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
  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         for nst_info in request_json["NSTInfoList"]:
  50             nst_name = nst_info["modelName"]
  51             nst_info_map["nst_name"] = {"NSTName": nst_name,
  52                                         "UUID": nst_info["modelVersionId"],
  53                                         "invariantUUID": nst_info["modelInvariantId"]}
  54
  55             policy_request_json = request_json.copy()
  56             policy_request_json['serviceInfo']['serviceName'] = nst_name
  57
  58             policies = get_policies(policy_request_json, "slice_selection")
  59
  60             demands = get_slice_demands(nst_name, policies, osdf_config.core)
  61
  62             request_parameters = {}
  63             service_info = {}
  64             req_info['numSolutions'] = 'all'
  65             resp = conductor.request(req_info, demands, request_parameters, service_info, False,
  66                                      osdf_config, policies)
  67             debug_log.debug("Response from conductor {}".format(str(resp)))
  68             overall_recommendations[nst_name] = resp["plans"][0].get("recommendations")
  69
  70         return conductor_response_processor(overall_recommendations, nst_info_map, req_info)
  71
  72     except Exception as ex:
  73         error_log.error("Error for {} {}".format(req_info.get('requestId'),
  74                                                  traceback.format_exc()))
  75         if isinstance(ex, RequestException):
  76             try:
  77                 error_message = json.loads(ex.response)['plans'][0]['message']
  78             except Exception:
  79                 error_message = "Problem connecting to conductor"
  80         else:
  81             error_message = str(ex)
  82         return conductor_error_response_processor(req_info, error_message)
  83
  84
  85 def get_slice_demands(model_name, policies, config):
  86     """
  87     :param model_name: model name of the slice
  88     :param policies: flattened polcies corresponding to the request
  89     :param config: configuration specific to OSDF app
  90     :return: list of demands for the request
  91     """
  92     group_policies = group_policies_gen(policies, config)
  93     subscriber_policy_list = group_policies["onap.policies.optimization.SubscriberPolicy"]
  94     slice_demands = list()
  95     for subscriber_policy in subscriber_policy_list:
  96         policy_properties = subscriber_policy[list(subscriber_policy.keys())[0]]['properties']
  97         if model_name in policy_properties["services"]:
  98             subnet_attributes = policy_properties["properties"]["subscriberRole"][0]
  99             for subnet in policy_properties["properties"]["subscriberName"]:
 100                 slice_demand = dict()
 101                 slice_demand["resourceModuleName"] = subnet
 102                 slice_demand['resourceModelInfo'] = subnet_attributes[subnet]
 103                 slice_demands.append(slice_demand)
 104     return slice_demands