What is this?
Gunicorn — 'Green Unicorn' — is a Python WSGI HTTP server for UNIX. It's the process that runs your Python web app and serves it to the world.
Gunicorn — 'Green Unicorn' — is a Python WSGI HTTP server for UNIX. It's the process that runs your Python web app and serves it to the world.Is Gunicorn a framework I build my app with, or a server I deploy?Neither a framework nor a library — it's a server you deploy in front of your finished app. It works with essentially any Python web framework: Django, Flask or Pyramid over WSGI; FastAPI, Starlette or Quart over ASGI.
Neither a framework nor a library — it's a server you deploy in front of your finished app. It works with essentially any Python web framework: Django, Flask or Pyramid over WSGI; FastAPI, Starlette or Quart over ASGI.How do I get it serving my app?Install the gunicorn package with pip, then point the gunicorn command at your application; the docs include a Quickstart and a dedicated Quick Start for ASGI apps.
Install the gunicorn package with pip, then point the gunicorn command at your application; the docs include a Quickstart and a dedicated Quick Start for ASGI apps.Which Python version does it need?Python 3.10 or newer.
Python 3.10 or newer.Is everything production-ready, or are there beta bits?The core server has been powering Python apps since 2010, but the two newest features are beta: HTTP/2 with multiplexed streams and Dirty Arbiters, both introduced in v25.
The core server has been powering Python apps since 2010, but the two newest features are beta: HTTP/2 with multiplexed streams and Dirty Arbiters, both introduced in v25.Where does it run — Linux, macOS, Windows?UNIX systems: Linux, macOS and FreeBSD (the repo even runs FreeBSD CI). It will not run on Windows.
UNIX systems: Linux, macOS and FreeBSD (the repo even runs FreeBSD CI). It will not run on Windows.Is it free to use, even commercially?Yes — it's MIT licensed and free, with no paid tiers.
Yes — it's MIT licensed and free, with no paid tiers.What are Dirty Arbiters?A beta Gunicorn feature, new in v25, aimed at heavy workloads like ML models or long-running tasks, with worker allocation done per app. If your app runs slow, resource-hungry jobs, this is the piece to watch.
A beta Gunicorn feature, new in v25, aimed at heavy workloads like ML models or long-running tasks, with worker allocation done per app. If your app runs slow, resource-hungry jobs, this is the piece to watch.Do people put it behind nginx?That's the classic setup: Gunicorn speaks the uWSGI binary protocol specifically so nginx can integrate with it directly.
That's the classic setup: Gunicorn speaks the uWSGI binary protocol specifically so nginx can integrate with it directly.How heavy is it on server resources?Light by design — the README calls it simply implemented, light on server resource usage, and fairly speedy. It's meant to sit in front of your app without eating the box.
Light by design — the README calls it simply implemented, light on server resource usage, and fairly speedy. It's meant to sit in front of your app without eating the box.What are similar projects?lua-nginx-module, sanic, nginx, caprover, nginx-proxy, h2o, openresty, webserver
lua-nginx-module, sanic, nginx, caprover, nginx-proxy, h2o, openresty, webserverWhich topics is it in?http-server, django, nginx, web-server, unix, deployment, fastapi, http, devops, backend, free, server
http-server, django, nginx, web-server, unix, deployment, fastapi, http, devops, backend, free, server