This is a set of scripts designed to allow you to install Rancher HA in AWS. These are rudimentary at best, and I assume no responsibility to any charges incurred by these scripts or any problems you may encounter through the use of them.
There are three sets of scripts provided, spot on-demand, and on-demand-eip. The spot terraform scripts will create spot requests; while these spot instances are cheaper, they are definitely not reliable and could cause issues if you try to run actual workloads on your instances. on-demand will create instances on-demand, and will thus cost more but provide a more reliable Rancher HA install. on-demand-eip creates instances with elastic IP's which will allow you to shut your instances down when not in use and recover them by booting them.