Not sure of the KVM equivalent, but with vmware I export the VM as an OVA, then create the new vm in cloudstack from a template, selecting the exported OVA file. Hope this helps...
> Date: Thu, 26 Mar 2015 12:51:26 -0300
> From: n...@unesp.br
> To: users@cloudstack.apache.org
> Subject: How to import production VMs
>
> Hi there.
>
> How to correctly import a VM running in a external KVM(not controlled by
> Cloudstack) into Cloudstack?
>
> Best Regards
