Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/add-support-for-cinder-scheduler-hints. Description: When booting an instance with nova boot --block-device-mapping i.e. allowing Nova to autocreate storage for a new instance, there is currently no way for Nova to hint to the Cinder scheduler how it should go about creating/placing this volumes. This blueprint proposes adding support for storing cinder scheduler hints in Nova flavor extra-specs and adding in support for those hints to be passed to Cinder when volumes are created. Scheduler hints were added to python-cinderclient for the Cinder V2 API only so we would have to wait for the following blueprint to land in order to support this feature: https://blueprints.launchpad.net/nova/+spec/support-cinderclient-v2 Specification URL (additional information): None