Customplug(一)

Monitoring plugin：

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[root@RHEL5 ~]# cd /usr/local/nagios/
[root@RHEL5 nagios]# mkdir customexec
[root@RHEL5 nagios]# vi customexec/check_procs.sh

#!/bin/sh
#Author:zhai_kang,20131024
COUNT=`ps -ef | grep -v grep | grep $2 | wc -l`
PROC=`expr $COUNT - 2`
if [[ $PROC -ge $6 ]]
then
        line=`echo "Critical - PROC=$PROC"`
        RC=2
elif [[ $PROC -ge $4 ]]
then
        line=`echo "Warning - PROC=$PROC"`
        RC=1
elif [[ $PROC -ge 1 ]]
then
        line=`echo "OK - PROC=$PROC"`
        RC=0
else
        line=`echo "Unknown - PROC=null"`
        RC=3
fi
echo $line \| proc=$PROC
exit $RC

[root@RHEL5 nagios]# chown -R nagios:nagios customexec/
[root@RHEL5 nagios]# chmod +x customexec/check_procs.sh

Set the path to the plugins：
[root@RHEL5 nagios]# vi /etc/nagios/resource.cfg

#Add by Kingcraft
$USER5$=/usr/local/nagios/customexec

Integration of the PNP4Nagios and Nagios：
[root@RHEL5 nagios]# vi /etc/nagios/nagios.cfg

process_performance_data=1
host_perfdata_command=process-host-perfdata
service_perfdata_command=process-service-perfdata

[root@RHEL5 nagios]# vi /etc/nagios/objects/templates.cfg

#Add by Kingcraft
define host{
    name            host-pnp
    register        0
    action_url      /pnp4nagios/graph?host=$HOSTNAME$
    }
define service{
    name            srv-pnp
    register        0
    action_url      /pnp4nagios/graph?host=$HOSTNAME$&srv=$SERVICEDESC$
    }

Define the monitoring command：
[root@RHEL5 nagios]# vi /etc/nagios/objects/commands.cfg

define command{
　　　　command_name　　　process-host-perfdata
　　　　command_line　　　/usr/bin/perl /usr/local/pnp4nagios/libexec/process_perfdata.pl -d HOSTPERFDATA
}
define command{
　　　　command_name　　　process-service-perfdata
　　　　command_line      /usr/bin/perl /usr/local/pnp4nagios/libexec/process_perfdata.pl
}
define command{
        command_name    check_procs
        command_line    $USER5$/check_procs.sh -a $ARG1$ -w $ARG2$ -c $ARG3$
        }

Definition monitor file：
[root@RHEL5 nagios]# vi /etc/nagios/Linuxhosts/localhost.cfg

# Define a host for the local machine
define host{
        use                     linux-server,host-pnp
        host_name               Monitor
        alias                   Monitor
        address                 172.17.10.4
        }
define service{
        use                     local-service,srv-pnp
        host_name               Monitor
        service_description     check_procs
        check_command           check_procs!ndo2db!4!6
        }

Syntax checking && restart nagios：
[root@RHEL5 nagios]# /usr/local/nagios/bin/nagios -v /etc/nagios/nagios.cfg
[root@RHEL5 nagios]# service nagios restart

Verification：

Custom plug(一)

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