I tried to deploy ceph-osd with juju for the openstack installation  in this guide
https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/rocky/install-juju.html

but, when i depoy ceph-osd and ceph-mon, osd not acquire sdv disk, my 4 nodes have a sdb  with 2 TB, but vm not add this storage.

And another question, osd should not be installed on the host?