nginx balancer

upstream backend-servers {

    server 1.2.3.4:80;
    server 5.6.7.8:80;
    server 9.10.11.12:8080;
    # Descomentar para aplicar algoritmo de balanceo
    # solo 1
	#least_conn;
	#ip_hash;
}

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://backend-servers;
        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-Proto $scheme;
    }
}