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[OpenStack Infra <1669433@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/441881
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=a17851ab0ab1296e587c582523e9421a06e20597
Submitter: Jenkins
Branch:    master

commit a17851ab0ab1296e587c582523e9421a06e20597
Author: Roman Podoliaka <rpodolyaka@xxxxxxxxxxxx>
Date:   Mon Mar 6 12:45:51 2017 +0200

    nova-status: require placement >= 1.4
    
    Since Ia1a0066dc30025c02553584a077365b28d8ff80e FilterScheduler will
    no longer fall back to not using placement API. We need to require
    version 1.4 to prevent NoValidHost errors.
    
    Closes-Bug: #1669433
    
    Change-Id: I6666cb2f558ed1f4e83f21e0317a206b07c25134


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1669433

Title:
  nova-status needs to check that placement 1.4 is available for pike

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  In Ocata, nova-compute wouldn't start if placement wasn't available,
  but it didn't check the version so placement from newton will still
  work with ocata computes. Also, the filter scheduler will fallback to
  not using placement if the computes aren't all new enough yet, but
  even once the computes are upgraded if placement is not the latest and
  microversion 1.4 isn't available, then the filter scheduler will not
  find any resource providers and it will result in a NoValidHost error.

  For Pike, the fallback code for the older computes has been removed
  from the filter scheduler:

  https://review.openstack.org/#/c/436180/

  So we're always calling placement from the filter scheduler. However,
  we don't enforce a minimum version of placement and we need 1.4 for
  the filter scheduler to work. We should add a check to the "nova-
  status upgrade check" command to enforce that placement is running
  with at least the 1.4 microversion (ocata) before upgrading to Pike.

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