Load Balancing Between Virtual Box

After a few try and error, I figure out the best tutorial to make Nginx load balancing works.

$ sudo gedit /etc/nginx/conf.d/loadbalancer.conf

upstream backend {
        server 192.168.56.110;
        server 192.168.56.120;

        server 192.168.56.130;

        server 192.168.56.120;

    }
	
    server {
        listen      80 default_server;
        listen      [::]:80 default_server;

        location / {
	        proxy_set_header    X-Real-IP $remote_addr;
	        proxy_redirect      off;
	        proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
	        proxy_set_header    Host $http_host;
		proxy_pass http://backend;
	}
}

$ sudo nginx -t

$ sudo systemctl restart nginx
$ sudo systemctl enable nginx

Ref: https://www.tecmint.com/use-nginx-as-http-load-balancer-in-linux/amp/

Image Credit : https://www.serverlab.ca/tutorials/windows/web-servers/load-balancing-web-servers-with-windows-server-2012-r2/