apps/slice_selection/optimizers/conductor/remote_opt_processor.py

   1 # -------------------------------------------------------------------------
   2 #   Copyright (C) 2020 Wipro Limited.
   3 #
   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
   7 #
   8 #       http://www.apache.org/licenses/LICENSE-2.0
   9 #
  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.
  15 #
  16 # -------------------------------------------------------------------------
  17 #
  18
  19 """
  20 Module for processing slice selection request
  21 """
  22
  23 import json
  24 import traceback
  25 from requests import RequestException
  26
  27 from apps.slice_selection.optimizers.conductor.response_processor \
  28     import conductor_response_processor, conductor_error_response_processor, solution_with_only_slice_profile, get_nsi_selection_response
  29 from osdf.adapters.conductor import conductor
  30 from osdf.adapters.policy.interface import get_policies
  31 from osdf.adapters.policy.utils import group_policies_gen
  32 from osdf.logging.osdf_logging import error_log, debug_log
  33 from osdf.utils.mdc_utils import mdc_from_json
  34
  35
  36 def process_nsi_selection_opt(request_json, osdf_config):
  37     """Process the nsi selection request from API layer
  38         :param request_json: api request
  39         :param policies: flattened policies corresponding to this request
  40         :param osdf_config: configuration specific to OSDF app
  41         :return: response as a dictionary
  42         """
  43     req_info = request_json['requestInfo']
  44     try:
  45         mdc_from_json(request_json)
  46
  47         overall_recommendations = dict()
  48         nst_info_map = dict()
  49         new_nsi_solutions = list()
  50         for nst_info in request_json["NSTInfoList"]:
  51             nst_name = nst_info["modelName"]
  52             nst_info_map[nst_name] =  {"NSTName": nst_name,
  53                                                     "UUID": nst_info["modelVersionId"],
  54                                                     "invariantUUID": nst_info["modelInvariantId"]}
  55
  56             if request_json["serviceProfile"]["resourceSharingLevel"] == "non-shared":
  57                 new_nsi_solution = solution_with_only_slice_profile(request_json['serviceProfile'], nst_info_map.get(nst_name))
  58                 new_nsi_solutions.append(new_nsi_solution)
  59             else:
  60                 policy_request_json = request_json.copy()
  61                 policy_request_json['serviceInfo']['serviceName'] = nst_name
  62                 policies = get_policies(policy_request_json, "slice_selection")
  63
  64                 demands = get_slice_demands(nst_name, policies, osdf_config.core)
  65
  66                 request_parameters = request_json.get('serviceProfile',{})
  67                 service_info = {}
  68                 req_info['numSolutions'] = 'all'
  69                 try:
  70                     resp = conductor.request(req_info, demands, request_parameters, service_info, False,
  71                                              osdf_config, policies)
  72                 except RequestException as e:
  73                     resp = e.response.json()
  74                     error = resp['plans'][0]['message']
  75                     error_log.error('Error from conductor {}'.format(error))
  76                 debug_log.debug("Response from conductor {}".format(str(resp)))
  77                 overall_recommendations[nst_name] = resp["plans"][0].get("recommendations")
  78
  79         if request_json["serviceProfile"]["resourceSharingLevel"] == "non-shared":
  80             solutions = dict()
  81             solutions['newNSISolutions'] = new_nsi_solutions
  82             solutions['sharedNSISolutions'] = []
  83             return get_nsi_selection_response(req_info, solutions)
  84         else:
  85             return conductor_response_processor(overall_recommendations, nst_info_map, req_info, request_json["serviceProfile"])
  86     except Exception as ex:
  87         error_log.error("Error for {} {}".format(req_info.get('requestId'),
  88                                                  traceback.format_exc()))
  89         error_message = str(ex)
  90         return conductor_error_response_processor(req_info, error_message)
  91
  92
  93 def get_slice_demands(model_name, policies, config):
  94     """
  95     :param model_name: model name of the slice
  96     :param policies: flattened polcies corresponding to the request
  97     :param config: configuration specific to OSDF app
  98     :return: list of demands for the request
  99     """
 100     group_policies = group_policies_gen(policies, config)
 101     subscriber_policy_list = group_policies["onap.policies.optimization.service.SubscriberPolicy"]
 102     slice_demands = list()
 103     for subscriber_policy in subscriber_policy_list:
 104         policy_properties = subscriber_policy[list(subscriber_policy.keys())[0]]['properties']
 105         if model_name in policy_properties["services"]:
 106             for subnet in policy_properties["properties"]["subscriberName"]:
 107                 slice_demand = dict()
 108                 slice_demand["resourceModuleName"] = subnet
 109                 slice_demand['resourceModelInfo'] = {}
 110                 slice_demands.append(slice_demand)
 111     return slice_demands