Nagios Monitors network traffic

System version

[Email protected] libexec]# cat/etc/redhat-release

CentOS Release 5.6 (Final)

1 Installing and configuring SNMP

1) Yum install net-snmp-utils Net-snmp net-snmp-libs-y

2) vi/etc/snmp/snmpd.conf

Remove the # numbers from the next two lines

#view mib2 included. Iso.org.dod.internet.mgmt.mib-2 FC

#view all included. 1 80

Put the following statement

Access Notconfiggroup "" Any noauth exact systemview none None

Switch

Access Notconfiggroup "" Any noauth exact mib2 none None

3) Start SNMP

/ETC/INIT.D/SNMPD start

2 Download Monitor Traffic script test

wget https://raw.githubusercontent.com/cloved/check_traffic/master/check_traffic.sh--no-check-certificate # #放到/ Under the Usr/local/nagios/libexec directory

chmod +x/usr/local/nagios/libexec/check_traffic.sh

Get NIC Information

[Email protected] libexec]#/check_traffic.sh-v 2c-c public-h localhost-l

List Interface for host localhost.

Interface index 1 orresponding to Lo

Interface index 2 orresponding to eth0

[Email protected] libexec]#./check_traffic.sh-v 2c-c public-h localhost-i 2-w 1000,1200-c 1400,1500-k-B # The 2 after-I is obtained by the above command

Ok-the traffic in are 0.11KB, out are 1.08KB, Total is 1.19KB. The Check Interval is 1526s | In=0.11kb;1000;1400;0;0 Out=1.08kb;1200;1500;0;0 Total=1.19kb;2200;2900;0;0 Interval=1526s;1200;1800;0;0

Define in and out values exceeding 1000K, 1200K warning, exceeding 1400k,1500k severity. (No output for first run, output after 30s)

3 Defining the check_traffic command on the monitored side

Vi/usr/local/nagios/etc/nrpe.cfg

Add to

Command[check_traffic]=/usr/local/nagios/libexec/check_traffic.sh-v 2c-c public-h 127.0.0.1-i 2-w 1000,1200-c 1400, 1500-k-B

4 Defining services on the monitoring side

VI.. /etc/objects/services.cfg

Add to

Define Service{

Use Generic-service

HOST_NAME localhost

Service_description Traffic

Check_command check_nrpe!check_traffic

}

5 Restart Service

Pkill Nrpe

/usr/local/nagios/bin/nrpe-c/usr/local/nagios/etc/nrpe.cfg-d

/etc/init.d/nagios Reload

6 Manual Test

[Email protected] libexec]#/usr/local/nagios/libexec/check_nrpe-h localhost-c check_traffic

Ok-the traffic in are 0.0KB, out are 0.24KB, Total is 0.24KB. The Check Interval is 135s | In=0.0kb;200;400;0;0 Out=0.24kb;300;500;0;0 Total=0.24kb;500;900;0;0 Interval=135s;1200;1800;0;0

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Nagios Monitors network traffic