[PVE-User] qmrestore to external iscsi storage fails

Alain Péan alain.pean at lpp.polytechnique.fr
Mon May 9 09:44:23 CEST 2011


Hi Sascha,

Glad it worked ! I indeed always waited for the restore command to 
comple before closing the shell (through ssh). In those cases I am 
always anxious all things go well and that I can follow what happen...

Alain

Le 07/05/2011 19:10, Sascha Zucca a écrit :
> Hi List, Hi Alain,
>
> can you believe it? I figured it out...
> It all works when i use "screen" for the qmrestore command.
> Seems like even with the "&" at the end of the command, it will stop 
> working when you close the shell. But strange enough this was not at 
> all obvious, as the qmrestore always ran a lot longer than the shell 
> was closed.
> And of course in the test phase i didnt use ssh but typed the command 
> directly into the machine.
>
> Ahhhhhhhhhhhh ! :-)
>
> Thank you very much, for your help anyway.
>
> Now off for a decent beer in the sun...
> This was all too much! :-)
>
> a very happy
> Sascha
>
>
>> Hi Alain,
>> thanks for your reply.
>> I don't use LUN directly too (at least i didn't check that in the 
>> PM-GUI).
>> As i said i have
>> MSA2312i    ISCSI    Yes    Yes    Yes    n/a    n/a    n/a
>> as the iscsi device in the PM-Storage-GUI
>> and there i have two lvm-groups which represent the two HP MSA volumes:
>> vd01_v001    LVM    Yes    Yes    Yes    600.00    936.91    64.04%
>> vg01_v002    LVM    Yes    Yes    Yes    0.00    737.70    0.00%
>>
>>
>> I hope it's not a problem that the name for the LVM in PM i chose is 
>> the same as the name for the volumes in the MSA Management utility:
>>
>> vd01_v001
>>
>> Desperate
>> Sascha
>
>
> Am 06.05.2011 21:26, schrieb Alain Péan:
>> Hi Sascha,
>>
>> I already did such things, and it worked fine for me, even if I don't 
>> remember the exact way I did it. But I wonder if using the logical 
>> volume name is the correct way to do it. If I remember correctly, I 
>> did it with the storage name appearing in the web interface (under 
>> storage). I don't use the LUN directly but a logical volume for each 
>> VM, as stated in the link you give...
>> What name for your iSCSI storage do you have in your web interface ?
>>
>> Hopes that helps...
>>
>> Alain
>>
>> Le 06/05/2011 19:22, Sascha Zucca a écrit :
>>> Hi list,
>>> i'd most desperately would need your help on a very odd issue i have 
>>> here.
>>> I would like to qmrestore a backupfile to an ext. storage.
>>> but no matter what i try, it'll always fail.
>>>
>>> First of all:
>>> I have a MSA2312i  with 12 x 300 GB SAS (full enclosure) configured 
>>> as Raid10.
>>> In the Management Utility of the MSA2312i it is configured as follows:
>>>
>>> *Vdisks*
>>>
>>>    *
>>>       *vd01* (RAID10)
>>>          o
>>>             Volume *vd01_v001* (1005.9GB)
>>>          o
>>>             Volume *vd01_v002* (792.0GB)
>>>
>>>
>>>
>>> Here's what i do next :
>>>
>>> 1. install multipath-tools as described in 
>>> http://pve.proxmox.com/wiki/ISCSI_Multipath
>>>
>>> 2. Configure iscsi storage as described in 
>>> http://pve.proxmox.com/wiki/Storage_Model#LVM_Groups_with_Network_Backing
>>> MSA2312i    ISCSI    Yes    Yes    Yes    n/a    n/a    n/a
>>> vd01_v001    LVM    Yes    Yes    Yes    600.00    936.91    64.04%
>>> vg01_v002    LVM    Yes    Yes    Yes    0.00    737.70    0.00%
>>>
>>> 3. multipath -ll shows
>>> /3600c0ff0001118d861fac34d01000000dm-3 HP      ,MSA2312i
>>> [size=937G][features=0][hwhandler=0]
>>> \_ round-robin 0 [prio=1][active]
>>>  \_ 17:0:0:1 sdh 8:112 [active][ready]
>>> \_ round-robin 0 [prio=1][enabled]
>>>  \_ 14:0:0:1 sdb 8:16  [active][ready]
>>> \_ round-robin 0 [prio=1][enabled]
>>>  \_ 15:0:0:1 sdd 8:48  [active][ready]
>>> \_ round-robin 0 [prio=1][enabled]
>>>  \_ 16:0:0:1 sdf 8:80  [active][ready]
>>> 3600c0ff0001118d86bfac34d01000000dm-4 HP      ,MSA2312i
>>> [size=738G][features=0][hwhandler=0]
>>> \_ round-robin 0 [prio=1][active]
>>>  \_ 17:0:0:2 sdi 8:128 [active][ready]
>>> \_ round-robin 0 [prio=1][enabled]
>>>  \_ 14:0:0:2 sdc 8:32  [active][ready]
>>> \_ round-robin 0 [prio=1][enabled]
>>>  \_ 15:0:0:2 sde 8:64  [active][ready]
>>> \_ round-robin 0 [prio=1][enabled]
>>>  \_ 16:0:0:2 sdg 8:96  [active][ready]/
>>> looks good...
>>>
>>> 4. now i start the command
>>> qmrestore --storage vd01_v001 
>>> vzdump-qemu-101-2011_05_05-20_05_02.tgz 101 &
>>> the dump consists of two vds (200GB and 600GB)
>>>
>>> 5. the first vd is being restored to the external storage, i can see 
>>> it in the PM-storage-gui and through lvdisplay
>>>
>>> 6. after a while i get the message that vd1 has been restored 
>>> allright and restore of vd2 has started
>>> i can then see both vds (PM-storage-gui and through lvdisplay)
>>>
>>> 7. after another while qmrestore stops, the onle message i can find 
>>> ist this in syslog:
>>> vzdump[8439]: ERROR: restore QemuServer backup 
>>> 'vzdump-qemu-101-2011_05_05-20_05_02.tgz' failed - interrupted by signal
>>>
>>> 8. the vd1 has vanished, only (an obviously broken) vd2 can be seen 
>>> (PM-storage-gui and through lvdisplay)
>>>
>>> 9. no VM is shown in the virtual machine part of the PM-GUI
>>>
>>> I tried barely everything to get it working...
>>> In the test phase of this environment it worked absolutely 
>>> flawlessly...
>>> Now that we built everything in place no more...
>>>
>>>
>>> Please also consider that qmrestore --storage local 
>>> vzdump-qemu-101-2011_05_05-20_05_02.tgz 101 &
>>> works like a charm!
>>>
>>>
>>> What do i do that is so wrong???
>>>
>>> Please help me...
>>>
>>>
>>> Thank you very, very much!
>>> Sascha
>>>
>>>
>>>
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>>
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-- 
==========================================================
Alain Péan - LPP/CNRS
Administrateur Système/Réseau
Laboratoire de Physique des Plasmas - UMR 7648
Observatoire de Saint-Maur
4, av de Neptune, Bat. A
94100 Saint-Maur des Fossés
Tel : 01-45-11-42-39 - Fax : 01-48-89-44-33
==========================================================

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