[Gluster-users] Unable to add brick from new fresh installed server into upgraded cluster

[Kaushal M]

JF is correct. You'll need to bump up the operating version
(op-version) to the latest. There have been changes to add-brick and
the following heal, rebalance etc. which require that all servers be
at an operating-version greater than or equal to the operating-version
level introduced in v3.6, 30600.
The upgrade process will not bump up the operating version of the
cluster automatically, because we do not want to break clusters in
between upgrades of two nodes. Once you have upgraded all the nodes in
the cluster, you can use 'gluster volume set all cluster.op-version
30600' to bump it up. This could have been done automatically, but we
don't as automatically doing it could cause older clients to break
because of newer features being enabled.

~kaushal

On Wed, Nov 26, 2014 at 3:00 PM, JF Le Fillâtre
<jean-francois.lefillatre at uni.lu> wrote:
>
> Hello Alastair,
>
> The tip to change the operating version number was given in another mail to the list within the last few hours:
>
> gluster volume set all cluster.op-version 30600
>
> My own /var/lib/glusterd/glusterd.info files, from a freshly installed 3.6.1, contain the following line:
>
> operating-version=30600
>
> But interestingly, the log files on my clients contain lines like:
> 0-vol2-client-0: Using Program GlusterFS 3.3, Num (1298437), Version (330)
>
> Note that I have no idea if changing the op-version will create side-effects that will put your data at risk. Can anyone from Gluster/RedHat provide some insight on this topic?
>
> Thanks,
> JF
>
>
> On 25/11/14 20:48, Alastair Neil wrote:
>> I have a 2 server CentOS 6 replicated cluster which started out as
>> version 3.3 and has been progressively updated  and is now on version
>> 3.6.1.  Yesterday I added a new freshly installed CentOS 6.6 host and
>> wanted to convert to replica 3 on one of my volumes, however I was
>> unable to add the brick as it reported that all the brick hosts had to
>> be at version 03060.   Presumable some minimum compatibility is set on
>> the volume, but I am struggling to find where.  The info file under
>> /va/lib/glusterd/vols/volname has op-version=2, client-op-version=2.
>>
>> Any suggestions?
>>
>>
>> Thanks, Alastair
>>
>>
>>
>>
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