[Libguestfs] virt-v2v import from KVM without storage-pool ?

Fri Jul 7 12:01:54 UTC 2017

thanks for caring about this.

Ming Xie, are you opening this BZ bug?

thanks
matthias

Am 2017-07-07 um 13:31 schrieb Tomáš Golembiovský:
> Hi,
> 
> yes it is an issue in VDSM. We count on the disks being in storage pool
> (except for block devices).
> 
> Can you open a BZ bug for that please.
> 
> Thanks,
> 
>      Tomas
> 
> 
> On Fri, 7 Jul 2017 02:52:26 -0400 (EDT)
> Ming Xie <mxie at redhat.com> wrote:
> 
>> I could reproduce customer's problem
>>
>> Packages:
>> rhv:4.1.3-0.1.el7
>> vdsm-4.19.20-1.el7ev.x86_64
>> virt-v2v-1.36.3-6.el7.x86_64
>> libguestfs-1.36.3-6.el7.x86_64
>>
>> Steps:
>> 1.Prepare a guest which is not listed storage pool
>> # virsh dumpxml avocado-vt-vm1
>> ....
>>     <disk type='file' device='disk'>
>>        <driver name='qemu' type='qcow2'/>
>>        <source file='/root/RHEL-7.3-x86_64-latest.qcow2'/>
>>        <target dev='vda' bus='virtio'/>
>>        <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
>>      </disk>
>> .....
>> 2.Try to import this guest in rhv4.1 from KVM host but failed to import the guest as screenshot and get error info from vdsm.log
>> ....
>> 2017-07-07 14:41:22,176+0800 ERROR (jsonrpc/6) [root] Error getting disk size (v2v:1089)
>> Traceback (most recent call last):
>>    File "/usr/lib/python2.7/site-packages/vdsm/v2v.py", line 1078, in _get_disk_info
>>      vol = conn.storageVolLookupByPath(disk['alias'])
>>    File "/usr/lib64/python2.7/site-packages/libvirt.py", line 4555, in storageVolLookupByPath
>>      if ret is None:raise libvirtError('virStorageVolLookupByPath() failed', conn=self)
>> libvirtError: Storage volume not found: no storage vol with matching path '/root/RHEL-7.3-x86_64-latest.qcow2'
>> ....
>>
>>
>> 3.Try to convert this guest to rhv by virt-v2v on v2v conversion server,could import the guest from export domain to data domain on rhv4.1 after finishing conversion
>> # virt-v2v avocado-vt-vm1 -o rhv -os 10.73.131.93:/home/nfs_export
>> [   0.0] Opening the source -i libvirt avocado-vt-vm1
>> [   0.0] Creating an overlay to protect the source from being modified
>> [   0.4] Initializing the target -o rhv -os 10.73.131.93:/home/nfs_export
>> [   0.7] Opening the overlay
>> [   6.1] Inspecting the overlay
>> [  13.8] Checking for sufficient free disk space in the guest
>> [  13.8] Estimating space required on target for each disk
>> [  13.8] Converting Red Hat Enterprise Linux Server 7.3 (Maipo) to run on KVM
>> virt-v2v: This guest has virtio drivers installed.
>> [  52.2] Mapping filesystem data to avoid copying unused and blank areas
>> [  52.4] Closing the overlay
>> [  52.7] Checking if the guest needs BIOS or UEFI to boot
>> [  52.7] Assigning disks to buses
>> [  52.7] Copying disk 1/1 to /tmp/v2v.Zzc4KD/c9cfeba7-73f8-428a-aa77-9a2a1acf0063/images/c8eb039e-3007-4e08-9580-c49da8b73d55/f76d16ea-5e66-4987-a496-8f378b127986 (qcow2)
>>      (100.00/100%)
>> [ 152.4] Creating output metadata
>> [ 152.6] Finishing off
>>
>>
>> Result:
>> So this problem is caused by vdsm or ovirt
>>
>> Regards
>> Ming Xie
>>
>> ----- Original Message -----
>> From: "Richard W.M. Jones" <rjones at redhat.com>
>> To: "Matthias Leopold" <matthias.leopold at meduniwien.ac.at>
>> Cc: users at ovirt.org, libguestfs at redhat.com
>> Sent: Wednesday, July 5, 2017 9:15:16 PM
>> Subject: Re: [Libguestfs] virt-v2v import from KVM without storage-pool ?
>>
>> On Wed, Jul 05, 2017 at 11:14:09AM +0200, Matthias Leopold wrote:
>>> hi,
>>>
>>> i'm trying to import a VM in oVirt from a KVM host that doesn't use
>>> storage pools. this fails with the following message in
>>> /var/log/vdsm/vdsm.log:
>>>
>>> 2017-07-05 09:34:20,513+0200 ERROR (jsonrpc/5) [root] Error getting
>>> disk size (v2v:1089)
>>> Traceback (most recent call last):
>>>    File "/usr/lib/python2.7/site-packages/vdsm/v2v.py", line 1078, in
>>> _get_disk_info
>>>      vol = conn.storageVolLookupByPath(disk['alias'])
>>>    File "/usr/lib64/python2.7/site-packages/libvirt.py", line 4770,
>>> in storageVolLookupByPath
>>>      if ret is None:raise libvirtError('virStorageVolLookupByPath()
>>> failed', conn=self)
>>> libvirtError: Storage volume not found: no storage vol with matching path
>>>
>>> the disks in the origin VM are defined as
>>>
>>>      <disk type='file' device='disk'>
>>>        <driver name='qemu' type='raw' cache='writethrough'/>
>>>        <source file='/dev/kvm108/kvm108_img'/>
>>>
>>>      <disk type='file' device='cdrom'>
>>>        <driver name='qemu' type='raw'/>
>>>        <source file='/some/path/CentOS-7-x86_64-Minimal-1611.iso'/>
>>>
>>> is this a virt-v2v or oVirt problem?
>>
>> Well the stack trace is in the oVirt code, so I guess it's an oVirt
>> problem.  Adding ovirt-users mailing list.
>>
>> Rich.
>>
>> -- 
>> Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
>> Read my programming and virtualization blog: http://rwmj.wordpress.com
>> virt-df lists disk usage of guests without needing to install any
>> software inside the virtual machine.  Supports Linux and Windows.
>> http://people.redhat.com/~rjones/virt-df/
>>
>> _______________________________________________
>> Libguestfs mailing list
>> Libguestfs at redhat.com
>> https://www.redhat.com/mailman/listinfo/libguestfs
> 
> 

-- 
Matthias Leopold
IT Systems & Communications
Medizinische Universität Wien
Spitalgasse 23 / BT 88 /Ebene 00
A-1090 Wien
Tel: +43 1 40160-21241
Fax: +43 1 40160-921200