tests/lib/monitors/sample/monitor.py

   1 ##############################################################################
   2 # Copyright (c) 2016 NEC Corporation and others.
   3 #
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ##############################################################################
   9
  10 import argparse
  11 from datetime import datetime
  12 import json
  13 import logger as doctor_log
  14 import requests
  15 import socket
  16 import time
  17
  18 from keystoneauth1 import session
  19 from congressclient.v1 import client
  20
  21 import identity_auth
  22
  23 # NOTE: icmp message with all zero data (checksum = 0xf7ff)
  24 #       see https://tools.ietf.org/html/rfc792
  25 ICMP_ECHO_MESSAGE = '\x08\x00\xf7\xff\x00\x00\x00\x00'
  26
  27 SUPPORTED_INSPECTOR_TYPES = ['sample', 'congress']
  28
  29 LOG = doctor_log.Logger('doctor_monitor').getLogger()
  30
  31
  32 class DoctorMonitorSample(object):
  33
  34     interval = 0.1  # second
  35     timeout = 0.1  # second
  36     event_type = "compute.host.down"
  37
  38     def __init__(self, args):
  39         if args.inspector_type not in SUPPORTED_INSPECTOR_TYPES:
  40             raise Exception("Inspector type '%s' not supported", args.inspector_type)
  41
  42         self.hostname = args.hostname
  43         self.inspector_type = args.inspector_type
  44         self.ip_addr = args.ip or socket.gethostbyname(self.hostname)
  45
  46         if self.inspector_type == 'sample':
  47             self.inspector_url = 'http://127.0.0.1:12345/events'
  48         elif self.inspector_type == 'congress':
  49             auth=identity_auth.get_identity_auth()
  50             self.session=session.Session(auth=auth)
  51             congress = client.Client(session=self.session, service_type='policy')
  52             ds = congress.list_datasources()['results']
  53             doctor_ds = next((item for item in ds if item['driver'] == 'doctor'),
  54                              None)
  55
  56             congress_endpoint = congress.httpclient.get_endpoint(auth=auth)
  57             self.inspector_url = ('%s/v1/data-sources/%s/tables/events/rows' %
  58                                   (congress_endpoint, doctor_ds['id']))
  59
  60     def start_loop(self):
  61         LOG.debug("start ping to host %(h)s (ip=%(i)s)" % {'h': self.hostname,
  62                                                        'i': self.ip_addr})
  63         sock = socket.socket(socket.AF_INET, socket.SOCK_RAW,
  64                              socket.IPPROTO_ICMP)
  65         sock.settimeout(self.timeout)
  66         while True:
  67             try:
  68                 sock.sendto(ICMP_ECHO_MESSAGE, (self.ip_addr, 0))
  69                 data = sock.recv(4096)
  70             except socket.timeout:
  71                 LOG.info("doctor monitor detected at %s" % time.time())
  72                 self.report_error()
  73                 LOG.info("ping timeout, quit monitoring...")
  74                 return
  75             time.sleep(self.interval)
  76
  77     def report_error(self):
  78         payload = [
  79             {
  80                 'id': 'monitor_sample_id1',
  81                 'time': datetime.now().isoformat(),
  82                 'type': self.event_type,
  83                 'details': {
  84                     'hostname': self.hostname,
  85                     'status': 'down',
  86                     'monitor': 'monitor_sample',
  87                     'monitor_event_id': 'monitor_sample_event1'
  88                 },
  89             },
  90         ]
  91         data = json.dumps(payload)
  92
  93         if self.inspector_type == 'sample':
  94             headers = {'content-type': 'application/json'}
  95             requests.post(self.inspector_url, data=data, headers=headers)
  96         elif self.inspector_type == 'congress':
  97             headers = {
  98                 'Content-Type': 'application/json',
  99                 'Accept': 'application/json',
 100                 'X-Auth-Token':self.session.get_token(),
 101             }
 102             requests.put(self.inspector_url, data=data, headers=headers)
 103
 104
 105 def get_args():
 106     parser = argparse.ArgumentParser(description='Doctor Sample Monitor')
 107     parser.add_argument('hostname', metavar='HOSTNAME', type=str, nargs='?',
 108                         help='a hostname to monitor connectivity')
 109     parser.add_argument('ip', metavar='IP', type=str, nargs='?',
 110                         help='an IP address to monitor connectivity')
 111     parser.add_argument('inspector_type', metavar='INSPECTOR_TYPE', type=str, nargs='?',
 112                         help='inspector to report',
 113                         default='sample')
 114     return parser.parse_args()
 115
 116
 117 def main():
 118     args = get_args()
 119     monitor = DoctorMonitorSample(args)
 120     monitor.start_loop()
 121
 122
 123 if __name__ == '__main__':
 124     main()