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#!/usr/bin/python
# Copyright 2017 AT&T Intellectual Property, Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import requests
import math
import sched, datetime, time
import json
import string
import sys
intvl = 60
missing_htbt = 2
#tracks last epoch time
hearttrack = {}
#tracks sequence number
heartstate = {}
#tracks sequence number differences
heartflag = {}
#saves heartbeat message for policy
heartmsg = {}
mr_url = 'http://mrrouter.att.com:3904'
pol_url = 'http://mrrouter.att.com:3904'
intopic = 'VESCOLL-VNFNJ-SECHEARTBEAT-OUTPUT'
outopic = 'POLICY-HILOTCA-EVENT-OUTPUT'
# Checks for heartbeat event on periodic basis
class PeriodicScheduler(object):
def __init__(self):
self.scheduler = sched.scheduler(time.time, time.sleep)
def setup(self, interval, action, actionargs=()):
action(*actionargs)
self.scheduler.enter(interval, 1, self.setup,
(interval, action, actionargs))
def run(self):
self.scheduler.run()
def get_collector_uri():
"""
This method waterfalls reads an envioronmental variable called COLLECTOR_HOST
If that doesn't work, it raises an Exception
"""
with open('/opt/config/coll_ip.txt', 'r') as myfile:
coll_ip=myfile.read().replace('\n', '')
myfile.close()
with open('/opt/config/coll_port.txt', 'r') as myfile2:
coll_port=myfile2.read().replace('\n', '')
myfile2.close()
if coll_ip and coll_port:
# WARNING! TODO! Currently the env file does not include the port.
# But some other people think that the port should be a part of that.
# For now, I'm hardcoding 8500 until this gets resolved.
return "http://{0}:{1}".format(coll_ip, coll_port)
else:
raise BadEnviornmentENVNotFound("COLLECTOR_HOST")
def get_policy_uri():
"""
This method waterfalls reads an envioronmental variable called POLICY_HOST
If that doesn't work, it raises an Exception
"""
with open('/opt/config/coll_ip.txt', 'r') as myfile:
pol_ip=myfile.read().replace('\n', '')
myfile.close()
with open('/opt/config/coll_port.txt', 'r') as myfile2:
pol_port=myfile2.read().replace('\n', '')
myfile2.close()
if pol_ip and pol_port :
# WARNING! TODO! Currently the env file does not include the port.
# But some other people think that the port should be a part of that.
# For now, I'm hardcoding 8500 until this gets resolved.
return "http://{0}:{1}".format(pol_ip,pol_port)
else:
raise BadEnviornmentENVNotFound("POLICY_HOST")
# Process the heartbeat event on input topic
def periodic_event():
print("Checking... ")
print(datetime.datetime.now())
#Read heartbeat
get_url = mr_url+'/events/'+intopic+'/DefaultGroup/1?timeout=15000'
print(get_url)
res = requests.get(get_url)
#print(res)
#print(res.headers)
print(res.text)
#print(res.json)
inputString = res.text
jlist = json.loads(inputString);
#print("List:"+jlist[0])
for line in jlist:
#print(line)
jobj = json.loads(line)
#print(jobj)
srcid = (jobj['event']['commonEventHeader']['sourceId'])
lastepo = (jobj['event']['commonEventHeader']['lastEpochMicrosec'])
seqnum = (jobj['event']['commonEventHeader']['sequence'])
if( srcid in hearttrack ):
tdiff = lastepo - hearttrack[srcid]
sdiff = seqnum - heartstate[srcid]
print("Existing source time diff :"+str(tdiff)+" seqdiff :"+str(sdiff))
# check time difference is within limits and seq num is less than allowed
if((0 <= tdiff <= 61000000) and sdiff < missing_htbt):
print("Heartbeat Alive...")
