Bug 1141723
| Summary: | virt-v2v: error: disk sda has no defined format shows when converting xen hvm guest | ||||||
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| Product: | Red Hat Enterprise Linux 7 | Reporter: | tingting zheng <tzheng> | ||||
| Component: | libguestfs | Assignee: | Richard W.M. Jones <rjones> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 7.1 | CC: | codong, dyuan, juzhou, mbooth, mzhan, ptoscano, rjones | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | V2V | ||||||
| Fixed In Version: | libguestfs-1.27.47-1.1.el7 | Doc Type: | Bug Fix | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2015-03-05 13:44:50 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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The error message is correct: the input XML doesn't define the disk format, and so we have to guess. I have changed the error message to hopefully make it clearer. In libguestfs >= 1.27.47 it will say instead: virt-v2v: error: disk sda (...) has no defined format. The input metadata did not define the disk format (eg. raw/qcow2/etc) of this disk, and so virt-v2v will try to autodetect the format when reading it. However because the input format was not defined, we do not know what output format you want to use. You have two choices: either define the original format in the source metadata, or use the '-of' option to force the output format https://github.com/libguestfs/libguestfs/commit/77b371b18b6a7ad37105a595931514f542a04396 (In reply to tingting zheng from comment #0) > Additional info: > For xen pv guest,there is also no disk format defined in guest xml,bug xen > pv guest can be converted successfully. > # virsh dumpxml xen-pv-rhel4.8-i386 > <disk type='file' device='disk'> > <driver name='tap' type='aio'/> > <source file='/var/lib/xen/images/xen/xen-pv/xen-pv-rhel4.8-i386.img'/> > <target dev='xvda' bus='xen'/> > </disk> Not true! It's not very obvious, but "aio" == "raw" for bizarre historical reasons. I previously added a commit to virt-v2v which maps aio to raw: https://github.com/libguestfs/libguestfs/commit/0c295c8e23a90d3a3f5efcfa0452ecde7317e122 Tested with:
libguestfs-1.27.47-1.1.el7.x86_64
virt-v2v-1.27.47-1.1.el7.x86_64
# virt-v2v -ic xen+ssh://10.66.106.64 -os default rhel6.6-i386-hvm
[ 0.0] Opening the source -i libvirt -ic xen+ssh://10.66.106.64 rhel6.6-i386-hvm
[ 16.0] Creating an overlay to protect the source from being modified
[ 30.0] Opening the overlay
[ 52.0] Initializing the target -o libvirt -os default
virt-v2v: error: disk sda (json: { "file.driver" : "ssh", "file.path" :
"/var/lib/xen/images/rhel6.6-i386-hvm.img", "file.host" : "10.66.106.64",
"file.host_key_check" : "no" }) has no defined format.
The input metadata did not define the disk format (eg. raw/qcow2/etc) of
this disk, and so virt-v2v will try to autodetect the format when reading
it.
However because the input format was not defined, we do not know what
output format you want to use. You have two choices: either define the
original format in the source metadata, or use the '-of' option to force
the output format
If reporting bugs, run virt-v2v with debugging enabled and include the
complete output:
virt-v2v -v -x [...]
The error info mentioned in comment 2 has showed,so move the bug to VERIFIED.
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://rhn.redhat.com/errata/RHBA-2015-0303.html |
Created attachment 937546 [details] Detailed log file Description virt-v2v: error: disk sda has no defined format shows when converting xen hvm guest. Version: libguestfs-1.27.43-1.1.el7.x86_64 virt-v2v-1.27.43-1.1.el7.x86_64 libvirt-1.2.8-2.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1.Prepare a xen hvm guest. 2.Use virt-v2v to convert guest from xen. # virt-v2v -ic xen+ssh://10.66.106.64 -os default rhel6.6-i386-hvm [ 0.0] Opening the source -i libvirt -ic xen+ssh://10.66.106.64 rhel6.6-i386-hvm libvirt: Remote Driver error : unknown procedure: 212 [ 16.0] Creating an overlay to protect the source from being modified [ 30.0] Opening the overlay [ 52.0] Initializing the target -o libvirt -os default virt-v2v: error: disk sda (json: { "file.driver" : "ssh", "file.path" : "/var/lib/xen/images/rhel6.6-i386-hvm.img", "file.host" : "10.66.106.64", "file.host_key_check" : "no" }) has no defined format, you have to either define the original format in the source metadata, or use the '-of' option to force the output format If reporting bugs, run virt-v2v with debugging enabled and include the complete output: virt-v2v -v -x [...] # virsh dumpxml rhel6.6-i386-hvm <disk type='file' device='disk'> <driver name='file'/> <source file='/var/lib/xen/images/rhel6.6-i386-hvm.img'/> <target dev='hda' bus='ide'/> </disk> # qemu-img info rhel6.6-i386-hvm.img image: rhel6.6-i386-hvm.img file format: raw virtual size: 7.8G (8388608000 bytes) disk size: 7.8G Actual results： As described. Expected results: The default format of xen guest image is raw,virt-v2v can convert xen hvm guest successfully. Additional info: For xen pv guest,there is also no disk format defined in guest xml,bug xen pv guest can be converted successfully. # virsh dumpxml xen-pv-rhel4.8-i386 <disk type='file' device='disk'> <driver name='tap' type='aio'/> <source file='/var/lib/xen/images/xen/xen-pv/xen-pv-rhel4.8-i386.img'/> <target dev='xvda' bus='xen'/> </disk>