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[OpenStack Infra <1633535@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/401042
Committed: https://git.openstack.org/cgit/openstack/tempest/commit/?id=09139283b8d67aadc79da8b625d00d08872e4270
Submitter: Jenkins
Branch:    master

commit 09139283b8d67aadc79da8b625d00d08872e4270
Author: Ken'ichi Ohmichi <ken-oomichi@xxxxxxxxxxxxx>
Date:   Thu Dec 1 14:36:22 2016 -0800

    Add a test for attaching 2 volumes to a server
    
    In Newton development, we could not attach multiple volumes to a
    single server. That seemed critical bug and it is good to block
    such changes in the future.
    
    Change-Id: Icdeafb5f30159205c89cb76a8d38399cefcb6127
    Closes-Bug: #1633535


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

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https://bugs.launchpad.net/bugs/1633535

Title:
  Cinder fails to attach second volume to Nova VM

Status in Cinder:
  In Progress
Status in ec2-api:
  Fix Released
Status in Manila:
  Confirmed
Status in OpenStack Compute (nova):
  New
Status in tempest:
  Fix Released

Bug description:
  Cinder fails to attach second volume to Nova VM. This second volume gets "in-use" status, but does not have any attachments. Also,  such volume cannot be detached from VM [4].  Test gerrit change [2] proves that commit to Cinder [3] is THE CAUSE of a bug.
  Also, bug was reproduced even before merge of [3] with "gate-rally-dsvm-cinder" CI job [4], but, I assume, no one has paid attention to this.

  Local testing shows that IF bug appears then volume never gets
  attached and list of attachments stays empty. And waiting between
  'create' (wait until 'available' status) and 'attach' commands does
  not help at all.

  How to reproduce:
  1) Create VM
  2) Create Volume
  3) Attach volume (2) to the VM (1)
  4) Create second volume
  5) Try attach second volume (4) to VM (1) - it will fail.

  [Tempest] Also, the fact that Cinder gates passed with [3] means that
  tempest does not have test that attaches more than one volume to one
  Nova VM. And it is also tempest bug, that should be addressed.

  [Manila] In scope of Manila project, one of its drivers is broken -
  Generic driver that uses Cinder as backend.

  [1] http://logs.openstack.org/64/386364/1/check/gate-manila-tempest-
  dsvm-postgres-generic-singlebackend-ubuntu-xenial-
  nv/eef11b0/logs/screen-m-shr.txt.gz?level=TRACE#_2016-10-14_15_15_19_898

  [2] https://review.openstack.org/387915

  [3]
  https://github.com/openstack/cinder/commit/6f174b412696bfa6262a5bea3ac42f45efbbe2ce
  ( https://review.openstack.org/385122 )

  [4] http://logs.openstack.org/22/385122/1/check/gate-rally-dsvm-
  cinder/b0332e2/rally-
  plot/results.html.gz#/CinderVolumes.create_snapshot_and_attach_volume/failures

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