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authorkrishnaa96 <krishna.moorthy6@wipro.com>2020-03-23 13:11:07 +0530
committerkrishnaa96 <krishna.moorthy6@wipro.com>2020-03-23 13:16:31 +0530
commitfcb37e97e37137d3111924e993e75fdb83c2a0a0 (patch)
treeb907cf4f4fb01b8961747f50caf9b9937e0b54fe /apps/slice_selection/optimizers
parentf0f912e2e8cb23952099c3df83167181a50ab2f8 (diff)
Add functionality to support NSI selection
Issue-ID: OPTFRA-677 Signed-off-by: krishnaa96 <krishna.moorthy6@wipro.com> Change-Id: Ibc51e15fce4692a445df400053060d3a6977b4ce
Diffstat (limited to 'apps/slice_selection/optimizers')
-rw-r--r--apps/slice_selection/optimizers/__init__.py17
-rw-r--r--apps/slice_selection/optimizers/conductor/__init__.py0
-rw-r--r--apps/slice_selection/optimizers/conductor/remote_opt_processor.py104
-rw-r--r--apps/slice_selection/optimizers/conductor/response_processor.py123
4 files changed, 244 insertions, 0 deletions
diff --git a/apps/slice_selection/optimizers/__init__.py b/apps/slice_selection/optimizers/__init__.py
new file mode 100644
index 0000000..b45f74d
--- /dev/null
+++ b/apps/slice_selection/optimizers/__init__.py
@@ -0,0 +1,17 @@
+# -------------------------------------------------------------------------
+# Copyright (C) 2020 Wipro Limited.
+#
+# 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.
+#
+# -------------------------------------------------------------------------
+#
diff --git a/apps/slice_selection/optimizers/conductor/__init__.py b/apps/slice_selection/optimizers/conductor/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/apps/slice_selection/optimizers/conductor/__init__.py
diff --git a/apps/slice_selection/optimizers/conductor/remote_opt_processor.py b/apps/slice_selection/optimizers/conductor/remote_opt_processor.py
new file mode 100644
index 0000000..a44fc4e
--- /dev/null
+++ b/apps/slice_selection/optimizers/conductor/remote_opt_processor.py
@@ -0,0 +1,104 @@
+# -------------------------------------------------------------------------
+# Copyright (C) 2020 Wipro Limited.
+#
+# 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.
+#
+# -------------------------------------------------------------------------
+#
+
+"""
+Module for processing slice selection request
+"""
+
+import json
+import traceback
+from requests import RequestException
+
+from apps.slice_selection.optimizers.conductor.response_processor \
+ import conductor_response_processor, conductor_error_response_processor
+from osdf.adapters.conductor import conductor
+from osdf.adapters.policy.interface import get_policies
+from osdf.adapters.policy.utils import group_policies_gen
+from osdf.logging.osdf_logging import error_log, debug_log
+from osdf.utils.mdc_utils import mdc_from_json
+
+
+def process_nsi_selection_opt(request_json, osdf_config):
+ """Process the nsi selection request from API layer
+ :param request_json: api request
+ :param policies: flattened policies corresponding to this request
+ :param osdf_config: configuration specific to OSDF app
+ :return: response as a dictionary
+ """
+ req_info = request_json['requestInfo']
+ try:
+ mdc_from_json(request_json)
+
+ overall_recommendations = dict()
+ nst_info_map = dict()
+ for nst_info in request_json["NSTInfoList"]:
+ nst_name = nst_info["modelName"]
+ nst_info_map["nst_name"] = {"NSTName": nst_name,
+ "UUID": nst_info["modelVersionId"],
+ "invariantUUID": nst_info["modelInvariantId"]}
+
+ policy_request_json = request_json.copy()
+ policy_request_json['serviceInfo']['serviceName'] = nst_name
+
+ policies = get_policies(policy_request_json, "slice_selection")
+
+ demands = get_slice_demands(nst_name, policies, osdf_config.core)
+
+ request_parameters = {}
+ service_info = {}
+ req_info['numSolutions'] = 'all'
+ resp = conductor.request(req_info, demands, request_parameters, service_info, False,
+ osdf_config, policies)
+ debug_log.debug("Response from conductor {}".format(str(resp)))
+ overall_recommendations[nst_name] = resp["plans"][0].get("recommendations")
+
+ return conductor_response_processor(overall_recommendations, nst_info_map, req_info)
+
+ except Exception as ex:
+ error_log.error("Error for {} {}".format(req_info.get('requestId'),
+ traceback.format_exc()))
+ if isinstance(ex, RequestException):
+ try:
+ error_message = json.loads(ex.response)['plans'][0]['message']
+ except Exception:
+ error_message = "Problem connecting to conductor"
+ else:
+ error_message = str(ex)
+ return conductor_error_response_processor(req_info, error_message)
+
+
+def get_slice_demands(model_name, policies, config):
+ """
+ :param model_name: model name of the slice
+ :param policies: flattened polcies corresponding to the request
+ :param config: configuration specific to OSDF app
+ :return: list of demands for the request
+ """
+ group_policies = group_policies_gen(policies, config)
+ subscriber_policy_list = group_policies["onap.policies.optimization.SubscriberPolicy"]
+ slice_demands = list()
+ for subscriber_policy in subscriber_policy_list:
+ policy_properties = subscriber_policy[list(subscriber_policy.keys())[0]]['properties']
+ if model_name in policy_properties["services"]:
+ subnet_attributes = policy_properties["properties"]["subscriberRole"][0]
+ for subnet in policy_properties["properties"]["subscriberName"]:
+ slice_demand = dict()
+ slice_demand["resourceModuleName"] = subnet
+ slice_demand['resourceModelInfo'] = subnet_attributes[subnet]
+ slice_demands.append(slice_demand)
+ return slice_demands
diff --git a/apps/slice_selection/optimizers/conductor/response_processor.py b/apps/slice_selection/optimizers/conductor/response_processor.py
new file mode 100644
index 0000000..5b7be01
--- /dev/null
+++ b/apps/slice_selection/optimizers/conductor/response_processor.py
@@ -0,0 +1,123 @@
+# -------------------------------------------------------------------------
+# Copyright (C) 2020 Wipro Limited.
