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_url = args.inspector_url
  44         self.inspector_type = args.inspector_type
  45         self.ip_addr = args.ip or socket.gethostbyname(self.hostname)
  46
  47         if self.inspector_type == 'congress':
  48             auth = v2.Password(auth_url=os.environ['OS_AUTH_URL'],
  49                                username=os.environ['OS_USERNAME'],
  50                                password=os.environ['OS_PASSWORD'],
  51                                tenant_name=os.environ['OS_TENANT_NAME'])
  52             self.session = ksc_session.Session(auth=auth)
  53
  54             congress = client.Client(session=self.session, service_type='policy')
  55             ds = congress.list_datasources()['results']
  56             doctor_ds = next((item for item in ds if item['driver'] == 'doctor'),
  57                              None)
  58
  59             congress_endpoint = congress.httpclient.get_endpoint(auth=auth)
  60             self.inspector_url = ('%s/v1/data-sources/%s/tables/events/rows' %
  61                                   (congress_endpoint, doctor_ds['id']))
  62
  63     def start_loop(self):
  64         LOG.debug("start ping to host %(h)s (ip=%(i)s)" % {'h': self.hostname,
  65                                                        'i': self.ip_addr})
  66         sock = socket.socket(socket.AF_INET, socket.SOCK_RAW,
  67                              socket.IPPROTO_ICMP)
  68         sock.settimeout(self.timeout)
  69         while True:
  70             try:
  71                 sock.sendto(ICMP_ECHO_MESSAGE, (self.ip_addr, 0))
  72                 data = sock.recv(4096)
  73             except socket.timeout:
  74                 LOG.info("doctor monitor detected at %s" % time.time())
  75                 self.report_error()
  76                 LOG.info("ping timeout, quit monitoring...")
  77                 return
  78             time.sleep(self.interval)
  79
  80     def report_error(self):
  81         if self.inspector_type == 'sample':
  82             payload = {"type": self.event_type, "hostname": self.hostname}
  83             data = json.dumps(payload)
  84             headers = {'content-type': 'application/json'}
  85             requests.post(self.inspector_url, data=data, headers=headers)
  86         elif self.inspector_type == 'congress':
  87             data = [
  88                 {
  89                     'id': 'monitor_sample_id1',
  90                     'time': datetime.now().isoformat(),
  91                     'type': self.event_type,
  92                     'details': {
  93                         'hostname': self.hostname,
  94                         'status': 'down',
  95                         'monitor': 'monitor_sample',
  96                         'monitor_event_id': 'monitor_sample_event1'
  97                     },
  98                 },
  99             ]
 100
 101             headers = {
 102                 'Content-Type': 'application/json',
 103                 'Accept': 'application/json',
 104                 'X-Auth-Token':self.session.get_token(),
 105             }
 106
 107             requests.put(self.inspector_url, data=json.dumps(data), headers=headers)
 108
 109
 110 def get_args():
 111     parser = argparse.ArgumentParser(description='Doctor Sample Monitor')
 112     parser.add_argument('hostname', metavar='HOSTNAME', type=str, nargs='?',
 113                         help='a hostname to monitor connectivity')
 114     parser.add_argument('ip', metavar='IP', type=str, nargs='?',
 115                         help='an IP address to monitor connectivity')
 116     parser.add_argument('inspector_type', metavar='INSPECTOR_TYPE', type=str, nargs='?',
 117                         help='inspector to report',
 118                         default='sample')
 119     parser.add_argument('inspector_url', metavar='INSPECTOR_URL', type=str, nargs='?',
 120                         help='inspector url to report error',
 121                         default='http://127.0.0.1:12345/events')
 122     return parser.parse_args()
 123
 124
 125 def main():
 126     args = get_args()
 127     monitor = DoctorMonitorSample(args)
 128     monitor.start_loop()
 129
 130
 131 if __name__ == '__main__':
 132     main()