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Configuring the default CPU model

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Use the defaultCPUModel setting in the HyperConverged custom resource (CR) to define a cluster-wide default CPU model.

The virtual machine (VM) CPU model depends on the availability of CPU models within the VM and the cluster.

  • If the VM does not have a defined CPU model:

    • The defaultCPUModel is automatically set using the CPU model defined at the cluster-wide level.

  • If both the VM and the cluster have a defined CPU model:

    • The VM’s CPU model takes precedence.

  • If neither the VM nor the cluster have a defined CPU model:

    • The host-model is automatically set using the CPU model defined at the host level.

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Configuring the default CPU model

Configure the defaultCPUModel by updating the HyperConverged custom resource (CR). You can change the defaultCPUModel while OpenShift Virtualization is running.

The defaultCPUModel is case sensitive.
Prerequisites

  • Install the OpenShift CLI (oc).

Procedure

  1. Open the HyperConverged CR by running the following command:

    $ oc edit hyperconverged kubevirt-hyperconverged -n openshift-cnv

  2. Add the defaultCPUModel field to the CR and set the value to the name of a CPU model that exists in the cluster:

    apiVersion: hco.kubevirt.io/v1beta1
kind: HyperConverged
metadata:
 name: kubevirt-hyperconverged
 namespace: openshift-cnv
spec:
  defaultCPUModel: "EPYC"

  3. Apply the YAML file to your cluster.