Public bug reported:
Executing the command
$ virt-install --import --name abc --disk
pool=tmp,path=r.qcow2,size=100,backing_store=releaser.qcow2,backing_format=qcow2,io=io_uring,cache=none,target.bus=scsi
--osinfo debian12
Followed by
$ virsh dumpxml abc
Shows this output:
<domain type='kvm' id='3'>
<name>abc</name>
<uuid>72ceb78b-be3e-4a4a-ab86-65d7dacace34</uuid>
...
<devices>
<emulator>/usr/bin/qemu-system-x86_64</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none' io='io_uring'
discard='unmap'/>
<source file='/home/erik/dev/ledgersmb-release-tools/vm/tmp/abc-4.qcow2'
index='1'/>
<backingStore type='file' index='2'>
<format type='qcow2'/>
<source
file='/home/erik/dev/ledgersmb-release-tools/vm/tmp/releaser.qcow2'/>
<backingStore/>
</backingStore>
<target dev='sda' bus='scsi'/>
<alias name='scsi0-0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
Note the <backingStore> element above.
Now for the problem, if you run:
$ virsh define <( virt-install --import --print-xml --name abc --disk
pool=tmp,path=r.qcow2,size=100,backing_store=releaser.qcow2,backing_format=qcow2,io=io_uring,cache=none,target.bus=scsi
--osinfo debian12 )
again followed by `virsh dumpxml abc`
<domain type='kvm'>
<name>abc</name>
<uuid>0795c243-3ecc-447e-b6ec-f0b4b605d244</uuid>
...
<devices>
<emulator>/usr/bin/qemu-system-x86_64</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none' io='io_uring'
discard='unmap'/>
<source
file='/home/erik/dev/ledgersmb-release-tools/vm/tmp/abc-10.qcow2'/>
<target dev='sda' bus='scsi'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
The difference between the two is that the latter involves `--print-xml`
and misses the `backingStore` element. The point here is that the second
should *also* have contained the backingStore.
PS: Reporting this bug here, because it's in the bug reporting guidelines of
the virt-manager project to report via the package ecosystem of the
distribution used to stimulate the bug.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: virtinst 1:4.1.0-3ubuntu0.1
ProcVersionSignature: Ubuntu 6.8.0-107045.45tux1-tuxedo 6.8.12
Uname: Linux 6.8.0-107045-tuxedo x86_64
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sun Oct 13 10:33:10 2024
PackageArchitecture: all
SourcePackage: virt-manager
UpgradeStatus: Upgraded to noble on 2024-09-21 (22 days ago)
modified.conffile..etc.default.apport:
# set this to 0 to disable apport, or to 1 to enable it
# you can temporarily override this with
# sudo service apport start force_start=1
enabled=0
mtime.conffile..etc.default.apport: 2024-07-12T10:35:22.451985
mtime.conffile..etc.init.d.apport: 2024-07-22T16:59:07
** Affects: virt-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
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https://bugs.launchpad.net/bugs/2084374
Title:
virt-install `--print-xml` doesn't list `backingStore`
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