Rails 映像未从 docker-compose.yml 运行

Question

我有一个在 Docker 上运行的 rails 应用程序。我的源代码有以下文件：

Dockerfile

FROM ruby:2.6.0
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
RUN mkdir /myapp
WORKDIR /myapp
COPY Gemfile /myapp/Gemfile
COPY Gemfile.lock /myapp/Gemfile.lock
RUN bundle install
COPY . /myapp
CMD bash -c "rm -f tmp/pids/server.pid && rails s -p 3000 -b '0.0.0.0'"

docker-compose.yml

version: '3'
services:
 db:
  image: postgres
  volumes:
   - ./tmp/db:/var/lib/postgresql/data
  ports:
    - "5432:5432"
 redis:
  image: redis
  command: redis-server
  ports: 
    - "6379:6379"
 sidekiq:
  build: .
  command: bundle exec sidekiq
  depends_on:
    - redis
  volumes: 
    - .:/myapp
 web:
  build: .
  command: bash -c "rm -f tmp/pids/server.pid && rails s -p 3000 -b '0.0.0.0'"
  volumes:
   - .:/myapp
  ports:
   - "3000:3000"
  depends_on:
   - db
   - redis
   - sidekiq

它使用docker-compose up 正常运行，因为我在源代码级别运行它。

现在当我构建这个应用程序并将其推送到 Dockerhub 时

docker build -t myusername/rails-app .
docker push myusername/rails-app

我希望我可以从独立的docker-compose.yml 与源代码分开运行 rails 应用程序。

version: '3'
services:
 db:
  image: postgres
  volumes:
   - ./tmp/db:/var/lib/postgresql/data
  ports:
    - "5432:5432"
 redis:
  image: redis
  command: redis-server
  ports: 
    - "6379:6379"
 sidekiq:
  build: .
  command: bundle exec sidekiq
  depends_on:
    - redis
  volumes: 
    - .:/myapp
 web:
  image: myusername/rails-app:latest # <= Running the app now from the image
  command: bash -c "rm -f tmp/pids/server.pid && rails s -p 3000 -b '0.0.0.0'"
  volumes:
   - .:/myapp
  ports:
   - "3000:3000"
  depends_on:
   - db
   - redis
   - sidekiq

唯一运行的容器是redis 和db。 web 正在寻找这个

Could not locate Gemfile or .bundle/ directory

Answer 1

在第二个 docker-compose.yml 文件中，该文件应该在没有源代码的情况下在其他地方工作，您仍然有卷在容器中安装本地文件夹：

  volumes: 
    - .:/myapp

从 sidekiq 和 web 容器中删除它，它应该可以工作。

您还为 sidekiq 容器保留了 build: .，该容器仅对开发框有用。将其替换为 image 属性，指向您的图像。

总结您的docker-comspose.yaml 文件：

version: '3'
services:
 db:
  image: postgres
  volumes:
   - ./tmp/db:/var/lib/postgresql/data
  ports:
    - "5432:5432"
 redis:
  image: redis
  command: redis-server
  ports: 
    - "6379:6379"
 sidekiq:
  image: myusername/rails-app:latest
  command: bundle exec sidekiq
  depends_on:
    - redis
 web:
  image: myusername/rails-app:latest # <= Running the app now from the image
  command: bash -c "rm -f tmp/pids/server.pid && rails s -p 3000 -b '0.0.0.0'"
  ports:
   - "3000:3000"
  depends_on:
   - db
   - redis
   - sidekiq