Flask and uWSGI Docker image

Docker image with only Flask uWSGI, to be used with a reverse proxy such as Traefik. No reverse proxy is included in the image.

Currently Alpine Python 3.11 image. If there is interest for a bigger matrix of tags, distributions or other publishing platforms, open an issue.

[Warning! uWSGI allocates memory by system's max fd size, which is often 1073741816, resulting in high memory usage right out of the box! Gunicorn image is instead recommended for Docker use.](grafana/oncall#1521 (comment))

Setup

Docker Compose

version: '3'

services:
  web:
    image: ghcr.io/jonpas/flask-uwsgi:latest
    volumes:
      - ./app:/app

Application

web/app.py:

from flask import Flask
from werkzeug.middleware.proxy_fix import ProxyFix

app = Flask(__name__)

app.wsgi_app = ProxyFix(app.wsgi_app, x_for=1, x_proto=1, x_host=1, x_prefix=1)

@app.route("/")
def hello_world():
    return "<p>Hello, World!</p>"

if __name__ == "__main__":
    app.run(host="0.0.0.0")

web/wsgi.py:

from web import app

if __name__ == "__main__":
    app.run()

wsgi.py is required for uWSGI to start correctly, however the application/folder name can be your own (web used as an example).

Reverse Proxy

Traefik

Setup a rule, an entrypoint and any TLS configuration you require. Service port will be 8000 automatically as the only one exposed in the container.