构建PythonFlask应用程序的Docker映像

　　我试图为PythonFlask应用程序构建一个Docker映像，但是有构建问题-所有文件都位于一个名为  web  -这是项目结构： web/     __init__.py     app.py     Dockerfile     models.py     requirements.txt
　　和  app.py  目前的情况如下： from flask import Flask  app = Flask(__name__)  @app.route(＂/＂) def hello_world():     return ＂Hello World!＂  if __name__ == ＂__main__＂:     app.run(debug=True,host=＂0.0.0.0＂)
　　我已经把  Dockerfile  从…Https://www.smartfile.com/blog/dockerizing-a-python-flask-application/ : FROM ubuntu:14.04  # Update OS RUN sed -i ＂s/# (.*multiverse$)/1/g＂ /etc/apt/sources.list RUN apt-get update RUN apt-get -y upgrade  # Install Python RUN apt-get install -y python-dev python-pip  # Add requirements.txt ADD requirements.txt /webapp  # Install wsgi Python web server RUN pip install uwsgi # Install app requirements RUN pip install -r requirements.txt  # Create app directory ADD . /webapp  # Set the default directory for our environment ENV HOME /webapp WORKDIR /webapp  # Expose port 8000 for uwsgi EXPOSE 8000  ENTRYPOINT [＂uwsgi＂, ＂--http＂, ＂0.0.0.0:8000＂, ＂--module＂, ＂app:app＂, ＂--processes＂, ＂1＂, ＂--threads＂, ＂8＂]
　　我试着用  docker build --no-cache --rm -t flask-app  ，但它以错误消息结尾： Successfully installed uwsgi Cleaning up...  ---> 9bbc004212a3 Removing intermediate container 70ed8f07c408 Step 8/13 : RUN pip install -r requirements.txt  ---> Running in f5e2eb59ffd1 Could not open requirements file: [Errno 2] No such file or directory: ＂requirements.txt＂ Storing debug log for failure in /root/.pip/pip.log The command ＂/bin/sh -c pip install -r requirements.txt＂ returned a non-zero code: 1
　　我认为对您的Dockerfile进行非常小的更改可以解决以下问题：  FROM ubuntu:14.04  # Update OS RUN sed -i ＂s/# (.*multiverse$)/1/g＂ /etc/apt/sources.list RUN apt-get update RUN apt-get -y upgrade  # Install Python RUN apt-get install -y python-dev python-pip  # Add requirements.txt # Create app directory ADD . /webapp  # Install wsgi Python web server RUN pip install uwsgi # Install app requirements # Full path to requirements RUN pip install -r /webapp/requirements.txt  # Set the default directory for our environment ENV HOME /webapp WORKDIR /webapp  # Expose port 8000 for uwsgi EXPOSE 8000  ENTRYPOINT [＂uwsgi＂, ＂--http＂, ＂0.0.0.0:8000＂, ＂--module＂, ＂app:app＂, ＂--processes＂, ＂1＂, ＂--threads＂, ＂8＂]
　　我刚把完整的路径添加到  requirements.txt  ，这可以通过几种不同的方式来完成，比如复制整个目录文件夹，然后构建它。
　　原文     Https://www.codesd.com/item/build-the-docker-image-of-a-python-flask-application.html