<pool type='rbd'>
  <name>rbd-pool</name>
  <capacity unit='bytes'>47256127143936</capacity>
  <allocation unit='bytes'>5537792235090</allocation>
  <available unit='bytes'>35978000121856</available>
  <source>
    <host name='ceph-mon-1.example.com' port='6789'/>
    <host name='ceph-mon-2.example.com' port='6789'/>
    <host name='ceph-mon-3.example.com' port='6789'/>
    <name>rbd</name>
  </source>
</pool>