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#!/usr/bin/env python3
# ============LICENSE_START=======================================================
# Copyright (c) 2018-2021 AT&T Intellectual Property. All rights reserved.
# Copyright (c) 2019 Pantheon.tech. All rights reserved.
# Copyright (c) 2020 Deutsche Telekom. All rights reserved.
# Copyright (c) 2021 Fujitsu Ltd.
# ================================================================================
# 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=========================================================
#
# 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 json
import logging
import sys
import os
import socket
import time
import requests
import htbtworker as pm
import misshtbtd as db
import get_logger
_logger = logging.getLogger(__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
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")
cur.execute("SELECT event_name FROM vnf_table_1")
vnf_list = [item[0] for item in cur.fetchall()]
for event_name in vnf_list:
cur.execute("SELECT current_state FROM hb_common")
rows = cur.fetchall()
hbc_state = rows[0][0]
if hbc_state == "RECONFIGURATION":
_logger.info("DBM:Waiting for hb_common state to become RUNNING")
break
cur.execute(
"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,),
)
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))
cur.execute(
"SELECT last_epo_time, source_name, cl_flag FROM vnf_table_2 WHERE "
"event_name = %s AND source_name_key = %s",
(event_name, (source_name_key + 1)),
)
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
cur.execute(
"UPDATE vnf_table_2 SET CL_FLAG = %s WHERE EVENT_NAME = %s AND " "source_name_key = %s",
(cl_flag, event_name, (source_name_key + 1)),
)
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
cur.execute(
"UPDATE vnf_table_2 SET CL_FLAG = %s WHERE EVENT_NAME = %s AND " "source_name_key = %s",
(cl_flag, event_name, (source_name_key + 1)),
)
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)
cur.execute("DELETE FROM vnf_table_2 WHERE EVENT_NAME = %s", (event_name,))
cur.execute("DELETE FROM vnf_table_1 WHERE EVENT_NAME = %s", (event_name,))
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__":
get_logger.configure_logger("db_monitoring")
_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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