On 06:31 Wed 07 May , Trump.Zhang wrote: > Thanks for your further instructions. > > I think the situations I mentioned are the reasonable use cases. They are > similar to the "bootable" volume use cases, user can create an empty volume > and install os in it from an image or create bootable volume from instance > ([1]). > > If volume metadata is not intended to be interpreted by cinder or nova as > meaning anything, maybe Cinder needs to add support for updating some of > glance_image_metadata of volume or introduce new property for volume like > "bootable" ? I don't think these two methods are good either. > > [1] https://blueprints.launchpad.net/cinder/+spec/add-bootable-option Volume already has a bootable field: https://github.com/openstack/cinder/blob/master/cinder/db/sqlalchemy/models.py#L122 -- Mike Perez