On Thu, Apr 11, 2019 at 1:40 PM Strahil Nikolov <hunter86_bg@xxxxxxxxx> wrote:
Hi Karthik,- the volume configuration you were using?I used oVirt 4.2.6 Gluster Wizard, so I guess - we need to involve the oVirt devs here.- why you wanted to replace your brick?I have deployed the arbiter on another location as I thought I can deploy the Thin Arbiter (still waiting the docs to be updated), but once I realized that GlusterD doesn't support Thin Arbiter, I had to build another machine for a local arbiter - thus a replacement was needed.
We are working on supporting Thin-arbiter with GlusterD. Once done, we will update on the users list so that you can play with it and let us know your experience.
- which brick(s) you tried replacing?I was replacing the old arbiter with a new one- what problem(s) did you face?All oVirt VMs got paused due to I/O errors.
There could be many reasons for this. Without knowing the exact state of the system at that time, I am afraid to make any comment on this.
At the end, I have rebuild the whole setup and I never tried to replace the brick this way (used only reset-brick which didn't cause any issues).As I mentioned that was on v3.12, which is not the default for oVirt 4.3.x - so my guess is that it is OK now (current is v5.5).
I don't remember anyone complaining about this recently. This should work in the latest releases.
Just sharing my experience.
Highly appreciated.
Regards,
Karthik
Best Regards,Strahil NikolovВ четвъртък, 11 април 2019 г., 0:53:52 ч. Гринуич-4, Karthik Subrahmanya <ksubrahm@xxxxxxxxxx> написа:Hi Strahil,Can you give us some more insights on- the volume configuration you were using?- why you wanted to replace your brick?- which brick(s) you tried replacing?- what problem(s) did you face?Regards,KarthikOn Thu, Apr 11, 2019 at 10:14 AM Strahil <hunter86_bg@xxxxxxxxx> wrote:Hi Karthnik,
I used only once the brick replace function when I wanted to change my Arbiter (v3.12.15 in oVirt 4.2.7) and it was a complete disaster.
Most probably I should have stopped the source arbiter before doing that, but the docs didn't mention it.Thus I always use reset-brick, as it never let me down.
Best Regards,
Strahil NikolovOn Apr 11, 2019 07:34, Karthik Subrahmanya <ksubrahm@xxxxxxxxxx> wrote:Hi Strahil,Thank you for sharing your experience with reset-brick option.Since he is using the gluster version 3.7.6, we do not have the reset-brick [1] option implemented there. It is introduced in 3.9.0. He has to go with replace-brick with the force option if he wants to use the same path & name for the new brick.Yes, it is recommended to have the new brick to be of the same size as that of the other bricks.Regards,KarthikOn Wed, Apr 10, 2019 at 10:31 PM Strahil <hunter86_bg@xxxxxxxxx> wrote:I have used reset-brick - but I have just changed the brick layout.
You may give it a try, but I guess you need your new brick to have same amount of space (or more).
Maybe someone more experienced should share a more sound solution.
Best Regards,
Strahil NikolovOn Apr 10, 2019 12:42, Martin Toth <snowmailer@xxxxxxxxx> wrote:
>
> Hi all,
>
> I am running replica 3 gluster with 3 bricks. One of my servers failed - all disks are showing errors and raid is in fault state.
>
> Type: Replicate
> Volume ID: 41d5c283-3a74-4af8-a55d-924447bfa59a
> Status: Started
> Number of Bricks: 1 x 3 = 3
> Transport-type: tcp
> Bricks:
> Brick1: node1.san:/tank/gluster/gv0imagestore/brick1
> Brick2: node2.san:/tank/gluster/gv0imagestore/brick1 <— this brick is down
> Brick3: node3.san:/tank/gluster/gv0imagestore/brick1
>
> So one of my bricks is totally failed (node2). It went down and all data are lost (failed raid on node2). Now I am running only two bricks on 2 servers out from 3.
> This is really critical problem for us, we can lost all data. I want to add new disks to node2, create new raid array on them and try to replace failed brick on this node.
>
> What is the procedure of replacing Brick2 on node2, can someone advice? I can’t find anything relevant in documentation.
>
> Thanks in advance,
> Martin
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