osm_policy_module/core/agent.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 asyncio
  25 import logging
  26 from pathlib import Path
  27 import os
  28
  29 import peewee
  30
  31 from osm_policy_module.alarming.service import AlarmingService
  32 from osm_policy_module.autoscaling.service import AutoscalingService
  33 from osm_policy_module.common.common_db_client import CommonDbClient
  34 from osm_policy_module.common.message_bus_client import MessageBusClient
  35 from osm_policy_module.core.config import Config
  36
  37 log = logging.getLogger(__name__)
  38
  39 ALLOWED_KAFKA_KEYS = ['instantiated', 'scaled', 'terminated', 'notify_alarm']
  40
  41
  42 class PolicyModuleAgent:
  43     def __init__(self, config: Config, loop=None):
  44         self.conf = config
  45         if not loop:
  46             loop = asyncio.get_event_loop()
  47         self.loop = loop
  48         self.msg_bus = MessageBusClient(config)
  49         self.db_client = CommonDbClient(config)
  50         self.autoscaling_service = AutoscalingService(config, loop)
  51         self.alarming_service = AlarmingService(config, loop)
  52
  53     def run(self):
  54         self.loop.run_until_complete(self.start())
  55
  56     async def start(self):
  57         Path('/tmp/osm_pol_agent_health_flag').touch()
  58         topics = [
  59             "ns",
  60             "alarm_response"
  61         ]
  62         await self.msg_bus.aioread(topics, self._process_msg)
  63         log.critical("Exiting...")
  64         if os.path.exists('/tmp/osm_pol_agent_health_flag'):
  65             os.remove('/tmp/osm_pol_agent_health_flag')
  66
  67     async def _process_msg(self, topic, key, msg):
  68         Path('/tmp/osm_pol_agent_health_flag').touch()
  69         log.debug("_process_msg topic=%s key=%s msg=%s", topic, key, msg)
  70         try:
  71             if key in ALLOWED_KAFKA_KEYS:
  72
  73                 if key == 'instantiated':
  74                     await self._handle_instantiated(msg)
  75
  76                 if key == 'scaled':
  77                     await self._handle_scaled(msg)
  78
  79                 if key == 'terminated':
  80                     await self._handle_terminated(msg)
  81
  82                 if key == 'notify_alarm':
  83                     await self._handle_alarm_notification(msg)
  84             else:
  85                 log.debug("Key %s is not in ALLOWED_KAFKA_KEYS", key)
  86         except peewee.PeeweeException:
  87             log.exception("Database error consuming message: ")
  88             raise
  89         except Exception:
  90             log.exception("Error consuming message: ")
  91
  92     async def _handle_alarm_notification(self, content):
  93         log.debug("_handle_alarm_notification: %s", content)
  94         alarm_uuid = content['notify_details']['alarm_uuid']
  95         status = content['notify_details']['status']
  96         await self.autoscaling_service.handle_alarm(alarm_uuid, status)
  97         await self.alarming_service.handle_alarm(alarm_uuid, status, content)
  98
  99     async def _handle_instantiated(self, content):
 100         log.debug("_handle_instantiated: %s", content)
 101         nslcmop_id = content['nslcmop_id']
 102         nslcmop = self.db_client.get_nslcmop(nslcmop_id)
 103         if nslcmop['operationState'] == 'COMPLETED' or nslcmop['operationState'] == 'PARTIALLY_COMPLETED':
 104             nsr_id = nslcmop['nsInstanceId']
 105             log.info("Configuring nsr_id: %s", nsr_id)
 106             await self.autoscaling_service.configure_scaling_groups(nsr_id)
 107             await self.alarming_service.configure_vnf_alarms(nsr_id)
 108         else:
 109             log.info(
 110                 "Network_service is not in COMPLETED or PARTIALLY_COMPLETED state. "
 111                 "Current state is %s. Skipping...",
 112                 nslcmop['operationState'])
 113
 114     async def _handle_scaled(self, content):
 115         log.debug("_handle_scaled: %s", content)
 116         nslcmop_id = content['nslcmop_id']
 117         nslcmop = self.db_client.get_nslcmop(nslcmop_id)
 118         if nslcmop['operationState'] == 'COMPLETED' or nslcmop['operationState'] == 'PARTIALLY_COMPLETED':
 119             nsr_id = nslcmop['nsInstanceId']
 120             log.info("Configuring scaled service with nsr_id: %s", nsr_id)
 121             await self.autoscaling_service.configure_scaling_groups(nsr_id)
 122             await self.autoscaling_service.delete_orphaned_alarms(nsr_id)
 123             await self.alarming_service.configure_vnf_alarms(nsr_id)
 124         else:
 125             log.debug(
 126                 "Network service is not in COMPLETED or PARTIALLY_COMPLETED state. "
 127                 "Current state is %s. Skipping...",
 128                 nslcmop['operationState'])
 129
 130     async def _handle_terminated(self, content):
 131         log.debug("_handle_deleted: %s", content)
 132         nsr_id = content['nsr_id']
 133         if content['operationState'] == 'COMPLETED' or content['operationState'] == 'PARTIALLY_COMPLETED':
 134             log.info("Deleting scaling groups and alarms for network autoscaling_service with nsr_id: %s", nsr_id)
 135             await self.autoscaling_service.delete_scaling_groups(nsr_id)
 136             await self.alarming_service.delete_vnf_alarms(nsr_id)
 137         else:
 138             log.info(
 139                 "Network service is not in COMPLETED or PARTIALLY_COMPLETED state. "
 140                 "Current state is %s. Skipping...",
 141                 content['operationState'])