[Gluster-users] Problem with Gluster 3.12.4, VM and sharding

[Krutika Dhananjay]

Please share the volume-info output and the logs under /var/log/glusterfs/
from all your nodes. for investigating the issue.

-Krutika

On Tue, Jan 16, 2018 at 1:30 PM, Ing. Luca Lazzeroni - Trend Servizi Srl <
luca at gvnet.it> wrote:

> Hi to everyone.
>
> I've got a strange problem with a gluster setup: 3 nodes with Centos 7.4,
> Gluster 3.12.4 from Centos/Gluster repositories, QEMU-KVM version 2.9.0
> (compiled from RHEL sources).
>
> I'm running volumes in replica 3 arbiter 1 mode (but I've got a volume in
> "pure" replica 3 mode too). I've applied the "virt" group settings to my
> volumes since they host VM images.
>
> If I try to install something (eg: Ubuntu Server 16.04.3) on a VM (and so
> I generate a bit of I/O inside it) and configure KVM to access gluster
> volume directly (via libvirt), install fails after a while because the disk
> content is corrupted. If I inspect the block inside the disk (by accessing
> the image directly from outside) I can found many files filled with "^@".
>
> If, instead, I configure KVM to access VM images via a FUSE mount,
> everything seems to work correctly.
>
> Note that the problem with install is verified 100% time with QCOW2 image,
> while it appears only after with RAW disk images.
>
> Is there anyone who experienced the same problem ?
>
> Thank you,
>
>
> --
> Ing. Luca Lazzeroni
> Responsabile Ricerca e Sviluppo
> Trend Servizi Srl
> Tel: 0376/631761
> Web: https://www.trendservizi.it
>
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>
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