[openstack-dev] [ironic] FFE request for node traits

Mark Goddard mark at stackhpc.com
Mon Jan 22 21:11:49 UTC 2018

The node traits feature [1] is an essential priority for ironic in Queens,
and is an important step in the continuing evolution of scheduling enabled
by the placement API. Traits will allow us to move away from
capability-based scheduling. Capabilities have several limitations for
scheduling including depending on filters in nova-scheduler rather than
allowing placement to select matching hosts. Several upcoming features
depend on traits [2].

Landing node traits late in the cycle will lead to less time being
available for testing, with a risk that the feature is release with
defects. There are changes at most major levels in the code except the
drivers, but these are for the most part fairly isolated from existing
code. The current issues with the grenade CI job mean that upgrade code
paths are not being exercised frequently, and could lead to additional
test/bug fix load on the team later in the cycle. The node traits code
patches are all in review [3], and are now generally getting positive
reviews or minor negative feedback.

rloo and TheJulia have kindly offered to review during the FFE window.

[3] https://review.openstack.org/#/q/topic:bug/1722194+(status:open)

Mark (mgoddard)
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