How To Install Cacti Network Monitoring on CentOS 8

In this tutorial we will show you how to install Cacti Network Monitoring on CentOS 8. For those of you who didn’t know, Cacti is an open-source, web-based network monitoring and graphing tool designed as a front-end application for the open-source, industry-standard data logging tool RRDtool. It is used by IT businesses and stores all of the necessary information about bandwidth, hard disk usage, CPU usage, load average, RAM statistics etc in a MySQL database. Cacti creates graphs and populates them with data. It offers SNMP support, 3rd party templates and plugins and has built in user authentications and user permission features.

This article assumes you have at least basic knowledge of linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation Cacti on a CentOS 8 server.

Install Cacti Network Monitoring on CentOS 8

Step 1. First let’s start by ensuring your system is up-to-date.

sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
sudo dnf update

Step 2. Installing LAMP server.

A CentOS 8 LAMP server is required. If you do not have LAMP installed, you can follow our guide here.

Step 3. Installing required packages extensions.

Now, we’ll gonna install snmp and cacti on your CentOS system:

sudo dnf install net-snmp net-snmp-utils rrdtool

Step 4. Installing Cacti on CentOS 8.

Run following command to install Cacti:

dnf install cacti

Step 5. Configuring MariaDB for Cacti.

By default, MariaDB is not hardened. You can secure MariaDB using the mysql_secure_installation script. you should read and below each steps carefully which will set root password, remove anonymous users, disallow remote root login, and remove the test database and access to secure MariaDB:

mysql_secure_installation

Configure it like this:

- Set root password? [Y/n] y
- Remove anonymous users? [Y/n] y
- Disallow root login remotely? [Y/n] y
- Remove test database and access to it? [Y/n] y
- Reload privilege tables now? [Y/n] y

Next we will need to log in to the MariaDB console and create a database for the Cacti. Run the following command:

mysql -u root -p

This will prompt you for a password, so enter your MariaDB root password and hit Enter. Once you are logged in to your database server you need to create a database for Cacti installation:

MariaDB [(none)]> create database cacti;
MariaDB [(none)]> GRANT ALL ON cacti.* TO [email protected] IDENTIFIED BY 'cactipass';
MariaDB [(none)]> FLUSH privileges;
MariaDB [(none)]> quit;

Next, import cacti database tables from the cacti.sql file. First locate cacti.sql file:

mysql -u cacti -p cacti < /usr/share/doc/cacti-0.8.8b/cacti.sql

We’ll now configure our cacti configuration file:

nano /etc/cacti/db.php
$database_type = "mysql"; 
$database_default = "cacti"; 
$database_hostname = "localhost"; 
$database_username = "cacti"; 
$database_password = "cactipass";

Step 6. Configuring Apache Server for Cacti Installation.

Open file called /etc/httpd/conf.d/cacti.conf with nano editor:

nano /etc/httpd/conf.d/cacti.conf

Add the following lines:

Alias /cacti    /usr/share/cacti

<Directory /usr/share/cacti/>
        <IfModule mod_authz_core.c>
                # httpd 2.4
                Require all granted
        </IfModule>
        <IfModule !mod_authz_core.c>
                # httpd 2.2
                Order deny,allow
                Deny from all
                Allow from all
        </IfModule>
</Directory>

Save and close the file. Restart the Apache service for the changes to take effects:

systemctl restart httpd.service

Then, set cron for Cacti:

*/5 * * * * cacti /usr/bin/php /usr/share/cacti/poller.php > /dev/null 2>&1

Step 7. Configuring Firewall for Cacti.

Allow http and https ports on the firewall:

firewall-cmd --permanent --zone=public --add-service=http
firewall-cmd --reload

Step 8. Accessing cacti.

Cacti will be available on HTTP port 80 by default. Open your favorite browser and navigate to http://your_domain.com/cacti or http://server-ip/cacti and complete the required the steps to finish the installation. You will get the “Cacti Installation Guide” on screen. Click on ‘Next’ button.

Install Cacti Network Monitoring on CentOS 8

In next screen, you will get drop down button. Because this fresh installation select ‘New Install’ and click ‘Next’ button.

Install Cacti Network Monitoring on CentOS 8

Cacti will now check for the packages it needs to run properly. Make sure all the checks appear with an “OK” status, and then click Finish.

Install Cacti Network Monitoring on CentOS 8

The next page is the login page. The first time you log into Cacti, use admin as username and password.

Install Cacti Network Monitoring on CentOS 8

Congratulation’s! You have successfully installed Cacti. Thanks for using this tutorial for installing Cacti network monitoring on your CentOS 8 system. For additional help or useful information, we recommend you to check the official Cacti website.

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