2017-04-25 13:53:13,387 - util.py[DEBUG]: Running module chef (<module 'cloudinit.config.cc_chef' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_chef.py'>) failed
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 783, in _run_modules
    freq=freq)
  File "/usr/lib/python3/dist-packages/cloudinit/cloud.py", line 54, in run
    return self._runners.run(name, functor, args, freq, clear_on_fail)
  File "/usr/lib/python3/dist-packages/cloudinit/helpers.py", line 187, in run
    results = functor(*args)
  File "/usr/lib/python3/dist-packages/cloudinit/config/cc_chef.py", line 245, in handle
    for k in list(initial_attributes.keys()):
AttributeError: 'NoneType' object has no attribute 'keys'