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

[JF Le Fillâtre]

Ah great, thank you Kaushal for the explanation! Duly noted. :)


On 26/11/14 10:53, Kaushal M wrote:
> 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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 Jean-François Le Fillâtre
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 LSCB - University of Luxembourg
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