Comment 1 for bug 708754

As per a recent thread on the mailing list, my preference would be to remove nova.image altogether, and use Glance as the abstraction between image services, rather than having that abstraction inside Nova too. (I don't think that this was unanimously agreed.)

If we did this, then we'd remove image_service altogether, which is why nova.virt.xenapi is decoupled from that.

I don't know of any problems that would arise if image_service was out of sync with xenapi_image_service -- I'm expecting xenapi_image_service to take effect when using virt.xenapi, and image_service to take effect when using virt.libvirt.