nagios監控網絡流量

系統版本

[root@localhost libexec]# cat /etc/redhat-release 

CentOS release 5.6 (Final)

1 安裝和配置snmp

1）yum install net-snmp-utils net-snmp net-snmp-libs -y

2）vi /etc/snmp/snmpd.conf

把下面兩行的#号去掉

#view mib2 included .iso.org.dod.internet.mgmt.mib-2 fc

#view all included .1           80

把下面的語句

access notConfigGroup "" any noauth exact systemview none none

改為：

access notConfigGroup "" any noauth exact mib2 none none

3） 啟動snmp

/etc/init.d/snmpd  start

2 下載下傳監控流量腳本測試

wget https://raw.githubusercontent.com/cloved/check_traffic/master/check_traffic.sh --no-check-certificate   ##放到/usr/local/nagios/libexec目錄下

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

擷取網卡資訊

[root@localhost 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   

[root@localhost libexec]#  ./check_traffic.sh -V 2c -C public -H localhost -I 2  -w 1000,1200 -c 1400,1500 -K -B    ## -I 後面的2 由上面的指令擷取

OK - The Traffic In is 0.11KB, Out is 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

定義in和out值分别超過1000K、1200K警告，超過1400K,1500k嚴重。（第一次運作沒有輸出，30s後再運作就有輸出）

3 在被監控端定義check_traffic指令

 vi /usr/local/nagios/etc/nrpe.cfg 

添加

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 在監控端定義服務

vi ../etc/objects/services.cfg   

define service{

        use                          generic-service

        host_name               localhost

        service_description          traffic

        check_command                check_nrpe!check_traffic

              }

5 重新開機服務

pkill nrpe 

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

/etc/init.d/nagios reload

6 手動測試

[root@localhost libexec]# /usr/local/nagios/libexec/check_nrpe -H localhost -c check_traffic