############################################################################## # Copyright (c) 2016 NEC Corporation and others. # # All rights reserved. This program and the accompanying materials # are made available under the terms of the Apache License, Version 2.0 # which accompanies this distribution, and is available at # http://www.apache.org/licenses/LICENSE-2.0 ############################################################################## import argparse from datetime import datetime import json import os import requests import socket import sys import time from congressclient.v1 import client from keystoneclient import session as ksc_session from keystoneclient.auth.identity import v2 # NOTE: icmp message with all zero data (checksum = 0xf7ff) # see https://tools.ietf.org/html/rfc792 ICMP_ECHO_MESSAGE = '\x08\x00\xf7\xff\x00\x00\x00\x00' SUPPORTED_INSPECTOR_TYPES = ['sample', 'congress'] class DoctorMonitorSample(object): interval = 0.1 # second timeout = 0.1 # second event_type = "compute.host.down" def __init__(self, args): if args.inspector_type not in SUPPORTED_INSPECTOR_TYPES: raise Exception("Inspector type '%s' not supported", args.inspector_type) self.hostname = args.hostname self.inspector_url = args.inspector_url self.inspector_type = args.inspector_type self.ip_addr = args.ip or socket.gethostbyname(self.hostname) if self.inspector_type == 'congress': auth = v2.Password(auth_url=os.environ['OS_AUTH_URL'], username=os.environ['OS_USERNAME'], password=os.environ['OS_PASSWORD'], tenant_name=os.environ['OS_TENANT_NAME']) self.session = ksc_session.Session(auth=auth) congress = client.Client(session=self.session, service_type='policy') ds = congress.list_datasources()['results'] doctor_ds = next((item for item in ds if item['driver'] == 'doctor'), None) congress_endpoint = congress.httpclient.get_endpoint(auth=auth) self.inspector_url = ('%s/v1/data-sources/%s/tables/events/rows' % (congress_endpoint, doctor_ds['id'])) def start_loop(self): print "start ping to host %(h)s (ip=%(i)s)" % {'h': self.hostname, 'i': self.ip_addr} sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_ICMP) sock.settimeout(self.timeout) while True: try: sock.sendto(ICMP_ECHO_MESSAGE, (self.ip_addr, 0)) data = sock.recv(4096) except socket.timeout: print "doctor monitor detected at %s" % time.time() self.report_error() print "ping timeout, quit monitoring..." return time.sleep(self.interval) def report_error(self): if self.inspector_type == 'sample': payload = {"type": self.event_type, "hostname": self.hostname} data = json.dumps(payload) headers = {'content-type': 'application/json'} requests.post(self.inspector_url, data=data, headers=headers) elif self.inspector_type == 'congress': data = [ { 'id': 'monitor_sample_id1', 'time': datetime.now().isoformat(), 'type': self.event_type, 'details': { 'hostname': self.hostname, 'status': 'down', 'monitor': 'monitor_sample', 'monitor_event_id': 'monitor_sample_event1' }, }, ] headers = { 'Content-Type': 'application/json', 'Accept': 'application/json', 'X-Auth-Token':self.session.get_token(), } requests.put(self.inspector_url, data=json.dumps(data), headers=headers) def get_args(): parser = argparse.ArgumentParser(description='Doctor Sample Monitor') parser.add_argument('hostname', metavar='HOSTNAME', type=str, nargs='?', help='a hostname to monitor connectivity') parser.add_argument('ip', metavar='IP', type=str, nargs='?', help='an IP address to monitor connectivity') parser.add_argument('inspector_type', metavar='INSPECTOR_TYPE', type=str, nargs='?', help='inspector to report', default='sample') parser.add_argument('inspector_url', metavar='INSPECTOR_URL', type=str, nargs='?', help='inspector url to report error', default='http://127.0.0.1:12345/events') return parser.parse_args() def main(): args = get_args() monitor = DoctorMonitorSample(args) monitor.start_loop() if __name__ == '__main__': main()