error

(craton) ubuntu@ubuntu-xenial:~/craton/craton/common$ python t-policy-using-role-assignments.py 
{
    "fleet:audit": "(role:admin or (principal:%(principal)s and role_:%(role_)s and resource:%(resource)s))"
}
Traceback (most recent call last):
  File "t-policy-using-role-assignments.py", line 54, in <module>
    ENF.register_defaults(rules)
  File "/home/ubuntu/craton/lib/python3.5/site-packages/oslo_policy/policy.py", line 761, in register_defaults
    self.register_default(default)
  File "/home/ubuntu/craton/lib/python3.5/site-packages/oslo_policy/policy.py", line 747, in register_default
    if default.name in self.registered_rules:
AttributeError: 'str' object has no attribute 'name'

rbac-oslo

(craton) ubuntu@ubuntu-xenial:~/craton/craton/common$ cat t-policy-using-role-assignments.py 
# Copyright (c) 2015 OpenStack Foundation
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

"""Policy Engine for craton."""

from oslo_config import cfg
from oslo_policy import policy as common_policy
from craton import exceptions
import pdb

CONF = cfg.CONF  # should just be an empty config file
ENFORCER = common_policy.Enforcer(CONF)

ENF = common_policy.Enforcer(CONF, policy_file=None)

rules = {
        "fleet:audit": "role:admin or (principal:%(principal)s and role_:%(role_)s and resource:%(resource)s)"
}


these_rules = common_policy.Rules.from_dict(rules)
print(these_rules)

ENFORCER.set_rules(these_rules)
ENFORCER.check_rules()

credentials = {'roles': ['user'], 'principal': 'foo', 'role_': 'fleet:audit', 'resource': 'baz'}
target = {'principal':'foo', 'role_':'fleet:audit', 'resource':'baz'}
ENFORCER.enforce("fleet:audit", target, credentials, do_raise=True)

#Using Enforcer Authorize
ENF.check_rules()
ENF.set_rules(these_rules)
ENF.register_defaults(rules)
ENF.register_default(policy.default('fleet:audit', 'rule: fleet:audit'))
ENFORCER.authorize("fleet:audit", target, credentials, do_raise=True)