Centos下安装Cacti(MRTG)

一、cacti概述

  1. cacti是用php语言实现的一个软件,它的主要功能是用snmp服务获取数据,然后用rrdtool储存和更新数据,当用户需要查看数据的时候用rrdtool生成图表呈现给用户。因此,snmp和rrdtool是cacti的关键。Snmp关系着数据的收集,rrdtool关系着数据存储和图表的生成。

  2. Mysql配合PHP程序存储一些变量数据并对变量数据进行调用,如:主机名、主机ip、snmp团体名、端口号、模板信息等变量。

  3. snmp抓到数据不是存储在mysql中,而是存在rrdtool生成的rrd文件中(在cacti根目录的rra文件夹下)。rrdtool对数据的更新和存储就是对rrd文件的处理,rrd文件是大小固定的档案文件(Round Robin Archive),它能够存储的数据笔数在创建时就已经定义。

二、安装rrdtool

添加EPEL仓库

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CentOS-5:
32位:
rpm -ivh http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.5.2-2.el5.rf.i386.rpm
64位:
rpm -ivh http://apt.sw.be/redhat/el5/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm
yum install rrdtool -y
CentOS-6:
32位:
rpm -ivh http://apt.sw.be/redhat/el6/en/i386/rpmforge/RPMS/rpmforge-release-0.5.2-2.el6.rf.i686.rpm
64位:
rpm -ivh http://apt.sw.be/redhat/el6/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm

或直接运行

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yum install epel-release
yum install rrdtool -y

三、安装配置net-snmp

1、安装net-snmp

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yum install net-snmp net-snmp-libs net-snmp-utils

2、配置net-snmp

在/etc/snmp/snmpd.conf中修改:

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view systemview included .1.3.6.1.2.1.1

为:

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view systemview included .1.3.6.1.2.1

3、测试net-snmp

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#service snmpd start
#snmpwalk -v 1 -c public localhost .1.3.6.1.2.1.1.1.0
SNMPv2-MIB::sysDescr.0 = STRING: Linux cronos 2.4.28 #2 SMP ven jan 14 14:12:01 CET 2005 i686

四、安装LAMP

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yum install httpd php php-mysql php-snmp php-xml php-gd mysql mysql-server
service httpd start
service mysqld start
mysqladmin -uroot password yourpassword
mysqladmin --user=root --password reload
```
## 五、安装cacti
### 1、下载cacti
``` bash
cd /tmp
wget http://www.cacti.net/downloads/cacti-0.8.8b.tar.gz
tar xvf cacti-0.8.8b.tar.gz
mv cacti-0.8.8b /var/www/html/cacti
cd /var/www/html/cacti

2、创建数据库

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mysqladmin --user=root -p create cacti

3、导入数据库

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mysql -uroot -p cacti < cacti.sql

4、创建数据库用户

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mysql -uroot -p mysql
mysql> GRANT ALL ON cacti.* TO cactiuser@localhost IDENTIFIED BY 'cactipassword';
mysql> flush privileges;

5、配置include/config.php

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$database_type = "mysql";
$database_default = "cacti";
$database_hostname = "localhost";
$database_username = "cactiuser";
$database_password = "cactipassword";
/* load up old style plugins here */
$plugins = array();
//$plugins[] = 'thold';
/*
Edit this to point to the default URL of your Cacti install
ex: if your cacti install as at http://serverip/cacti/ this
would be set to /cacti/
*/
$url_path = "/cacti/";
/* Default session name - Session name must contain alpha characters */
#$cacti_session_name = "Cacti";

6、设置目录权限

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useradd cactiuser
chown -R cactiuser rra/ log/

7、配置计划任务

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echo "*/5 * * * * cactiuser php /var/www/html/cacti/poller.php > /dev/null 2>&1">>/etc/crontab
(crontab -e)
service crond restart
service httpd restart

8、完成cacti的安装

(1) 在浏览器中输入:http://www.yourdomain.com/cacti/
默认用户名:admin 密码:admin
(2)更改密码
(3)设置cacti用到的命令路径