If you just want to check that the process is running on the machine, here's a
sample bash script that I worked up:
#!/bin/bash
# This script makes sure certain processes are running and emails support if
they aren't
# What process to check for
PROCESS=tomcat
# The command to run
COMMAND=$(ps -ef| grep $PROCESS| grep -v grep| wc -l)
OUTPUT=$COMMAND
# Set the most number of messages we want sent before we stop sending them
ATMOST=3
EMAILFILE=/path/to/wherever/scripts/emailsSent.txt
# Lets check to see if that file exists and if not, create it
if [ ! -f $EMAILFILE ]
then
# The file does not exist, we better create it
echo 0 > $EMAILFILE
fi
if [ $OUTPUT == 0 ]
then
# Lets see if we already sent messages
NUMBER=$(cat $EMAILFILE)
if [ "$NUMBER" != 3 ]
then
# Go ahead and send the email
# The message that will go in the email
MESSAGE="The $PROCESS process doesn't seem to be running on $HOSTNAME on
$(date +"%x %r %Z") number is $NUMBER"
echo $MESSAGE | mail -s "$PROCESS process not running on $HOSTNAME"
[EMAIL PROTECTED]
# Now increment the number in the EMAILFILE file
NEWNUMBER=$(expr $NUMBER + 1)
echo $NEWNUMBER > $EMAILFILE
fi
else
# So the process is running, let's make sure the email messages increment
number is 0
if [ "$NUMBER" != 0 ]
then
echo 0 > $EMAILFILE
fi
fi
-----Original Message-----
From: Jean-Sebastien Pilon [mailto:[EMAIL PROTECTED]
Sent: Tuesday, February 20, 2007 7:17 AM
To: Tomcat Users List
Subject: RE: Monitoring of Tomcat process
You could write a script that wget's the applications home page for a
few iterations and that checks that the process is running and restart
it if no answer.
You could also use nagios with the check_http or with nrpe to check the
processes on the app server. See nagios.org on this one, this is quite a
bigger thing than the 1st solution if you do not have a monitoring
infrastructure with nagios already setup.
> -----Original Message-----
> From: Virgo Rustianto [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, February 20, 2007 6:51 AM
> To: [email protected]
> Subject: Monitoring of Tomcat process
>
> Hi there,
>
> Currently I am using Tomcat webserver 4.1.2, does any one know how to
> monitoring Tomcat webserver ? The reason is I facing problem
> almost everyday
> Tomcat was down, currently I don't know how to see does
> tomcat running or
> down.
> Normally after startup I can't see anything except customer
> care complaining
> our aplication doesn't works then we know tomcat must startup again.
>
> regards,
> Virgo Rustianto
>
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