Shahar,

I took the liberty to try to patch our test setup with the fix I took from 
https://gerrit.ovirt.org/#/c/64272/4/ (lib/vdsm/v2v.py)
I restarted vdsm afterwards

Result :
In the GUI import page, now when clicking on "load" button (just before 
guetting the list of vm to import on source), an error occurs : "Failed to 
communicate with the external provider, see log for additional details."

Error on engine log :

"
2016-09-29 14:13:48,637 ERROR 
[org.ovirt.engine.core.vdsbroker.vdsbroker.GetVmsFromExternalProviderVDSCommand]
 (default task-30) [] Failed in 'GetVmsFromExternalProviderVDS' method, for 
vds: 'virtintelan01.lbg.office.lyra'; host: 'virtintelan01.lbg.office.lyra': 
null
2016-09-29 14:13:48,637 ERROR 
[org.ovirt.engine.core.vdsbroker.vdsbroker.GetVmsFromExternalProviderVDSCommand]
 (default task-30) [] Command 'GetVmsFromExternalProviderVDSCommand(HostName = 
virtintelan01.lbg.office.lyra, 
GetVmsFromExternalProviderParameters:{runAsync='true', 
hostId='20b59a24-0098-461a-b4a3-7d6213b96c52', 
url='qemu+ssh://root@192.168.210.140/system', username='null', 
originType='KVM'})' execution failed: null
2016-09-29 14:13:48,637 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.GetVmsFromExternalProviderVDSCommand]
 (default task-30) [] FINISH, GetVmsFromExternalProviderVDSCommand, log id: 
6e062276
2016-09-29 14:13:48,637 ERROR 
[org.ovirt.engine.core.bll.GetVmsFromExternalProviderQuery] (default task-30) 
[] Query 'GetVmsFromExternalProviderQuery' failed: EngineException: 
java.lang.NumberFormatException: null (Failed with error ENGINE and code 5001)
2016-09-29 14:13:48,637 ERROR 
[org.ovirt.engine.core.bll.GetVmsFromExternalProviderQuery] (default task-30) 
[] Exception: org.ovirt.engine.core.common.errors.EngineException: 
EngineException: java.lang.NumberFormatException: null (Failed with error 
ENGINE and code 5001)
        at 
org.ovirt.engine.core.bll.VdsHandler.handleVdsResult(VdsHandler.java:114) 
[bll.jar:]
        at 
org.ovirt.engine.core.bll.VDSBrokerFrontendImpl.runVdsCommand(VDSBrokerFrontendImpl.java:33)
 [bll.jar:]
        at 
org.ovirt.engine.core.bll.QueriesCommandBase.runVdsCommand(QueriesCommandBase.java:257)
 [bll.jar:]
        ...
"

In the host, I can see the following errors on /var/log/messages : 

"
Sep 29 14:11:39 virtintelan01 journal: vdsm root ERROR Error getting disk 
size#012Traceback (most recent call last):#012  File 
"/usr/lib/python2.7/site-packages/vdsm/v2v.py", line 931, in _add_disk_info#012 
   vol = conn.storageVolLookupByPath(disk['alias'])#012  File 
"/usr/lib64/python2.7/site-packages/libvirt.py", line 4596, in 
storageVolLookupByPath#012    if ret is None:raise 
libvirtError('virStorageVolLookupByPath() failed', conn=self)#012libvirtError: 
Volume de stockage introuvable : no storage vol with matching path 
'/dev/mapper/vg_00-lv_sys'
Sep 29 14:11:39 virtintelan01 journal: vdsm root ERROR Error getting disk 
size#012Traceback (most recent call last):#012  File 
"/usr/lib/python2.7/site-packages/vdsm/v2v.py", line 931, in _add_disk_info#012 
   vol = conn.storageVolLookupByPath(disk['alias'])#012  File 
"/usr/lib64/python2.7/site-packages/libvirt.py", line 4596, in 
storageVolLookupByPath#012    if ret is None:raise 
libvirtError('virStorageVolLookupByPath() failed', conn=self)#012libvirtError: 
Volume de stockage introuvable : no storage vol with matching path '/dev/sdc'
"

FYI "Volume de stockage introuvable" (french) = "storage volume not found" 

This error did not appear before patching with the fix.

