tests/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 os
  15 import requests
  16 import socket
  17 import sys
  18 import time
  19
  20 from congressclient.v1 import client
  21 from keystoneclient import session as ksc_session
  22 from keystoneclient.auth.identity import v2
  23
  24 # NOTE: icmp message with all zero data (checksum = 0xf7ff)
  25 #       see https://tools.ietf.org/html/rfc792
  26 ICMP_ECHO_MESSAGE = '\x08\x00\xf7\xff\x00\x00\x00\x00'
  27
  28 SUPPORTED_INSPECTOR_TYPES = ['sample', 'congress']
  29
  30 LOG = doctor_log.Logger('doctor_monitor').getLogger()
  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 = v2.Password(auth_url=os.environ['OS_AUTH_URL'],
  50                                username=os.environ['OS_USERNAME'],
  51                                password=os.environ['OS_PASSWORD'],
  52                                tenant_name=os.environ['OS_TENANT_NAME'])
  53             self.session = ksc_session.Session(auth=auth)
  54
  55             congress = client.Client(session=self.session, service_type='policy')
  56             ds = congress.list_datasources()['results']
  57             doctor_ds = next((item for item in ds if item['driver'] == 'doctor'),
  58                              None)
  59
  60             congress_endpoint = congress.httpclient.get_endpoint(auth=auth)
  61             self.inspector_url = ('%s/v1/data-sources/%s/tables/events/rows' %
  62                                   (congress_endpoint, doctor_ds['id']))
  63
  64     def start_loop(self):
  65         LOG.debug("start ping to host %(h)s (ip=%(i)s)" % {'h': self.hostname,
  66                                                        'i': self.ip_addr})
  67         sock = socket.socket(socket.AF_INET, socket.SOCK_RAW,
  68                              socket.IPPROTO_ICMP)
  69         sock.settimeout(self.timeout)
  70         while True:
  71             try:
  72                 sock.sendto(ICMP_ECHO_MESSAGE, (self.ip_addr, 0))
  73                 data = sock.recv(4096)
  74             except socket.timeout:
  75                 LOG.info("doctor monitor detected at %s" % time.time())
  76                 self.report_error()
  77                 LOG.info("ping timeout, quit monitoring...")
  78                 return
  79             time.sleep(self.interval)
  80
  81     def report_error(self):
  82         payload = [
  83             {
  84                 'id': 'monitor_sample_id1',
  85                 'time': datetime.now().isoformat(),
  86                 'type': self.event_type,
  87                 'details': {
  88                     'hostname': self.hostname,
  89                     'status': 'down',
  90                     'monitor': 'monitor_sample',
  91                     'monitor_event_id': 'monitor_sample_event1'
  92                 },
  93             },
  94         ]
  95         data = json.dumps(payload)
  96
  97         if self.inspector_type == 'sample':
  98             headers = {'content-type': 'application/json'}
  99             requests.post(self.inspector_url, data=data, headers=headers)
 100         elif self.inspector_type == 'congress':
 101             headers = {
 102                 'Content-Type': 'application/json',
 103                 'Accept': 'application/json',
 104                 'X-Auth-Token':self.session.get_token(),
 105             }
 106             requests.put(self.inspector_url, data=data, headers=headers)
 107
 108
 109 def get_args():
 110     parser = argparse.ArgumentParser(description='Doctor Sample Monitor')
 111     parser.add_argument('hostname', metavar='HOSTNAME', type=str, nargs='?',
 112                         help='a hostname to monitor connectivity')
 113     parser.add_argument('ip', metavar='IP', type=str, nargs='?',
 114                         help='an IP address to monitor connectivity')
 115     parser.add_argument('inspector_type', metavar='INSPECTOR_TYPE', type=str, nargs='?',
 116                         help='inspector to report',
 117                         default='sample')
 118     return parser.parse_args()
 119
 120
 121 def main():
 122     args = get_args()
 123     monitor = DoctorMonitorSample(args)
 124     monitor.start_loop()
 125
 126
 127 if __name__ == '__main__':
 128     main()