I migrated a volume from VMware ESXI VMDK, and originally on VMware platform it's EFI boot mode and secure boot enabled. 

 I cloned the entire VMDK by clonzilla and restored on OpenStack as a volume.

I referred to this link https://docs.openstack.org/nova/latest/admin/secure-boot.html and uploaded that volume as an image. Then set properties.

Finally, I launched an instance with a target image, however, it cannot boot up with a blank and dark screen.

What's the right way to implement this?

 Thanks.