监控网络神器---Cacti 安装与配置(1)(4)

2.安装net-snmp

RedHat默认安装了SNMP服务，但好象没有snmpwalk,snmpget这两个命令，所以需要编译安装NET-SNMP。

NET-SNMP官方网站：http://www.net-snmp.org/

# tar zxvf net-snmp-5.2.4.tar.gz

#cd net-snmp-5.2.4

#./configure --prefix=/usr/local/net-snmp --enable-developer

#make

#make install

# ln –s /usr/local/net-snmp/bin/* /usr/local/bin/

#cp EXAMPLE.conf /usr/local/net-snmp/share/snmp/snmpd.conf

//修改snmpd.conf(修改COMMUNITY、允许抓取snmp数据的主机、抓取数据范围等)。

# /usr/local/net-snmp/sbin/snmpd //启动SNMP服务

# vi /etc/rc.d/rc.local

//在rc.local上加入一行/usr/local/net-snmp/sbin/snmpd,系统启动时启动SNMP服务。

3.安装Cacti

Cacti官方网站：www.cacti.net/

# tar –zxvf cacti-0.8.6j.tar.gz

# mv –r cacti-0.8.6j /usr/loca/apache/htdocs/cacti

# vi /usr/local/apache/htdocs/cacti/include/config.php

$database_type = "mysql";

$database_default = "cacti";

$database_hostname = "localhost";

$database_username = "cacti";

$database_password = "cacti";

//添加cacti用户

# useradd cacti

//将rra目录的所有权给cacti用户

# chown –R cacti /usr/loca/apache/htdocs/cacti/rra

//修改cacti目录所属组

# chgrp –R cacti /usr/loca/apache/htdocs/cacti

//为cacti用户添加cron任务

# su – cacti

# crontab –e

*/5 * * * * /usr/local/bin/php /usr/local/apache/htdocs/cacti/poller.php > /dev/null 2>&1

注意：首次执行poller.php时请使用cacti用户，否则生成的rrd文件cacti将没有写入权限。

　　4.安装Cactid

CACTID 的安装需要以下支持：

o net-snmp-devel (需要编译安装net-snmp时添加--enable-developer选项)

o mysql

o mysql-devel (mysql源文件编译安装后默认支持)

o openssl-devel (Redhat默认安装)

# tar -zxvf cacti-cactid-0.8.6i.tar.gz

# cd cacti-cactid-0.8.6i

# ./configure --with-mysql=/usr/local/mysql --with-snmp=/usr/local/net-snmp

# make

//这时你将在此目录下看到多出了cactid、cactid.conf两个文件

# mkdir /usr/local/cactid

# cp cactid cactid.conf /usr/local/cactid

# vi /usr/local/cactid/cactid.conf //修改cactid配置文件

DB_Host 127.0.0.1

DB_Database cacti

DB_User cacti

DB_Pass cacti

5.数据库配置

#mysql –uroot –p

Password:

mysql> create database cacti;

Query OK, 1 row affected (0.00 sec)

mysql> grant all on cacti.* to cacti@localhost identified by “cacti”;

Query OK, 1 row affected (0.00 sec)

mysql>exit

# cd /usr/local/apache/htdocs/cacti

# mysql –uroot –p cacti < cacti.sql

Password: