I tried something, and it seems to work. I put preload_app = True in my gunicorn.conf and now the lock seems to be shared. I am still looking into exactly what’s happening here but for now this is good enough, YMMV.
Let me attempt an answer. Let us assume that at the beginning my deployment only has a single gunicorn worker. This allows me to handle only one request at a time. My worker’s work is just to make a call to google.com and get the search results for a query. Now I want to increase … Read more
You could try upgrading the timeout for your proxy pass in Nginx by adding: proxy_connect_timeout 75s; proxy_read_timeout 300s; on /var/nginx/sites-available/[site-config] or /var/nginx/nginx.conf if you want to increase the timeout limite on all sites served by nginx. You must add –timeout 300 as well to your gunicorn process/config. This solved my problems in the past with … Read more
My comment doesn’t show the whole picture. When I’ve run Django sites on subfolders, I like to use a dynamic config so that you can still access the machine directly (without the proxy) and have a working web-app. This can help a LOT for debugging tricky stuff like this that is hard to reproduce in … Read more
As Dhaivat said, you can just use your Flask app directly with Gunicorn. If you still want to use Flask-Script, you will need to create a custom Command. I don’t have any experience with Gunicorn, but I found a similar solution for Flask-Actions and ported it to Flask-Script, although be warned, it’s untested. from flask_script … Read more
Gunicorn (and most WSGI servers) defaults to looking for the callable named application in whatever module you point it at. Adding an alias from myproject import myapp as application or application = myapp will let Gunicorn discover the callable again. However, the wsgi.py file or the alias aren’t needed, Gunicorn can be pointed directly at … Read more
run guncorn with –preload can see the error log, like this gunicorn app:application –preload -b 0.0.0.0:5000 This will usually give you a more detailed error message.
Pre-forking basically means a master creates forks which handle each request. A fork is a completely separate *nix process. Update as per the comments below. The pre in pre-fork means that these processes are forked before a request comes in. They can however usually be increased or decreased as the load goes up and down. … Read more
You could do that by creating a custom Formatter using the built-in logger module. You can use the extra parameter when logging messages to pass contextual information, such as url and headers. Python’s JSON module already implements pretty-printing JSON data in the dump() function, using the indent parameter that allows you to define the indent … Read more
You can start your app with multiple workers or async workers with Gunicorn. Flask server.py from flask import Flask app = Flask(__name__) @app.route(“https://stackoverflow.com/”) def hello(): return “Hello World!” if __name__ == “__main__”: app.run() Gunicorn with gevent async worker gunicorn server:app -k gevent –worker-connections 1000 Gunicorn 1 worker 12 threads: gunicorn server:app -w 1 –threads 12 … Read more