The virt-who daemon retrieves host-guest mapping information from one or more hypervisor management platforms. It can be run on one or more Red Hat Enterprise Linux systems and has two major functions:
Retrieve the mapping information of which virtual guest a hypervisor is running on in one of two ways:
- By running locally on the hypervisor (RHEL+KVM, RHEL-OSP, or RHEL-H)
- By using the hypervisor's management platform (RHEV with 2013 subs or RHEV-H, vSphere, Hyper-V)
Report the host-guest mapping to a subscription manager (Satellite 6, SAM or Red Hat Subscription Management (RHSM)) at a defined interval. The default interval value is 3600 seconds (one hour).
virt-who is required when working with any hypervisor if your subscription name includes the words "Virtual Datacenters", "4 Guests", or "Unlimited Guests". This app helps users configure virt-who.
When started, the app requests information about your virt-who usage and generates a configuration file based on the answers. It also provides instructions for updating your virt-who configuration.
The virt-who app reports to the following servers:
- Satellite 6
- Subscription Asset Manager
- Red Hat Customer Portal
The virt-who app retrieves host-guest mapping information from the following:
- VMware vSphere/vCenter (esx)
- Red Hat Virtualization Hypervisor (rhevm)
- Red Hat Enterprise Linux Hypervisor (vdsm)
- Microsoft Hyper-V (hyperv)
- XenServer (xen)