nagios监控网络

1、安装修改启动snmpd服务

方法一：安装：[root@nagios nagios]# yum -y install net-snmp*

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

Setting up Install Process

Package 1:net-snmp-devel-5.3.2.2-9.el5_5.1.i386 already
installed and latest version

Package 1:net-snmp-libs-5.3.2.2-9.el5_5.1.i386 already installed
and latest version

Package 1:net-snmp-utils-5.3.2.2-9.el5_5.1.i386 already
installed and latest version

Package 1:net-snmp-perl-5.3.2.2-9.el5_5.1.i386 already installed
and latest version

Package 1:net-snmp-5.3.2.2-9.el5_5.1.i386 already installed and
latest version

Nothing to do

#我已经安装过了。。就上面这些包了。。

方法二：

安装snmp

rpm -ivh net-snmp-5.3.2.2-9.el5.x86_64.rpm
net-snmp-devel-5.3.2.2-9.el5.i386.rpm
net-snmp-devel-5.3.2.2-9.el5.x86_64.rpm
net-snmp-libs-5.3.2.2-9.el5.x86_64.rpm
net-snmp-libs-5.3.2.2-9.el5.i386.rpm
net-snmp-perl-5.3.2.2-9.el5.x86_64.rpm
net-snmp-utils-5.3.2.2-9.el5.x86_64.rpm
beecrypt-4.1.2-10.1.1.i386.rpm
elfutils-devel-0.137-3.el5.x86_64.rpm
elfutils-devel-static-0.137-3.el5.x86_64.rpm
beecrypt-devel-4.1.2-10.1.1.i386.rpm
beecrypt-devel-4.1.2-10.1.1.x86_64.rpm
lm_sensors-devel-2.10.7-9.el5.i386.rpm
lm_sensors-devel-2.10.7-9.el5.x86_64.rpm
lm_sensors-2.10.7-9.el5.i386.rpm lm_sensors-2.10.7-9.el5.x86_64.rpm
libsysfs-2.0.0-6.i386.rpm beecrypt-4.1.2-10.1.1.i386.rpm
beecrypt-4.1.2-10.1.1.x86_64.rpm

rpm -ivh lm_sensors-2.10.7-9.el5.x86_64.rpm

rpm -ivh lm_sensors-devel-2.10.7-9.el5.x86_64.rpm

rpm -ivh net-snmp-5.3.2.2-9.el5.x86_64.rpm

rpm -ivh net-snmp-utils-5.3.2.2-9.el5.x86_64.rpm

rpm -ivh net-snmp-perl-5.3.2.2-9.el5.x86_64.rpm

service snmpd restart

修改snmpd.conf

vim /etc/snmp/snmpd.conf

# sec.name source community

com2sec notConfigUser 127.0.0.1（localhost也可不改） public（共同体名）

# group context sec.model sec.level prefix read write notif

access notConfigGroup “” any noauth exact mib2 none none

#改system为mib2

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

#去掉前面的”#”注释符

2、上传插件被授权

上传check_traffic.sh至/usr/local/nagios/libexec

改属主为：nagios

chown nagios.nagios ./check_traffic.sh

chmod +x check_traffic.sh

3、网卡参数检测：

[root@OAServer etc]# /usr/local/nagios/libexec/check_traffic.sh
-V 2c -C public -H 127.0.0.1 -L

List Interface for host 127.0.0.1.

Interface index 1 orresponding to lo

Interface index 2 orresponding to bond0

Interface index 3 orresponding to eth0

Interface index 4 orresponding to eth1

Interface index 5 orresponding to sit0

可以测试是否能够正常采集到数据

/usr/local/nagios/libexec/check_traffic.sh -V 2c -C public -H
127.0.0.1 -I 2 -w 1200,1500 -c 1700,1800 -K -b

OK – The Traffic In is 356Kbps, Out is 414Kbps, Total is
770Kbps. The Check Interval is 30s |In=356Kbps;1200;1700;0;0
Out=414Kbps;1500;1800;0;0 Total=770Kbps;2700;3500;0;0
Interval=30s;1200;1800;0;0

注：-V snmp协议版本

-C 共同体名

-I 参数对应上面-L输出的网卡index值。标示监视相应的网卡。

该插件其它使用方法及各参数解释详情”-help”或者看上面论坛石头描述

//更改/var/tmp/check_traffic* 文件权限为nagios用户可读写。简单的给个777吧。。

//chmod 777
/var/tmp/check_traffic_127.0.0.1_2.hist_dat_root__32

4、 更改nrpe.cfg增加如下行：

command[check_traffic]=/usr/local/nagios/libexec/check_traffic.sh
-V 2c -C public -H 127.0.0.1 -I 2 -w 300,350 -c 500,600 -K -B

