Custom drawing templates:
[root@RHEL5 ~]# cd /usr/local/pnp4nagios/share/templates/
[root@RHEL5 templates]# vi check_cpu.php
<?php
#-----The Color of The Three Primary Colors-----
$colors = array(
'red' => '#FF0000',
'green' => '#00FF00',
'blue' => '#0000FF',
'yellow' => '#FFFF00',
'black' => '#000000',
'deepred' => '#330000',
);
#------------------Image Title------------------
$opt[1] = "--title \"CPU_Load For $hostname / $servicedesc\" ";
#-------------1 Minutes Average Load------------
$def[1] = "DEF:var1=$RRDFILE[1]:$DS[1]:AVERAGE " ;
$def[1] .= "HRULE:$WARN[1]#00FF00 ";
$def[1] .= "HRULE:$CRIT[1]#FF0000 ";
$def[1] .= "LINE1:var1#0000FF:\"1-Mins \" " ;
$def[1] .= "GPRINT:var1:MIN:\"%3.4lg %s$UNIT[1] Min \\t\" ";
$def[1] .= "GPRINT:var1:MAX:\"%3.4lg %s$UNIT[1] Max \\t\" ";
$def[1] .= "GPRINT:var1:AVERAGE:\"%3.4lg %s$UNIT[1] Average \\n\" ";
#-------------15 Minutes Average Load-----------
$def[1] .= "DEF:var2=$RRDFILE[2]:$DS[2]:AVERAGE " ;
$def[1] .= "LINE2:var2$colors[black]:\"15-Mins \" " ;
$def[1] .= "GPRINT:var2:MIN:\"%3.4lg Min \\t\" ";
$def[1] .= "GPRINT:var2:MAX:\"%3.4lg Max \\t\" ";
$def[1] .= "GPRINT:var2:AVERAGE:\"%3.4lg Average \\n\" ";
?>
[root@RHEL5 templates]# chown nagios:nagios *
Monitoring plugin:
[root@RHEL5 ~]# tail -n 2 /etc/nagios/resource.cfg
#Add by Kingcraft
$USER5$=/usr/local/nagios/customexec
[root@RHEL5 ~]# vi /usr/local/nagios/customexec/check_cpu.sh
#!/bin/sh
#Author:zhai_kang,20131026
WARN=$2
CRIT=$4
#1 minutes load,15 minutes load
Load_One=`uptime | awk -F "[:]" '{print $NF}' | awk -F "[,]" '{print $1}'`
Load_Fifteen=`uptime | awk -F "[:]" '{print $NF}' | awk -F "[,]" '{print $3}'`
#to obtain Max value
Max=$Load_One
SIGN=`echo $Max $Load_Fifteen | awk '{if($1<$2)print 1;else print 0}'`
if [[ $SIGN -ge 1 ]]
then
Max=$Load_Fifteen
fi
#get return data
SIGN_C=`echo $CRIT $Max | awk '{if($1<$2)print 1;else print 0}'`
SIGN_W=`echo $WARN $Max | awk '{if($1<$2)print 1;else print 0}'`
SIGN_O=`echo 0 $Max | awk '{if($1<$2)print 1;else print 0}'`
if [[ $SIGN_C -eq 1 ]]
then
line=`echo "Critical : 1-Mins = $Load_One; 15-Mins = $Load_Fifteen"`
RC=2
elif [[ $SIGN_W -eq 1 ]]
then
line=`echo "Warning : 1-Mins = $Load_One; 15-Mins = $Load_Fifteen"`
RC=1
elif [[ $SIGN_O -eq 1 ]]
then
line=`echo "OK : 1-Mins = $Load_One; 15-Mins = $Load_Fifteen"`
RC=0
else
line=`echo "Unknown"`
RC=3
fi
echo $line \| CPU_Load="$Load_One;$WARN;$CRIT" CPU_Load="$Load_Fifteen"
exit $RC
Define the monitoring command:
[root@RHEL5 ~]# vi /etc/nagios/objects/commands.cfg
define command{
command_name check_cpu
command_line $USER5$/check_cpu.sh -w $ARG1$ -c $ARG2$
}
Definition monitor file:
[root@RHEL5 ~]# vi /etc/nagios/Linuxhosts/localhost.cfg
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_cpu
check_command check_cpu!2!3
}
Restart:
[root@RHEL5 ~]# service nagios restart
Verification:
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