Debugging a Flask app running in Gunicorn

Question

I\'ve been working on a new dev platform using nginx/gunicorn and Flask for my application.

Ops-wise, everything works fine - the issue I\'m having is with debugging

Answer 1

I had similiar problem when running flask under gunicorn I didn't see stacktraces in browser (had to look at logs every time). Setting DEBUG, FLASK_DEBUG, or anything mentioned on this page didn't work. Finally I did this:

app = Flask(__name__)
app.config.from_object(settings_map[environment])
if environment == 'development':
    from werkzeug.debug import DebuggedApplication
    app_runtime = DebuggedApplication(app, evalex=False)
else:
    app_runtime = app

Note evalex is disabled because interactive debbugging won't work with forking (gunicorn).