系统版本

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

CentOS release 5.6 (Final)

1 安装和配置snmp

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

2）vi /etc/snmp/snmpd.conf

把下面两行的#号去掉

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

#view all included .1           80

把下面的语句

access notConfigGroup "" any noauth exact systemview none none

改为：

access notConfigGroup "" any noauth exact mib2 none none

3） 启动snmp

/etc/init.d/snmpd  start

2 下载监控流量脚本测试

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

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

获取网卡信息

[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 后面的2 由上面的命令获取

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

定义in和out值分别超过1000K、1200K警告，超过1400K,1500k严重。（第一次运行没有输出，30s后再运行就有输出）

3 在被监控端定义check_traffic命令

 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 在监控端定义服务

vi ../etc/objects/services.cfg   

添加

define service{

        use                          generic-service

        host_name               localhost

        service_description          traffic

        check_command                check_nrpe!check_traffic

              }

5 重启服务

pkill nrpe 

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

/etc/init.d/nagios reload

6 手动测试

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

OK - The Traffic In is 0.0KB, Out is 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

nagios监控网络流量