[Gluster-users] Rebalance + VM corruption - current status and request for feedback

[Krutika Dhananjay]

Could you provide the rebalance and mount logs?

-Krutika

On Fri, May 26, 2017 at 3:17 PM, Mahdi Adnan <mahdi.adnan at outlook.com>
wrote:

> Good morning,
>
>
> So i have tested the new Gluster 3.10.2, and after starting rebalance two
> VMs were paused due to storage error and third one was not responding.
>
> After rebalance completed i started the VMs and it did not boot, and throw
> an XFS wrong inode error into the screen.
>
>
> My setup:
>
> 4 nodes running CentOS7.3 with Gluster 3.10.2
>
> 4 bricks in distributed replica with group set to virt.
>
> I added the volume to ovirt and created three VMs, i ran a loop to create
> 5GB file inside the VMs.
>
> Added new 4 bricks to the existing nodes.
>
> Started rebalane "with force to bypass the warning message"
>
> VMs started to fail after rebalancing.
>
>
>
>
> --
>
> Respectfully
> *Mahdi A. Mahdi*
>
> ------------------------------
> *From:* Krutika Dhananjay <kdhananj at redhat.com>
> *Sent:* Wednesday, May 17, 2017 6:59:20 AM
> *To:* gluster-user
> *Cc:* Gandalf Corvotempesta; Lindsay Mathieson; Kevin Lemonnier; Mahdi
> Adnan
> *Subject:* Rebalance + VM corruption - current status and request for
> feedback
>
> Hi,
>
> In the past couple of weeks, we've sent the following fixes concerning VM
> corruption upon doing rebalance - https://review.gluster.org/#/
> q/status:merged+project:glusterfs+branch:master+topic:bug-1440051
>
> These fixes are very much part of the latest 3.10.2 release.
>
> Satheesaran within Red Hat also verified that they work and he's not
> seeing corruption issues anymore.
>
> I'd like to hear feedback from the users themselves on these fixes (on
> your test environments to begin with) before even changing the status of
> the bug to CLOSED.
>
> Although 3.10.2 has a patch that prevents rebalance sub-commands from
> being executed on sharded volumes, you can override the check by using the
> 'force' option.
>
> For example,
>
> # gluster volume rebalance myvol start force
>
> Very much looking forward to hearing from you all.
>
> Thanks,
> Krutika
>
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