+#
+# 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.
+#
+# -------------------------------------------------------------------------
+#
+
+"""
+Module for processing response from conductor for slice selection
+"""
+
+from osdf.logging.osdf_logging import debug_log
+
+
+SLICE_PROFILE_FIELDS = ["latency", "max_number_of_ues", "coverage_area_ta_list",
+ "ue_mobility_level", "resource_sharing_level", "exp_data_rate_ul",
+ "exp_data_rate_dl", "area_traffic_cap_ul", "area_traffic_cap_dl",
+ "activity_factor", "e2e_latency", "jitter", "survival_time",
+ "exp_data_rate", "payload_size", "traffic_density", "conn_density",
+ "reliability", "service_area_dimension", "cs_availability"]
+
+
+def conductor_response_processor(overall_recommendations, nst_info_map, request_info):
+ """Process conductor response to form the response for the API request
+ :param overall_recommendations: recommendations from conductor
+ :param nst_info_map: NST info from the request
+ :param request_info: request info
+ :return: response json as a dictionary
+ """
+ shared_nsi_solutions = list()
+ new_nsi_solutions = list()
+
+ for nst_name, recommendations in overall_recommendations.items():
+ for recommendation in recommendations:
+ nsi_set = set(values['candidate']['nsi_name'] for key, values in recommendation.items())
+ if len(nsi_set) == 1:
+ nsi = nsi_set.pop()
+ debug_log.debug("The NSSIs in the solution belongs to the same NSI {}".format(nsi))
+ shared_nsi_solution = dict()
+ shared_nsi_solution["NSIName"] = nsi
+ shared_nsi_solutions.append(shared_nsi_solution)
+ else:
+ nssi_solutions = get_nssi_solutions(recommendation)
+ new_nsi_solution = dict()
+ new_nsi_solution['matchLevel'] = ""
+ new_nsi_solution['NSTInfo'] = nst_info_map.get(nst_name)
+ new_nsi_solution['NSSISolutions'] = nssi_solutions
+ new_nsi_solutions.append(new_nsi_solution)
+
+ solutions = dict()
+ solutions['sharedNSISolutions'] = shared_nsi_solutions
+ solutions['newNSISolutions'] = new_nsi_solutions
+ return get_nsi_selection_response(request_info, solutions)
+
+
+def conductor_error_response_processor(request_info, error_message):
+ """Form response message from the error message
+ :param request_info: request info
+ :param error_message: error message while processing the request
+ :return: response json as dictionary
+ """
+ return {'requestId': request_info['requestId'],
+ 'transactionId': request_info['transactionId'],
+ 'requestStatus': 'error',
+ 'statusMessage': error_message}
+
+
+def get_nssi_solutions(recommendation):
+ """Get nssi solutions from recommendation
+ :param recommendation: recommendation from conductor
+ :return: new nssi solutions list
+ """
+ nssi_solutions = list()
+
+ for nsst_name, nsst_rec in recommendation.items():
+ candidate = nsst_rec['candidate']
+ nssi_info, slice_profile = get_solution_from_candidate(candidate)
+ nsst_info = {"NSSTName": nsst_name}
+ nssi_solution = {"sliceProfile": slice_profile,
+ "NSSTInfo": nsst_info,
+ "NSSISolution": nssi_info}
+ nssi_solutions.append(nssi_solution)
+ return nssi_solutions
+
+
+def get_solution_from_candidate(candidate):
+ """Get nssi info from candidate
+ :param candidate: Candidate from the recommendation
+ :return: nssi_info and slice profile derived from candidate
+ """
+ slice_profile = dict()
+ nssi_info = {"NSSIName": candidate['instance_name'],
+ "NSSIId": candidate['candidate_id']}
+
+ for field in SLICE_PROFILE_FIELDS:
+ if candidate[field]:
+ slice_profile[field] = candidate[field]
+
+ return nssi_info, slice_profile
+
+
+def get_nsi_selection_response(request_info, solutions):
+ """Get NSI selection response from final solution
+ :param request_info: request info
+ :param solutions: final solutions
+ :return: NSI selection response to send back as dictionary
+ """
+ return {'requestId': request_info['requestId'],
+ 'transactionId': request_info['transactionId'],
+ 'requestStatus': 'completed',
+ 'statusMessage': '',
+ 'solutions': solutions}