On Wed, Feb 6, 2019 at 12:37 PM Linus Nilsson linus.nilsson@it.uu.se wrote:
Hi all,
I'm working on upgrading our cloud, which consists of a block storage system running Ceph 11.2.1 ("Kraken") and a controlplane running OSA Newton. We want to migrate to Ceph Mimic and OSA Rocky respectively. As part of the upgrade plan we are discussing first going to Rocky while keeping the block system at the "Kraken" release.
For the most part it comes down to your client libraries. Personally, I would upgrade Ceph first, leaving Openstack running older client libraries. I did this with Jewel clients talking to a Luminous cluster, so you should be fine with K->M. Then, when you upgrade Openstack, your client libraries can get updated along with it. If you do Openstack first, you'll need to come back around and update your clients, and that will require you to restart everything a second time. .
It would be helpful to know if anyone has attempted to run the Rocky Cinder/Glance drivers with Ceph Kraken or older?
I haven't done this specific combination, but I have mixed and matched Openstack and Ceph versions without any issues. I have MItaka, Queens, and Rocky all talking to Luminous without incident.
-Erik
References or documentation is welcomed. I fail to find much information online, but perhaps I'm looking in the wrong places or I'm asking a question with an obvious answer.
Thanks!
Best regards, Linus UPPMAX
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