When setting up persistent vTPM for Openshift-Virt, the setup will fail if the guest hostname has dots in it:

Using the instructions at:

[https://www.redhat.com/en/blog/running-windows-11-and-2022-server-virtual-machines-red-hat-openshift-persistent-vtpm|https://www.redhat.com/en/blog/running-windows-11-and-2022-server-virtual-machines-red-hat-openshift-persistent-vtpm]

The configuration works properly, but if the guest VM name has dots in it, the persistent-tpm volume creation fails:

{code:java}
[20240701 07:18:41]❯ oc get vm/fedora.test.vm -o yaml
apiVersion: kubevirt.io/v1
kind: VirtualMachine
...
  name: fedora.test.vm
...
          tpm:
            persistent: true
...
  - lastProbeTime: null
    lastTransitionTime: "2024-06-28T22:45:11Z"
    message: 'failed to create virtual machine pod: Pod "virt-launcher-fedora.test.vm-n6l5j"
      is invalid: [spec.volumes[8].name: Invalid value: "fedora.test.vm-tpm": must
      not contain dots, spec.containers[0].volumeMounts[9].name: Not found: "fedora.test.vm-tpm",
      spec.containers[0].volumeMounts[10].name: Not found: "fedora.test.vm-tpm"]'
    reason: FailedCreate
    status: "False"
    type: Synchronized

Version-Release number of selected component (if applicable):{code:none}
OCP 4.14
Openshift-Virt: 4.14.6

Always

1. Set up cluster for persistent vTPM
2. Create VM with a name which has dots in it
3. Enable persistent vTPM for VM