hearttrack[srcid] = lastepo
heartstate[srcid] = seqnum;
heartflag[srcid] = sdiff;
heartmsg[srcid] = jobj;
else:
print("Heartbeat Dead raising alarm event")
#payload = {'Event': 'Heartbeat Failure', 'Host': srcid, 'LastTimestamp': hearttrack[srcid], 'Sequence': heartstate[srcid]}
payload = {"event": {
"commonEventHeader": {
"reportingEntityName": "VNFVM",
"reportingEntityName": "VNFVM",
"startEpochMicrosec": 1508641592248000,
"lastEpochMicrosec": 1508641592248000,
"eventId": "VNFVM_heartbeat",
"sequence": 1,
"priority": "Normal",
"sourceName": "VNFVM",
"domain": "heartbeat",
"eventName": "Heartbeat_Vnf",
"internalHeaderFields": {
"closedLoopFlag": "True",
"eventTag": "hp.Heartbeat Service.20171022.8447964515",
"collectorTimeStamp": "Sun, 10 22 2017 03:04:27 GMT",
"lastDatetime": "Sun, 22 Oct 2017 03:06:32 +0000",
"closedLoopControlName": "ControlLoopEvent1",
"firstDatetime": "Sun, 22 Oct 2017 03:06:32 +0000"
},
"reportingEntityId": "cff8656d-0b42-4eda-ab5d-3d2b7f2d74c8",
"version": 3,
"sourceId": "cff8656d-0b42-4eda-ab5d-3d2b7f2d74c8"
}
}
}
payload = heartmsg[srcid]
print(payload)
send_url = pol_url+'/events/'+outopic+'/DefaultGroup/1?timeout=15000'
print(send_url)
#Send response for policy on output topic
r = requests.post(send_url, data=payload)
print(r.status_code, r.reason)
del heartstate[srcid]
del hearttrack[srcid]
del heartflag[srcid]
else:
print("Adding new source")
hearttrack[srcid] = lastepo
heartstate[srcid] = seqnum
heartflag[srcid] = 1
heartmsg[srcid] = jobj;
chkeys = []
for key in heartstate.iterkeys():
print(key,heartstate[key])
if( heartflag[key] == 0 ):
print("Heartbeat Dead raise alarm event"+key)
chkeys.append( key )
#payload = {'Event': 'Heartbeat Failure', 'Host': key, 'LastTimestamp': hearttrack[key], 'Sequence': heartstate[key]}
#print payload
payload = {"event": {
"commonEventHeader": {
"reportingEntityName": "VNFVM",
"startEpochMicrosec": 1508641592248000,
"lastEpochMicrosec": 1508641592248000,
"eventId": "VNFVM_heartbeat",
"sequence": 1,
"priority": "Normal",
"sourceName": "VNFVM",
"domain": "heartbeat",
"eventName": "Heartbeat_Vnf",
"internalHeaderFields": {
"closedLoopFlag": "True",
"eventTag": "hp.Heartbeat Service.20171022.8447964515",
"collectorTimeStamp": "Sun, 10 22 2017 03:04:27 GMT",
"lastDatetime": "Sun, 22 Oct 2017 03:06:32 +0000",
"closedLoopControlName": "ControlLoopEvent1",
"firstDatetime": "Sun, 22 Oct 2017 03:06:32 +0000"
},
"reportingEntityId": "cff8656d-0b42-4eda-ab5d-3d2b7f2d74c8",
"version": 3,
"sourceId": "cff8656d-0b42-4eda-ab5d-3d2b7f2d74c8"
}
}
}
payload = heartmsg[key]
print(payload)
send_url = pol_url+'/events/'+outopic+'/DefaultGroup/1?timeout=15000'
print(send_url)
r = requests.post(send_url, data=payload)
print(r.status_code, r.reason)
heartflag[key] = 0
for chkey in chkeys:
print(chkey)
del heartstate[chkey]
del hearttrack[chkey]
del heartflag[chkey]
total = len(sys.argv)
cmdargs = str(sys.argv)
print ("The total numbers of args passed to the script: %d " % total)
print ("Args list: %s " % cmdargs)
print ("Script name: %s" % str(sys.argv[0]))
for i in range(total):
print ("Argument # %d : %s" % (i, str(sys.argv[i])))
if( total >= 6 ):
mr_url = get_collector_uri()
pol_url = get_policy_uri()
#mr_url = sys.argv[1]
missing_htbt = float(int(sys.argv[2]))
intvl = float(int(sys.argv[3]))
intopic = sys.argv[4]
outopic = sys.argv[5]
print ("Interval %s " % intvl)
#intvl = 60 # every second
periodic_scheduler = PeriodicScheduler()
periodic_scheduler.setup(intvl, periodic_event) # it executes the event just once
periodic_scheduler.run() # it starts the scheduler
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