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，snmp需要的变量数据是通过读取mysql数据库得到，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。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，它能够存储的数据笔数在创建时就已经定义。
SNMP用来收集数据
Rrdtool用来存储数据和生成图表
MySQL用来配合PHP程序存储一些变量数据并对变量数据进行调用。
LAMP环境参考《lnmp、lamp、lnmpa一键安装包》
Caccti安装及配置#!/bin/bash
#by LinuxEye
#BLOG: https://linuxeye.com
yum -y install cairo-devel libxml2-devel pango pango-devel net-snmp*
cd /root/cacti
tar xzf rrdtool-1.4.7.tar.gz
cd rrdtool-1.4.7
./configure --prefix=/usr/local/rrdtool
make && make install
ln -s /usr/local/rrdtool/bin/* /usr/local/bin/
cd ../
cat >> /etc/snmp/snmpd.conf << EOF
com2sec local 127.0.0.1 public
com2sec local 192.168.22.0/24 public
group MyROGroup v1 local
group MyROGroup v2c local
group MyROGroup usm local
view all included .1 80
access MyROGroup "" any noauth exact all none nones
yslocation (/etc/snmpd/snmpd.conf)
syscontact Root
EOF
tar xzf cacti-0.8.7i.tar.gz
mv cacti-0.8.7i /usr/local/apache/htdocs/
/usr/local/mysql/bin/mysql -uroot -padmin -e "create database cacti;"
/usr/local/mysql/bin/mysql -uroot -padmin -e "grant all privileges on cacti.* to cacti@'localhost' identified by 'cacti123' with grant option;"
/usr/local/mysql/bin/mysql -uroot -padmin -e "flush privileges;"
/usr/local/mysql/bin/mysql -ucacti -pcacti123 --database cacti < /usr/local/apache/htdocs/cacti/cacti.sql
sed -i 's@$database_username =.*$@$database_username = "cacti";@g' /usr/local/apache/htdocs/cacti/include/config.php
sed -i 's@$database_password =.*$@$database_password = "cacti123";@g' /usr/local/apache/htdocs/cacti/include/config.php
tar xzf cacti-spine-0.8.7i.tar.gz
cd cacti-spine-0.8.7i
./configure --prefix=/usr/local/spine --with-mysql=/usr/local/mysql --with-snmp=/usr/local/net-snmp
make && make install
mv /usr/local/spine/etc/spine.conf.dist /usr/local/spine/etc/spine.conf
sed -i 's@DB_User cactiuser@DB_User cacti@g' /usr/local/spine/etc/spine.conf
sed -i 's@DB_Pass cactiuser@DB_Pass cacti123@g' /usr/local/spine/etc/spine.conf
#Console>Settings>Poller>PollerType，有两个选项：cmd.php和spine，选择[spine]。Console -> Configuration ->Settings -> Paths -> Alternate Poller Path -> Spine Poller File Path，将“/usr/local/spine/bin/spine”填入文本框，选择spine是为了加快速度，cmd.php是一个php写的调度程序，而
spine是用C写的，spine的性能远远优于cmd.php，当监控的设备有很多时，cmd.php的性能就跟不上
