osm_mon/core/message_bus/common_consumer.py

   1 # Copyright 2017 Intel Research and Development Ireland Limited
   2 # *************************************************************
   3 # This file is part of OSM Monitoring module
   4 # All Rights Reserved to Intel Corporation
   5 #
   6 # Licensed under the Apache License, Version 2.0 (the "License"); you
   7 # may not use this file except in compliance with the License. You may
   8 # obtain a copy of the License at
   9 #
  10 #         http://www.apache.org/licenses/LICENSE-2.0
  11 #
  12 # Unless required by applicable law or agreed to in writing, software
  13 # distributed under the License is distributed on an "AS IS" BASIS,
  14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  15 # implied. See the License for the specific language governing
  16 # permissions and limitations under the License.
  17 #
  18 # For those usages not covered by the Apache License, Version 2.0 please
  19 # contact: helena.mcgough@intel.com or adrian.hoban@intel.com
  20 """A common KafkaConsumer for all MON plugins."""
  21
  22 import json
  23 import logging
  24 import sys
  25 import time
  26 from json import JSONDecodeError
  27
  28 import six
  29 import yaml
  30
  31 from osm_mon.common.common_db_client import CommonDbClient
  32 from osm_mon.core.auth import AuthManager
  33 from osm_mon.core.database import DatabaseManager
  34 from osm_mon.core.message_bus.consumer import Consumer
  35 from osm_mon.core.message_bus.producer import Producer
  36 from osm_mon.core.settings import Config
  37 from osm_mon.plugins.CloudWatch.access_credentials import AccessCredentials
  38 from osm_mon.plugins.CloudWatch.connection import Connection
  39 from osm_mon.plugins.CloudWatch.plugin_alarm import plugin_alarms
  40 from osm_mon.plugins.CloudWatch.plugin_metric import plugin_metrics
  41 from osm_mon.plugins.OpenStack.Aodh import alarm_handler
  42 from osm_mon.plugins.OpenStack.Gnocchi import metric_handler
  43 from osm_mon.plugins.vRealiseOps import plugin_receiver
  44
  45 cfg = Config.instance()
  46
  47 logging.basicConfig(stream=sys.stdout,
  48                     format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
  49                     datefmt='%m/%d/%Y %I:%M:%S %p',
  50                     level=logging.getLevelName(cfg.OSMMON_LOG_LEVEL))
  51 log = logging.getLogger(__name__)
  52
  53 kafka_logger = logging.getLogger('kafka')
  54 kafka_logger.setLevel(logging.getLevelName(cfg.OSMMON_KAFKA_LOG_LEVEL))
  55
  56
  57 class CommonConsumer:
  58
  59     def __init__(self):
  60         self.auth_manager = AuthManager()
  61         self.database_manager = DatabaseManager()
  62         self.database_manager.create_tables()
  63
  64         # Create OpenStack alarming and metric instances
  65         self.openstack_metrics = metric_handler.OpenstackMetricHandler()
  66         self.openstack_alarms = alarm_handler.OpenstackAlarmHandler()
  67
  68         # Create CloudWatch alarm and metric instances
  69         self.cloudwatch_alarms = plugin_alarms()
  70         self.cloudwatch_metrics = plugin_metrics()
  71         self.aws_connection = Connection()
  72         self.aws_access_credentials = AccessCredentials()
  73
  74         # Create vROps plugin_receiver class instance
  75         self.vrops_rcvr = plugin_receiver.PluginReceiver()
  76
  77         log.info("Connecting to MongoDB...")
  78         self.common_db = CommonDbClient()
  79         log.info("Connection successful.")
  80
  81     def get_vim_type(self, vim_uuid):
  82         """Get the vim type that is required by the message."""
  83         credentials = self.database_manager.get_credentials(vim_uuid)
  84         return credentials.type
  85
  86     def run(self):
  87         common_consumer = Consumer("mon-consumer")
  88
  89         topics = ['metric_request', 'alarm_request', 'vim_account']
  90         common_consumer.subscribe(topics)
  91         retries = 1
  92         max_retries = 5
  93         while True:
  94             try:
  95                 common_consumer.poll()
  96                 common_consumer.seek_to_end()
  97                 break
  98             except Exception:
  99                 log.error("Error getting Kafka partitions. Maybe Kafka is not ready yet.")
