CentOS安装cacti

1.安装软件包

1. yum install -y httpd php php-mysql
2. php-snmp mysql mysql-server
3. perl-DBD-MySQL php-pdo net-snmp
4. net-snmp-libs net-snmp-utils rrdtool

2.启动相关服务

1. service httpd start
2. service mysqld start
3. service snmpd start
4. chkconfig httpd on
5. chkconfig mysqld on
6. chkconfig snmpd on

3.下载cacti

1. wget -O /tmp/cacti-0.8.7e.tar.gz http://www.cacti.net/downloads/cacti-0.8.7e.tar.gz
2. mkdir /home/cacti
3. tar -xzvf /tmp/cacti-0.8.7e.tar.gz -C /home/cacti
4. mv /home/cacti/cacti-0.8.7e /home/cacti/htdocs

4.向db添加cacti账号

1. CREATE USER 'cactiuser' IDENTIFIED BY 'yourpassword';
2. GRANT ALL PRIVILEGES ON cacti.* TO cactiuser@'localhost' IDENTIFIED BY 'yourpassword' WITH GRANT OPTION;
3. FLUSH PRIVILEGES;

5.导入cacti的数据结构

1. echo "source /home/cacti/htdocs/cacti.sql" | mysql -ucactiuser -pcactiuser cacti

6.配置apache

1. cat > /etc/httpd/conf.d/cacti.conf <<EOF
2. <VirtualHost *:80>
3. DocumentRoot /home/cacti/htdocs/
4. ServerName cacti.opstool.com
5. CustomLog /home/cacti/logs/access_log combined
6. ErrorLog /home/cacti/logs/error_log
7. </VirtualHost>
8. EOF
9. service httpd restart

7.添加crond任务

1. mkdir /home/cacti/conf
2. cat > /home/cacti/conf/cacti <<EOF
3. */5 * * * * apache /usr/bin/php /home/cacti/htdocs/poller.php &>/dev/null
4. EOF
5. ln -sf /home/cacti/conf/cacti /etc/cron.d/
6. service crond reload

8.登录http://cacti.opstool.com
使用默认的用户名密码admin/admin登录，第一次登录后会提示修改密码。

问题：
1.graphs显示无图
原因：cacti中设置rrdtool的版本与系统实际安装的版本不一样。进入cacti，点击console-Settings，然后设置RRDTool Utility Version，选择与系统的一致。如果系统rrdtool版本比cacti中最高的版本还高，那只能选择cacti中支持的最高rrdtool版本尝试一下，如果不行要么考虑cacti升级，要么rrdtool降级，以保证兼容.