This alert fires when fewer than two nodes in the cluster have KVM resources.
The cluster must have at least two nodes with KVM resources for live migration.
Virtual machines cannot be scheduled or run if no nodes have KVM resources.
Identify the nodes with KVM resources:
$ kubectl get nodes -o jsonpath='{.items[*].status.allocatable}' | grep devices.kubevirt.io/kvm
Validate the hardware virtualization support.
If hardware virtualization is not available, software emulation can be enabled.