policy_module/osm_policy_module/common/mon_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 import random
  27 import uuid
  28
  29 from kafka import KafkaProducer, KafkaConsumer
  30
  31 from osm_policy_module.core.config import Config
  32
  33 log = logging.getLogger(__name__)
  34
  35
  36 class MonClient:
  37     def __init__(self):
  38         cfg = Config.instance()
  39         self.kafka_server = '{}:{}'.format(cfg.get('policy_module', 'kafka_server_host'),
  40                                            cfg.get('policy_module', 'kafka_server_port'))
  41         self.producer = KafkaProducer(bootstrap_servers=self.kafka_server,
  42                                       key_serializer=str.encode,
  43                                       value_serializer=str.encode)
  44
  45     def create_alarm(self, metric_name, resource_uuid, vim_uuid, threshold, statistic, operation):
  46         cor_id = random.randint(1, 1000000)
  47         msg = self._create_alarm_payload(cor_id, metric_name, resource_uuid, vim_uuid, threshold, statistic, operation)
  48         log.info("Sending create_alarm_request %s", msg)
  49         future = self.producer.send(topic='alarm_request', key='create_alarm_request', value=json.dumps(msg))
  50         future.get(timeout=60)
  51         consumer = KafkaConsumer(bootstrap_servers=self.kafka_server,
  52                                  key_deserializer=bytes.decode,
  53                                  value_deserializer=bytes.decode)
  54         consumer.subscribe(['alarm_response'])
  55         for message in consumer:
  56             if message.key == 'create_alarm_response':
  57                 content = json.loads(message.value)
  58                 log.info("Received create_alarm_response %s", content)
  59                 if self._is_alarm_response_correlation_id_eq(cor_id, content):
  60                     alarm_uuid = content['alarm_create_response']['alarm_uuid']
  61                     # TODO Handle error response
  62                     return alarm_uuid
  63
  64         raise ValueError('Timeout: No alarm creation response from MON. Is MON up?')
  65
  66     def _create_alarm_payload(self, cor_id, metric_name, resource_uuid, vim_uuid, threshold, statistic, operation):
  67         alarm_create_request = {
  68             'correlation_id': cor_id,
  69             'alarm_name': str(uuid.uuid4()),
  70             'metric_name': metric_name,
  71             'resource_uuid': resource_uuid,
  72             'operation': operation,
  73             'severity': 'critical',
  74             'threshold_value': threshold,
  75             'statistic': statistic
  76         }
  77         msg = {
  78             'alarm_create_request': alarm_create_request,
  79             'vim_uuid': vim_uuid
  80         }
  81         return msg
  82
  83     def _is_alarm_response_correlation_id_eq(self, cor_id, message_content):
  84         return message_content['alarm_create_response']['correlation_id'] == cor_id