[openstack-dev] [Openstack-operators] [nova] Supporting force live-migrate and force evacuate with nested allocations

Dan Smith dms at danplanet.com
Wed Oct 10 15:58:20 UTC 2018

>> I disagree on this. I'd rather just do a simple check for >1
>> provider in the allocations on the source and if True, fail hard.
>> The reverse (going from a non-nested source to a nested destination)
>> will hard fail anyway on the destination because the POST
>> /allocations won't work due to capacity exceeded (or failure to have
>> any inventory at all for certain resource classes on the
>> destination's root compute node).
> I agree with Jay here. If we know the source has allocations on >1
> provider, just fail fast, why even walk the tree and try to claim
> those against the destination - the nested providers aren't going to
> be the same UUIDs on the destination, *and* trying to squash all of
> the source nested allocations into the single destination root
> provider and hope it works is super hacky and I don't think we should
> attempt that. Just fail if being forced and nested allocations exist
> on the source.

Same, yeah.


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