重启nrpe程序

[root@OAServer ~]# ps aux |grep nrpe

nagios 2822 0.0 0.0 4808 1448 ? Ss Jun01 0:04
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

root 1123 0.0 0.0 5936 736 pts/2 S+ 11:02 0:00 grep nrpe

[root@OAServer ~]# kill -9 2822

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

或service xinetd restart

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5、nagios服务器（监控端）编辑service.cfg增加监控网卡流量项目；

define service {

host_name 241-server

service_description check_traffic

check_period 24x7

max_check_attempts 4

normal_check_interval 3

retry_check_interval 2

contact_groups sagroup

notification_interval 10

notification_period 24x7

notification_options w,u,c,r

check_command check_nrpe!check_traffic

}

参数解析：

# -v

#
Verbose mode, to debug some messages out to the /tmp directory with
log file name check_traffic.$$.

#

# -V
1|2c|3

#
Specify the version of snmp

#

# -C
Community

#
Specify the Community

#

# -H
host

#
Specify the host

#

# -6 Use 64
bit counter, ifHC* instead of if*.

#

# -r Use
Range instead of single value in warning and critical
Threshold;

#

# -I
interface

#
Specify the interface

#

# -L List all
Interfaces on specify host

#

# -B/b Switch to B/s or bps, default is -b,
bps

#

# -K/M Switch to K or M (bsp,B/s), default is
-K

#

# -w Warning
value Kbps, in and out

# -c Critical
value Kbps, in and out

#
Set Warning and Critical Traffic value

# -F
s/S

#
Simple or more simple output format

#

# -p
number

#
It is a number that we comare this time value with the average
value of previos N times we had been checked.

#

# -i
suffix

#
It's the individual suffix with the CF/STAT_HIST_DATA if
necessary.

rpm -ivh net-snmp-5.3.2.2-9.el5.x86_64.rpm
net-snmp-devel-5.3.2.2-9.el5.i386.rpm
net-snmp-devel-5.3.2.2-9.el5.x86_64.rpm
net-snmp-libs-5.3.2.2-9.el5.x86_64.rpm
net-snmp-libs-5.3.2.2-9.el5.i386.rpm
net-snmp-perl-5.3.2.2-9.el5.x86_64.rpm
net-snmp-utils-5.3.2.2-9.el5.x86_64.rpm
beecrypt-4.1.2-10.1.1.i386.rpm
elfutils-devel-0.137-3.el5.x86_64.rpm
elfutils-devel-static-0.137-3.el5.x86_64.rpm
beecrypt-devel-4.1.2-10.1.1.i386.rpm
beecrypt-devel-4.1.2-10.1.1.x86_64.rpm
lm_sensors-devel-2.10.7-9.el5.i386.rpm
lm_sensors-devel-2.10.7-9.el5.x86_64.rpm
lm_sensors-2.10.7-9.el5.i386.rpm lm_sensors-2.10.7-9.el5.x86_64.rpm
libsysfs-2.0.0-6.i386.rpm beecrypt-4.1.2-10.1.1.i386.rpm
beecrypt-4.1.2-10.1.1.x86_64.rpm
elfutils-libelf-devel-0.137-3.el5.i386.rpm
rpm-devel-4.4.2.3-18.el5.x86_64.rpm
elfutils-libelf-devel-0.137-3.el5.x86_64.rpm
elfutils-libelf-devel-0.137-3.el5.x86_64.rpm
elfutils-libelf-devel-static-0.137-3.el5.i386.rpm
elfutils-libelf-devel-static-0.137-3.el5.x86_64.rpm
nss-devel-3.12.3.99.3-1.el5.centos.2.i386.rpm
sqlite-devel-3.3.6-5.x86_64.rpm nspr-devel-4.7.6-1.el5_4.i386.rpm
elfutils-libelf-0.137-3.el5.i386.rpm
elfutils-libs-0.137-3.el5.x86_64.rpm

993 rpm -ivh
lm_sensors-2.10.7-9.el5.x86_64.rpm

994 rpm -ivh
lm_sensors-devel-2.10.7-9.el5.x86_64.rpm

995 rpm -vih
net-snmp-5.3.2.2-9.el5.x86_64.rpm

996 rpm -vih
net-snmp-utils-5.3.2.2-9.el5.x86_64.rpm

997 rpm -vih
net-snmp-perl-5.3.2.2-9.el5.x86_64.rpm

998 service snmpd restart

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