ext_pillar:
  - cobbler:
#    - key: None
#    - only: mgmt_classes

#cobbler.url: http://127.0.0.1/cobbler_api
#cobbler.user: cobbler
#cobbler.password: cobbler

^^^^^^
Setting ANY of the above appears to break the return from cobbler.
Including setting only which also breaks the if key at the bottom of cobbler.py
---------------------------------------



# Import python libs
import logging
import xmlrpclib


__opts__ = {'cobbler.url': 'http://localhost/cobbler_api',
            'cobbler.user': None,
            'cobbler.password': None
           }


# Set up logging
log = logging.getLogger(__name__)


def ext_pillar(pillar, key=None, only=()):
    '''
    Read pillar data from Cobbler via its API.
    '''
    url = __opts__['cobbler.url']
    user = __opts__['cobbler.user']
    password = __opts__['cobbler.password']

    minion_id = __opts__['id']
    log.info("Querying cobbler at %r for information for %r", url, minion_id)
    try:
        server = xmlrpclib.Server(url, allow_none=True)
#####################################################################
#                                                                   #
# ANY ATTEMPT AS USING AUTH BREAKS THE server = xmlrpc LINE BELOW   #
# VERIFIED CORRECT CREDENTIALS BY USING PERL COBBLER API CALL       #
#                                                                   #
#####################################################################
        if user:
            server = xmlrpclib.Server(server, server.login(user, password))
        result = server.get_blended_data(None, minion_id)
    except Exception:
        log.exception(
            'Could not connect to cobbler.'
        )
        return {}

    if only:
        result = dict((k, result[k]) for k in only if k in result)

    if key:
        result = {key: result}

#####################################################################
#                                                                   #
#  ANY ATTEMPT AT USING only / key BREAKS THE ABOVE WITH KEY ERRORS #
#  ONLY WORKING WAY WAS TO USE THE FOLLOWING CODE MODUIFICATIONS    #
#                                                                   #
#####################################################################

    data = result["mgmt_classes"]
    result = {'cobbler': data}
    return result