Rancher 2 HA - How to

What is the best way to script Rancher 2 HA? Ideally using AWS and cloudformation, but any method would help at this point. Rancher 1 made this very easy.

This is the current HA setup doc for v2.x:

https://rancher.com/docs/rancher/v2.x/en/installation/server-installation/ha-server-install/

404 Not Found. Broken link.

Latest link: https://rancher.com/docs/rancher/v2.x/en/installation/ha-server-install/