Definition from Cacti official site:
Cacti is a complete frontend to RRDTool, it stores all of the necessary information to create graphs and populate them with data in a MySQL database. The frontend is completely PHP driven. Along with being able to maintain Graphs, Data Sources, and Round Robin Archives in a database, cacti handles the data gathering. There is also SNMP support for those used to creating traffic graphs with MRTG.
Advertisement
Step 1: Set Up Apache, MySQL and PHP
In order to install cacti you required a webserver, database and PHP to work. If you have already installed it skip this step else follow below commands.
# yum install httpd httpd-devel # yum install mysql mysql-server # yum install php php-pear php-common php-gd php-devel php-mbstring php-cli php-mysql
Step 2: Install other Required Packages
Cacti required RRDTool to retrieve manage data ,PHP SNMP module to access data and net-snmp. Use following commands to install it.
# yum install rrdtool php-snmp net-snmp-utils p net-snmp-libs php-pear-Net-SMTP
Step 3: Start Services
Start all the required services to work with them using following commands.
# service httpd start # service mysqld start # service snmpd start
Configure all services to auto start on system boot.
# chkconfig --levels 345 httpd on # chkconfig --levels 345 mysqld on # chkconfig --levels 345 snmpd on
Step 4: Install Cacti on RHEL/CentOS Systems
Install cacti on your system using yum package manager.
# yum install cacti
Step 5: Setup MySQL database and User Accounts
Setup MySQL database and user account for cacti installation and assign priviledges to user on database.
# mysql -u root -p mysql> create database cacti; mysql> GRANT ALL on cacti.* to [email protected]'localhost' IDENTIFIED BY 'SecretPassword'; mysql> FLUSH PRIVILEGES; mysql> quit;
Step 6: Restore Cacti Database
Use below command to restore default cacti database
# mysql -u cactiusr -p cacti < /usr/share/doc/cacti-0.8.8a/cacti.sql
It may change location of cacti.sql file as per version installed of cacti. Use below command to locate file.
# rpm -ql cacti | grep cacti.sql /usr/share/doc/cacti-0.8.8a/cacti.sql
Step 7: Edit Database Configuration File
Make below changes in cacti database configuration file to connect application with database.
# vi /etc/cacti/db.php
$database_type = "mysql"; $database_default = "cacti"; $database_hostname = "localhost"; $database_username = "cactiusr"; $database_password = "SecretPassword"; $database_port = "3306"; $database_ssl = false;
Step 8: Configure Aapche to Network Accessible
Edit cacti apache configuration file to make is accessible over network.
# vim /etc/httpd/conf.d/cacti.conf
Alias /cacti /usr/share/cacti <Directory /usr/share/cacti/> <IfModule mod_authz_core.c> # httpd 2.4 Require host 192.168.1.0/32 </IfModule> <IfModule !mod_authz_core.c> # httpd 2.2 Order deny,allow Deny from all Allow from 192.168.1.0/32 </IfModule> </Directory>
Step 9: Enable Cacti Cron
Edit
# vi /etc/cron.d/cacti */5 * * * * cacti /usr/bin/php /usr/share/cacti/poller.php > /dev/null 2>&1
Step 10: Start Cacti Web Installer.
Access Cacti url in your brower, First time it will redirect to web installer. Follow the steps as per below screenshots.
URL: http://192.168.1.190/cacti/
After Finish the setup, it will redirect to loign scren, use below given username and password to login. At first login it will force to change password.
Username: admin Password: admin
Thanks for reading this article. If you get this article helpful, please don't forgot to share it.