1 # -------------------------------------------------------------------------
2 # Copyright (c) 2015-2017 AT&T Intellectual Property
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
16 # -------------------------------------------------------------------------
27 from requests import RequestException
28 from osdf.operation.exceptions import BusinessException
29 from osdf.adapters.local_data.local_policies import get_local_policies
30 from osdf.adapters.policy.utils import policy_name_as_regex, retrieve_node
31 from osdf.utils.programming_utils import list_flatten, dot_notation
32 from osdf.config.base import osdf_config
33 from osdf.logging.osdf_logging import audit_log, MH, metrics_log, debug_log
34 from osdf.utils.interfaces import RestClient
37 def get_by_name(rest_client, policy_name_list, wildcards=True):
39 for policy_name in policy_name_list:
41 query_name = policy_name
43 query_name = policy_name_as_regex(query_name)
44 policy_list.append(rest_client.request(json={"policyName": query_name}))
45 except RequestException as err:
46 audit_log.warn("Error in fetching policy: " + policy_name)
47 raise BusinessException("Cannot fetch policy {}: ".format(policy_name), err)
51 def get_by_scope(rest_client, req, config_local, type_service):
52 """ Get policies by scopes as defined in the configuration file.
53 :param rest_client: a rest client object to make a call.
54 :param req: an optimization request.
55 :param config_local: application configuration file.
56 :param type_service: the type of optimization service.
57 :return: policies in the form of list of list where inner list contains policies for a single a scope.
60 references = config_local.get('references', {})
61 pscope = config_local.get('policy_info', {}).get(type_service, {}).get('policy_scope', [])
65 for key in scopes.keys():
66 for field in scopes[key]:
67 scope_fields[key] = set(list_flatten([get_scope_fields(field, references, req, policies)
68 if 'get_param' in field else field]))
69 if scope_fields.get('resources') and len(scope_fields['resources']) > 1:
70 for s in scope_fields['resources']:
71 scope_fields['resources'] = [s]
72 policies.update(policy_api_call(rest_client, scope_fields).get('policies', {}))
74 policies.update(policy_api_call(rest_client, scope_fields).get('policies', {}))
75 for policyName in policies.keys():
76 keys = scope_fields.keys() & policies[policyName]['properties'].keys()
78 policy[policyName] = policies[policyName]
79 scope_policies.append(policy for k in keys
80 if set(policies.get(policyName, {}).get('properties',{}).get(k)) >= set(scope_fields[k])
81 and policy not in scope_policies)
86 def get_scope_fields(field, references, req, policies):
87 """ Retrieve the values for scope fields from a request and policies as per the configuration
88 and references defined in a configuration file. If the value of a scope field missing in a request or
89 policies, throw an exception since correct policies cannot be retrieved.
90 :param field: details on a scope field from a configuration file.
91 :param references: references defined in a configuration file.
92 :param req: an optimization request.
93 :param policy_info: a list of policies.
94 :return: scope fields retrieved from a request and policies.
96 ref_source = references.get(field.get('get_param', ""), {}).get('source')
97 ref_value = references.get(field.get('get_param', ""), {}).get('value')
98 if ref_source == "request":
99 scope_field = dot_notation(req, ref_value)
102 raise BusinessException("Field {} is missing a value in a request".format(ref_value.split('.')[-1]))
105 for policyName in policies.keys():
106 policy_content = policies.get(policyName)
107 if policy_content.get('type', "invalid_policy") == ref_source:
108 scope_fields.append(dot_notation(policy_content, ref_value))
109 scope_values = list_flatten(scope_fields)
110 if len(scope_values) > 0:
112 raise BusinessException("Field {} is missing a value in all policies of type {}".format(
113 ref_value.split('.')[-1], ref_source))
115 def policy_api_call(rest_client, scope_fields):
117 :param rest_client: rest client to make a call
118 :param scope_fields: a collection of scopes to be used for filtering
119 :return: a list of policies matching all filters
121 api_call_body = {"ONAPName": "OOF",
122 "ONAPComponent": "OOF_Component",
123 "ONAPInstance": "OOF_Component_Instance",
124 "action": "optimize",
125 "resources": "{}".format(scope_fields)}
126 return rest_client.request(json=api_call_body)
128 def remote_api(req_json, osdf_config, service_type="placement"):
