[Openstack-operators] [nova] Default scheduler filters survey

Artom Lifshitz alifshit at redhat.com
Wed Apr 18 15:17:23 UTC 2018

Hi all,

A CI issue [1] caused by tempest thinking some filters are enabled
when they're really not, and a proposed patch [2] to add
(Same|Different)HostFilter to the default filters as a workaround, has
led to a discussion about what filters should be enabled by default in

The default filters should make sense for a majority of real world
deployments. Adding some filters to the defaults because CI needs them
is faulty logic, because the needs of CI are different to the needs of
operators/users, and the latter takes priority (though it's my
understanding that a good chunk of operators run tempest on their
clouds post-deployment as a way to validate that the cloud is working
properly, so maybe CI's and users' needs aren't that different after

To that end, we'd like to know what filters operators are enabling in
their deployment. If you can, please reply to this email with your
[filter_scheduler]/enabled_filters (or
[DEFAULT]/scheduler_default_filters if you're using an older version)
option from nova.conf. Any other comments are welcome as well :)


[1] https://bugs.launchpad.net/tempest/+bug/1628443
[2] https://review.openstack.org/#/c/561651/

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