Update 0.80.7 to 0.80.8 -- Restart Order

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Hello!

We are planning to upgrade our Ubuntu 14.04.1 based cluster from Ceph Firefly 0.80.7 to 0.80.8. We have 4 nodes, 12x4TB spinners each (plus OS disks). Apart from the 12 OSDs per node, nodes 1-3 have MONs running.

The instructions on ceph.com say it is best to first restart the MONs, then the OSDs. We are wondering, if updating the packages from the repository will trigger daemon reloads through package scripts. This would then certainly not guarantee the restart order recommended.

Do these instructions assume that the monitors are separate machines that could be updated first? If so, are there best-practice recommendations on how to update a production cluster without service interruption?

Thanks a lot for any advice!

Daniel


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