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.common import Common
  48 from osm_mon.plugins.OpenStack.response import OpenStack_Response
  49 from osm_mon.core.settings import Config
  50
  51
  52 class NotifierHandler(BaseHTTPRequestHandler):
  53     """Handler class for alarm_actions triggered by OSM alarms."""
  54
  55     def _set_headers(self):
  56         """Set the headers for a request."""
  57         self.send_response(200)
  58         self.send_header('Content-type', 'text/html')
  59         self.end_headers()
  60
  61     def do_GET(self):
  62         """Get request functionality."""
  63         self._set_headers()
  64
  65     def do_POST(self):
  66         """POST request function."""
  67         # Gets header and data from the post request and records info
  68         self._set_headers()
  69         # Gets the size of data
  70         content_length = int(self.headers['Content-Length'])
  71         post_data = self.rfile.read(content_length)
  72         try:
  73             post_data = post_data.decode()
  74         except AttributeError:
  75             pass
  76         log.info("This alarm was triggered: %s", json.loads(post_data))
  77
  78         # Generate a notify_alarm response for the SO
  79         self.notify_alarm(json.loads(post_data))
  80
  81     def notify_alarm(self, values):
  82         """Send a notification response message to the SO."""
  83
  84         try:
  85             # Initialise configuration and authentication for response message
  86             config = Config.instance()
  87             config.read_environ()
  88             response = OpenStack_Response()
  89             producer = KafkaProducer('alarm_response')
  90
  91             database_manager = DatabaseManager()
  92
  93             alarm_id = values['alarm_id']
  94             # Get vim_uuid associated to alarm
  95             creds = database_manager.get_credentials_for_alarm_id(alarm_id, 'openstack')
  96             auth_token = Common.get_auth_token(creds.uuid)
  97             endpoint = Common.get_endpoint("alarming", creds.uuid)
  98
  99             # If authenticated generate and send response message
 100             if auth_token is not None and endpoint is not None:
 101                 url = "{}/v2/alarms/%s".format(endpoint) % alarm_id
 102
 103                 # Get the resource_id of the triggered alarm
 104                 result = Common.perform_request(
 105                     url, auth_token, req_type="get")
 106                 alarm_details = json.loads(result.text)
 107                 gnocchi_rule = alarm_details['gnocchi_resources_threshold_rule']
 108                 resource_id = gnocchi_rule['resource_id']
 109
 110                 # Process an alarm notification if resource_id is valid
 111                 if resource_id is not None:
 112                     # Get date and time for response message
 113                     a_date = time.strftime("%d-%m-%Y") + " " + time.strftime("%X")
 114                     # Try generate and send response
 115                     try:
 116                         resp_message = response.generate_response(
 117                             'notify_alarm', a_id=alarm_id,
 118                             r_id=resource_id,
 119                             sev=values['severity'], date=a_date,
 120                             state=values['current'], vim_type="openstack")
 121                         producer.notify_alarm(
 122                             'notify_alarm', resp_message)
 123                         log.info("Sent an alarm response to SO: %s", resp_message)
 124                     except Exception as exc:
 125                         log.exception("Couldn't notify SO of the alarm:")
 126                 else:
 127                     log.warning("No resource_id for alarm; no SO response sent.")
 128             else:
 129                 log.warning("Authentication failure; SO notification not sent.")
 130         except:
 131             log.exception("Could not notify alarm.")
 132
 133
 134 def run(server_class=HTTPServer, handler_class=NotifierHandler, port=8662):
 135     """Run the webserver application to retrieve alarm notifications."""
 136     try:
 137         server_address = ('', port)
 138         httpd = server_class(server_address, handler_class)
 139         print('Starting alarm notifier...')
 140         log.info("Starting alarm notifier server on port: %s", port)
 141         httpd.serve_forever()
 142     except Exception as exc:
 143         log.warning("Failed to start webserver, %s", exc)
 144
 145
 146 if __name__ == "__main__":
 147     from sys import argv
 148
 149     # Runs the webserver
 150     if len(argv) == 2:
 151         run(port=int(argv[1]))
 152     else:
 153         run()