Re: Volume with only one node

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Thank you everyone !

On Tue, 2016-10-25 at 14:27 +0530, Pranith Kumar Karampuri wrote:


On Tue, Oct 25, 2016 at 2:07 PM, Oleksandr Natalenko <oleksandr@xxxxxxxxxxxxxx> 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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