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From Natalia Costas Lago <nata...@cesga.es>
Subject Re: Problem downloading volume with gluster as primary storage
Date Thu, 10 Nov 2016 13:19:43 GMT
Dear all,

It seems... that we have found the issue..

Our setup is  gluster 3.8 + cloudstack 4.9 + centos7 with kernel 
upgraded to 4.8 (we upgraded the kernel as we saw improvements in 
network performance in other scenarios)

It seems the new Linux kernel 4.8 breaks Qemu reading from gluster 
volumes. Back to 3.10 everything seems to be back to normal.

Anyone has deployed over Ubuntu16 + gluster as primary storage? Ubuntu 
16 comes with the newer kernel by default.

Thanx,


El 05/11/2016 a las 23:22, Natalia Costas Lago escribió:
> Dear all,
>
> We have deployed a new cloudstack platform based on 4.9 version. Our primary storage
is based on glusterFS. Everything seemed ok (imported a centos7 template from our old Cloudstack
deployment and deployed VMs).
> However we are having trouble downloading templates (this implies migrating qcow images
from primary to secondary storage).
>
> The error we get is:
>
> Nov  5 00:01:22 c11-2 sh: ERROR [kvm.storage.LibvirtStorageAdaptor] (agentRequest-Handler-5:)
(logid:c1f9652d) Failed to convert /mnt/c69fb76e-f2f9-359e-bda0-1259786717af/b51aea8e-d60d-4bff-8e8d-3429a98df2ba
to /mnt/38f76a26-3a3b-380f-aa69-38bcef0550a6/0e3a90fb-57b7-4c09-9ef9-5d5c90fb438f.qcow2 the
error was: qemu-img: block/raw-posix.c:1353: find_allocation: Assertion `offs >= start'
failed.
>
> It seems is due to qemu-img dealing with qcow images from the gluster volume.
>
> Any hint about this? Anyone has analogue deployment?
>
> Thanking you in advance,
>
> Kind regards,

-- 
====================================================
Natalia Costas Lago
Senior Communications Technician
Galicia Supercomputing Centre (CESGA)
(CESGA on Twitter  |  CESGA on Facebook)

Avenida de Vigo, s/n (Campus Vida)
15705 Santiago de Compostela - SPAIN

E-mail: natalia@cesga.es
Cell: +34 981 56 98 10 (ext. 237)
Fax: +34 981 59 46 16
Web: https://www.cesga.es/
====================================================
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