Load Balancing is a critical step when the number of users on your
site exceed the maximum number of users a single server can handle.
The aim of this task to set up a drupal 8 installation using two application
servers, a single database server and a load-balancer(you can use
HAProxy or apache mod_proxy_balancer or nginx proxy_pass) and
document all the steps involved in a blog post. This task mainly invovles
configuring the web sevrers and drupal installation to work with multiple
servers. Some helpful resources
are- https://www.drupal.org/node/425990
http://www.johnandcailin.com/blog/john/scaling-drupal-step-two-sticky-load-balancing-apache-modproxy