129 """Make a request to policy and return response -- it accounts for multiple requests that be needed
130 :param req_json: policy request object (can have multiple policy names)
131 :param osdf_config: main config that will have credential information
132 :param service_type: the type of service to call: "placement", "scheduling"
133 :return: all related policies and provStatus retrieved from Subscriber policy
135 config = osdf_config.deployment
136 uid, passwd = config['policyPlatformUsername'], config['policyPlatformPassword']
137 url = config['policyPlatformUrl']
138 rc = RestClient(userid=uid, passwd=passwd, url=url, log_func=debug_log.debug)
140 if osdf_config.core['policy_info'][service_type]['policy_fetch'] == "by_name":
141 policies = get_by_name(rc, req_json[service_type + "Info"]['policyId'], wildcards=True)
142 elif osdf_config.core['policy_info'][service_type]['policy_fetch'] == "by_name_no_wildcards":
143 policies = get_by_name(rc, req_json[service_type + "Info"]['policyId'], wildcards=False)
145 policies = get_by_scope(rc, req_json, osdf_config.core, service_type)
147 formatted_policies = []
148 for x in itertools.chain(*policies):
149 if x[list(x.keys())[0]].get('properties') is None:
150 raise BusinessException("Properties not found for policy with name %s" % x[list(x.keys()[0])])
152 formatted_policies.append(x)
153 return formatted_policies
156 def local_policies_location(req_json, osdf_config, service_type):
158 Get folder and list of policy_files if "local policies" option is enabled
159 :param service_type: placement supported for now, but can be any other service
160 :return: a tuple (folder, file_list) or None
162 lp = osdf_config.core.get('osdf_temp', {}).get('local_policies', {})
163 if lp.get('global_disabled'):
164 return None # short-circuit to disable all local policies
165 if lp.get('local_{}_policies_enabled'.format(service_type)):
166 debug_log.debug('Loading local policies for service type: {}'.format(service_type))
167 if service_type == "scheduling":
168 return lp.get('{}_policy_dir'.format(service_type)), lp.get('{}_policy_files'.format(service_type))
170 service_name = req_json['serviceInfo']['serviceName'] # TODO: data_mapping.get_service_type(model_name)
171 debug_log.debug('Loading local policies for service name: {}'.format(service_name))
172 return lp.get('{}_policy_dir_{}'.format(service_type, service_name.lower())), \
173 lp.get('{}_policy_files_{}'.format(service_type, service_name.lower()))
177 def get_policies(request_json, service_type):
178 """Validate the request and get relevant policies
179 :param request_json: Request object
180 :param service_type: the type of service to call: "placement", "scheduling"
181 :return: policies associated with this request and provStatus retrieved from Subscriber policy
183 req_info = request_json['requestInfo']
184 req_id = req_info['requestId']
185 metrics_log.info(MH.requesting("policy", req_id))
186 local_info = local_policies_location(request_json, osdf_config, service_type)
188 if local_info: # tuple containing location and list of files
189 if local_info[0] is None or local_info[1] is None:
190 raise ValueError("Error fetching local policy info")
192 if osdf_config.core['policy_info'][service_type]['policy_fetch'] == "by_name":
193 to_filter = request_json[service_type + "Info"]['policyId']
194 policies = get_local_policies(local_info[0], local_info[1], to_filter)
196 policies = remote_api(request_json, osdf_config, service_type)
200 def upload_policy_models():
201 """Upload all the policy models reside in the folder"""
202 requestId = uuid.uuid4()
203 config = osdf_config.deployment
204 model_path = config['pathPolicyModelUpload']
205 uid, passwd = config['policyPlatformUsername'], config['policyPlatformPassword']
206 pcuid, pcpasswd = config['policyClientUsername'], config['policyClientPassword']
207 headers = {"ClientAuth": base64.b64encode(bytes("{}:{}".format(pcuid, pcpasswd), "ascii"))}
208 headers.update({'Environment': config['policyPlatformEnv']})
209 headers.update({'X-ONAP-RequestID': requestId})
210 url = config['policyPlatformUrlModelUpload']
211 rc = RestClient(userid=uid, passwd=passwd, headers=headers, url=url, log_func=debug_log.debug)
213 for file in os.listdir(model_path):
214 if not file.endswith(".yaml"):
216 with open(file) as f:
217 file_converted = json.dumps(yaml.load(f))
218 response = rc.request(json=file_converted, ok_codes=(200))
221 audit_log.warn("Policy model %s uploading failed!" % file)
223 return "Policy model uploading success!"
225 return "Policy model uploading not success!"