[ceph-users] Running Jewel and Luminous mixed for a longer period

Graham Allan gta at umn.edu
Tue Dec 5 09:10:32 PST 2017

On 12/05/2017 07:20 AM, Wido den Hollander wrote:
> Hi,
> I haven't tried this before but I expect it to work, but I wanted to
> check before proceeding.
> I have a Ceph cluster which is running with manually formatted
> FileStore XFS disks, Jewel, sysvinit and Ubuntu 14.04.
> I would like to upgrade this system to Luminous, but since I have to
> re-install all servers and re-format all disks I'd like to move it to
> BlueStore at the same time.

You don't *have* to update the OS in order to update to Luminous, do 
you? Luminous is still supported on Ubuntu 14.04 AFAIK.

Though obviously I understand your desire to upgrade; I only ask because 
I am in the same position (Ubuntu 14.04, xfs, sysvinit), though happily 
with a smaller cluster. Personally I was planning to upgrade ours 
entirely to Luminous while still on Ubuntu 14.04, before later going 
through the same process of decommissioning one machine at a time to 
reinstall with CentOS 7 and Bluestore. I too don't see any reason the 
mixed Jewel/Luminous cluster wouldn't work, but still felt less 
comfortable with extending the upgrade duration.

Graham Allan
Minnesota Supercomputing Institute - gta at umn.edu

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