Deploy the FastAPI app on Debian with Nginx, Uvicorn, and Systemd.

Last week, I was exploring the options to deploy the FastAPI project on the VPS, and I found that it’s super easy to deploy the FastAPI app.

I will share a quick step-by-step guide that will cover the following :

• A domain configured with Nginx reverse proxy
• FastAPI app inside a virtual environment
• And also a background service that will ensure the app is always running even after a reboot.

Let’s start with Nginx. We will create a site-available config file for our app domain.

sudo nano /etc/nginx/sites-available/myappdomain.com

server {
    listen 80;
    server_name www.myappdomain.com myappdomain.com;

    location / {
        proxy_pass http://127.0.0.1:8000; # should match with the fastapi port
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

To enable the domain/site, we need to create a symbolic link to the site-available config file in the site-enabled directory of Nginx.

sudo ln -s /etc/nginx/sites-available/myappdomain.com /etc/nginx/sites-enabled/