Virt-who is not reporting few ESXi hosts from vCenter Cluster

Solution Verified - Updated

Environment

  • Red Hat Satellite 6
  • VMware ESXi

Issue

  • After following article How to filter hypervisors by their hostnames using virt-who resulted in some hypervisor to report correctly whereas a couple of filter_hosts didn't report to Satellite content-host page.

  • For example below is the filter applied in virt-who configuration file /etc/virt-who.d/rhev.conf

    filter_hosts=host1.example.com,host2.example.com,host3.example.com

  • From the above one, host1.example.com didn't report to satellite

Resolution

  • From Satellite server check the Hypervisor hostname is resolving to its name correctly using nslookup. Also from vCenter terminal run nslookup for the ESXi host.

  • Check Domain is set appropriately for the Hypervisor. Compare it with the one that reported correctly to the Satellite.

    vCenter --> host1.example.com --> Networking --> TCP/IP configuration --> Select the Stack from the table --> Click Edit --> DNS configuration

  • Here check Name and Domain for the ESX host. The Domain information should be mentioned.

  • Then restart virt-who service, run

    # service virt-who stop
# virt-who -d -o
# service virt-who start

  • Remove the existing filter and add a filter with the name of the missing hypervisor in /etc/virt-who.d/rhev.conf and check in the satellite web ui => Monitor => Tasks, dynflow of the Actions::Katello::Host::Hypervisors task for the names of the hypervisors reported. The same hypervisor host1.example.com in this case might be reported with a different name on the satellite web ui because of reuse of an old ip.

For more KB articles/solutions related to Virt-who and Virtual Datacenter (VDC) Subscriptions Issues, please refer to the Consolidated Troubleshooting Article for Virt-who and Virtual Datacenter (VDC) Subscriptions Issues

Root Cause

  • On vCenter console Domain information was missing for the ESX host

Diagnostic Steps

# virt-who -p | python -m json.tool | grep "^            \"uuid\""

        "uuid": "client1.example.com"
        "uuid": "client2.example.com"
        "uuid": "client3"
        "uuid": "client4"
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