unable to load configuration from uwsgi

Question

I have below setup in my Python application

server.py

from bots.flask_app import app
from bots.flask_app.api import api
from bots.flask_app.public import public
from bots import db

from bots.commons.helpers.flask.json.serializer import make_alternative_encoder

from flask_debugtoolbar import DebugToolbarExtension

import logging

import bots.commons.managers.configuration as ConfigurationManager

logger = logging.getLogger()


#######
# Public functions
#######
def setup_db_and_app():
    # Flask application bootstrap
    config = ConfigurationManager.get_flask_rest_config()
    app.config.update(config)
    logger.debug('Flask configuration object: %s', app.config)

    # MongoDB connection initialization
    db.init_app(app)

    # Debug toolbar enabled only if Flask in debug mode
    if ConfigurationManager.get_raw_flask_rest_config()['flask']['debug']:
        DebugToolbarExtension(app)

    # Replace the serializer with the custom one (for ObjectId and DateTime serialization)
    app.json_encoder = make_alternative_encoder(app.json_encoder)

    # Register the components
    app.register_blueprint(api)
    app.register_blueprint(public)


def start_server():
    setup_db_and_app()
    logger.debug('Registered routes: %s', app.url_map)
    app.run(host='0.0.0.0')

main.py

import bots.flask_app.server as FlaskApp

import bots.commons.managers.log as LogManager

# Logging initialization
LogManager.init_logging()

# Defined in server.py
FlaskApp.start_server()

I am trying to see whether this applicator can bed served by uwsgi as below

uwsgi --socket 0.0.0.0:8080 --protocol=http -w main

The output is as follows

INFO:werkzeug: * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
INFO:werkzeug: * Restarting with stat
unable to load configuration from uwsgi

My questions 1. Where can I find the configurations which are causing this issue? 2. Can main.py be defined as a callable and used as a parameter for -w?

This is an app which is already written by someone and I am trying make this application served through uwsgi.

Any suggestions would be helpful

Thanks

Answer 1

I had the 'unable to load configuration from uwsgi' error too. According to flask uwsgi docs：

Please make sure in advance that any app.run() calls you might have in your application file are inside an if __name__ == '__main__': block or moved to a separate file. Just make sure it’s not called because this will always start a local WSGI server which we do not want if we deploy that application to uWSGI.

I move app.run() to if __name__ == '__main__':, and the problem solved. Maybe you can try to put FlaskApp.start_server() under if __name__ == '__main__':.