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
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
- yum install rrdtool -y
三、安装配置net-snmp
1、安装net-snmp
- yum install net-snmp net-snmp-libs net-snmp-utils
2、配置net-snmp
在/etc/snmp/snmpd.conf中修改：
- view systemview included .1.3.6.1.2.1.1
为：
- view systemview included .1.3.6.1.2.1
3、测试net-snmp
- # 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
五、安装LAMP
- 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
四、安装cacti
1、下载cacti
- cd /tmp
- wget http://www.cacti.net/downloads/cacti-0.8.8a.tar.gz
- tar xzf cacti-0.8.8a.tar.gz
- mv cacti-0.8.8a /var/www/html/cacti
- cd /var/www/html/cacti
2、创建数据库
- mysqladmin --user=root -p create cacti
3、导入数据库
- mysql -uroot -p cacti < cacti.sql
4、创建数据库用户
- shell> mysql -uroot -p mysql
- mysql> GRANT ALL ON cacti.* TO cactiuser@localhost IDENTIFIED BY 'cactipassword';
- mysql> flush privileges;
5、配置include/config.php
- $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
- useradd cactiuser
- chown -R cactiuser rra/ log/
7、配置计划任务
- echo "*/5 * * * * cactiuser php /var/www/html/cacti/poller.php > /dev/null 2>&1">>/etc/crontab
- service crond restart