O.K.
Without further delay - here is a python script that will e-mail you in case a Http server you are monitoring is down (based on failed ping or failed http connection) :
http_ping.py
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import smtplib
from email.mime.text import MIMEText
import optparse, subprocess, os, sys
import re, time, datetime
from optparse import OptionParser
from os import stat
from os.path import abspath
from stat import ST_SIZE
import httplib
import sys
SLEEP_TIME = 60
email_from = ""
email_to = ""
smtp_server=""
ssl=False
smtp_user=None
smtp_password=None
def runProcess(exe):
FNULL = open(os.devnull, 'w')
p = subprocess.call(exe, stdout=FNULL, stderr=FNULL)
if p == 0:
return True
else:
return False
def sendAlert(state, host, debug,what):
subject = ""
statetext = ""
if state == 0:
statetext = "up"
elif state == 1:
statetext = "down"
subject = "Host %s is %s" % (host, statetext)
ts = time.time()
f_ts = str(datetime.datetime.fromtimestamp(ts).strftime('%Y-%m-%d %H:%M:%S'))
text = "Host " + host + " went " + statetext + " at " + f_ts + " based on " + what
msg = MIMEText(text)
msg[ 'From' ] = email_from
msg[ 'To' ] = ", " + email_to
msg[ 'Subject' ] = subject
try:
#if ssl/tls smtp
if ssl:
s = smtplib.SMTP_SSL(smtp_server)
if debug: print "SSL SERVER:" + smtp_server
#if not encrypted
else:
s = smtplib.SMTP(smtp_server)
if debug: print "PLAIN SMTP SERVER:" + smtp_server
if debug:
s.set_debuglevel(True)
#if authentication required
if smtp_user!=None and smtp_password!=None:
if debug: print "user and pass are set"
s.login(smtp_user,smtp_password)
s.sendmail(email_from, [email_to], msg.as_string())
s.quit()
except Exception as e:
if debug: print "error sending email:"
#if debug: print msg
if debug: print e
def main():
usage = "usage: %prog [options] arg"
parser = OptionParser(usage)
parser.add_option('-d', '--debug', action='store_true', dest='debug', default=False, help='enable debugging')
parser.add_option('-e', '--encrypted', action='store_true', dest='ssl', default=False, help='ssl/tls smtp')
parser.add_option('-p', '--ping', action='store', dest='host', default=None, help='specify host to ping')
parser.add_option('-s', '--smtp', action='store', dest='smtp', default=None, help='Specify Mail Server (SMTP)')
parser.add_option('-t', '--to', action='store', dest='mail_to', default=None, help='Specify Mail Receiver addresses')
parser.add_option('-f', '--from', action='store', dest='mail_from', default='Http Ping', help='Specify Mail Sender address')
parser.add_option('-u', '--smtp_user', action='store', dest='smtp_user', default=None, help='SMTP user (optional)')
parser.add_option('-w', '--smtp_password', action='store', dest='smtp_password', default=None, help='SMTP password (optional)')
parser.add_option('-z', '--sleepTime', action='store', dest='sleep', default=60, help='sleep time(optional)')
if len(sys.argv) == 1:
parser.print_help()
sys.exit( 1 )
(options, args) = parser.parse_args()
if options.host == None:
parser.print_help()
sys.exit( 1 )
if options.smtp == None:
parser.print_help()
sys.exit( 1 )
if options.mail_to == None:
parser.print_help()
sys.exit( 1 )
global SLEEP_TIME,email_from,email_to,ssl,smtp_server
SLEEP_TIME = int(options.sleep)
email_from = options.mail_from
email_to = options.mail_to
smtp_server=options.smtp
ssl=options.ssl
try:
upflag = True
while(True):
if options.debug: print "pinging host: " + str(options.host)
pingresult = runProcess(["ping", options.host])
http_ping_result = False
try:
conn = httplib.HTTPConnection(options.host)
conn.request('HEAD', '/')
url = 'http://{0}/{1}'.format(options.host,"")
if options.debug: print ' Trying: {0}'.format(url)
response = conn.getresponse()
if options.debug: print ' Got: ', response.status, response.reason
conn.close()
if response.status == 200:
if options.debug: print ("Got Response 200 " +" everything is ok")
http_ping_result = True
except:
e = sys.exc_info()[0]
print ' Problem in connection ' + str(e)
http_ping_result = False
if pingresult == False or http_ping_result==False:
what=""
if pingresult == False: what =what + "ping "
if http_ping_result == False: what =what + " http"
if options.debug: print "ping failed" + str(pingresult)
if upflag == True:
if options.debug: print "send down email"
sendAlert(1,options.host,options.debug,what)
upflag = False
else:
if options.debug: print "ping was successful..."
if upflag == False:
if options.debug: print "send up email"
sendAlert(0,options.host,options.debug,what)
upflag = True
if options.debug: print "sleeping for "+str(SLEEP_TIME) +"s"
time.sleep(SLEEP_TIME)
except (KeyboardInterrupt, SystemExit):
#raise
print "Exiting"
except Exception as e:
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
print(exc_type, fname, exc_tb.tb_lineno)
exit ( 1 )
exit( 1 )
if __name__ == '__main__':
main()
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usage example:
http_ping.py -d -p my.Server.com -s my.mail.server.com -t my.mail@my.mail.com -z 30
