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Old 06-04-2003, 12:47 PM   #1
Bilb
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Resource monitor


Hi,

Basically im after a little script or program that will email me if ever the system gets overloaded.

Anyone know of any?
 
Old 06-04-2003, 01:21 PM   #2
david_ross
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I don't know of one but if you mean like CPU usage then you could just write something to monitor the output from sar.
 
Old 06-06-2003, 04:04 PM   #3
Bilb
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I've tried with sar but still not the best with scripting,

I've tried doin
sar 2 5 > tmp0.log
chk=`tail -c 6 tmp0.log`

but I cant seem to get the if command to work with it.

I've also tried awk '/Average/ { t=$6 }' tmp0.log but with no luck

Last edited by Bilb; 06-06-2003 at 04:07 PM.
 
Old 06-09-2003, 01:40 PM   #4
david_ross
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Sorry - I've been away for a few days.

What is it you want to extract from the output?
 
Old 06-09-2003, 02:29 PM   #5
Bilb
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In the end I would like it to email me with the box IP if the CPU/'s gets overloaded.
 
Old 06-09-2003, 02:58 PM   #6
david_ross
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Here is a perl script
Code:
#!/usr/bin/perl

# Get the CPU usage
@sar = `sar 1 1`;

# Extract the average CPU usage
($ave) = $sar[@sar-1] =~ /.* (.*)\n/;

# If there is only 5% CPU available then...
if($ave < "5"){

# Get the ip info
@ipconf = `ifconfig`;

# Send the ip info
open(MAIL, "|/usr/lib/sendmail -t");
print MAIL "To: someone\@somewhere.com\n";
print MAIL "From: someone\@somewhere.com\n";
print MAIL "Subject: CPU running at over 90% CPU\n\n";
print MAIL @ipconf;
close(MAIL);
}

exit;
 
Old 06-10-2003, 09:58 AM   #7
Bilb
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Thx alot!
u've saved me a few more migraines

I'll give it a go when i get a mo
 
  


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