Linux CentOS5.5 安装MRTG 实现网卡流量监控

一.安装snmp和mrtg

yum -y sysstat install net-snmp net-snmp-utils net-snmp-devel mrtg http

二.使用snmpconf命令配置SNMP

[root@bogon ~]# snmpconf

The following installed configuration files were found:

1: /etc/snmp/snmpd.conf

Would you like me to read them in? Their content will be merged with the

output files created by this session.

Valid answer examples: "all", "none","3","1,2,5"

Read in which (default = all): 1

选择要修改的snmp配置文件

I can create the following types of configuration files for you.

Select the file type you wish to create:

(you can create more than one as you run this program)

1: snmpd.conf

2: snmptrapd.conf

3: snmp.conf

Other options: quit

Select File: 1

修改后的文件存放在当前目录下，并命名为snmpd.conf

The configuration information which can be put into snmpd.conf is divided

into sections. Select a configuration section for snmpd.conf

that you wish to create:

1: Trap Destinations

2: Access Control Setup

3: Monitor Various Aspects of the Running Host

4: Agent Operating Mode

5: Extending the Agent

6: System Information Setup

Other options: finished

Select section: 2

添加可用的帐号

Section: Access Control Setup

Description:

This section defines who is allowed to talk to your running

snmp agent.

Select from:

1: a SNMPv3 read-write user

2: a SNMPv3 read-only user

3: a SNMPv1/SNMPv2c read-only access community name

4: a SNMPv1/SNMPv2c read-write access community name

Other options: finished, list

Select section: 3

添加基于SNMPv1/SNMPv2版本协议的只读权限帐号

Configuring: rocommunity

Description:

a SNMPv1/SNMPv2c read-only access community name

arguments: community [default|hostname|network/bits] [oid]

The community name to add read-only access for: local

此帐号的名称为local

The hostname or network address to accept this community name from [RETURN for all]: 127.0.0.1

此帐号只允许通过127.0.0.1这个地址登录，也就是不允许本机以外的服务器通过local得到SNMP信息

The OID that this community should be restricted to [RETURN for no-restriction]: <Enter>

直接回车，不输入任何OID，表示此帐号可以访问本机所有的SNMP信息

Finished Output: rocommunity local 127.0.0.1

Section: Access Control Setup

Description:

This section defines who is allowed to talk to your running

snmp agent.

Select from:

1: a SNMPv3 read-write user

2: a SNMPv3 read-only user

3: a SNMPv1/SNMPv2c read-only access community name

4: a SNMPv1/SNMPv2c read-write access community name

Other options: finished, list

Select section: 3

添加基于SNMPv1/SNMPv2版本协议的只读权限帐号

Configuring: rocommunity

Description:

a SNMPv1/SNMPv2c read-only access community name

arguments: community [default|hostname|network/bits] [oid]

The community name to add read-only access for: mynet

此帐号的名称为mynet

The hostname or network address to accept this community name from [RETURN for all]: 172.29.141.0/24

此帐号只允许通过172.29.141.0/24这个网段登录

The OID that this community should be restricted to [RETURN for no-restriction]: 1.3.6.1.2.1.1

此帐号只能访问服务器中OID编号为1.3.6.1.2.1.1的SNMP信息

Finished Output: rocommunity mynet 172.29.141.0/24 1.3.6.1.2.1.1

Section: Access Control Setup

Description:

This section defines who is allowed to talk to your running

snmp agent.

Select from:

1: a SNMPv3 read-write user

2: a SNMPv3 read-only user

3: a SNMPv1/SNMPv2c read-only access community name

4: a SNMPv1/SNMPv2c read-write access community name

Other options: finished, list

Select section: finished

输入 finished

The configuration information which can be put into snmpd.conf is divided

into sections. Select a configuration section for snmpd.conf

that you wish to create:

1: Trap Destinations

2: Access Control Setup

3: Monitor Various Aspects of the Running Host

4: Agent Operating Mode

5: Extending the Agent

6: System Information Setup

Other options: finished

Select section: finished

输入 finished

I can create the following types of configuration files for you.

Select the file type you wish to create:

(you can create more than one as you run this program)

1: snmpd.conf

2: snmptrapd.conf

3: snmp.conf

Other options: quit

Select File: quit

输入 quit

The following files were created:

snmpd.conf

These files should be moved to /usr/share/snmp if you

want them used by everyone on the system. In the future, if you add

the -i option to the command line I'll copy them there automatically for you.

Or, if you want them for your personal use only, copy them to

/root/.snmp . In the future, if you add the -p option to the

command line I'll copy them there automatically for you.

三.启动SNMP

mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.bak

mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.bak

/etc/init.d/snmpd restart

chkconfig snmpd on

四.配置MRTG

1. cfgmaker --global "WorkDir: /var/www/html" --global "Options[_]: growright,bits" --ifref=name local@127.0.0.1 > /etc/mrtg/mrtg.cfg

生成新的MRTG配置文件，通过local登录127.0.0.1，并依据网卡设备名进行数据流量统计,统计的时间轴从右到作推移，并以bit为单位，统计的结果数据存放在/var/www/html中

2.indexmaker /etc/mrtg/mrtg.cfg > /var/www/html/mrtg.html

通过/etc/mrtg/mrtg.cfg这个配置文件生成用于http访问的页面文件mrtg.html

3.vi /etc/cron.d/mrtg 输入

*/1 * * * * root LANG=C LC_ALL=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg --lock-file /var/lock/mrtg/mrtg_l --confcache-file /var/lib/mrtg/mrtg.ok

4.执行三次

LANG=C LC_ALL=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg --lock-file /var/lock/mrtg/mrtg_l --confcache-file /var/lib/mrtg/mrtg.ok

5.修改 /etc/httpd/conf.d/mrtg.conf ，去掉 “Allow from " 前面的 #

6.执行 /etc/init.d/httpd restart 开启 httpd服务器

注意，如果已经有 其他web server占用80端口，则不能开启httpd

五.打开 浏览器，输入 http://127.0.0.1/mrtg.html 可看到统计结果

声明：本文档可以随意更改，但必须署名原作者


作者：凤凰舞者 qq:578989855