[Gluster-users] Replica 3 - how to replace failed node (peer)

Karthik Subrahmanya
Thu, 11 Apr 2019 04:55:37 -0000

On Thu, Apr 11, 2019 at 10:23 AM Karthik Subrahmanya <ksubrahm at
redhat.com>
wrote:

> 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?
>
- if you remember the commands/steps that you followed, please give that as
well.

> - what problem(s) did you face?
>

> Regards,
> Karthik
>
> On Thu, Apr 11, 2019 at 10:14 AM Strahil <hunter86_bg at yahoo.com>
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 Nikolov
>> On Apr 11, 2019 07:34, Karthik Subrahmanya <ksubrahm at
redhat.com> 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.
>>
>> [1]
>>
https://docs.gluster.org/en/latest/release-notes/3.9.0/#introducing-reset-brick-command
>>
>> Regards,
>> Karthik
>>
>> On Wed, Apr 10, 2019 at 10:31 PM Strahil <hunter86_bg at
yahoo.com> 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 at
gmail.com>
>> 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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