[Gluster-users] Volume with only one node

Pranith Kumar Karampuri pkarampu at redhat.com
Tue Oct 25 08:57:41 UTC 2016

On Tue, Oct 25, 2016 at 2:07 PM, Oleksandr Natalenko <
oleksandr at natalenko.name> wrote:

> Hello.
> 25.10.2016 10:08, Maxence Sartiaux wrote:
>> I need to migrate a old 2 node cluster to a proxmox cluster with a
>> replicated gluster storage between those two (and a third arbitrer
>> node).
>> Id like to create a volume with a single node, migrate the data on
>> this volume from the old server and then reinstall the second server
>> and add the second brick to the volume.
> If you have only 2 nodes in total, you may lower replica to replica 1,
> reinstall another node, re-add bricks to form replica 2 and repeat these
> steps for another node. No downtime and data migration by hands needed.

Just want to let you guys know that Kevin had bad experience doing
add-bricks when VMs are online. We are still not able to recreate this bug.
So I would advise you to do an offline migration for now.

> I found no informations about creating a replicated volume with a
>> single node, is it possible ?
> Yes, with "force" option, if you really need that.
> Also is it possible to add a third arbitrary node to an existing 2
>> replica volume ?
> Yes, starting from v3.8.
> Regards,
>   Oleksandr
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> Gluster-users at gluster.org
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