cacti简单部署，以及简单监控
系统centos6.4mini版下载epel的yum源：
wget http://mirrors.aliyun.com/repo/epel-6.repo
安装必要的包：
httpd:
yum -y install httpd
mysql
yum -y install mysql mysql-server
php
yum -y install php-mysql php-pear php-common php-gd php php-mbstring php-cli
yum -y install php-snmp
yum -y install net-snmp-utils net-snmp-libs
yum -y install rrdtool
启动服务：
service httpd start
service mysqld start
service snmpd start
chkconfig httpd on
chkconfig mysqld on
chkconfig snmpd on
安装cacti：
yum -y install cacti
导入cacti表数据
mysql>grant all privileges on *.* to 'root'@'localhost' identified by 'redhat';
mysql>flush privileges;
mysql>create database cacti;
mysql>grant all privileges on cacti.* to 'cacti'@'localhost' identified by 'redhat';
mysql>flush privileges;
rpm -ql cacti|grep cacti.sql
mysql -ucacti -p cacti < /usr/share/doc/cacti-0.8.8h/cacti.sql
修改配置文件：
/etc/cacti/db.php将cacti数据库信息修改
$database_type = "mysql";
$database_default = "cacti";
$database_hostname = "localhost";
$database_username = "cacti";
$database_password = "redhat";
$database_port = "3306";
$database_ssl = false;
修改httpd服务对cacti网页目录的支持
配置/etc/httpd/con.d/cacti.conf
# httpd 2.4
Require host localhost
# httpd 2.2
Order deny,allow
Deny from all
Allow from 192.168.1.0/24----->对本机ip网段进行允许
Allow from 192.168.46.0/24---->对远端节点网段进行允许
修改vim /etc/php.ini的时区
date.timezone = Asia/Shanghai
service httpd restart
修改cacti目录下的属主属组
cd /usr/share/cacti
chown -R cacti:cacti rra/ log/
注释掉：/etc/cron.d/cacti的#，将定时任务开启
输入浏览器http://192.168.1.110/cacti进行安装
cacti工作原理：
数据检索---》poller
数据存储---》RRDTool
数据展示
安装服务参考如下：
http://idroot.net/tutorials/how-to-install-cacti-on-centos-6/
http://www.cacti.net/downloads/docs/pdf/manual.pdf
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