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Full Discussion: False alerts
Top Forums Shell Programming and Scripting False alerts Post 302992336 by Don Cragun on Thursday 23rd of February 2017 09:36:19 PM
Old 02-23-2017
I don't have sar on the system I use, so it is hard to guess at what might be going on. Furthermore, since you don't preserve the value that is triggering your mail message, we have even less information.

You could reduce the load on your system a little bit, preserve the CPU load value, and get rid of the temp file by changing:
Code:
ALERT="monitoringbox@abc.com"
TEMPFILE=/tmp/temp1
HOSTNAME=`hostname`
rm -f $TEMPFILE
CPU_LOAD=`sar -P ALL 10 1 |grep Average' |awk -F" " '{print 100.0 -$NF}' |cut -d \. -f1`
if [[ $CPU_LOAD -gt $LIMIT ]];
then
echo "CPU is high on $HOSTNAME " >> $TEMPFILE
fi
if [ -e $TEMPFILE ]
then
mail -s " CPU ALERT  " $ALERT < $TEMPFILE
fi
rm -f $TEMPFILE

to:
Code:
ALERT="monitoringbox@abc.com"
HOSTNAME=`hostname`
CPU_LOAD=`sar -P ALL 10 1 | awk -F" " '/Average/{print int(100-$NF)}'`
if [[ $CPU_LOAD -gt $LIMIT ]]
then	echo "CPU is high ($CPU_LOAD) on $HOSTNAME" | mail -s " CPU ALERT" "$ALERT"
fi

Please try this and let us know what mail message you get when the CPU load is not high.
 

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LEARN ABOUT DEBIAN

pygm2n

pygm2n(1)						    Python Gateway mail to news 						 pygm2n(1)

NAME

       pygm2n - Python Gateway mail to news

SYNOPSIS

       pygm2n -n newsgroups [ -s newsserver ] [ -h ]

DESCRIPTION

       IMPORTANT: this man page is to be continued. The Whole pyg gateway is in devel. state.  try -h option for more detailed option.

       pygm2n reads from stdin an email, sending it to newsgroups, a comma separated list without spaces of newsgroup names (at least one), rfc799
       compliant.

       If pygm2n reads from stdin a sigle line starting with /, it is considered an absolute path to a single-email mailbox, so pygm2n	will  open
       and read it.

       Note that now pyg can't read a real mailbox, with many emails. If you give it in input, pyg will post the whole mailbox as a single email.

EXAMPLES

       There is some documetation in /urs/share/doc/pyg

       I  created  mailgate  user  (moderator of local.moderated ng).  Subscribe to a list with this user (or simply email one message to).  Every
       email posted to this user will send to newsgroups, in its .procmailrc I've put something like:

       :0 bh * ^From *mailinglist-request@lists.debian.org | $HOME/pygm2n -n local.debian.mailinglist

AUTHORS

       Cosimo Alfarano <alfarano@students.cs.unibo.it>

BUGS

       Boh. send any bug, advice or opinion to the author, please.

							  Sun Sep  12 18:10:00 CEST 2000						 pygm2n(1)
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