[openstack-dev] [nova] Evacuate instance which in server group with affinity policy

Alex Xu soulxu at gmail.com
Fri Dec 19 09:44:48 UTC 2014


There is problem when evacuate instance. If the instance is in the server
group with affinity policy, the instance can't evacuate out the failed
compute node.

I know there is soft affinity policy under development, but think of if the
instance in server group with hard affinity means no way to get it back
when compute node failed, it's really confuse.

I guess there should be some people concern that will violate the affinity
policy. But I think the compute node already down, all the instance in that
server group are down also, so I think we needn't care about the policy

I wrote up a patch can fix this problem:

We have some discussion on the gerrit (Thanks Sylvain for discuss with me),
but we still not sure we are on the right direction. So I bring this up at

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