Open Stack

On 2/6/19 6:55 PM, Erik McCormick wrote:
> On Wed, Feb 6, 2019 at 12:37 PM Linus Nilsson <linus.nilsson at 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.
> .

Thanks. Upgrading first to Luminous is certainly an option.

>> 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

OK, good to know. Perhaps the plan becomes upgrade to Luminous first and 
then

Newton -> Ocata -> Pike -> Queens -> Rocky

and finally go Luminous -> Mimic.

Best regards,
Linus
UPPMAX
>> 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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