Simple service monitor

ssm.py

#!/usr/bin/env python

"""ssm.py: Simple service monitor."""

__author__ = "Eun"
__copyright__ = "Copyright 2015, Eun"
__license__ = "GPL"
__version__ = "1.0.0"

# Service Configuration
###########################################################################
#
# Enter all services you need to check in the following format
# "ServiceName": "hostname:port"
# Seperate each entry with a comma
# Leave the list empty to omit the check
# Example:
# 	IPv4Services = {"FTP": "example.com:21", "HTTP": "example.com:80", "HTTPS": "example.com:443"}
# 	IPv6Services = {"HTTP": "example.com:80", "HTTPS": "example.com:443"}
# Check FTP, HTTP & HTTPS in IPv4 mode
# Only check HTTP & HTTPS in IPv6 mode, FTP wont be checked in IPv6!
# Hint: You could also avoid double typing by coping the list:
# 	IPv4Services = {"FTP": "example.com:21", "HTTP": "example.com:80", "HTTPS": "example.com:443"}
# 	IPv6Services = IPv4Services.copy()
#

IPv4Services = {"HTTP": "example.com", "HTTPS": "example.com"}
IPv6Services = IPv4Services.copy()

# Email Configuration
###########################################################################
#
# Should SSM send a mail?
SendMail = True

# Set the smtp server to send mails from
MailServerHost = "smtp.example.com"
MailServerPort = 465

# Use SSL?
MailServerSSL = True

# Use StartTLS
MailStartTLS = False

# smtp username
MailUser = "nobody"
# smtp password
MailPassword = "password"
# Title to use when something is down
MailTitleDown = "[SSM] Some Services are down!"
# Title to use when everything is ok
MailTitleUp = "[SSM] All Services are Up!"
# Sender
MailFrom = "[email protected]"
# Recipent list 
# Format ["[email protected]", "[email protected]", ..., "[email protected]" ]
MailTo = ["[email protected]"]

# AdditionalInfo to put in the mail
# Good for IP Address or other details.
AdditionalInfo = ""

# Cronjob Configuration
###########################################################################
#
# The best is if you run this script in a cronjob, lets say every 5 minutes
# and every 24 hours to make sure all services are up:
#
# */5 * * * * python ssm.py >/dev/null 2>&1  # Run every 5 minutes
# *   3 * * * python ssm.py -f >/dev/null 2>&1  # Run every 24 hours (3am)
#
###########################################################################
# Configuration End

import sys
import socket
import smtplib
import datetime
import getopt

def testTCP(proto, host, port):
	if (proto == "IPv4"):
		proto = socket.AF_INET
	else: 
		proto = socket.AF_INET6
	s = socket.socket(proto, socket.SOCK_STREAM)
	try:
		s.connect((host, port))
		s.close()
		return True
	except Exception, e:
		return False

def main():
	forceMail = False
	try:
		optlist, args = getopt.getopt(sys.argv[1:], "hfv", ["help", "force", "version"])
		for o, a in optlist:
			if o in ("-f", "--forced"):
				forceMail = True
			elif o in ("-h", "--help"):
				print "usage: ssm.py [option]"
				print "Options:"
				print "-f, --force   force the sending of a mail even if everything is up"
				print "-h, --help    shows this help"
				print "-v, --version shows the version"
				print ""
				print "SimpleServiceMonitor {0}".format(__version__)
				return 1
			elif o in ("-v", "--version"):
				print "SimpleServiceMonitor {0}".format(__version__)
				return 1
	except:
		pass

	ServicesList = {"IPv4": IPv4Services, "IPv6": IPv6Services}
	OutputList = []
	Failures = 0

	for IPvX,Services in ServicesList.iteritems():
		for Key,Value in Services.iteritems():
			conn = Value.split(':')
			service = "{0}({1}, {2})".format(Key, IPvX, Value)
			if (not testTCP(IPvX, conn[0], int(conn[1]))):
				service = "DOWN: {0}".format(service)
				print service
				OutputList.append(service)
				Failures = Failures + 1
			else:
				service = "UP:   {0}".format(service)
				print service
				OutputList.append(service)

	if (SendMail and (Failures > 0 or forceMail)):
		if (Failures > 0):
			MailTitle = MailTitleDown
			headLine = "Some services have failed to respond:"
		else:
			MailTitle = MailTitleUp
			headLine = "All services are up:"

		if (len(AdditionalInfo) > 0):
			AdditionalInfoMsg = "Additional Info:\n{0}\n\n".format(AdditionalInfo)
		else:
			AdditionalInfoMsg = ""
		msg = '\n\t'.join(OutputList)
		msg = 'Subject: {0}\n\n{1}\n\t{2}\n\n{3}ServerTime: {4}\nSimpleServiceMonitor.py {5}'.format(MailTitle, headLine, msg, AdditionalInfoMsg, datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"), __version__)

		try:
			if (MailServerSSL):
				server = smtplib.SMTP_SSL(MailServerHost, MailServerPort)
			else:
				server = smtplib.SMTP(MailServerHost, MailServerPort)
			server.ehlo()
			if (MailStartTLS):
				server.starttls()
			if (len(MailUser) > 0):
				server.login(MailUser, MailPassword)
			server.sendmail(MailFrom, MailTo, msg)
			server.quit()
		except Exception, e:
			print "Error on sending mail!: "
			print e

	if (Failures > 0):
		return 1
	else:
		return 0

if __name__ == "__main__":
    sys.exit(main())