Auto reloading flask server on Docker

user_7398129 0
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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.

docker flask python
4 Answers

Assuming your file structure is the below:

enter image description here

Dockerfile: (note WORKING DIR)

FROM python:3.6.5-slim
RUN mkdir -p /home/project/bottle
WORKDIR /home/project/bottle 
COPY requirements.txt .
RUN pip install --upgrade pip --no-cache-dir -r requirements.txt
COPY . .
CMD ["python", "app.py"]

Docker Compose:

version: '3'

services:
  web:
    container_name: web
    volumes:
      - './web:/home/project/bottle/'  <== Local Folder:WORKDIR
    build: ./web
    ports:
      - "8080:8080"
user_22762900

This is my example:

version: "3.8"

services:
  local-development:
    build:
      context: .
      dockerfile: Dockerfiles/development.Dockerfile
    ports:
      - "5000:5000"
    volumes:
      - .:/code

from flask import Flask

app = Flask(__name__)


@app.route('/')
def hello_world():
    return "hello world"


if __name__ in "__main__":
    app.run(host="0.0.0.0", port=5000, debug=True)

debug=True enables Flask to change as your code changes.

Docker already plugs into your fs events to change the code "in the container".

user_34865590
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