What were you trying to do that didn't work?

error logs from virt-launcher pod:

{"component":"virt-launcher","kind":"","level":"error","msg":"Failed to start VirtualMachineInstance with flags 0.","name":"sev","namespace":"default","pos":"manager.go:1289","reason":"virError(Code=84, Domain=10, Message='Operation not supported: conversion of the nvram template to another target format is not supported')","timestamp":"2025-02-28T13:42:03.088214Z","uid":"ff0504f0-8d69-4015-8b73-060eef1d37ee"}

 

I login the container and do virsh start, it still reported the error 'conversion of the nvram template to another target format is not supported'

What is the impact of this issue to you?

Failed to start a SEV vm on kubevirt. Note I tried the latest stable version of kubevirt v1.4.0, it worked as expected, because the version of libvirt is 10.5.0

Please provide the package NVR for which the bug is seen:

1. kubectl version
   Client Version: v1.32.2
   Kustomize Version: v5.5.0
   Server Version: v1.32.2
2. virtctl version
   Client Version: version.Info{GitVersion:"v1.4.0", GitCommit:"9b9b3d4e7b681af96ca1b6b6a5cea75e2f05ce5b", GitTreeState:"clean", BuildDate:"2024-11-13T08:23:36Z", GoVersion:"go1.22.8 X:nocoverageredesign", Compiler:"gc", Platform:"linux/amd64"}
   Server Version: version.Info{GitVersion:"v1.5.0-beta.0.429+4917af49284f17-dirty", GitCommit:"4917af49284f170c40cfd673f92a68761471b9eb", GitTreeState:"dirty", BuildDate:"2025-02-26T08:35:55Z", GoVersion:"go1.23.4 X:nocoverageredesign", Compiler:"gc", Platform:"linux/amd64"}

 

Login the compute container of the virt-launcher pod:

bash-5.1$ virsh --version
10.10.0
bash-5.1$ cat /etc/os-release     
NAME="CentOS Stream"
VERSION="9"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="9"
PLATFORM_ID="platform:el9"
PRETTY_NAME="CentOS Stream 9"
ANSI_COLOR="0;31"
LOGO="fedora-logo-icon"
CPE_NAME="cpe:/o:centos:centos:9"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://issues.redhat.com/"
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux 9"
REDHAT_SUPPORT_PRODUCT_VERSION="CentOS Stream"

How reproducible is this bug?:

100%

Steps to reproduce

1. use kind to setup a local k8s cluster
2. deploy kubevirt built by myself

            On top of commit a6ece7c37c4466259219b666adc7776e2490bc54, apply the patch https://github.com/kubevirt/kubevirt/pull/13755 , make the build

       3. Create a SEV vm

snippet of VirualMachine

    spec:
      domain:
        machine:
          type: q35
        firmware:
          bootloader:
            efi:
              secureBoot: false
        launchSecurity:
          sev: {}
        features:
          acpi:
            enabled: true
          smm:
            enabled: false

snippet of dumped xml:
<os>
<type arch="x86_64" machine="pc-q35-rhel9.6.0">hvm</type>
<loader readonly="yes" secure="no" type="pflash" format="raw">/usr/share/OVMF/OVMF_CODE.cc.fd</loader>
<nvram template="/usr/share/OVMF/OVMF_VARS.fd" format="raw">/var/run/kubevirt-private/libvirt/qemu/nvram/testvm_VARS.fd</nvram>
<boot dev="hd"/>
<smbios mode="sysinfo"/>
</os>

Expected results

The vm should be started successfully

Actual results

Failed to start the vm