Le 11/09/2014 01:10, Joe Cropper a écrit :
Agreed - I’ll draft up a formal proposal in the next week or two and we can
focus the discussion there. Thanks for the feedback - this provides a good
framework for implementation considerations.
Count me on it, I'm interested in discussing the next stage.
When preparing the scheduler split, I just discovered it was unnecessary
to keep the instance groups setup in the scheduler, because it was
creating dependencies to other Nova objects that the Scheduler doesn't
necessarly need to handle.
I proposed accordingly a patch for moving the logic to the conductor
instead, see the proposal here :
https://review.openstack.org/110043
Reviews are welcome of course.
-Sylvain
- Joe
On Sep 10, 2014, at 6:00 PM, Russell Bryant <rbry...@redhat.com> wrote:
On 09/10/2014 06:46 PM, Joe Cropper wrote:
Hmm, not sure I follow the concern, Russell. How is that any different
from putting a VM into the group when it’s booted as is done today?
This simply defers the ‘group insertion time’ to some time after
initial the VM’s been spawned, so I’m not sure this creates anymore race
conditions than what’s already there [1].
[1] Sure, the to-be-added VM could be in the midst of a migration or
something, but that would be pretty simple to check make sure its task
state is None or some such.
The way this works at boot is already a nasty hack. It does policy
checking in the scheduler, and then has to re-do some policy checking at
launch time on the compute node. I'm afraid of making this any worse.
In any case, it's probably better to discuss this in the context of a
more detailed design proposal.
--
Russell Bryant
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