I have a few EC2 instances that we created before we started using foreman. When I install puppet, and point it at my current Foreman/Puppet server, the instance makes contact, and runs a short puppet run. It is then available in the Foreman Hosts list.

When I Edit that machine, and attempt to assign it a hostgroup, when I hit Save, I get

undefined method `[]' for nil:NilClass

NoMethodError
undefined method `[]' for nil:NilClass
app/models/orchestration/compute.rb:185:in `validate_compute_provisioning'
app/models/orchestration.rb:64:in `valid?'
app/controllers/hosts_controller.rb:104:in `update'

tracking this down, I think I can fix the validation, so that if the compute_attributes are missing it creates reasonable defaults. Pull request coming (I am on the dev branch, mostly up-to-date)