policy_module/osm_policy_module/common/lcm_client.py

   1 # -*- coding: utf-8 -*-
   2
   3 # Copyright 2018 Whitestack, LLC
   4 # *************************************************************
   5
   6 # This file is part of OSM Monitoring module
   7 # All Rights Reserved to Whitestack, LLC
   8
   9 # Licensed under the Apache License, Version 2.0 (the "License"); you may
  10 # not use this file except in compliance with the License. You may obtain
  11 # a copy of the License at
  12
  13 #         http://www.apache.org/licenses/LICENSE-2.0
  14
  15 # Unless required by applicable law or agreed to in writing, software
  16 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  17 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  18 # License for the specific language governing permissions and limitations
  19 # under the License.
  20
  21 # For those usages not covered by the Apache License, Version 2.0 please
  22 # contact: bdiaz@whitestack.com or glavado@whitestack.com
  23 ##
  24 import json
  25 import logging
  26
  27 from kafka import KafkaProducer
  28
  29 from osm_policy_module.core.config import Config
  30
  31 log = logging.getLogger(__name__)
  32
  33
  34 class LcmClient:
  35     def __init__(self):
  36         cfg = Config.instance()
  37         self.kafka_server = '{}:{}'.format(cfg.get('policy_module', 'kafka_server_host'),
  38                                            cfg.get('policy_module', 'kafka_server_port'))
  39         self.producer = KafkaProducer(bootstrap_servers=self.kafka_server,
  40                                       key_serializer=str.encode,
  41                                       value_serializer=str.encode)
  42
  43     def scale(self, nsr_id: str, name: str, action: str):
  44         msg = self._create_scale_action_payload(nsr_id, name, action)
  45         log.info("Sending scale action message: %s", json.dumps(msg))
  46         self.producer.send(topic='lcm_pm', key='trigger_scaling', value=json.dumps(msg))
  47         self.producer.flush()
  48
  49     def _create_scale_action_payload(self, nsr_id: str, name: str, action: str):
  50         msg = {
  51             "ns_id": nsr_id,
  52             "scaling_group_descriptor": {
  53                 "name": name,
  54                 "action": action
  55             }
  56         }
  57         return msg