Setting up NRPE on Debian server » History » Revision 3
Revision 2 (Jamila Khan, 08/19/2014 05:09 PM) → Revision 3/6 (Jamila Khan, 08/19/2014 05:15 PM)
h1. Setting up NRPE on Debian server
{{>toc}}
Process:
h2. on client server
h3. Install NRPE
<pre>
aptitude install nagios-nrpe-server nagios-plugins-basic
</pre>
h3. Edit config file
<pre>
vim /etc/nagios/nrpe.cfg
</pre>
* Add IP_v4_of_Nagios_server to allowed_hosts
h3. start service
<pre>
service nagios-nrpe-server restart
</pre>
h3. check that service is running
<pre>
netstat -tpln | grep 5666
</pre>
h3. edit local config to add specified checks
<pre>
vim /etc/nagios/nrpe_local.cfg
</pre>
Add a NRPE test check, check and a disk check, and Apache SIGTERM check check.
<pre>
0 octavia:/etc/nagios# cat nrpe_local.cfg
######################################
# Do any local nrpe configuration here
######################################
command[check_nrpe_daemon]=/bin/echo "NRPE OK"
# disk checks
command[check_disk_root]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /dev/root
# checking Apache logs for SIGTERM
command[check_apache_sigterm]=/usr/lib/nagios/plugins/check_cat.sh /var/log/apache2/error.log SIGTERM 0
</pre>
h3. add check_cat
In /usr/lib/nagios/plugins create check_cat.sh
<pre>
#!/bin/bash
#
# checks in files if there are instances of a given string.
# $1 is the file
# $2 is the string
# $3 is the threshold, any more than $3 and it will be Critical
cnt=`cat $1|grep $2|wc -l`
recent=`cat $1|grep $2`
if [ $cnt -le $3 ] ; then
echo OK - no errors or warnings
exit 0
fi
echo -e "CRITICAL - String $2 appeared $cnt times\n$recent"
exit 2
</pre>
Make it executable
<pre>
chmod 755 /usr/lib/nagios/plugins/check_cat.sh
</pre>
h3. restart service
<pre>
service nagios-nrpe-server restart
</pre>
h2. on monitoring server
h3. test connection
On Nagios/Icinga server test that that worked:
<pre>
/usr/lib/nagios/plugins/check_nrpe -H clientserveruri.com -c check_nrpe_daemon
NRPE OK
</pre>
h3. set up checks.
example service config file
<pre>
###############################################################################
###############################################################################
#
# SERVICE DEFINITIONS
#
###############################################################################
###############################################################################
define service{
use generic-service ; Inherit default values from a template
host_name clientserver
service_description SSH
check_command check_ssh
}
define service{
use generic-service ; Inherit default values from a template
host_name clientserver
service_description HTTP
check_command check_http
}
define service{
use generic-service ; Inherit default values from a template
host_name clientserver
service_description Users
check_command check_nrpe_1arg!check_users
}
define service{
use generic-service ; Inherit default values from a template
host_name clientserver
service_description Load
check_command check_nrpe_1arg!check_load
}
define service{
use generic-service ; Inherit default values from a template
host_name clientserver
service_description Zombie Processes
check_command check_nrpe_1arg!check_zombie_procs
}
define service{
use generic-service ; Inherit default values from a template
host_name clientserver
service_description Total Processes
check_command check_nrpe_1arg!check_total_procs
}
define service{
use generic-service ; Inherit default values from a template
host_name clientserver
service_description Disk Space /root
check_command check_nrpe_1arg!check_disk_root
}
define service{
use generic-service ; Inherit default values from a template
host_name clientserver
service_description Apache SIGTERM
check_command check_nrpe_1arg!check_apache_sigterm
}
</pre>
h3. restart monitoring service
for icinga
<pre>
/etc/init.d/icinga restart
</pre>
sources:
http://xmodulo.com/2014/03/nagios-remote-plugin-executor-nrpe-linux.html
https://wiki.icinga.org/display/howtos/Setting+up+NRPE+with+Icinga
Go to top