> From: Ryan Lane <rl...@wikimedia.org> > > We have submitted a patch https://review.openstack.org/#/c/11086/ to address > > https://blueprints.launchpad.net/nova/+spec/rebuild-for-ha that simplifies > > recovery from a node failure by introducing an API that recreates an > > instance on *another* host (similar to the existing instance 'rebuild' > > operation). [...] > If shared storage is available, the only think that likely needs to > happen is for the instance's host to be updated in the database, and > a reboot issued for the instance. That would keep everything identical, > and would likely be much faster.
That's pretty much what we do in 'manager' -- but what needs to happen in 'driver' is to (re)create the domain in libvirt on the destination host, re-attach volumes, floating IPs, etc. Essentially, everything 'spawn' is doing today, just without creating the new instance file. Of course, we don't re-provision the instance from image in this case. > - Ryan Regards, Alex
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