[Gluster-users] Volume creation fails with "prefix of it is already part of a volume"

[Daniel Müller]

In this case I did not have any other brick running. It was my first try.
Just a fresh install and then set up my 
first replicating vol with 3.4:
On node1  /raid5hs/glusterfs/export
On node2 /raid5hs/glusterfs/export
Just did on the first node: gluster volume create sambacluster replica 2
transport tcp  s4master:/raid5hs/glusterfs/export
s4slave:/raid5hs/glusterfs/export

And voila the error occurred!!
I think this is something more serious in 3.4. I did not had that with
3.2!!!!!!!!!!

One behaviuor I recognized with this error: Only on one node the .glusterfs
file was written in /raid5hs/glusterfs/export on the other node the file was
missing !!!!!!!!!!!!!!
This responds to the /etc/glusterfs/glusterd.vol file that was missing later
on on starting the brick!
I had to copy it over from the other node  to start it successfully.


EDV Daniel Müller

Leitung EDV
Tropenklinik Paul-Lechler-Krankenhaus
Paul-Lechler-Str. 24
72076 Tübingen 
Tel.: 07071/206-463, Fax: 07071/206-499
eMail: mueller at tropenklinik.de
Internet: www.tropenklinik.de 

Von: Anand Avati [mailto:anand.avati at gmail.com] 
Gesendet: Donnerstag, 22. August 2013 08:23
An: Stroppa Daniele (strp)
Cc: mueller at tropenklinik.de; gluster-users at gluster.org
Betreff: Re: [Gluster-users] Volume creation fails with "prefix of it is
already part of a volume"

This is intentional behavior. We specifically brought this because creating
volumes with directories which are subdirectories of other bricks, or if a
subdirectory belongs to another brick can result in dangerous corruption of
your data.

Please create volumes with brick directories which are cleanly separate in
the namespace.

Avati

On Wed, Aug 21, 2013 at 7:51 AM, Stroppa Daniele (strp) <strp at zhaw.ch>
wrote:
Thanks Daniel.

I'm indeed running Gluster 3.4 on CentOS 6.4.

I've tried your suggestion, it does work for me too, but it's not an
optimal solution.

Maybe someone could shed some light on this behaviour?

Thanks,
--
Daniele Stroppa
Researcher
Institute of Information Technology
Zürich University of Applied Sciences
http://www.cloudcomp.ch <http://www.cloudcomp.ch/>







On 21/08/2013 09:00, "Daniel Müller" <mueller at tropenklinik.de> wrote:

>Are you running with gluster 3.4?
>I had the same issue. I solved it by deleting my subfolders again and then
>create new ones. In your case brick1 and brick2.
>Then create new subfolders in the place,ex.: mkdir /mnt/bricknew1  and
>/mnt/bricknew2 .
>This solved the problem for me, not knowing why gluster 3.4 behave like
>this.
>Good Luck
>
>
>EDV Daniel Müller
>
>Leitung EDV
>Tropenklinik Paul-Lechler-Krankenhaus
>Paul-Lechler-Str. 24
>72076 Tübingen
>Tel.: 07071/206-463, Fax: 07071/206-499
>eMail: mueller at tropenklinik.de
>Internet: www.tropenklinik.de
>
>Von: gluster-users-bounces at gluster.org
>[mailto:gluster-users-bounces at gluster.org] Im Auftrag von Stroppa Daniele
>(strp)
>Gesendet: Dienstag, 20. August 2013 21:51
>An: gluster-users at gluster.org
>Betreff: [Gluster-users] Volume creation fails with "prefix of it is
>already
>part of a volume"
>
>Hi All,
>
>I'm setting up a small test cluster: 2 nodes (gluster-node1 and
>gluster-node4) with 2 bricks each (/mnt/brick1 and /mnt/brick2) and one
>volume (vol_icclab). When I issue the create volume command I get the
>following error:
>
># gluster volume create vol_icclab replica 2 transport tcp
>gluster-node4.test:/mnt/brick1/vol_icclab
>gluster-node1.test:/mnt/brick1/vol_icclab
>gluster-node4.test:/mnt/brick2/vol_icclab
>gluster-node1.test:/mnt/brick2/vol_icclab
>volume create: vol_icclab: failed: /mnt/brick1/vol_icclab or a prefix of
>it
>is already part of a volume
>
>I checked and found this [1], but in my case the issue it's happening when
>creating the volume for the first time, not after removing/adding a brick
>to
>a volume.
>
>Any suggestions?
>
>[1]
>http://joejulian.name/blog/glusterfs-path-or-a-prefix-of-it-is-already-p
>art-of-a-volume/
>
>Thanks,
>--
>Daniele Stroppa
>Researcher
>Institute of Information Technology
>Zürich University of Applied Sciences
>http://www.cloudcomp.ch
>
>

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