En el upstream configurar el cluster de servidores, con las ips internas y sus puertos si fuera necesario, en el default.conf
upstream miprojecto {
server WWW.XXX.YYY.ZZZ:1234;
server WWW.XXX.YYY.ZZZ:1235;
server WWW.XXX.YYY.ZZZ:1236;
server WWW.XXX.YYY.ZZZ:1237;
}
server {
listen 80;
server_name miwebsite.com;
location / {
proxy_pass http://miprojecto;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $server_name;
}
error_page 404 /errorPages/404.html;
}
conf.d/default.conf