[Django]-How can I setup Nginx Proxy Buffering with Gunicorn over Amazon EC2?

You’re looking for the nginx HttpProxyModule I believe.
You define a upstream in nginx

upstream webservers {
    server 12.34.567.12:8000;
    server 21.43.765.21:8000;
}

And then forward requests via proxy_pass to the upstream.

server {
    listen 443; //Port you want nginx to listen on
    location / {
        proxy_set_header Host $http_host;
        proxy_read_timeout 330;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://webservers ;
     }
}

And unless I’m mistaken the HttpProxyModule buffers the entire request before passing it on.
This may break some items that require streaming or interaction during this process but that’s a limit you face.

My nginx is a bit rusty so it might not work but it should be something along these lines