Has anyone looked into the possibility of migrating containers to VMs using something like libguestfs? If you found something couldn't run in a container, it might take you a while to spin up a VM to do the same thing, It'd be great to be able to leverage the templates you have to build VMs on demand too. I did ponder scripting it up using dd, mke3fs, mounting the image, untaring your template, installing a proper kernel and udev and then installing grub...