*with my Cinder guy hat on*
You should either stop setting default_volume_type and assume that without manual setup Kolla will create volumes without volume type, or create a volume type for default backend. In general volume_type!=backend_name.
*with my Cinder guy hat on*
You should either stop setting default_volume_type and assume that without manual setup Kolla will create volumes without volume type, or create a volume type for default backend. In general volume_ type!=backend_ name.