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Description
Wrong error messages show when controller type in xml is different with guest
Version:
libvirt-1.0.5-1.el7.x86_64
How reproducible:
100%
Steps to Reproduce:
1.Prepare guest migration environment.
2.Install a guest and dumpxml for guest on one host.
# virsh dumpxml mig > test-controller.xml
It's controller part is as below:
<controller type='usb' index='0'>
<alias name='usb0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
</controller>
<controller type='ide' index='0'>
<alias name='ide0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<controller type='pci' index='0' model='pci-root'>
<alias name='pci0'/>
</controller>
3.Change one controller type in test-controller.xml,eg:change
<controller type='usb' index='0'>
<alias name='usb0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
</controller>
to:
<controller type='virtio-serial' index='0'>
<alias name='usb0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
</controller>
4.Do migration using test-controller.xml,the error messages showed are wrong.
# virsh migrate --live demo --xml test-controller.xml qemu+ssh://10.66.7.153/system
root.7.153's password:
error: unsupported configuration: Target domain disk controller count 4 does not match source 3
Actual results：
As describes.
error: unsupported configuration: Target domain disk controller count 4 does not match source 3
Expected results:
Something like:
error:Target controller type virtio-serial does not match source usb.
Additional info:
The same error shows when change the index of controller.
# cat /var/log/libvirt/libvirtd.log
2013-05-08 11:17:40.585+0000: 17384: info : libvirt version: 1.0.5, package: 1.el7 (Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>, 2013-05-02-09:04:52, x86-018.build.eng.bos.redhat.com)
2013-05-08 11:17:40.585+0000: 17384: error : virDomainDefCheckABIStability:12664 : unsupported configuration: Target domain disk controller count 4 does not match source 3
If you delete the implicit USB controller with index 0 from domain XML, libvirt will auto-add it anyway, which is why the domain with the virtio-serial controller has one more controller.
But I agree that the error message is wrong - only one of those 3 or 4 controller is a disk controller, so the word 'disk' doesn't belong there.
I've proposed a patch to make the error more generic:
https://www.redhat.com/archives/libvir-list/2013-May/msg00636.html
Verifying the bug with package:
libvirt-1.0.5-2.el7.x86_64
Steps as the bug description, after step 4 will get error info:
# virsh migrate --live mig --xml test_controller.xml qemu+ssh://xx.xx.xx.xx/system
root.xx.xx's password:
error: unsupported configuration: Target domain controller count 5 does not match source 4
error info DO NOT shows "disk" as expected.
Setting VERIFIED.
This request was resolved in Red Hat Enterprise Linux 7.0.
Contact your manager or support representative in case you have further questions about the request.
Description Wrong error messages show when controller type in xml is different with guest Version: libvirt-1.0.5-1.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1.Prepare guest migration environment. 2.Install a guest and dumpxml for guest on one host. # virsh dumpxml mig > test-controller.xml It's controller part is as below: <controller type='usb' index='0'> <alias name='usb0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='pci' index='0' model='pci-root'> <alias name='pci0'/> </controller> 3.Change one controller type in test-controller.xml,eg:change <controller type='usb' index='0'> <alias name='usb0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> to: <controller type='virtio-serial' index='0'> <alias name='usb0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> 4.Do migration using test-controller.xml,the error messages showed are wrong. # virsh migrate --live demo --xml test-controller.xml qemu+ssh://10.66.7.153/system root.7.153's password: error: unsupported configuration: Target domain disk controller count 4 does not match source 3 Actual results： As describes. error: unsupported configuration: Target domain disk controller count 4 does not match source 3 Expected results: Something like: error:Target controller type virtio-serial does not match source usb. Additional info: The same error shows when change the index of controller. # cat /var/log/libvirt/libvirtd.log 2013-05-08 11:17:40.585+0000: 17384: info : libvirt version: 1.0.5, package: 1.el7 (Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>, 2013-05-02-09:04:52, x86-018.build.eng.bos.redhat.com) 2013-05-08 11:17:40.585+0000: 17384: error : virDomainDefCheckABIStability:12664 : unsupported configuration: Target domain disk controller count 4 does not match source 3