Persistent Monitor

Hi all,

 

 

I´m trying to create a monitor that once connected do not disconnect and time to time send a string to the server and wait for a string.

 

 

I create it with a python script, it works with only one persistent connection when I´m running it in shell. But when I create an external monitor in big-ip, everytime it runs the script it kill all the processes and start it again.

 

 

I tried to create another script, that just call the main script and put it in background, but even this way big-ip monitor kills all related processes everytime it runs.

 

 

Below are my "monitor" that calls the main script that make all the dirt job.... when I run it via shell it works fine but when it is called via monitor everytime hsm_monitor finish hsm_client.py also finish. Any suggestion to avoid this behavior?

 

 

!/usr/bin/python

 

 

import os

 

import sys

 

import subprocess

 

 

recebe as variaveis por parametro

 

serverIP6 = sys.argv[1]

 

serverIP = serverIP6.lstrip("::ffff:")

 

recebe o segundo parametro do comando que define a porta

 

serverPort = sys.argv[2]

 

if os.getenv('SEND'):

 

message = os.getenv('SEND')

 

else:

 

message = sys.argv[3]

 

if os.getenv('RECV'):

 

resposta = os.getenv('RECV')

 

else:

 

resposta = sys.argv[4]

 

 

filename = "/config/monitors/hsm_monitor_status.txt"

 

pidfile = "/var/lock/hsm_client_" + serverIP + serverPort + ".pid"

 

 

program_name = "nohup"

 

program_2 = "/config/monitors/hsm_client.py"

 

arguments = (serverIP6, serverPort, message, resposta)

 

command = [program_name]

 

command.extend(arguments)

 

command = "nohup /config/monitors/hsm_client.py " + serverIP6 + " " + serverPort + " " + message + " " + resposta + " &"

 

print program_2

 

print arguments

 

 

verifica se existe o pid file

 

if os.path.isfile(pidfile):

 

file = open(pidfile, 'r')

 

file.seek(0)

 

pd = file.readline()

 

file.close()

 

if os.path.exists("/proc/%s" % pd):

 

Programa ja esta rodando, so coleta o status

 

file = open(filename, 'r')

 

file.seek(0)

 

status = file.readline()

 

if status == "UP":

 

print status

 

file.close()

 

else:

 

Pid file existe mas o programa nao esta mais rodando, inicia-o

 

os.unlink(pidfile)

 

subprocess.Popen(command, shell = True, stdout = subprocess.PIPE, stderr = subprocess.STDOUT)

 

subprocess.Popen(command, stderr = subprocess.STDOUT)

 

os.system(command)

 

pid = os.fork()

 

if not pid:

 

subprocess.Popen(command, shell = True)

 

os.wait()[0]

 

else:

 

nao existe pid file, executa o programa

 

subprocess.Popen(command, shell = True, stdout = subprocess.PIPE, stderr = subprocess.STDOUT)

 

subprocess.Popen(command, stderr = subprocess.STDOUT)

 

os.system(command)

 

pid = os.fork()

 

if not pid:

 

subprocess.Popen(command, shell = True)

 

os.wait()[0]

 

 

 

Thanks

 

Ukstin