Created attachment 994958 [details]
added code to select only nodes from virt_service enabled clusters for RHEVM

  self.username = self.config.username
  self.password = self.config.password

+ self.clusters_url = urlparse.urljoin(self.url, "/api/clusters")
  self.hosts_url = urlparse.urljoin(self.url, "/api/hosts")
  self.vms_url = urlparse.urljoin(self.url, "/api/vms")

...
...

  mapping = {}
+ clusters = {}

+  clusters_xml = ElementTree.parse(self.get(self.clusters_url))
   hosts_xml = ElementTree.parse(self.get(self.hosts_url))
   vms_xml = ElementTree.parse(self.get(self.vms_url))

+  for cluster in clusters_xml.findall('cluster'):
+     cluster_id = cluster.get('id')
+     virt_service = cluster.find('virt_service').text
+     if virt_service == 'true':
+       clusters[cluster_id] = []
					    
   for host in hosts_xml.findall('host'):
            id = host.get('id')
+           host_cluster = host.get('cluster')
+           host_cluster_id = host_cluster.get('id')
+           if host_cluster_id in clusters.keys():
            	mapping[id] = []

for host in hosts_xml.findall('host'):
  id = host.get('id')
- host_cluster = host.get('cluster')
- host_cluster_id = host_cluster.get('id')
+ host_cluster = host.findall('cluster')
+ host_cluster_id = host_cluster[0].get('id')
  if host_cluster_id in clusters.keys():
    mapping[id] = []

(There will be only one cluster object and that object must exist)

Sorry /usr/share/virt-who/virt/rhevm/rhevm.py

Thanks for the patch, I've applied it upstream and it will be part of rebased version of virt-who.

https://github.com/virt-who/virt-who/commit/c579c6cffd355cba48d89b6083ca317d785d5892

Fixed in virt-who-0.14-1.el7.

Verified it on virt-who-0.14-2.el7.noarch since virt-who hasn't send the gluster node to satellite.Therefore, verify it.

Verified version
virt-who-0.14-2.el7.noarch
subscription-manager-1.15.6-1.el7.x86_64
python-rhsm-1.15.3-1.el7.x86_64
SAM-1.4.1-RHEL-6-20141113.0

Precondition:
1 Deploy satellite6.0.8
2 Deploy RHEVM3.5.4, Then create cluster which has enable Gluster service, Then add two hosts to this gluster
3 Deploy gluster server 

Verified process:
1 Register system to satellite6.0.8
2 Configure virt-who run at rhevm mode to monitor rhevm
# cat /etc/sysconfig/virt-who  | grep -v ^# | grep -v ^$
VIRTWHO_BACKGROUND=1
VIRTWHO_DEBUG=1
VIRTWHO_RHEVM=1
VIRTWHO_RHEVM_OWNER=ACME_Corporation
VIRTWHO_RHEVM_ENV=Library
VIRTWHO_RHEVM_SERVER=https://10.66.79.83:443
VIRTWHO_RHEVM_USERNAME=admin@internal
VIRTWHO_RHEVM_PASSWORD=redhat
3. Restart virt-who system and check virt-who's log
# systemctl restart virt-who
# tail -f /var/log/rhsm/rhsm.log
2015-08-05 17:36:25,255 [INFO]  @virtwho.py:655 - Using configuration "env/cmdline" ("rhevm" mode)
2015-08-05 17:36:25,268 [DEBUG]  @virtwho.py:203 - Starting infinite loop with 3600 seconds interval
2015-08-05 17:36:25,771 [DEBUG]  @rhevm.py:123 - Cluster of host a24571ac-a983-425c-b9a9-25d34fa8c49a is not virt_service, skipped
2015-08-05 17:36:25,772 [DEBUG]  @rhevm.py:123 - Cluster of host ff01f1a7-76ca-4d32-8201-d509057a3b05 is not virt_service, skipped
2015-08-05 17:36:25,782 [DEBUG]  @subscriptionmanager.py:112 - Authenticating with certificate: /etc/pki/consumer/cert.pem
2015-08-05 17:36:30,376 [DEBUG]  @subscriptionmanager.py:146 - Checking if server has capability 'hypervisor_async'
2015-08-05 17:36:34,953 [DEBUG]  @subscriptionmanager.py:158 - Server does not have 'hypervisors_async' capability
2015-08-05 17:36:34,953 [INFO]  @subscriptionmanager.py:165 - Sending update in hosts-to-guests mapping: {}

Result:
virt-who hasn't send the host/guest mapping to satellite since Cluster of these two hosts are not virt_service

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2370.html