I repeated the operation 2 times with a clean setup + patch. Same behaviour. 
Maybe I'm doing something wrong?

my setup :
ovirt-engine : centos 7.2 + ovirt 4.0.4
hosts : centos 7.2 + ovirt 4.0.4 + fix

cordialement, regards, 
Nelson LAMEIRAS 

Lyra Network 
Service Projets et Processus 
Tel : +33 (0) 5 32 09 09 70 
109 rue de l’innovation 
31670 Labège - France 
www.lyra-network.com

----- Original Message -----
From: "Nelson Lameiras" <nelson.lamei...@lyra-network.com>
To: "Shahar Havivi" <shav...@redhat.com>
Cc: users@ovirt.org
Sent: Friday, September 23, 2016 11:55:08 AM
Subject: Re: [ovirt-users] can't import vm from KVM host

Shahar,

Thanks!
I'll keep an eye on this bug and try to be helpfull when testing the fix.

nelson

----- Original Message -----
From: "Shahar Havivi" <shav...@redhat.com>
To: "Nelson Lameiras" <nelson.lamei...@lyra-network.com>
Cc: "Nisim Simsolo" <nsims...@redhat.com>, users@ovirt.org
Sent: Thursday, September 22, 2016 10:14:33 AM
Subject: Re: [ovirt-users] can't import vm from KVM host

Nelson,
I opened a bug regarding your issue
https://bugzilla.redhat.com/show_bug.cgi?id=1378340

And send a fix:
https://gerrit.ovirt.org/#/c/64272/

Thank you for your help!

 Shahar.

On 21.09.16 10:57, Shahar Havivi wrote:
> On 20.09.16 10:24, Nelson Lameiras wrote:
> > Here is the disk section of my vm,
> > 
> > ...
> >     <disk type='block' device='disk'>
> >       <driver name='qemu' type='raw' cache='none' io='native'/>
> >       <source dev='/dev/mapper/vg_01-lv_sys'/>
> >       <target dev='vda' bus='virtio'/>
> >       <address type='pci' domain='0x0000' bus='0x00' slot='0x07' 
> > function='0x0'/>
> >     </disk>
> >     <disk type='block' device='disk'>
> >       <driver name='qemu' type='raw' cache='none' io='native'/>
> >       <source dev='/dev/sdc'/>
> >       <target dev='vdb' bus='virtio'/>
> >       <address type='pci' domain='0x0000' bus='0x00' slot='0x08' 
> > function='0x0'/>
> >     </disk>
> > ...
> > 
> > nelson
> Thanks Nelson,
> bz 1362525 will not solve your issue.
> We will start work on that block device issue shortly and I hope that it will
> make it to the next release.
> 
> Thank you,
>  Shahar.
> 
> > 
> > 
> > ----- Original Message -----
> > From: "Shahar Havivi" <shav...@redhat.com>
> > To: "Nelson Lameiras" <nelson.lamei...@lyra-network.com>
> > Cc: "Nisim Simsolo" <nsims...@redhat.com>, users@ovirt.org
> > Sent: Tuesday, September 20, 2016 8:04:41 AM
> > Subject: Re: [ovirt-users] can't import vm from KVM host
> > 
> > On 19.09.16 18:11, Nelson Lameiras wrote:
> > > Well I think I have a rather "classical" environment :
> > > 
> > > This is the test setup I created (from scratch) in order to simulate 
> > > future migrations (which will be used to migrate our hundreds of vm in 
> > > production)
> > > 
> > > On one side, I have a x86_64 centos7.2+KVM hosting one VM with 2 iscsi 
> > > disks : 
> > >   1 LVM block device /dev/mapper/vg_01-lv_sys, using virtio
> > >   1 block device /dev/sdc, using virtio
> > > 
> > > on the other side, I have a x86_64 centos 7.2 oVirt cluster (2 hosts, 
> > > same hardware as KVM hosts) installed with 4.0.3 oVirt (hosts and engine) 
> > > fully upgraded to 4.0.4RC1 (hosts and engine)
> > > Target would be oVirt iscsi Data Domain disk (which is irrelevant because 
> > > the problem I'm describing arises before selecting oVirt target)
> > > 
> > > I'm using the GUI to test the native import capabilities of oVirt "Import 
> > > VM"
> > > When selecting KVM import, putting correct URL data (using either tcp or 
> > > ssh transport), I get a list of VM machines running in the KVM cluster 
> > > (for this exemple, only the one VM described above), but the disk count 
> > > is always 0. Which makes it impossible to import the VM.
> > > 
> > > I should add that I made the same VM import using "local hard drives" 
> > > (ie. local raw file) and it works as expected, I can see one or multiple 
> > > disks and import them easily to oVirt. The problem seems to manifest 
> > > itself only when importing disks using block devices directly.
> > > 
> > > Do you need more information from me, or make more tests?
> > > 
> > > thanks a lot,
> > > nelson
> > Can you post the libvirt xml as attachment here (at least the disks 
> > sections):
> > 
> > $ virsh -r dumpxml <vmname>
> > 
> >  Shahar.
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