Pass arbitrary key/value pairs to the scheduler. Admin-only host administration. Expose the internal project_id as an attribute of a volume. Quota management support. Types manage support. Volume encryption metadata retrieval support. Backups support. Enable snapshot manager actions. Enable volume actions Provide data on limited resources that are being used. Enable volume unmanage operation. Expose host as an attribute of a volume. Encryption support for volume types. Describe Availability Zones. QoS specs support. Type extra specs support. Expose migration_status as an attribute of a volume. Allow creating a volume from an image in the Create Volume v1 API. Extended services support. Extended SnapshotAttributes support. Show image metadata associated with the volume. Quota classes management support. Volume transfer management support. Allows existing back end storage to be 'managed' by cinder. Enable admin actions. Services support.