Deploying with Gunicorn & Uvicorn
Understand how to deploy FastAPI in production using Gunicorn as a process manager with Uvicorn workers.
From Dev to Production
When you're developing a FastAPI app, you often run it using a simple command like uvicorn main:app --reload.
This is great for development, as it automatically restarts your server when you make changes. But it's not suitable for production environments.
Why? A single process isn't robust or scalable. If it crashes, your entire API goes down! Production needs stability, performance, and fault tolerance.
Uvicorn: The ASGI Heart
FastAPI is an ASGI framework. ASGI stands for Asynchronous Server Gateway Interface, a standard for Python web servers to communicate with asynchronous web applications.
Uvicorn is a lightning-fast ASGI server implementation. It's what allows your FastAPI application to handle requests asynchronously and efficiently.
Think of Uvicorn as the engine that powers your FastAPI car. It's fast, but it only has one driver (process) by itself.
All lessons in this course
- Dockerizing FastAPI Applications
- Deploying with Gunicorn & Uvicorn
- Cloud Deployment Strategies
- Managing Environment Variables and Secrets