The KubeVirtNoAvailableNodesToRunVMs alert is triggered when all nodes in the
Kubernetes cluster are missing hardware virtualization or CPU virtualization
extensions. This means that the cluster does not have the necessary hardware
support to run virtual machines (VMs).
If this alert is triggered, it means that VMs will not be able to run on the cluster. This can have a significant impact on the operations of the cluster, as VMs may be used for critical applications or services.
To diagnose the cause of this alert, the following steps can be taken:
Check the hardware configuration of the nodes in the cluster. Make sure that all nodes have hardware virtualization or CPU virtualization extensions enabled.
Check the node labels in the cluster. Make sure that nodes with the necessary hardware support are labeled as such, so that VMs can be scheduled to run on these nodes.
To mitigate the impact of this alert, add nodes to the cluster that have hardware virtualization or CPU virtualization extensions enabled.
If you cannot resolve the issue, see the following resources: