[pve-devel] qemu-img convert crashes

Tue Apr 16 16:02:42 CEST 2013

I have found a similar error here 

http://www.mail-archive.com/ceph-users@lists.ceph.com/msg00089.html

try to change

-O rbd

by 

-O raw

seem to work here

Maybe something have change inside qemu about format...

convert -t writeback -p -C -f rbd -O raw 'rbd:vmstorssd1/vm-166-disk-1:mon_host=10.255.0.100\:6789\;10.255.0.101\:6789\;10.255.0.102\:6789\;:auth_supported=none' 'rbd:vmstorssd1/vm-169-disk-1:mon_host=10.255.0.100\:6789\;10.255.0.101\:6789\;10.255.0.102\:6789\;:auth_supported=none''

----- Mail original ----- 

De: "Alexandre DERUMIER" <aderumier at odiso.com> 
À: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
Cc: pve-devel at pve.proxmox.com, "Dietmar Maurer" <dietmar at proxmox.com> 
Envoyé: Mardi 16 Avril 2013 15:44:11 
Objet: Re: [pve-devel] qemu-img convert crashes 

I had just tested, 

Indeed I got also a segfault.... 

seem to be a regression .... 

/usr/bin/qemu-img convert -t writeback -p -C -f qcow2 -O rbd /var/lib/vz/images/115/vm-115-disk-1.qcow2 'rbd:rbd/vm-249-disk-1:mon_host=10.6.0.100\:6789\;10.6.0.101\:6789\;10.6.0.102\:6789:auth_supported=none' 
Segmentation fault 

maybe qemu-devel or ceph-devel can help us to debug that? 

----- Mail original ----- 

De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com, "Dietmar Maurer" <dietmar at proxmox.com> 
Envoyé: Mardi 16 Avril 2013 15:32:00 
Objet: Re: [pve-devel] qemu-img convert crashes 

Am 16.04.2013 15:22, schrieb Alexandre DERUMIER: 
>>> Also a segfault. 
> 
> Do you have tried with another rbd source volume ? Do you use stable ceph bobtail ? 

Both yes always the same result... wouldn't it make sense to use rbd cp 
instead? 

> 
> ----- Mail original ----- 
> 
> De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
> À: "Alexandre DERUMIER" <aderumier at odiso.com> 
> Cc: pve-devel at pve.proxmox.com, "Dietmar Maurer" <dietmar at proxmox.com> 
> Envoyé: Mardi 16 Avril 2013 14:51:19 
> Objet: Re: [pve-devel] qemu-img convert crashes 
> 
> Am 16.04.2013 14:42, schrieb Alexandre DERUMIER: 
>> oh, I never try to clone(copy) between 2 rbd storage, only from local to rbd , or rbd to local. 
>> 
>> maybe can you try without '-t writeback ?' 
> Same. 
> 
>> Does it work if you try to copy from rbd to local by example ? 
> Also a segfault. 
> 
> I'm using: pve-qemu-kvm 1.4-6 
> 
> Stefan 
> 
> 
>> ----- Mail original ----- 
>> 
>> De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
>> À: "Alexandre DERUMIER" <aderumier at odiso.com> 
>> Cc: pve-devel at pve.proxmox.com, "Dietmar Maurer" <dietmar at proxmox.com> 
>> Envoyé: Mardi 16 Avril 2013 14:36:50 
>> Objet: Re: [pve-devel] qemu-img convert crashes 
>> 
>> HI, 
>> 
>> here is the crash when trying to clone: 
>> 
>> activate volume source vmstorssd1:vm-166-disk-1 
>> create target volume 
>> activate volume vmstorssd1:vm-169-disk-1 
>> copy vmstorssd1:vm-166-disk-1 to vmstorssd1:vm-169-disk-1 
>> (0.00/100%) 
>> TASK ERROR: create failed - copy failed: command '/usr/bin/qemu-img 
>> convert -t writeback -p -C -f rbd -O rbd 
>> 'rbd:vmstorssd1/vm-166-disk-1:mon_host=10.255.0.100\:6789\;10.255.0.101\:6789\;10.255.0.102\:6789\;:auth_supported=none' 
>> 'rbd:vmstorssd1/vm-169-disk-1:mon_host=10.255.0.100\:6789\;10.255.0.101\:6789\;10.255.0.102\:6789\;:auth_supported=none'' 
>> failed: got signal 1 
>> 
>> Stefan 
>> 
>> Am 16.04.2013 13:17, schrieb Stefan Priebe - Profihost AG: 
>>> Hi, 
>>> 
>>> will recheck that. 
>>> 
>>> Right now i want to create a template. But nothing happens.If i convert 
>>> a Machine into a template i just see a task qmtemplate => OK. That's 
>>> all. But the VM stays the same and i can still start / stop that one. 
>>> 
>>> Greets, 
>>> Stefan 
>>> 
>>> Am 16.04.2013 12:28, schrieb Alexandre DERUMIER: 
>>>>>> Then i'll wait until these patches get integrated. Right now qemu-img 
>>>>>> segfaults with rbd for me when trying to clone. 
>>>> 
>>>> Could you describe the problem ? I have tested it last month and it was working fine. 
>>>> 
>>>> (Just to be sure, you don't try to use qemu-img on a running vm, because it don't work) 
>>>> 
>>>> ----- Mail original ----- 
>>>> 
>>>> De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
>>>> À: "Dietmar Maurer" <dietmar at proxmox.com> 
>>>> Cc: pve-devel at pve.proxmox.com 
>>>> Envoyé: Mardi 16 Avril 2013 11:04:39 
>>>> Objet: Re: [pve-devel] Feature HW Profiles 
>>>> 
>>>> Hi, 
>>>> Am 16.04.2013 10:58, schrieb Dietmar Maurer: 
>>>>>>> VM templates will provide a way to do that (patches from Alexandre). 
>>>>>> 
>>>>>> Yes and no as the disk will be also cloned. I'm just speaking about the settings 
>>>>>> like in OpenStack, OpenNebula and others. 
>>>>> 
>>>>> We can also allow to create templates without any disks. You can then add the disks when you clone. 
>>>> 
>>>> oh OK sorry. 
>>>> 
>>>> Then i'll wait until these patches get integrated. Right now qemu-img 
>>>> segfaults with rbd for me when trying to clone. 
>>>> 
>>>> Thanks! 
>>>> 
>>>> Greets Stefan 
>>>> 
>>>> 
>>>> _______________________________________________ 
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>>>> 