Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
501 views
in Technique[技术] by (71.8m points)

python - Auto reloading flask server on Docker

I want my flask server to detect changes in code and reload automatically. I'm running this on docker container. Whenever I change something, I have to build and up again the container. I have no idea where's wrong. This is my first time using flask.

Here's my tree

├── docker-compose.yml
└── web
    ├── Dockerfile
    ├── app.py
    ├── crawler.py
    └── requirements.txt

and code(app.py)

from flask import Flask 
import requests
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello Flask!!'

if __name__ == '__main__':
    app.run(debug = True, host = '0.0.0.0')

and docker-compose

version: '2'
services:

  web:
    build: ./web
    ports:
     - "5000:5000"
    volumes:
     - ./web:/code

Please give me some advice. Thank you in advance.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Flask supports code reload when in debug mode as you've already done. The problem is that the application is running on a container and this isolates it from the real source code you are developing. Anyway, you can share the source between the running container and the host with volumes on your docker-compose.yaml like this:

Here is the docker-compose.yaml

version: "3"
services:
  web:
    build: ./web
    ports: ['5000:5000']
    volumes: ['./web:/app']

And here the Dockerfile:

FROM python:alpine

EXPOSE 5000

WORKDIR app

COPY * /app/

RUN pip install -r requirements.txt

CMD python app.py

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...