[Gluster-users] Number of Bricks 1 x (2 + 1) = 3 and arbiter disappearing

[Ravishankar N]

On 05/11/2016 02:17 PM, Nicola Petracchi wrote:
> Hello, I have deployed a gluster configuration of this type:
> Number of Bricks: 1 x (2 + 1) = 3
> 2 data + 1 arbiter
>
> After deploy, all machines were reporting the correct volume info informations:
> Volume Name: gvol0
> Type: Replicate
> Status: Started
> Number of Bricks: 1 x (2 + 1) = 3
> Transport-type: tcp
> Bricks:
> Brick1: pc01:/var/lib/gvol0/brick1
> Brick2: pc02:/var/lib/gvol0/brick2
> Brick3: pcgw:/var/lib/gvol0/brickgw (arbiter)
>
> Then, I had to restart gluster service on brick2, after that, only on
> that machine the volume info was:
> Volume Name: gvol0
> Type: Replicate
> Status: Started
> Number of Bricks: 1 x 3 = 3
> Transport-type: tcp
> Bricks:
> Brick1: pc01:/var/lib/gvol0/brick1
> Brick2: pc02:/var/lib/gvol0/brick2
> Brick3: pcgw:/var/lib/gvol0/brickgw
> others nodes were still reporting the original volume info informations.
>
> This thing appears strange to me, since I suppose all the members of a
> cluster should be consistent on output of informations of a "shared"
> resource.
>
> Btw, later on I had to reboot the arbiter server and again, on that server:
> Volume Name: gvol0
> Type: Replicate
> Status: Started
> Number of Bricks: 1 x 3 = 3
> Transport-type: tcp
> Bricks:
> Brick1: pc01:/var/lib/gvol0/brick1
> Brick2: pc02:/var/lib/gvol0/brick2
> Brick3: pcgw:/var/lib/gvol0/brickgw
>
> Only one node, the one never rebooted is stating that brick3 is an
> arbiter, aside this information the arbiter node is working as an
> arbiter since the data folder contains empty files and is updated with
> the others.
>
> Is this a situation to solve? an issue?
What version of gluster are you running? This was bug that got fixed 
(http://review.gluster.org/12479) in 3.7.7. I would advise you to use 
the latest release 3.7.11 if you are trying out arbiter.
Hope this helps,
Ravi
> Considerations are appreciated.
> Regards
> N
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