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#!/usr/bin/env python3
# Copyright 2018 AT&T Intellectual Property, Inc. All rights reserved.
# Copyright (c) 2019 Pantheon.tech. 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.
#
# Author Prakash Hosangady(ph553f)
# DB Monitoring
# Tracks Heartbeat messages on each of the VNFs stored in postgres DB
# and generates Missing Heartbeat signal for Policy Engine
import math
import sched, datetime, time
import json
import string
import sys
import os
import logging
import socket
import requests
from . import htbtworker as pm
from . import misshtbtd as db
from . import get_logger
_logger = get_logger.get_logger(__name__)
def sendControlLoopEvent(CLType, pol_url, policy_version, policy_name, policy_scope, target_type, srcName, epoc_time, closed_control_loop_name, version, target):
msg="DBM:Time to raise Control Loop Event for Control loop typ /target type - ",CLType, target_type
_logger.info(msg)
if(CLType == "ONSET"):
_logger.info("DBM:Heartbeat not received, raising alarm event")
if(target_type == "VNF"):
json_object = json.dumps({
"closedLoopEventClient": "DCAE_Heartbeat_MS",
"policyVersion": policy_version,
"policyName": policy_name,
"policyScope": policy_scope,
"target_type": target_type,
"AAI": { "generic-vnf.vnf-name": srcName} ,
"closedLoopAlarmStart": epoc_time,
"closedLoopEventStatus": "ONSET",
"closedLoopControlName": closed_control_loop_name,
"version": version,
"target": target,
"requestID": "8c1b8bd8-06f7-493f-8ed7-daaa4cc481bc",
"from": "DCAE"
});
elif(target_type == "VM"):
json_object = json.dumps({
"closedLoopEventClient": "DCAE_Heartbeat_MS",
"policyVersion": policy_version,
"policyName": policy_name,
"policyScope": policy_scope,
"target_type": target_type,
"AAI": { "vserver.vserver-name": srcName} ,
"closedLoopAlarmStart": epoc_time,
"closedLoopEventStatus": "ONSET",
"closedLoopControlName": closed_control_loop_name,
"version": version,
"target": target,
"requestID": "8c1b8bd8-06f7-493f-8ed7-daaa4cc481bc",
"from": "DCAE"
});
else:
return True
elif(CLType == "ABATED"):
_logger.info("DBM:Heartbeat received, clearing alarm event")
#last_date_time = datetime.datetime.now()
if(target_type == "VNF"):
json_object = json.dumps({
"closedLoopEventClient": "DCAE_Heartbeat_MS",
"policyVersion": policy_version,
"policyName": policy_name,
"policyScope": policy_scope,
"target_type": target_type,
"AAI": { "generic-vnf.vnf-name": srcName} ,
"closedLoopAlarmStart": epoc_time,
"closedLoopEventStatus": "ABATED",
"closedLoopControlName": closed_control_loop_name,
"version": version,
"target": target,
"requestID": "8c1b8bd8-06f7-493f-8ed7-daaa4cc481bc",
"from": "DCAE"
});
elif(target_type == "VM"):
json_object = json.dumps({
"closedLoopEventClient": "DCAE_Heartbeat_MS",
"policyVersion": policy_version,
"policyName": policy_name,
"policyScope": policy_scope,
"target_type": target_type,
"AAI": { "vserver.vserver-name": srcName} ,
"closedLoopAlarmStart": epoc_time,
"closedLoopEventStatus": "ABATED",
"closedLoopControlName": closed_control_loop_name,
"version": version,
"target": target,
"requestID": "8c1b8bd8-06f7-493f-8ed7-daaa4cc481bc",
"from": "DCAE"
});
else:
return True
else:
return True
payload = json_object
msg="DBM: CL Json object is", json_object
_logger.info(msg)
#psend_url = pol_url+'DefaultGroup/1?timeout=15000'
psend_url = pol_url
msg="DBM:",psend_url
_logger.info(msg)
#Send response for policy on output topic
try:
r = requests.post(psend_url, data=payload)
msg="DBM:",r.status_code, r.reason
_logger.info(msg)
ret = r.status_code
msg="DBM:Status code for sending the control loop event is",ret
_logger.info(msg)
except(Exception) as err:
msg='Message send failure : ', err
_logger.error(msg)
return True
def db_monitoring(current_pid,json_file,user_name,password,ip_address,port_num,db_name):
while(True):
time.sleep(20)
envPytest = os.getenv('pytest', "")
if (envPytest == 'test'):
break
try:
with open(json_file, 'r') as outfile:
cfg = json.load(outfile)
pol_url = str(cfg['streams_publishes']['dcae_cl_out']['dmaap_info']['topic_url'])
except(Exception) as err:
msg='Json file process error : ', err
_logger.error(msg)
continue
hbc_pid, hbc_state, hbc_srcName, hbc_time = db.read_hb_common(user_name,password,ip_address,port_num,db_name)
source_name = socket.gethostname()
source_name = source_name + "-" + str(os.getenv('SERVICE_NAME', ""))
connection_db = pm.postgres_db_open(user_name,password,ip_address,port_num,db_name)
cur = connection_db.cursor()
if(int(current_pid)==int(hbc_pid) and source_name==hbc_srcName and hbc_state == "RUNNING"):
_logger.info("DBM: Active DB Monitoring Instance")
db_query = "Select event_name from vnf_table_1"
cur.execute(db_query)
vnf_list = [item[0] for item in cur.fetchall()]
for event_name in vnf_list:
query_value = "SELECT current_state FROM hb_common;"
cur.execute(query_value)
rows = cur.fetchall()
hbc_state = rows[0][0]
if( hbc_state == "RECONFIGURATION"):
_logger.info("DBM:Waiting for hb_common state to become RUNNING")
break
db_query = "Select validity_flag,source_name_count,heartbeat_interval,heartbeat_missed_count,closed_control_loop_name,policy_version, policy_name,policy_scope, target_type,target,version from vnf_table_1 where event_name= '%s'" %(event_name)
cur.execute(db_query)
rows = cur.fetchall()
validity_flag = rows[0][0]
source_name_count = rows[0][1]
heartbeat_interval = rows[0][2]
heartbeat_missed_count = rows[0][3]
closed_control_loop_name = rows[0][4]
policy_version = rows[0][5]
policy_name = rows[0][6]
policy_scope = rows[0][7]
target_type = rows[0][8]
target = rows[0][9]
version = rows[0][10]
comparision_time = (heartbeat_interval*heartbeat_missed_count)*1000
if (validity_flag ==1):
for source_name_key in range(source_name_count):
epoc_time = int(round(time.time()*1000))
epoc_query = "Select last_epo_time,source_name,cl_flag from vnf_table_2 where event_name= '%s' and source_name_key=%d" %(event_name,(source_name_key+1))
cur.execute(epoc_query)
row = cur.fetchall()
if (len(row)==0):
continue
epoc_time_sec = row[0][0]
srcName = row[0][1]
cl_flag = row[0][2]
if((epoc_time-epoc_time_sec)>comparision_time and cl_flag ==0):
sendControlLoopEvent("ONSET", pol_url, policy_version, policy_name, policy_scope, target_type, srcName, epoc_time, closed_control_loop_name, version, target)
cl_flag = 1
update_query = "UPDATE vnf_table_2 SET CL_FLAG=%d where EVENT_NAME ='%s' and source_name_key=%d" %(cl_flag,event_name,(source_name_key+1))
cur.execute(update_query)
connection_db.commit()
elif((epoc_time - epoc_time_sec) < comparision_time and cl_flag ==1):
sendControlLoopEvent("ABATED", pol_url, policy_version, policy_name, policy_scope, target_type, srcName, epoc_time, closed_control_loop_name, version, target)
cl_flag = 0
update_query = "UPDATE vnf_table_2 SET CL_FLAG=%d where EVENT_NAME ='%s' and source_name_key=%d" %(cl_flag,event_name,(source_name_key+1))
cur.execute(update_query)
connection_db.commit()
else: #pragma: no cover
msg="DBM:DB Monitoring is ignored for %s since validity flag is 0" %(event_name)
_logger.info(msg)
delete_query_table2 = "DELETE FROM vnf_table_2 WHERE EVENT_NAME = '%s';" %(event_name)
cur.execute(delete_query_table2)
delete_query = "DELETE FROM vnf_table_1 WHERE EVENT_NAME = '%s';" %(event_name)
cur.execute(delete_query)
connection_db.commit()
"""
Delete the VNF entry in table1 and delete all the source ids related to vnfs in table2
"""
else: #pragma: no cover
msg="DBM:Inactive instance or hb_common state is not RUNNING"
_logger.info(msg)
pm.commit_and_close_db(connection_db)
cur.close()
break;
if __name__ == "__main__":
_logger.info("DBM: DBM Process started")
current_pid = sys.argv[1]
jsfile = sys.argv[2]
ip_address, port_num, user_name, password, db_name, cbs_polling_required, cbs_polling_interval = db.read_hb_properties(jsfile)
msg="DBM:Parent process ID and json file name",current_pid, jsfile
_logger.info(msg)
while (True):
db_monitoring(current_pid,jsfile,user_name,password,ip_address,port_num,db_name)
envPytest = os.getenv('pytest', "")
if (envPytest == 'test'):
break
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