osm_mon/plugins/OpenStack/Aodh/notifier.py

   1 # Copyright 2017 Intel Research and Development Ireland Limited
   2 # *************************************************************
   3
   4 # This file is part of OSM Monitoring module
   5 # All Rights Reserved to Intel Corporation
   6
   7 # Licensed under the Apache License, Version 2.0 (the "License"); you may
   8 # not use this file except in compliance with the License. You may obtain
   9 # a copy of the License at
  10
  11 #         http://www.apache.org/licenses/LICENSE-2.0
  12
  13 # Unless required by applicable law or agreed to in writing, software
  14 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  15 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  16 # License for the specific language governing permissions and limitations
  17 # under the License.
  18
  19 # For those usages not covered by the Apache License, Version 2.0 please
  20 # contact: helena.mcgough@intel.com or adrian.hoban@intel.com
  21 ##
  22 # __author__ = Helena McGough
  23 #
  24 """A Webserver to send alarm notifications from Aodh to the SO."""
  25 import json
  26 import logging
  27 import os
  28 import sys
  29 import time
  30
  31 from six.moves.BaseHTTPServer import BaseHTTPRequestHandler
  32 from six.moves.BaseHTTPServer import HTTPServer
  33
  34 # Initialise a logger for alarm notifier
  35
  36 logging.basicConfig(stream=sys.stdout,
  37                     format='%(asctime)s %(message)s',
  38                     datefmt='%m/%d/%Y %I:%M:%S %p',
  39                     level=logging.INFO)
  40 log = logging.getLogger(__name__)
  41
  42 sys.path.append(os.path.abspath(os.path.join(os.path.realpath(__file__), '..', '..', '..', '..', '..')))
  43
  44 from osm_mon.core.database import DatabaseManager
  45 from osm_mon.core.message_bus.producer import KafkaProducer
  46
  47 from osm_mon.plugins.OpenStack.response import OpenStack_Response
  48 from osm_mon.core.settings import Config
  49
  50
  51 class NotifierHandler(BaseHTTPRequestHandler):
  52     """Handler class for alarm_actions triggered by OSM alarms."""
  53
  54     def _set_headers(self):
  55         """Set the headers for a request."""
  56         self.send_response(200)
  57         self.send_header('Content-type', 'text/html')
  58         self.end_headers()
  59
  60     def do_GET(self):
  61         """Get request functionality."""
  62         self._set_headers()
  63
  64     def do_POST(self):
  65         """POST request function."""
  66         # Gets header and data from the post request and records info
  67         self._set_headers()
  68         # Gets the size of data
  69         content_length = int(self.headers['Content-Length'])
  70         post_data = self.rfile.read(content_length)
  71         try:
  72             post_data = post_data.decode()
  73         except AttributeError:
  74             pass
  75         log.info("This alarm was triggered: %s", json.loads(post_data))
  76
  77         # Generate a notify_alarm response for the SO
  78         self.notify_alarm(json.loads(post_data))
  79
  80     def notify_alarm(self, values):
  81         """Send a notification response message to the SO."""
  82
  83         try:
  84             # Initialise configuration and authentication for response message
  85             config = Config.instance()
  86             config.read_environ()
  87             response = OpenStack_Response()
  88             producer = KafkaProducer('alarm_response')
  89
  90             database_manager = DatabaseManager()
  91
  92             alarm_id = values['alarm_id']
  93             alarm = database_manager.get_alarm(alarm_id, 'openstack')
  94             # Process an alarm notification if resource_id is valid
  95             # Get date and time for response message
  96             a_date = time.strftime("%d-%m-%Y") + " " + time.strftime("%X")
  97             # Try generate and send response
  98             try:
  99                 resp_message = response.generate_response(
 100                     'notify_alarm', a_id=alarm_id,
 101                     vdu_name=alarm.vdu_name,
 102                     vnf_member_index=alarm.vnf_member_index,
 103                     ns_id=alarm.ns_id,
 104                     metric_name=alarm.metric_name,
 105                     operation=alarm.operation,
 106                     threshold_value=alarm.threshold,
 107                     sev=values['severity'],
 108                     date=a_date,
 109                     state=values['current'])
 110                 producer.notify_alarm(
 111                     'notify_alarm', resp_message)
 112                 log.info("Sent an alarm response to SO: %s", resp_message)
 113             except Exception as exc:
 114                 log.exception("Couldn't notify SO of the alarm:")
 115
 116         except:
 117             log.exception("Could not notify alarm.")
 118
 119
 120 def run(server_class=HTTPServer, handler_class=NotifierHandler, port=8662):
 121     """Run the webserver application to retrieve alarm notifications."""
 122     try:
 123         server_address = ('', port)
 124         httpd = server_class(server_address, handler_class)
 125         print('Starting alarm notifier...')
 126         log.info("Starting alarm notifier server on port: %s", port)
 127         httpd.serve_forever()
 128     except Exception as exc:
 129         log.warning("Failed to start webserver, %s", exc)
 130
 131
 132 if __name__ == "__main__":
 133     from sys import argv
 134
 135     # Runs the webserver
 136     if len(argv) == 2:
 137         run(port=int(argv[1]))
 138     else:
 139         run()