Flask app running

Flask 3.0.3 · Werkzeug 3.0.4 · Python 3.12.5

This default page is served from a freshly initialised project. Define your first route handler to replace it. The application factory pattern is recommended for production deployments, with one factory per blueprint.

If you see this page in production, the WSGI worker is probably routing every URL to a missing-blueprint fallback. Check that create_app() registers every blueprint expected by your nginx config.

from flask import Flask
app = Flask(__name__)

@app.route("/")
def index():
    return "Hello from svc-flask-ams-3"

@app.route("/healthz")
def healthz():
    return {"status": "ok"}, 200

@app.errorhandler(404)
def not_found(e):
    return {"error": "not_found"}, 404

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

Registered routes

Method	Rule	Endpoint
GET	/	index
GET	/healthz	healthz
GET	/static/<path:filename>	static

Bind address 0.0.0.0:5000

Production command gunicorn -w 4 -b 0.0.0.0:5000 wsgi:app (4 sync workers, sync IO)

Environment FLASK_ENV=production · FLASK_DEBUG=0

Suggested next steps

Switch from app.run() to a production WSGI server
Place a reverse proxy in front (nginx, Caddy, traefik)
Register blueprints in an application factory function
Enable structured JSON logging through logging.config.dictConfig

svc-flask-ams-3.lab.example · started Tue 18 Nov 09:41 CET · serving via uWSGI fastcgi proxy