On Tue, Dec 19, 2017 at 1:10 AM, Ziemowit Pierzycki <ziemowit@xxxxxxxxxxxxx> wrote:
Hi,
I have a cluster of 10 servers all running Fedora 24 along with
Gluster 3.8. I'm planning on doing rolling upgrades to Fedora 27 with
Gluster 3.12. I saw the documentation and did some testing but I
would like to run my plan through some (more?) educated minds.
The current setup is:
Volume Name: vol0
Distributed-Replicate
Number of Bricks: 2 x (2 + 1) = 6
Bricks:
Brick1: glt01:/vol/vol0
Brick2: glt02:/vol/vol0
Brick3: glt05:/vol/vol0 (arbiter)
Brick4: glt03:/vol/vol0
Brick5: glt04:/vol/vol0
Brick6: glt06:/vol/vol0 (arbiter)
Volume Name: vol1
Distributed-Replicate
Number of Bricks: 2 x (2 + 1) = 6
Bricks:
Brick1: glt07:/vol/vol1
Brick2: glt08:/vol/vol1
Brick3: glt05:/vol/vol1 (arbiter)
Brick4: glt09:/vol/vol1
Brick5: glt10:/vol/vol1
Brick6: glt06:/vol/vol1 (arbiter)
After performing the upgrade because of differences in checksums, the
upgraded nodes will become:
State: Peer Rejected (Connected)
Have you upgraded all the nodes? If yes, have you bumped up the cluster.op-version after upgrading all the nodes? Please follow : http://docs.gluster.org/en/latest/Upgrade-Guide/op_version/ for more details on how to bump up the cluster.op-version. In case you have done all of these and you're seeing a checksum issue then I'm afraid you have hit a bug. I'd need further details like the checksum mismatch error from glusterd.log file along with the the exact volume's info file from /var/lib/glusterd/vols/<volname>/info between both the peers to debug this further.
If I start doing the upgrades one at a time, with nodes glt10 to glt01
except for the arbiters glt05 and glt06, and then upgrading the
arbiters last, everything should remain online at all times through
the process. Correct?
Thanks.
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