Chapter 3. Preparing a virt-who host
Use this procedure to configure a Red Hat Enterprise Linux 7 server to run the virt-who service for VMware vCenter and Microsoft Hyper-V. The server can be physical or virtual.
You do not need a separate virt-who host for Red Hat hypervisors.
- Install a Red Hat Enterprise Linux 7 server. Only a CLI environment is required. For more information, see the Red Hat Enterprise Linux 7 Installation Guide.
Register the server:
# subscription-manager register --auto-attach
Open a network port for communication between virt-who and the subscription service:
# firewall-cmd --add-port="443/tcp" # firewall-cmd --add-port="443/tcp" --permanent
Open a network port for communication between virt-who and each hypervisor or virtualization manager:
- VMware vCenter: TCP port 443
- Microsoft Hyper-V: TCP port 5985
# yum install virt-who
Optional: Edit the
/etc/sysconfig/virt-whofile to change or add global settings. These settings apply to all virt-who connections from this server.
Change the value of
VIRTWHO_INTERVALto specify how often, in minutes, virt-who queries the virtualization platform. Because the virtual machines are granted temporary subscriptions for up to seven days, frequent queries are not required; you can select an interval that suits the size of your environment. Once a day (
1440) is suitable for most environments.
If you want to use an HTTP proxy for virt-who communication, add a line specifying the proxy:
If you do not want to use an HTTP proxy for any virt-who communication from this server, add the following line:
- Change the value of
Start and enable the virt-who service:
# systemctl enable --now virt-who