: You must specify a directory to build in path
[12540] Failed to execute script docker-compose

我浏览过类似的问题，但出于某种原因，他们的 none 的建议似乎适用于我的场景。

这是我的 docker-composer 文件

version: '3'

services:
  frontend:
    container_name: react-prod
    build:
      context: .
      dockerfile: frontend/Dockerfile.prod
    ports:
      - 6666:80

Answer 1

在您使用相对路径复制的前端 Dockerfile 中：COPY . ./.

当您使用 docker-compose 构建时，您提供的上下文将是 .，而不是包含 Dockerfile 的实际前端目录。所以我只是建议您在 docker-compose.yml 中而不是：

    build:
      context: .
      dockerfile: frontend/Dockerfile.prod

你应该有：

    build:
      context: ./frontend
      dockerfile: Dockerfile.prod

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