--- upgrade: - The DRBDManage driver is now removed. Customers using the DRBDManage driver should not upgrade Cinder without first migrating all volumes from their DRBDManage backend to a supported storage backend such as LINSTOR. Failure to migrate volumes will result in not being able to access volumes backed by the DRBDManage storage backend. deprecations: - The DRBDManage driver is deprecated as of the Stein release and is removed in the Train release. Users should use the new LINSTOR driver instead.