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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

(1:29:28 PM) mgoddard: mriedem: the scheduling works, but any flavor-requested traits won't be pushed to the ironic node's instance_info. These are not yet used by ironic, but will be used in future for some capabilities-like things
(1:29:49 PM) mriedem: mgoddard: if they aren't used in ironic in queens, then it's not something worth holding up rc2 IMO

** Also affects: nova/queens
   Importance: Undecided
       Status: New

** Changed in: nova/queens
       Status: New => Confirmed

** Changed in: nova/queens
   Importance: Undecided => Low

** Changed in: nova
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1748942

Title:
  Ironic virt driver should not JSON encode traits in instance_info

Status in OpenStack Compute (nova):
  In Progress
Status in OpenStack Compute (nova) queens series:
  Confirmed

Bug description:
  As of queens, the ironic virt driver pushes traits set on the flavor
  to the ironic node's instance_info during instance spawn. This list of
  traits is currently encoded as a JSON string, inside the JSON-encoded
  instance_info. We should not use this double layer of JSON encoding,
  as ironic expects instance_info.traits to be a list.

  Steps to reproduce
  ==================

  Add a trait to an ironic node:

  openstack baremetal node add trait <node> <trait>

  Add a required trait to a flavor:

  openstack flavor set <flavor> --property 'trait:<trait>=required'

  Create an instance using this flavor:

  openstack server create ...

  Expected result
  ===============

  Nova sets the node's instance_info.traits to a list containing the
  trait.

  Actual result
  =============

  Nova sets the node's instance_info.traits to a JSON-encoded string
  containing a list containing the trait.

  Environment
  ===========

  Nova stable/queens @ 01b756f960ed19ab801994d08d749dd94d729a22

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