On hypervisor (probably your workstation)
1) `yum install virt-who`

2) Edit ` /etc/virt-who.d/test.conf ` and update the rhsm_hostname, rhsm_username, rhsm_password (use dev server credentials)
```
[libvirt]
type=libvirt
server=qemu:///system
owner=Default_Organization
env=Library
hypervisor_id=hostname
rhsm_hostname=dev.example.com

rhsm_proxy_hostname=""
rhsm_username=admin
rhsm_password=changeme
rhsm_prefix=/rhsm
```
3) `virt-who -od`
4) check katello server content hosts