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In this posting you will be learning how to install Cacti on a freshly installed CentOS 6 system.

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Step 1 – Prerequisites

First we need to install some of the software packages needed for Cacti to run properly. Software which is not included or enabled in the base CentOS 6 installation are:

• rrdtool
• apache
• mysql
• cron
• gcc

Let’s use yum to get these installed.

Centos 6:
yum -y install mysql-server php php-cli php-mysql wget net-snmp-utils rrdtool \
  php-snmp gcc mysql-devel net-snmp-devel autoconf automake libtool dos2unix \ 

gcc and the devel packages are required for the installation of spine, hence that’s why we include it here.Now let’s make sure that our webserver and the database are automatically starting up after a reboot. Use the following commands to enable these:

chkconfig httpd on
chkconfig mysqld on
chkconfig crond on

Now that we did make sure that these services start after a reboot, let’s start them manually now in order to continue the installation. Cron may already be running so don’t panic if you don’t see the usual start message:

service httpd restart
service mysqld restart
service crond restart

Step 2 – Cacti Files

 Let’s now move to the actualy installation of Cacti. First we need to download and extract it. As of version 0.8.8, a fully patched Cacti including the Plugin Architecture (PIA) is officially available, so we’re downloading that one:

cd /var/www/html
wget http://www.cacti.net/downloads/cacti-0.8.8b.tar.gz
tar -xzvf cacti-0.8.8b.tar.gz

Cacti uses cron (scheduled task) in order to execute its polling process.  It’s always a good idea to run this under a special user. Let’s create the system “cacti” user now:

adduser cacti

Having done that, we can now  add a new cron entry to your system for a 5 minute polling interval using the following command:

echo "*/5 * * * * cacti php /var/www/html/cacti/poller.php &>/dev/null" >> /etc/cron.d/cacti

 Finally, we also need to make sure that the permissions on the log and rra directories are set correctly:

 cd /var/www/html/cacti
chown -R cacti.apache rra log
chmod 775 rra log

Now we patch Cacti:

wget http://www.cacti.net/downloads/patches/0.8.8b/security.patch
patch -p1 -N < security.patch

Step 4 – Cacti Database

Now that we have extracted the cacti files, we can move on preparing the database for the final installation step. Your first step should be securing the mysql database. The following command will help you with this task on a CentOS system. Make sure to select a strong password for root, e.g. Mpassword.

/usr/bin/mysql_secure_installation

Let’s create a new database and assign a special user to it:

mysqladmin -u root -p create cacti
mysql -p cacti < /var/www/html/cacti/cacti.sql
mysql -u root -p 

With the last command, you should be seing a mysql prompt where you can enter mysql commands. Here we are going to create the special cacti user. That user only needs to be able to connect from the local system and should have a strong password as well. Enter the following commands and make sure to replace the password:

GRANT ALL ON cacti.* TO cactiuser@localhost IDENTIFIED BY 'MyV3ryStr0ngPassword';
flush privileges;
exit

We now have the cacti files and the cacti database setup. The last step before moving to the web-based installer is setting the database credentials within the Cacti config file:

cd /var/www/html/cacti/include/
vi config.php

Change the $database_ lines to fit your new settings:

Change the $database_ lines to fit your new settings:
$database_type = "mysql";
$database_default = "cacti";
$database_hostname = "localhost";
$database_username = "cactiuser";
$database_password = "MyV3ryStr0ngPassword";
$database_port = "3306";
$database_ssl = false;

Depending on your installation, you should also uncomment the following line. In our example we have to make sure the following line is there:

$url_path = "/cacti/";

Step 6 – Running the Web-based installer

ata kukopi dari sini : cara install cacti