2014-12-22 9:01 GMT+08:00 Lingxian Kong <anlin.k...@gmail.com>:

> 2014-12-19 17:44 GMT+08:00 Alex Xu <sou...@gmail.com>:
> > Hi,
> >
> > 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
> > anymore.
>
> but what if the compute node is back to normal? There will be
> instances in the same server group with affinity policy, but located
> in different hosts.
>
>
If operator decide to evacuate the instance from the failed host, we should
fence the failed host first.
So the failed host shoudn't have chance to get back.



> >
> > I wrote up a patch can fix this problem:
> > https://review.openstack.org/#/c/135607/
> >
> >
> > 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
> > here.
> >
> > Thanks
> > Alex
> >
> >
> > _______________________________________________
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> > OpenStack-dev@lists.openstack.org
> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
> >
>
>
>
> --
> Regards!
> -----------------------------------
> Lingxian Kong
>
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