[Gluster-users] Gluster Server upgrade from 3.5 to 3.8 in online upgrade mode

[Diego Remolina]

Correct, you should stop clients, then servers, make 100% sure all
processes are dead:

Sometimes the brick process dont die, so killall glustefs and kilall glustefsd
will be needed.

Once all gluster services are shut down apply your updates. Then start
glusterd on the servers then run gluster v status to ensure everything
is happy, then start clients.

Read the upgrade guides, I think if you use quotas, you have to do
some specific tasks.

Are you using RHEL official 3.8.x release? If you are not, then
perhaps you want to go straight to 3.10.x because 3.8.x is EOL if you
are using the community releases as 3.12 was recently released. See:

https://www.gluster.org/release-schedule/

HTH,

Diego





On Wed, Sep 13, 2017 at 3:40 PM, Hemant Mamtora <hemantrm at hotmail.com> wrote:
> Thanks for your reply.
>
> So the way I understand is that it can be upgraded but with a downtime,
> which means that there are no clients writing to this gluster volume, as
> the volume is stopped.
>
> But post a upgrade we will still have the data on the gluster volume
> that we had before the upgrade(but with downtime).
>
> - Hemant
>
>
> On 9/13/17 2:33 PM, Diego Remolina wrote:
>> Nope, not gonna work... I could never go even from 3.6. to 3.7 without
>> downtime cause of the settings change, see:
>>
>> http://lists.gluster.org/pipermail/gluster-users.old/2015-September/023470.html
>>
>> Even when changing options in the older 3.6.x I had installed, my new
>> 3.7.x server would not connect, so had to pretty much stop gluster in
>> all servers, update to 3.7.x offline, then start gluster and all
>> servers would see each other just fine.
>>
>> Diego
>>
>> On Tue, Sep 12, 2017 at 6:15 PM, Hemant Mamtora <hemantrm at hotmail.com> wrote:
>>> I was looking to upgrade Gluster server from ver 3.5.X to 3.8.X.
>>>
>>> I have already tried it in offline upgrade mode and that works, I am
>>> interested in knowing if this upgrade of gluster server version can be
>>> in online upgrade mode.
>>>
>>> Many thanks in advance.
>>>
>>> --
>>> - Hemant Mamtora
>>> _______________________________________________
>>> Gluster-users mailing list
>>> Gluster-users at gluster.org
>>> http://lists.gluster.org/mailman/listinfo/gluster-users
>
> --
> - Hemant Mamtora