Flask deployment on gunicorn with flask script

Question

I have working flask app on my development server of flask which works fine. Now i want to take it one step further to deploy it using the gunicorn i have following code in which i can launch gunicorn but my application some where in middle drop connection but it works very fine DEV server.

I would like to know how to enable logging on with gunicorn.

I review the following que but could not get much information How to use Flask-Script and Gunicorn

My Application has following structure and /home/webusr/svsapp/svsappenv

manage.py has following code updated my manage.py with respect to following blog post

#!/usr/bin/env python import os import sys from gunicorn.app.base import Application from app import create_app,db from flask.ext.script import Manager, Shell , Server from flask.ext.migrate import Migrate, MigrateCommand from flask_script import Command,Option from app.models import SVSFaceTab,SVSuserReg,SVSIpCamReg app = create_app(os.getenv('SVS_CONFIG') or 'default') manager = Manager(app) migrate = Migrate(app, db) def make_shell_context(): return dict(app=app, db=db,SVSuserReg=SVSuserReg,SVSIpCamReg=SVSIpCamReg,SVSFaceTab=SVSFaceTab) manager.add_command("shell", Shell(make_context=make_shell_context)) manager.add_command('db', MigrateCommand) @manager.option('-h', '--host', dest='host', default='169.38.74.171') @manager.option('-p', '--port', dest='port', type=int, default=8080) @manager.option('-w', '--workers', dest='workers', type=int, default=10) @manager.option('-t', '--timeout', dest='timeout', type=int ,default=90) def gunicorn(host, port, workers,timeout): """Start the Server with Gunicorn""" from gunicorn.app.base import Application class FlaskApplication(Application): def init(self, parser, opts, args): return { 'bind': '{0}:{1}'.format(host, port), 'workers': workers,'timeout' : timeout } def load(self): return app application = FlaskApplication() return application.run() @manager.command def test(): """Run the unit tests.""" import unittest tests = unittest.TestLoader().discover('tests') unittest.TextTestRunner(verbosity=2).run(tests) if __name__ == '__main__': manager.run()

$ python manage.py gunicorn

gunicorn manage:app? (flask.pocoo.org/docs/0.10/deploying/wsgi-standalone/#gunicorn) — wgwz
– wgwz, Commented Dec 14, 2015 at 16:26
please add that to the OP and format it, so it's easier to read. — wgwz
– wgwz, Commented Dec 14, 2015 at 16:51
Why do you have from flask import Flask, request... and from datetime import datetime in manage.py? — wgwz
– wgwz, Commented Dec 14, 2015 at 17:23
Does your app definitely work on the development server in its current state? python manage.py runserver — wgwz
– wgwz, Commented Dec 14, 2015 at 17:24

Vinay Chittora · Accepted Answer · 2017-06-03 07:09:06Z

I am using this solution based on https://bitbucket.org/youngking/flask-actions/src/381d6eea3e78/flaskext/actions/server_actions.py?fileviewer=file-view-default#cl-81

class GunicornServer(Command): description = 'to run the app within Gunicorn' def __init__(self, host='0.0.0.0', port=5000, workers=2): self.port = port self.host = host self.workers = workers def get_options(self): return ( Option('-H', '--host', dest='host', default=self.host), Option('-p', '--port', dest='port', type=int, default=self.port), Option('-w', '--workers', dest='workers', type=int, default=self.workers), ) def handle(self, app, host, port, workers): from gunicorn import version_info if version_info < (0, 9, 0): from gunicorn.arbiter import Arbiter from gunicorn.config import Config arbiter = Arbiter( Config( {'bind': "%s:%d" % (host, int(port)), 'workers': workers} ), app ) arbiter.run() else: from gunicorn.app.base import Application class FlaskApplication(Application): def init(self, parser, opts, args): return { 'bind': '{0}:{1}'.format(host, port), 'workers': workers } def load(self): return app FlaskApplication().run() app = create_app(os.getenv('FLASK_CONFIG') or 'default') manager = Manager(app) # Adding gunicorn based runserver command manager.add_command("gunicorn", GunicornServer())

I am running the app like:

./manage.py gunicorn

Notice the last line manage.add_command, if you want you can just override "runserver" with GunicornServer() class.

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