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[Bug 1911700] [NEW] glance status upgrade check fails with TypeError

 

Public bug reported:

When the 'enabled_backends' option has not been set, it defaults to None
and we get the following error:

$ touch test.conf
$ glance-status --config-file=./test.conf upgrade check
Error:
Traceback (most recent call last):
  File "/home/cyril/openstack/glance/v/lib/python3.9/site-packages/oslo_upgradecheck/upgradecheck.py", line 196, in run
    return conf.command.action_fn()
  File "/home/cyril/openstack/glance/v/lib/python3.9/site-packages/oslo_upgradecheck/upgradecheck.py", line 106, in check
    result = func(self)
  File "/home/cyril/openstack/glance/glance/cmd/status.py", line 36, in _check_sheepdog_store
    if 'sheepdog' in getattr(CONF, 'enabled_backends', {}):
TypeError: argument of type 'NoneType' is not iterable

** Affects: glance
     Importance: Undecided
     Assignee: Cyril Roelandt (cyril-roelandt)
         Status: New

** Changed in: glance
     Assignee: (unassigned) => Cyril Roelandt (cyril-roelandt)

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https://bugs.launchpad.net/bugs/1911700

Title:
  glance status upgrade check fails with TypeError

Status in Glance:
  New

Bug description:
  When the 'enabled_backends' option has not been set, it defaults to
  None and we get the following error:

  $ touch test.conf
  $ glance-status --config-file=./test.conf upgrade check
  Error:
  Traceback (most recent call last):
    File "/home/cyril/openstack/glance/v/lib/python3.9/site-packages/oslo_upgradecheck/upgradecheck.py", line 196, in run
      return conf.command.action_fn()
    File "/home/cyril/openstack/glance/v/lib/python3.9/site-packages/oslo_upgradecheck/upgradecheck.py", line 106, in check
      result = func(self)
    File "/home/cyril/openstack/glance/glance/cmd/status.py", line 36, in _check_sheepdog_store
      if 'sheepdog' in getattr(CONF, 'enabled_backends', {}):
  TypeError: argument of type 'NoneType' is not iterable

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