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Bug 2019524

Summary: libvirt fails to undefine a guest with `nvram` XML element
Product: Red Hat Enterprise Linux 8 Reporter: Benjamin Schmaus <bschmaus>
Component: libvirtAssignee: Virtualization Maintenance <virt-maint>
Status: CLOSED NOTABUG QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 8.4CC: abologna, drjones, lcapitulino, pkrempa, virt-maint
Target Milestone: rcFlags: pm-rhel: mirror+
Target Release: ---   
Hardware: aarch64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-11-03 18:43:41 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1885765    

Description Benjamin Schmaus 2021-11-02 18:15:31 UTC 
Description of problem:

libvirt fails to undefine a guest that has 'nvram' XML element with

[root@master-0 openshift-aio]# virsh list --all
 Id   Name           State
-------------------------------
 -    ocp4-bastion   shut off
 -    ocp4-master1   shut off
 -    ocp4-master2   shut off
 -    ocp4-master3   shut off

[root@master-0 openshift-aio]# virsh undefine ocp4-bastion
error: Failed to undefine domain 'ocp4-bastion'
error: Requested operation is not valid: cannot undefine domain with nvram

Version-Release number of selected component (if applicable):

[root@master-0 openshift-aio]# uname -r; rpm -q libvirt-daemon-kvm libvirt libvirt-client
4.18.0-305.19.1.el8_4.aarch64
libvirt-daemon-kvm-7.0.0-14.1.el8.aarch64
libvirt-7.0.0-14.1.el8.aarch64
libvirt-client-7.0.0-14.1.el8.aarch64

How reproducible:
100%

Steps to Reproduce:
1.Have a guest (AArch64 in this case) with 'nvram' XML element:

[root@master-0 openshift-aio]# virsh dumpxml ocp4-bastion
<domain type='kvm'>
  <name>ocp4-bastion</name>
  <uuid>2b6d9b4d-be35-435e-b23f-49b1149dea29</uuid>
  <metadata>
    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
      <libosinfo:os id="http://redhat.com/rhel/8.1"/>
    </libosinfo:libosinfo>
  </metadata>
  <memory unit='KiB'>16777216</memory>
  <currentMemory unit='KiB'>16777216</currentMemory>
  <vcpu placement='static'>8</vcpu>
  <os>
    <type arch='aarch64' machine='virt-rhel8.4.0'>hvm</type>
    <loader readonly='yes' type='pflash'>/usr/share/edk2/aarch64/QEMU_EFI-silent-pflash.raw</loader>
    <nvram>/var/lib/libvirt/qemu/nvram/ocp4-bastion_VARS.fd</nvram>
    <boot dev='hd'/>
  </os>

2. [root@master-0 openshift-aio]# virsh undefine ocp4-bastion
error: Failed to undefine domain 'ocp4-bastion'
error: Requested operation is not valid: cannot undefine domain with nvram


Actual results:

[root@master-0 openshift-aio]# virsh undefine ocp4-bastion
error: Failed to undefine domain 'ocp4-bastion'
error: Requested operation is not valid: cannot undefine domain with nvram


Expected results:
It should be possible to undefine the libvirt guest with 'nvram' XML element.

Additional info:
Can be deleted through virt-manager
Comment 1 Peter Krempa 2021-11-03 08:08:26 UTC 
Could you please retry with the '--nvram' option for 'virsh undefine'?

'man virsh' says:

   undefine
       Syntax:

          undefine domain [--managed-save] [--snapshots-metadata]
             [--checkpoints-metadata] [--nvram] [--keep-nvram]
             [ {--storage volumes | --remove-all-storage
                [--delete-storage-volume-snapshots]} --wipe-storage]

[...]

       --nvram and --keep-nvram specify accordingly to delete or keep nvram (/domain/os/nvram/) file. If the  domain  has  an  nvram
       file and the flags are omitted, the undefine will fail.
Comment 2 Benjamin Schmaus 2021-11-03 18:43:41 UTC 
That does indeed seem to work:

[root@master-0 openshift-aio]# virsh undefine ocp4-bastion
error: Failed to undefine domain 'ocp4-bastion'
error: Requested operation is not valid: cannot undefine domain with nvram

[root@master-0 openshift-aio]# virsh undefine ocp4-bastion --nvram
Domain 'ocp4-bastion' has been undefined