[root@ceph01 ~]#  sudo rpm -Uvh https://download.ceph.com/rpm-octopus/el7/noarch/ceph-mgr-dashboard-15.2.1-0.el7.noarch.rpm
Retrieving https://download.ceph.com/rpm-octopus/el7/noarch/ceph-mgr-dashboard-15.2.1-0.el7.noarch.rpm
error: Failed dependencies:
        ceph-prometheus-alerts = 2:15.2.1-0.el7 is needed by ceph-mgr-dashboard-2:15.2.1-0.el7.noarch
        python3-cherrypy is needed by ceph-mgr-dashboard-2:15.2.1-0.el7.noarch
        python3-jwt is needed by ceph-mgr-dashboard-2:15.2.1-0.el7.noarch
        python3-routes is needed by ceph-mgr-dashboard-2:15.2.1-0.el7.noarch