[openstack-dev] [nova] Question about force_host skip filters

Gary Kotton gkotton at vmware.com
Thu Feb 12 09:27:43 UTC 2015


Hi,
I think that the filters should be applied to the list of hosts that are in 'force_hosts'. I am not sure if this is what you are suggesting. If this is not then case then it sounds like a bug.
Thanks
Gary

From: Rui Chen <chenrui.momo at gmail.com<mailto:chenrui.momo at gmail.com>>
Reply-To: OpenStack List <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Date: Thursday, February 12, 2015 at 11:05 AM
To: OpenStack List <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Subject: [openstack-dev] [nova] Question about force_host skip filters

Hi:

   If we boot instance with 'force_hosts', the force host will skip all filters, looks like that it's intentional logic, but I don't know the reason.

   I'm not sure that the skipping logic is apposite, I think we should remove the skipping logic, and the 'force_hosts' should work with the scheduler, test whether the force host is appropriate ASAP. Skipping filters and postponing the booting failure to nova-compute is not advisable.

    On the other side, more and more options had been added into flavor, like NUMA, cpu pinning, pci and so on, forcing a suitable host is more and more difficult.


Best Regards.
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