Gunicorn

Original author(s)	Benoit Chesneau
Developer(s)	Gunicorn Developers
Initial release	20 February 2010; 14 years ago (2010-02-20)
Stable release	21.2.0[1]  / 19 July 2023; 8 months ago (19 July 2023)
Repository	github.com/benoitc/gunicorn
Written in	Python
Operating system	Cross-platform
Type	Web server
License	MIT License
Website	www.gunicorn.org

The Gunicorn "Green Unicorn" (pronounced jee-unicorn or gun-i-corn)^[2] is a Python Web Server Gateway Interface (WSGI) HTTP server. It is a pre-fork worker model, ported from Ruby's Unicorn project. The Gunicorn server is broadly compatible with a number of web frameworks, simply implemented, light on server resources and fairly fast.^[3] It is often paired with Nginx, as the two have complementary features.^[4]

Architecture

Server model^[5]

• Central master process to manage the workers
• Requests are handled by worker processes
• Components:
  • Master
  • Sync workers
  • Async workers
  • Tornado workers
  • AsyncIO workers

Features

^{[citation needed]}

• Natively supports WSGI, web2py, Django and Paster
• Automatic worker process management
• Simple Python configuration
• Multiple worker configurations
• Various server hooks for extensibility
• Compatible with Python 2.6+ and Python 3.2+^[6]