Hello Sam and David, Thank your for the responses, I really appreciate them.
> With clients the only issue I’ve had is with the designate client not being > backwards compatible between icehouse and juno. Ceilometer changed the way > they signed messaged between Icehouse and Juno which was a pain so we had to > set up parallel virtual hosts and collectors to push it into mongo. We only have Juno and Kilo in the environment. I haven't seen a major change in ceilometer in Kilo and I believe it should be fine since we don't have N, N-2 versions in the environment. > All the APIs are pretty stable so it shouldn’t really matter what version of > say keystone can work with what version of nova etc. We basically take it > for granted now although of course test in your own env. Yeah I think so. I will test it these days. > With nova make sure you set upgrade_levels so your nova control can talk to > you computes that are on version N-1 etc. What I will have for second site is Kilo neutron/cinder/glance/nova. Juno keystone and Juno clients (Horizon) will be shared. Since nova-api, nova-compute, nova-scheduler will be Kilo in the second site, there should be no problem. I believe Juno Horizon will make the requests to the Kilo endpoints, which is backward-compatible, and Kilo site will do the rest. So, in summary, we have the same version inside a site, but different versions in the whole environment for now. (Site A is Juno, Site B is Kilo, and Juno keystone/horizon is shared). I think it will just work. When upgrading the Juno site, I will start with nova and will take your responses into account. That's when I will have Juno+Kilo in one site. Regards, -- Eren Türkay, System Administrator https://skyatlas.com/ | +90 850 885 0357 Yildiz Teknik Universitesi Davutpasa Kampusu Teknopark Bolgesi, D2 Blok No:107 Esenler, Istanbul Pk.34220
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