If Horizon uses Cinder API v3 by default since Queens ([1])], why does the installation guide for Horizon [2] suggest to set in local_settings the v2 api for volume ?

OPENSTACK_API_VERSIONS = {

"identity": 3,

"image": 2,

"volume": 2,

}

[1] https://docs.openstack.org/releasenotes/horizon/queens.html

[2] https://docs.openstack.org/horizon/rocky/install/install-rdo.html

Thanks, Massimo