On Wed, May 20, 2015 at 12:01:37AM +0200, Flavio Percoco wrote: > On 19/05/15 17:19 +0100, Daniel P. Berrange wrote: > >In Nova we are attempting to model[1] the glance image metadata and > >properties using the Nova object model (now oslo.versionedobjects). > > > >The one item I'm stuck on understanding is the 'locations' field > >and more specifically the 'metadata' element in each location > >entry > > > > > >In the file glance/api/v2/images.py I can see this description > >of the data format: > > > > 'locations': { > > 'type': 'array', > > 'items': { > > 'type': 'object', > > 'properties': { > > 'url': { > > 'type': 'string', > > 'maxLength': 255, > > }, > > 'metadata': { > > 'type': 'object', > > }, > > }, > > 'required': ['url', 'metadata'], > > }, > > 'description': _('A set of URLs to access the image file kept in ' > > 'external store'), > > > > > >As you can see here, 'metadata' is just said to be of type 'object'. > > > >Is there somewhere that actually describes what is valid contents > >for this field ? Is it sufficient to assume the metadata will only > >ever be a dict of strings, or can the metadata be a complex type > >with arbitrarily nested data structures ? > > It's just arbitrary metadata for now, we don't have a specific format. > I'm curious to know if there are folks using this field. We do (did) > have a use case for it.
Yep, I'd be curious to understand just what it is used for in practice ? Is the data to be stored in there determined by python code, or by the local administrator or both ? Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev