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#!/usr/bin/env python3
# ============LICENSE_START=======================================================
# Copyright (c) 2017-2018 AT&T Intellectual Property. 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.
# ============LICENSE_END=========================================================
#
# ECOMP is a trademark and service mark of AT&T Intellectual Property.
# This is a main process that does the following
# - Creates the CBS polling process that indicates the periodic download of
# configuration file from CBS
# - Creates heartbeat worker process that receives the Heartbeat messages from VNF
# - Creates DB Monitoring process that generates Control loop event
# - Download the CBS configuration and populate the DB
#
# Author Prakash Hosangady(ph553f@att.com)
import traceback
import os
import sys
import json
import datetime
import time
import math
import multiprocessing
import logging
import subprocess
import yaml
import socket
import get_logger
from pathlib import Path
import mod.trapd_settings as tds
import htbtworker as heartbeat
import os.path as path
hb_properties_file = path.abspath(path.join(__file__, "../config/hbproperties.yaml"))
from mod.trapd_runtime_pid import save_pid, rm_pid
from mod.trapd_get_cbs_config import get_cbs_config
from mod.trapd_exit import cleanup_and_exit
from mod.trapd_http_session import init_session_obj
ip_address = "localhost"
port_num = 5432
user_name = "postgres"
password = "postgres"
db_name = "hb_vnf"
cbs_polling_required = "true"
cbs_polling_interval = 300
mr_url = None
pol_url = None
update_db = 0
jsfile='empty'
import sys
ABSOLUTE_PATH1 = path.abspath(path.join(__file__, "../htbtworker.py"))
ABSOLUTE_PATH2 = path.abspath(path.join(__file__, "../db_monitoring.py"))
ABSOLUTE_PATH3 = path.abspath(path.join(__file__, "../check_health.py"))
ABSOLUTE_PATH4 = path.abspath(path.join(__file__, "../cbs_polling.py"))
def create_database(update_db, jsfile, ip_address, port_num, user_name, password, db_name):
from psycopg2 import connect
import sys
try:
con = connect(user=user_name, host = ip_address, password = password)
database_name = db_name
con.autocommit = True
cur = con.cursor()
query_value = "SELECT COUNT(*) = 0 FROM pg_catalog.pg_database WHERE datname = '%s'" %(database_name)
cur.execute(query_value)
not_exists_row = cur.fetchone()
msg = "MSHBT:Create_database:DB not exists? ", not_exists_row
_logger.info(msg)
not_exists = not_exists_row[0]
if not_exists is True:
_logger.info("MSHBT:Creating database ...")
query_value = "CREATE DATABASE %s" %(database_name)
cur.execute(query_value)
else:
_logger.info("MSHBD:Database already exists")
'''
con = None
con = connect(user=user_name, host = ip_address, password=password)
database_name = db_name
con.autocommit = True
cur = con.cursor()
cur.execute('CREATE DATABASE %s IF NOT EXISTS %s' %(database_name,database_name))
'''
cur.close()
con.close()
except(Exception) as err:
msg = "MSHBD:DB Creation -",err
_logger.error(msg)
#def get_pol_and_mr_urls(jsfile, pol_url, mr_url):
# with open(jsfile, 'r') as outfile:
# cfg = json.load(outfile)
# mr_url = str(cfg['streams_subscribes']['ves-heartbeat']['dmaap_info']['topic_url'])
# pol_url = str(cfg['streams_publishes']['dcae_cl_out']['dmaap_info']['topic_url'])
def read_hb_common(user_name,password,ip_address,port_num,db_name):
envPytest = os.getenv('pytest', "")
if (envPytest == 'test'):
hbc_pid = 10
hbc_srcName = "srvc_name"
hbc_time = 1584595881
hbc_state = "RUNNING"
return hbc_pid, hbc_state, hbc_srcName, hbc_time
connection_db = heartbeat.postgres_db_open(user_name,password,ip_address,port_num,db_name)
cur = connection_db.cursor()
query_value = "SELECT process_id,source_name,last_accessed_time,current_state FROM hb_common;"
cur.execute(query_value)
rows = cur.fetchall()
hbc_pid = rows[0][0]
hbc_srcName = rows[0][1]
hbc_time = rows[0][2]
hbc_state = rows[0][3]
heartbeat.commit_and_close_db(connection_db)
cur.close()
return hbc_pid, hbc_state, hbc_srcName, hbc_time
def create_update_hb_common(update_flg, process_id, state, user_name,password,ip_address,port_num,db_name):
current_time = int(round(time.time()))
source_name = socket.gethostname()
source_name = source_name + "-" + os.getenv('SERVICE_NAME', "")
envPytest = os.getenv('pytest', "")
if (envPytest != 'test'):
connection_db = heartbeat.postgres_db_open(user_name,password,ip_address,port_num,db_name)
cur = connection_db.cursor()
if(heartbeat.db_table_creation_check(connection_db,"hb_common") ==False):
cur.execute("CREATE TABLE hb_common (PROCESS_ID integer primary key,SOURCE_NAME varchar,LAST_ACCESSED_TIME integer,CURRENT_STATE varchar);")
query_value = "INSERT INTO hb_common VALUES(%d,'%s',%d,'%s');" %(process_id, source_name, current_time, state)
_logger.info("MSHBT:Created hb_common DB and updated new values")
cur.execute(query_value)
if(update_flg == 1):
query_value = "UPDATE hb_common SET PROCESS_ID='%d',SOURCE_NAME='%s', LAST_ACCESSED_TIME='%d',CURRENT_STATE='%s'" %(process_id, source_name, current_time, state)
_logger.info("MSHBT:Updated hb_common DB with new values")
cur.execute(query_value)
heartbeat.commit_and_close_db(connection_db)
cur.close()
def create_update_vnf_table_1(jsfile,update_db,connection_db):
with open(jsfile, 'r') as outfile:
cfg = json.load(outfile)
hbcfg = cfg['heartbeat_config']
jhbcfg = json.loads(hbcfg)
envPytest = os.getenv('pytest', "")
if (envPytest == 'test'):
vnf_list = ["Heartbeat_vDNS", "Heartbeat_vFW", "Heartbeat_xx"]
else:
cur = connection_db.cursor()
if(heartbeat.db_table_creation_check(connection_db,"vnf_table_1") ==False):
cur.execute("CREATE TABLE vnf_table_1 (EVENT_NAME varchar primary key,HEARTBEAT_MISSED_COUNT integer,HEARTBEAT_INTERVAL integer,CLOSED_CONTROL_LOOP_NAME varchar,POLICY_VERSION varchar,POLICY_NAME varchar,POLICY_SCOPE varchar,TARGET_TYPE varchar,TARGET varchar, VERSION varchar,SOURCE_NAME_COUNT integer,VALIDITY_FLAG integer);")
_logger.info("MSHBT:Created vnf_table_1 table")
if(update_db == 1):
query_value = "UPDATE vnf_table_1 SET VALIDITY_FLAG=0 where VALIDITY_FLAG=1;"
cur.execute(query_value)
_logger.info("MSHBT:Set Validity flag to zero in vnf_table_1 table")
# Put some initial values into the queue
db_query = "Select event_name from vnf_table_1"
cur.execute(db_query)
vnf_list = [item[0] for item in cur.fetchall()]
for vnf in (jhbcfg['vnfs']):
nfc = vnf['eventName']
#_logger.error("MSHBT:",nfc)
validity_flag = 1
source_name_count = 0
missed = vnf['heartbeatcountmissed']
intvl = vnf['heartbeatinterval']
clloop = vnf['closedLoopControlName']
policyVersion = vnf['policyVersion']
policyName = vnf['policyName']
policyScope = vnf['policyScope']
target_type = vnf['target_type']
target = vnf['target']
version = vnf['version']
if(nfc not in vnf_list):
query_value = "INSERT INTO vnf_table_1 VALUES('%s',%d,%d,'%s','%s','%s','%s','%s','%s','%s',%d,%d);" %(nfc,missed,intvl,clloop,policyVersion,policyName,policyScope,target_type, target,version,source_name_count,validity_flag)
else:
query_value = "UPDATE vnf_table_1 SET HEARTBEAT_MISSED_COUNT='%d',HEARTBEAT_INTERVAL='%d', CLOSED_CONTROL_LOOP_NAME='%s',POLICY_VERSION='%s',POLICY_NAME='%s', POLICY_SCOPE='%s',TARGET_TYPE='%s', TARGET='%s',VERSION='%s',VALIDITY_FLAG='%d' where EVENT_NAME='%s'" %(missed,intvl,clloop,policyVersion,policyName,policyScope,target_type,target,version,validity_flag,nfc)
if (envPytest != 'test'):
cur.execute(query_value)
#heartbeat.commit_and_close_db(connection_db)
if (envPytest != 'test'):
cur.close()
_logger.info("MSHBT:Updated vnf_table_1 as per the json configuration file")
def hb_cbs_polling_process(pid_current):
my_file = Path("./miss_htbt_service/cbs_polling.py")
# if my_file.is_file():
subprocess.call(["python3.6",ABSOLUTE_PATH4 , str(pid_current) ])
# else:
# subprocess.call(["python3.6",ABSOLUTE_PATH4 , str(pid_current) ])
sys.stdout.flush()
_logger.info("MSHBT:Creaated CBS polling process")
return
def hb_worker_process(config_file_path):
my_file = Path("./miss_htbt_service/htbtworker.py")
# if my_file.is_file():
subprocess.call(["python3.6",ABSOLUTE_PATH1 , config_file_path ])
# else:
# subprocess.call(["python3.6",ABSOLUTE_PATH1 , config_file_path ])
sys.stdout.flush()
_logger.info("MSHBT:Creaated Heartbeat worker process")
return
def db_monitoring_process(current_pid,jsfile):
my_file = Path("./miss_htbt_service/db_monitoring.py")
# if my_file.is_file():
subprocess.call(["python3.6",ABSOLUTE_PATH2 , str(current_pid),jsfile])
# else:
# subprocess.call(["python3.6",ABSOLUTE_PATH2 , str(current_pid),jsfile])
sys.stdout.flush()
_logger.info("MSHBT:Creaated DB Monitoring process")
return
def read_hb_properties_default():
#Read the hbproperties.yaml for postgress and CBS related data
s=open(hb_properties_file, 'r')
a=yaml.load(s)
if((os.getenv('pg_ipAddress') is None) or (os.getenv('pg_portNum') is None) or (os.getenv('pg_userName') is None) or (os.getenv('pg_passwd') is None)):
ip_address = a['pg_ipAddress']
port_num = a['pg_portNum']
user_name = a['pg_userName']
password = a['pg_passwd']
else:
ip_address = os.getenv('pg_ipAddress')
port_num = os.getenv('pg_portNum')
user_name = os.getenv('pg_userName')
password = os.getenv('pg_passwd')
dbName = a['pg_dbName']
db_name = dbName.lower()
cbs_polling_required = a['CBS_polling_allowed']
cbs_polling_interval = a['CBS_polling_interval']
s.close()
return ip_address, port_num, user_name, password, db_name, cbs_polling_required, cbs_polling_interval
def read_hb_properties(jsfile):
try:
with open(jsfile, 'r') as outfile:
cfg = json.load(outfile)
except(Exception) as err:
msg = "CBS Json file load error - ",err
_logger.error(msg)
return read_hb_properties_default()
try:
ip_address = str(cfg['pg_ipAddress'])
port_num = str(cfg['pg_portNum'])
user_name = str(cfg['pg_userName'])
password = str(cfg['pg_passwd'])
dbName = str(cfg['pg_dbName'])
db_name = dbName.lower()
cbs_polling_required = str(cfg['CBS_polling_allowed'])
cbs_polling_interval = str(cfg['CBS_polling_interval'])
consumer_id = str(cfg['consumerID'])
group_id = str(cfg['groupID'])
os.environ['consumerID'] = consumer_id
os.environ['groupID'] = group_id
if("SERVICE_NAME" in cfg.keys()):
os.environ['SERVICE_NAME'] = str(cfg['SERVICE_NAME'])
except(Exception) as err:
msg = "CBS Json file read parameter error - ",err
_logger.error(msg)
return read_hb_properties_default()
return ip_address, port_num, user_name, password, db_name, cbs_polling_required, cbs_polling_interval
def fetch_json_file():
if get_cbs_config():
#current_runtime_config_file_name = tds.c_config['files.runtime_base_dir'] + "../etc/download.json"
envPytest = os.getenv('pytest', "")
if (envPytest == 'test'):
current_runtime_config_file_name = "/tmp/opt/app/miss_htbt_service/etc/config.json"
else:
current_runtime_config_file_name = "../etc/download.json"
msg = "MSHBD:current config logged to : %s" % current_runtime_config_file_name
_logger.info(msg)
with open(current_runtime_config_file_name, 'w') as outfile:
json.dump(tds.c_config, outfile)
if os.getenv('pytest', "") == 'test':
jsfile = current_runtime_config_file_name
else:
jsfile = "../etc/config.json"
os.system('cp ../etc/download.json ../etc/config.json')
os.remove("../etc/download.json")
else:
msg = "MSHBD:CBS Config not available, using local config"
_logger.warning(msg)
my_file = Path("./etc/config.json")
if my_file.is_file():
jsfile = "./etc/config.json"
else:
jsfile = "../etc/config.json"
msg = "MSHBT: The json file is - ", jsfile
_logger.info(msg)
return jsfile
def create_update_db(update_db, jsfile, ip_address, port_num, user_name, password, db_name):
envPytest = os.getenv('pytest', "")
if (envPytest != 'test'): #pragma: no cover
if(update_db == 0):
create_database(update_db, jsfile, ip_address, port_num, user_name, password, db_name)
msg = "MSHBT: DB parameters -", ip_address, port_num, user_name, password, db_name
_logger.info(msg)
connection_db = heartbeat.postgres_db_open(user_name,password,ip_address,port_num,db_name)
cur = connection_db.cursor()
if(update_db == 0):
if(heartbeat.db_table_creation_check(connection_db,"vnf_table_1") ==False):
create_update_vnf_table_1(jsfile,update_db,connection_db)
else:
create_update_vnf_table_1(jsfile,update_db,connection_db)
heartbeat.commit_and_close_db(connection_db)
cur.close()
def create_process(job_list, jsfile, pid_current):
if(len(job_list) == 0):
p1 = multiprocessing.Process(target=hb_worker_process, args=(jsfile,))
time.sleep(1)
p2 = multiprocessing.Process(target=db_monitoring_process, args=(pid_current,jsfile,))
p1.start()
time.sleep(1)
p2.start()
job_list.append(p1)
job_list.append(p2)
msg = "MSHBD:jobs list is",job_list
_logger.info(msg)
return job_list
_logger = get_logger.get_logger(__name__)
def main():
try:
p = subprocess.Popen(['python3.6',ABSOLUTE_PATH3],stdout=subprocess.PIPE,stderr=subprocess.STDOUT)
_logger.info("MSHBD:Execution Started")
job_list = []
pid_current = os.getpid()
jsfile = fetch_json_file()
ip_address, port_num, user_name, password, db_name, cbs_polling_required, cbs_polling_interval = read_hb_properties(jsfile)
msg = "MSHBT:HB Properties -", ip_address, port_num, user_name, password, db_name, cbs_polling_required, cbs_polling_interval
_logger.info(msg)
if(cbs_polling_required == 'True'):
p3 = multiprocessing.Process(target=hb_cbs_polling_process, args=(pid_current,))
p3.start()
update_db = 0
create_update_db(update_db, jsfile, ip_address, port_num, user_name, password, db_name)
state = "RECONFIGURATION"
update_flg = 0
create_update_hb_common(update_flg, pid_current, state, user_name,password,ip_address,port_num,db_name)
msg = "MSHBD:Current process id is",pid_current
_logger.info(msg)
_logger.info("MSHBD:Now be in a continuous loop")
i=0
while(True):
hbc_pid, hbc_state, hbc_srcName, hbc_time = read_hb_common(user_name,password,ip_address,port_num,db_name)
msg = "MSHBT: hb_common values ",hbc_pid, hbc_state, hbc_srcName, hbc_time
_logger.info(msg)
current_time = int(round(time.time()))
time_difference = current_time - hbc_time
msg = "MSHBD:pid,srcName,state,time,ctime,timeDiff is",hbc_pid,hbc_srcName,hbc_state,hbc_time,current_time,time_difference
_logger.info(msg)
source_name = socket.gethostname()
source_name = source_name + "-" + str(os.getenv('SERVICE_NAME', ""))
envPytest = os.getenv('pytest', "")
if (envPytest == 'test'):
if i == 2:
hbc_pid = pid_current
source_name = hbc_srcName
hbc_state = "RECONFIGURATION"
elif (i>3):
hbc_pid = pid_current
source_name = hbc_srcName
hbc_state = "RUNNING"
if (time_difference <60):
if((int(hbc_pid)==int(pid_current)) and (source_name==hbc_srcName)):
msg = "MSHBD:config status is",hbc_state
_logger.info(msg)
if(hbc_state=="RUNNING"):
state = "RUNNING"
update_flg = 1
create_update_hb_common(update_flg, pid_current, state, user_name,password,ip_address,port_num,db_name)
elif(hbc_state=="RECONFIGURATION"):
_logger.info("MSHBD:Reconfiguration is in progress,Starting new processes by killing the present processes")
jsfile = fetch_json_file()
update_db = 1
create_update_db(update_db, jsfile, ip_address, port_num, user_name, password, db_name)
msg = "MSHBD: parameters passed to DBM and HB are %d and %s",pid_current
_logger.info(msg)
job_list = create_process(job_list, jsfile, pid_current)
state = "RUNNING"
update_flg = 1
create_update_hb_common(update_flg, pid_current, state, user_name,password,ip_address,port_num,db_name)
else:
_logger.info("MSHBD:Inactive Instance: Process IDs are different, Keep Looping")
if(len(job_list)>=2):
_logger.info("MSHBD:Inactive Instance: Main and DBM thread are waiting to become ACTIVE")
else:
jsfile = fetch_json_file()
msg = "MSHBD:Inactive Instance:Creating HB and DBM threads if not created already. The param pssed %d and %s",jsfile,pid_current
_logger.info(msg)
job_list = create_process(job_list, jsfile, pid_current)
else:
_logger.info("MSHBD:Active instance is inactive for long time: Time to switchover")
if((int(hbc_pid)!=int(pid_current))or (source_name!=hbc_srcName)):
_logger.info("MSHBD:Initiating to become Active Instance")
if(len(job_list)>=2):
_logger.info("MSHBD:HB and DBM thread are waiting to become ACTIVE")
else:
jsfile = fetch_json_file()
msg = "MSHBD: Creating HB and DBM threads. The param pssed %d and %s",jsfile,pid_current
_logger.info(msg)
job_list = create_process(job_list, jsfile, pid_current)
hbc_pid, hbc_state, hbc_srcName, hbc_time = read_hb_common(user_name,password,ip_address,port_num,db_name)
update_flg = 1
create_update_hb_common(update_flg, pid_current, hbc_state, user_name,password,ip_address,port_num,db_name)
else:
_logger.error("MSHBD:ERROR - Active instance is not updating hb_common in 60 sec - ERROR")
time.sleep(25)
if os.getenv('pytest', "") == 'test':
i = i + 1
if(i > 5):
_logger.info("Terminating main process for pytest")
p3.terminate()
time.sleep(1)
p3.join()
if(len(job_list)>0):
job_list[0].terminate()
time.sleep(1)
job_list[0].join()
job_list.remove(job_list[0])
if(len(job_list)>0):
job_list[0].terminate()
time.sleep(1)
job_list[0].join()
job_list.remove(job_list[0])
break
except (Exception) as e:
msg = "MSHBD:Exception as %s" %(str(traceback.format_exc()))
_logger.error(msg)
msg = "Fatal error. Could not start missing heartbeat service due to: {0}".format(e)
_logger.error(msg)
if __name__ == '__main__':
main()
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