Re: Replace brick 3.4.2 with 3.6.2?

[aytac zeren <aytaczeren@xxxxxxxxx>]

Hi John,

3.6.2 is a major release and introduces some new features in cluster wide concept. Additionally it is not stable yet. The best way of doing it would be establishing another 3.6.2 cluster, accessing 3.4.0 cluster via nfs or native client, and copying content to 3.6.2 cluster gradually. While your volume size decreases on 3.4.0 cluster, you can unmount 3.4.0 members from cluster, upgrade them and add 3.6.2 trusted pool with brick. Please be careful while doing this operation, as number of nodes in your cluster should be reliable with your cluster design. (Stripped, Replicated, Distributed or a combination of them).

Notice: I don't take any responsibility on the actions you have undertaken with regards to my recommendations, as my recommendations are general and does not take your archtiectural design into consideration.

BR

Aytac

On Tue, Feb 24, 2015 at 11:19 PM, John Gardeniers <jgardeniers@xxxxxxxxxxxxxxxxx> wrote:

Hi All,

We have a gluster volume consisting of a single brick, using replica 2. Both nodes are currently running gluster 3.4.2 and I wish to replace one of the nodes with a new server (rigel), which has gluster 3.6.2

Following this link:

https://access.redhat.com/documentation/en-US/Red_Hat_Storage/2.1/html/Administration_Guide/Replacing_an_Old_Brick_with_a_New_Brick_on_a_Replicate_or_Distribute-replicate_Volume.html

I tried to do a replace brick but got "volume replace-brick: failed: Host rigel is not in 'Peer in Cluster' state". Is this due to a version incompatibility or is it due to some other issue? A bit of googling reveals the error message in bug reports but I've not yet found anything that applies to this specific case.

Incidentally, the clients (RHEV bare metal hypervisors, so we have no upgrade option) are running 3.4.0. Will this be a problem if the nodes are on 3.6.2?

regards,
John

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