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POHow to use Flask-Script and Gunicorn
 

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  1. POHow to use Flask-Script and Gunicorn
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    <p>I'm working on on a Flask app using Flask's built in dev server. I start it using Flask-Script. I want to switch to using Gunicorn as the web server. To do so, do I need to write some sort of integration code between Flask-Script and Gunicorn? Or is Flask-Script irrelevant to running the app using Gunicorn?</p> <p>Thanks in advance!</p> <p>Props to @sean-lynch. The following is working, tested code based on his answer. The changes I made were:</p> <ul> <li><p>Options that aren't recognized by Gunicorn are removed from <code>sys.argv</code> in <code>remove_non_gunicorn_command_line_args()</code> before trying to start the server. Otherwise Gunicorn throws an error with a message like this: <code>error: unrecognized arguments: --port 5010</code>. I remove <code>-p</code> because, even though it doesn't cause the error, that's only because Gunicorn thinks its the short form of its <code>pidfile</code> option, which is obviously not what's intended.</p></li> <li><p>GunicornServer.handle() signature modified to match the method it overrides i.e. Command.handle()</p></li> </ul> <p>-</p> <pre><code>from flask_script import Command from gunicorn.app.base import Application class GunicornServer(Command): description = 'Run the app within Gunicorn' def __init__(self, host='127.0.0.1', port=8000, workers=6): self.port = port self.host = host self.workers = workers def get_options(self): return ( Option('-t', '--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, *args, **kwargs): host = kwargs['host'] port = kwargs['port'] workers = kwargs['workers'] def remove_non_gunicorn_command_line_args(): import sys args_to_remove = ['--port','-p'] def args_filter(name_or_value): keep = not args_to_remove.count(name_or_value) if keep: previous = sys.argv[sys.argv.index(name_or_value) - 1] keep = not args_to_remove.count(previous) return keep sys.argv = filter(args_filter, sys.argv) remove_non_gunicorn_command_line_args() from gunicorn import version_info if version_info &lt; (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: 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() manager.add_command('gunicorn', GunicornServer()) </code></pre>
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    1. COI think this can be easier, Install gunicorn in your environment, then you could make a gunicorn.conf file where you can just declare the gunicorn configuration(number of workers, bind the port, the pid, etc...), and then just call gunicorn -c gunicorn.conf runserver:app (yourrunappfile:yourapp variable)
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