Check if VTX is enabled on hypervisor nodes

VTX is required when using KVM as hypervisor on compute nodes.

When the fact will be merged upstream, the lib/facter/vtx.rb file will be
dropped to use the one from facter-core.

Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>

manifests/compute/hypervisor.pp

@@ -54,6 +54,10 @@ class cloud::compute::hypervisor(
   include 'cloud::telemetry'
   include 'cloud::network'
 
+  if $libvirt_type == 'kvm' and ! $::vtx {
+    fail('libvirt_type is set to KVM and VTX seems to be disabled on this node.')
+  }
+
   # Backward compatibility
   # if has_ceph was enabled, we consider deployments run Ceph for Nova & Cinder
   if $has_ceph {