Open Stack

Hi all,

I know we've all been looking at the HA Active-Active problem in Cinder
and trying our best to figure out possible solutions to the different
issues, and since current plan is going to take a while (because it
requires that we finish first fixing Cinder-Nova interactions), I've been
looking at alternatives that allow Active-Active configurations without
needing to wait for those changes to take effect.

And I think I have found a possible solution, but since the HA A-A
problem has a lot of moving parts I ended up upgrading my initial
Etherpad notes to a post [1].

Even if we decide that this is not the way to go, which we'll probably
do, I still think that the post brings a little clarity on all the
moving parts of the problem, even some that are not reflected on our
Etherpad [2], and it can help us not miss anything when deciding on a
different solution.

Cheers,
Gorka.

[1]: http://gorka.eguileor.com/a-cinder-road-to-activeactive-ha/
[2]: https://etherpad.openstack.org/p/cinder-active-active-vol-service-issues