Bug 1419395
| Summary: | Failed to force clone a guest with ISO file | ||||||
|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Xiaodai Wang <xiaodwan> | ||||
| Component: | libvirt | Assignee: | Pavel Hrdina <phrdina> | ||||
| Status: | CLOSED ERRATA | QA Contact: | yisun | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 7.4 | CC: | crobinso, dyuan, juzhou, kuwei, lmen, mxie, mzhan, phrdina, rbalakri, tzheng, xuzhang | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | libvirt-3.2.0-1.el7 | Doc Type: | If docs needed, set a value | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2018-04-10 10:39:40 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: | |||||||
| Attachments: |
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Created attachment 1247933 [details]
virt-clone debug
There's a similar against upstream libvirt: https://bugzilla.redhat.com/show_bug.cgi?id=972784 virsh vol-clone [isovol] fails as well. I think the best thing to do is teach libvirt that format=iso should just be format=raw when we pass the format to qemu-img I sent a libvirt patch upstream: http://www.redhat.com/archives/libvir-list/2017-March/msg00251.html Upstream commit:
commit 0e5db76262729e4c199e62c6cb00c90391073b4e
Author: Cole Robinson <crobinso>
Date: Mon Mar 6 16:50:53 2017 -0500
storage: Don't pass 'iso' format to qemu-img
test with:
libvirt-3.8.0-1.virtcov.el7.x86_64
qemu-kvm-rhev-2.10.0-3.el7.x86_64
1. prepare a iso image
## mkisofs -o /var/lib/libvirt/images/aaa.iso /tmp
## ll -h /var/lib/libvirt/images/aaa.iso
-rw-r--r--. 1 qemu qemu 8.5M Oct 31 14:10 /var/lib/libvirt/images/aaa.iso
## file /var/lib/libvirt/images/aaa.iso
/var/lib/libvirt/images/aaa.iso: # ISO 9660 CD-ROM filesystem data 'CDROM'
2. prepare a vm with following disks:
## virsh dumpxml v | grep disk -a5
...
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/var/lib/libvirt/images/RHEL-7.5-x86_64-latest.qcow2'/>
<backingStore/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/var/lib/libvirt/images/aaa.iso'/>
<backingStore/>
<target dev='hda' bus='ide'/>
<readonly/>
<alias name='ide0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
...
3. do the virt-clone with vm shutoff:
## virt-clone -o v -n testclone -f /var/lib/libvirt/images/clone.qcow2 -f /var/lib/libvirt/images/clone.iso --debug --force-copy=hda
...
[Tue, 31 Oct 2017 14:17:15 virt-clone 25422] DEBUG (storage:816) Creating storage volume 'clone.iso' with xml:
<volume>
<name>clone.iso</name>
<capacity>8812544</capacity>
<allocation>8814592</allocation>
<target>
<format type="iso"/>
</target>
</volume>
[Tue, 31 Oct 2017 14:17:15 virt-clone 25422] DEBUG (storage:880) Couldn't lookup storage volume in prog thread.
Allocating 'clone.iso' | 8.4 MB 00:00:00
[Tue, 31 Oct 2017 14:17:15 virt-clone 25422] DEBUG (storage:854) Storage volume 'clone.iso' install complete.
[Tue, 31 Oct 2017 14:17:15 virt-clone 25422] DEBUG (cloner:491) Duplicating finished.
Clone 'testclone' created successfully.
[Tue, 31 Oct 2017 14:17:15 virt-clone 25422] DEBUG (virt-clone:216) end clone
...
4. check the clone.iso same with original aaa.iso
## file /var/lib/libvirt/images/clone.iso
/var/lib/libvirt/images/clone.iso: # ISO 9660 CD-ROM filesystem data 'CDROM'\
## diff /var/lib/libvirt/images/aaa.iso /var/lib/libvirt/images/clone.iso; echo $?
0
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2018:0704 |
Description of problem: Failed to force clone a guest with ISO file Version-Release number of selected component (if applicable): virt-manager-1.4.0-2.el7.noarch How reproducible: 100% Steps to Reproduce: 1. Prepare a guest with a cdrom disk. <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/var/lib/libvirt/images/rhel7.3-3.qcow2'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/root/SLE-12-SP1-Server-DVD-x86_64-GM-DVD1.iso'/> <target dev='hda' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> 2. Clone the guest by below command. # virt-clone -o rhel7.3 -n testclone -f /var/lib/libvirt/images/rhel7.3-3.qcow2 -f /root/SLE-12-SP1-Server-DVD-x86_64-GM-DVD1.iso --debug --force-copy=hda Actual results: RuntimeError: Couldn't create storage volume 'cloned.iso': 'internal error: Child process (/usr/bin/qemu-img convert -f iso -O iso /root/SLE-12-SP1-Server-DVD-x86_64-GM-DVD1.iso /tmp/cloned.iso) unexpected exit status 1: qemu-img: Could not open '/root/SLE-12-SP1-Server-DVD-x86_64-GM-DVD1.iso': Unknown driver 'iso' Expected results: virt-clone should run successfully. Additional info: