Import VirtualBox Image with LUKS

At old server I have one VM (VirtualBox). I need to import it into OpenNebula KVM at other server. System of VM is Debain with LUKS encrypted drive. I tried to copy disk images, convert vdi images to qcow2, import them as OS images, create template and VM. It failed due to deployment file missing.

Is there any how-to for import already installed encrypted system without any modifications?