smart script? Post: 302251623

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Top Forums Shell Programming and Scripting smart script? Post 302251623 by raidzero on Monday 27th of October 2008 02:28:13 PM

10-27-2008

Registered User

smart script?

First, I know that's a bad title. I couldn't think of anything short enough. ...

I wrote the following script to let me know when various parts of the network are down. It used to look like this before last weekend when I got over 500 emails about 1 host being down all weekend:

this is in the cron to run every 5 minutes

Code:

#script to ping nodes specified in /home/scripts/watch
#supposed to email me when one does not respond.



while read HOST ; do live=`ping -c4 "$HOST"|wc -l` ; #read IP's and ping them, count the number of lines returned (should be 9 for success, 4 for failure)


if [ $live -eq 4 ] #pretty self-explanatory
then



echo "This is an automatically generated email to let you know that "$HOST" has not responded to a scheduled ping. \n\n`date`\n\n`ping -c1 "$HOST"`\n\n`traceroute "$HOST"`" | mail -s "IPwatch "$HOST" Down!" email@address.com # send a fancy email
fi
done < /home/scripts/watch # read IPs from this file

today I tried to add some smartness to it so that if it already emailed me 5 times to stop sending them every 5 minutes and instead send every hour. I added some bogus hosts into my definition file to test everything out and so far it has not worked as expected. What have I done wrong?

Code:

while read HOST ; do live=`ping -c4 "$HOST"|wc -l` ; 


if [ $live -eq 4 ] 
then

echo "ping failed" >> /home/scripts/ipwatch/$HOST
FAIL=`cat /home/scripts/ipwatch/$HOST | wc -l`
if [ $FAIL -lt 5 ]
then
echo "This is an automatically generated email to let you know that "$HOST" has not responded to a scheduled ping. \n\n`date`\n\n`ping -c1 "$HOST"`\n\n`traceroute "$HOST"`" | mail -s "IPwatch "$HOST" Down!" email@address.com 
fi
MIN=`date | awk '{print$4}' | cut -d ":" -f2,3`
while [ "$MIN" -eq "00:00" ]
do
echo "This is an hourly reminder about $HOST not responding to ping." | mail -s "IPWatch $HOST reminder" posborn@buckheadbeef.com
done
fi
done < /home/scripts/watch

Thanks

raidzero

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net::time

Net::Time(3pm)						 Perl Programmers Reference Guide					    Net::Time(3pm)

NAME

       Net::Time - time and daytime network client interface

SYNOPSIS

	   use Net::Time qw(inet_time inet_daytime);

	   print inet_time();	       # use default host from Net::Config
	   print inet_time('localhost');
	   print inet_time('localhost', 'tcp');

	   print inet_daytime();       # use default host from Net::Config
	   print inet_daytime('localhost');
	   print inet_daytime('localhost', 'tcp');

DESCRIPTION

       "Net::Time" provides subroutines that obtain the time on a remote machine.

       inet_time ( [HOST [, PROTOCOL [, TIMEOUT]]])
	   Obtain the time on "HOST", or some default host if "HOST" is not given or not defined, using the protocol as defined in RFC868. The
	   optional argument "PROTOCOL" should define the protocol to use, either "tcp" or "udp". The result will be a time value in the same
	   units as returned by time() or undef upon failure.

       inet_daytime ( [HOST [, PROTOCOL [, TIMEOUT]]])
	   Obtain the time on "HOST", or some default host if "HOST" is not given or not defined, using the protocol as defined in RFC867. The
	   optional argument "PROTOCOL" should define the protocol to use, either "tcp" or "udp". The result will be an ASCII string or undef upon
	   failure.

AUTHOR

       Graham Barr <gbarr@pobox.com>

COPYRIGHT

       Copyright (c) 1995-2004 Graham Barr. All rights reserved.  This program is free software; you can redistribute it and/or modify it under
       the same terms as Perl itself.

perl v5.16.3							    2013-02-26							    Net::Time(3pm)