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[Yaguang Tang <yaguang.tang@xxxxxxxxxxxxx>]

** Changed in: horizon/icehouse
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1297920

Title:
  Completely disabled availability zone cause horizon to trace at
  availability zones list

Status in OpenStack Dashboard (Horizon):
  Fix Released
Status in OpenStack Dashboard (Horizon) havana series:
  Fix Released
Status in OpenStack Dashboard (Horizon) icehouse series:
  Fix Released

Bug description:
  If all compute nodes in some availability zone are disabled, horizon
  trace at availability zones list.

  Steps to reproduce:

  1. Create host aggregate and availability zone (nova aggreage-create some some)
  2. Add some (at least one) host to that host aggregate (nova aggreage-add-host some compute_host)
  3. Disable service at all compute_hosts (nova service-disable compute_host nova-compute)
  4. Go to (in dashboard) Admin -> System Info -> Availability Zones

  Expected result:

  Output with list of availabilizy zones

  Actual Result:

  TemplateSyntaxError at /admin/info/

  'NoneType' object has no attribute 'items'

  Request Method: 	GET
  Request URL: 	http://dashboard.local/horizon/admin/info/
  Django Version: 	1.5.4
  Exception Type: 	TemplateSyntaxError
  Exception Value:

  'NoneType' object has no attribute 'items'

  Exception Location: 	/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../../openstack_dashboard/dashboards/admin/info/tables.py in get_hosts, line 60
  Python Executable: 	/usr/bin/python
  Python Version: 	2.7.3
  Python Path:

  ['/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../..',
   '/usr/lib/python2.7',
   '/usr/lib/python2.7/plat-linux2',
   '/usr/lib/python2.7/lib-tk',
   '/usr/lib/python2.7/lib-old',
   '/usr/lib/python2.7/lib-dynload',
   '/usr/local/lib/python2.7/dist-packages',
   '/usr/lib/python2.7/dist-packages',
   '/usr/share/openstack-dashboard/',
   '/usr/share/openstack-dashboard/openstack_dashboard']

  Server time:    Wed, 26 Mar 2014 15:53:32 +0000

  P. S.
  +------------------+------+-----------+----------+-------+----------------------------+-----------------+
  | Binary           | Host | Zone      | Status   | State | Updated_at                 | Disabled Reason |
  +------------------+------+-----------+----------+-------+----------------------------+-----------------+
  | nova-scheduler   | pp1  | internal  | enabled  | up    | 2014-03-26T15:54:34.000000 | None            |
  | nova-consoleauth | pp1  | internal  | enabled  | up    | 2014-03-26T15:54:32.000000 | None            |
  | nova-conductor   | pp1  | internal  | enabled  | up    | 2014-03-26T15:54:39.000000 | None            |
  | nova-cert        | pp1  | internal  | enabled  | up    | 2014-03-26T15:54:35.000000 | None            |
  | nova-compute     | pp7  | test,nova | disabled | up    | 2014-03-26T15:54:34.000000 | None            |
  | nova-compute     | pp4  | nova      | enabled  | up    | 2014-03-26T15:54:33.000000 | None            |
  | nova-compute     | pp3  | nova      | enabled  | up    | 2014-03-26T15:54:39.000000 | None            |
  +------------------+------+-----------+----------+-------+----------------------------+-----------------+

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