Oh, one other thing to change: we shouldn't include the controller node in the compute-kvm and compute-qemu roles by default. So that would be:
```ruby
"nova-multi-compute-kvm" => kvm.map { |x| x.name if x.name != head.name },
"nova-multi-compute-qemu" => qemu.map { |x| x.name if x.name != head.name } 
```