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Can I create a flavour with no local ephermal storage?

I want to set up a OpenStack solution where the compute nodes doesn't use local storage at all (except for OS and local applications), and where all storage is automatically allocated as Ceph RBD volumes. Is there any support of this out of the box in OpenStack?

The main reason for not using local storage at all, is to be able to do live-migrations on the guests, so that I can evict VMs for maintenance.

I know that I can set up a volume in Cinder, mark it as bootable, and spin up an instance using that volume. But I want the flavor to allocate ephermal storage for the glance-image automatically.