FlaskNGINX.md

Setup Flask Application with NGINX and gunicorn

Installation :

• Install dependancies apt install nginx certbot python3-certbot gunicorn
• Confirm gunicorn support for Python 3 using gunicorn --version
• Install Flask pip install flask and any other dependancies

NGINX Configuration :

• Create a file flask or any name in /etc/nginx/sites-available
• Add NGINX setup on this file as :

server {
    listen 80;
    server_name YOUR_IP_OR_DOMAIN;

    location / {
        proxy_pass http://localhost:8000;
        include /etc/nginx/proxy_params;
        proxy_redirect off;
    }
}

• Ensure "proxy_pass http://localhost:8000" is listening to the port the Flask App will be hosted in.
• Link this to sites-enabled using ln -s /etc/nginx/sites-available/flask /etc/nginx/sites-enabled
• Start and test NGINX systemctl enable nginx, systemctl start nginx, systemctl status nginx

Running gunicorn :

• cd to Project Directory and run gunicorn -b 0.0.0.0:8001 -w 3 index:app
• Ensure it binds to port as 0.0.0.0:PORT

Run gunicorn using & or setsid -f and the website is hosted!