 100                 log.error("Retry number %d of %d", retries, max_retries)
 101                 if retries >= max_retries:
 102                     log.error("Achieved max number of retries. Logging exception and exiting...")
 103                     log.exception("Exception: ")
 104                     return
 105                 retries = retries + 1
 106                 time.sleep(2)
 107
 108         log.info("Listening for messages...")
 109         for message in common_consumer:
 110             self.consume_message(message)
 111
 112     def consume_message(self, message):
 113         log.info("Message arrived: %s", message)
 114         try:
 115             try:
 116                 values = json.loads(message.value)
 117             except JSONDecodeError:
 118                 values = yaml.safe_load(message.value)
 119
 120             response = None
 121
 122             if message.topic == "vim_account":
 123                 if message.key == "create" or message.key == "edit":
 124                     self.auth_manager.store_auth_credentials(values)
 125                 if message.key == "delete":
 126                     self.auth_manager.delete_auth_credentials(values)
 127
 128             else:
 129                 # Get ns_id from message
 130                 # TODO: Standardize all message models to avoid the need of figuring out where are certain fields
 131                 contains_list = False
 132                 list_index = None
 133                 for k, v in six.iteritems(values):
 134                     if isinstance(v, dict):
 135                         if 'ns_id' in v:
 136                             contains_list = True
 137                             list_index = k
 138                             break
 139                 if not contains_list and 'ns_id' in values:
 140                     ns_id = values['ns_id']
 141                 else:
 142                     ns_id = values[list_index]['ns_id']
 143
 144                 vnf_index = values[list_index]['vnf_member_index'] if contains_list else values['vnf_member_index']
 145
 146                 # Check the vim desired by the message
 147                 vnfr = self.common_db.get_vnfr(ns_id, vnf_index)
 148                 vim_uuid = vnfr['vim-account-id']
 149
 150                 if (contains_list and 'vdu_name' in values[list_index]) or 'vdu_name' in values:
 151                     vdu_name = values[list_index]['vdu_name'] if contains_list else values['vdu_name']
 152                     vdur = self.common_db.get_vdur(ns_id, vnf_index, vdu_name)
 153                     if contains_list:
 154                         values[list_index]['resource_uuid'] = vdur['vim-id']
 155                     else:
 156                         values['resource_uuid'] = vdur['vim-id']
 157                     message = message._replace(value=json.dumps(values))
 158
 159                 vim_type = self.get_vim_type(vim_uuid)
 160
 161                 if vim_type == "openstack":
 162                     log.info("This message is for the OpenStack plugin.")
 163                     if message.topic == "metric_request":
 164                         response = self.openstack_metrics.handle_request(message.key, values, vim_uuid)
 165                     if message.topic == "alarm_request":
 166                         response = self.openstack_alarms.handle_message(message.key, values, vim_uuid)
 167
 168                 elif vim_type == "aws":
 169                     log.info("This message is for the CloudWatch plugin.")
 170                     aws_conn = self.aws_connection.setEnvironment()
 171                     if message.topic == "metric_request":
 172                         response = self.cloudwatch_metrics.metric_calls(message.key, values, aws_conn)
 173                     if message.topic == "alarm_request":
 174                         response = self.cloudwatch_alarms.alarm_calls(message.key, values, aws_conn)
 175
 176                 elif vim_type == "vmware":
 177                     log.info("This metric_request message is for the vROPs plugin.")
 178                     if message.topic == "metric_request":
 179                         response = self.vrops_rcvr.handle_metric_requests(message.key, values, vim_uuid)
 180                     if message.topic == "alarm_request":
 181                         response = self.vrops_rcvr.handle_alarm_requests(message.key, values, vim_uuid)
 182
 183                 else:
 184                     log.debug("vim_type is misconfigured or unsupported; %s",
 185                               vim_type)
 186             if response:
 187                 self._publish_response(message.topic, message.key, response)
 188
 189         except Exception:
 190             log.exception("Exception processing message: ")
 191
 192     def _publish_response(self, topic: str, key: str, msg: dict):
 193         topic = topic.replace('request', 'response')
 194         key = key.replace('request', 'response')
 195         producer = Producer()
 196         producer.send(topic=topic, key=key, value=json.dumps(msg))
 197         producer.flush(timeout=5)
 198         producer.close()
 199
 200
 201 if __name__ == '__main__':
 202     CommonConsumer().run()