[openstack-dev] [nova][cinder] Nova is now using the Cinder volume attachments API - multiattach comes next
jsbryant at electronicjungle.net
Sun Dec 17 20:17:45 UTC 2017
Well said Ildiko. Thank you!
On Sun, Dec 10, 2017, 8:23 PM Ildiko Vancsa <ildiko.vancsa at gmail.com> wrote:
> Thanks Matt for all the help so far and also for taking the time to write
> up this summary! I would like to join in saying thanks to the handful of
> people listed below who formed an amazing cross-project team during the
> past two years.
> I strongly believe that by hunting for multi-attach support we stepped on
> the right track in terms of the interactions between the API’s of Cinder
> and Nova and better readability and maintainability of the code base in
> both projects on the long run with the changes we’ve made so far.
> I hope we can grow our team onwards as testing will become even more
> crucial as we move forward with the remaining implementation work to reach
> the minimum functionality for multi-attach.
> Thank you All once more for the hard work! And see you on the weekly
> meeting next Thursday. :)
> (IRC: ildikov)
> > On 2017. Dec 9., at 13:15, Matt Riedemann <mriedemos at gmail.com> wrote:
> > I just wanted to take a minute to recognize that the patch  to make
> Nova use the new-style Cinder volume attach flow has merged.
> > As one can tell from the patch set count alone, this has been in the
> works for a long time now.
> > We were talking about volume multi-attach support back in Mitaka at the
> midcycle in Bristol. The early talks / patches would have piled more
> technical debt onto Nova and further baked in Nova's need to manage volume
> state, which is something we wanted to avoid, so at the Newton summit in
> Austin we changed course and decided to prioritize working on a new data
> model and API in Cinder, which eventually came out as the 3.27 volume
> attachments API in Ocata.
> > There was then serious work on both sides in Pike to start using the new
> 3.27 API and we found out we needed some more changes to Cinder, which
> became the 3.44 Cinder API in Queens. Now Nova has merged the change at the
> end of a very long series of changes to enable the new flow once 3.44 is
> available to Nova and computes are all upgraded to understand the new flow.
> One can appreciate the complexity here if you read through the Nova spec
> for the new attach flow .
> > I was really happy to see  merge this week because I knew we needed
> to get that in by the queens-2 milestone if we were going to have a shot at
> (1) flushing out stability issues before Queens RC1 and (2) a good chance
> to get multi-attach support into Nova in Queens.
> > We have a plan for multi-attach support  which I think is doable
> before feature freeze. The Cinder 3.48 API is now available too which Nova
> needs to correctly detach a multi-attach volume.
> > I want to thank everyone that's helped push this along for their
> dedication and patience, especially John Griffith, Ildiko Vancsa, Steve
> Noyes and John Garbutt. And thanks to Sean McGinnis, Jay Bryant, Walter
> Boring and Balazs Gibizer for review support.
> > We've had weekly meetings between the Nova and Cinder teams for at least
> two years now and I can finally see the end so let's keep up the momentum.
> >  https://review.openstack.org/#/c/330285/
> > 
> > 
> > --
> > Thanks,
> > Matt
> > OpenStack Development Mailing List (not for usage questions)
> > Unsubscribe:
> OpenStack-dev-request at lists.openstack.org?subject:unsubscribe
> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
> OpenStack Development Mailing List (not for usage questions)
> Unsubscribe: OpenStack-dev-request at lists.openstack.org?subject:unsubscribe
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the OpenStack-dev