In this tutorial, we will show you how to install LibreNMS on CentOS 8. For those of you who didn’t know, LibreNMS is an open-source auto-discovering network monitoring tool for servers and network hardware. It supports a wide range of network hardware like Cisco, Juniper, Brocade, Foundry, HP, and operating systems including Linux and Windows. LibraNMS is a community-based fork of Network monitoring tool “Observium“, released under GPLv3.
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 of the LibreNMS network monitoring tool on CentOS 8.
Install LibreNMS on CentOS 8
Step 1. First, let’s start by ensuring your system is up-to-date and install all required dependency.
sudo dnf install epel-release sudo dnf update
Step 2. Installing the LEMP stack.
A CentOS LEMP server is required. If you do not have LEMP installed, you can follow our guide here.
Step 3. Installing LibreNMS on CentOS 8.
Now we clone LibreNMS software from GitHub like below:
cd /opt git clone https://github.com/librenms/librenms.git
We will need to change some folders permissions:
chown -R librenms:librenms /opt/librenms chmod 770 /opt/librenms setfacl -d -m g::rwx /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/ /opt/librenms/cache setfacl -R -m g::rwx /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/ /opt/librenms/cache
Step 4. Run Composer Wrapper.
Run the following commands to run the composer wrapper script:
cd /opt/librenms curl -sS https://getcomposer.org/installer | php su - librenms ./scripts/composer_wrapper.php install --no-dev
Step 5. Configuring MariaDB for LibreNMS.
By default, MariaDB is not hardened. You can secure MariaDB using the
mysql_secure_installation script. you should read and below each step carefully which will set a root password, remove anonymous users, disallow remote root login, and remove the test database and access to secure MariaDB:
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 LibreNMS. 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 LibreNMS installation:
MariaDB [(none)]> CREATE DATABASE librenms CHARACTER SET utf8 COLLATE utf8_unicode_ci; MariaDB [(none)]> CREATE USER 'librenms'@'localhost' IDENTIFIED BY 'YOUR-PASSWD'; MariaDB [(none)]> GRANT ALL PRIVILEGES ON librenms.* TO 'librenms'@'localhost'; MariaDB [(none)]> FLUSH PRIVILEGES; MariaDB [(none)]> exit
Once done, open the MariaDB configuration file and add the following lines under
Within the [mysqld] section please add:
Then, restart MariaDB for the changes to take effect:
sudo systemctl restart mariadb
Step 6. Configure PHP.
Now we edit
php.ini to your preferred time zone:
Add the following line:
date.timezone = Asia/Jakarta
Step 5. Configuring Nginx for LibreNMS.
Let’s create the VirtualHost definition for Nginx to be used by LibreNMS:
Add the following to the config file:
Now, we can restart the Nginx web server so that the changes take place:
sudo systemctl restart nginx
Step 6. Configure Firewall.
Allow Nginx through the firewall so that the user can able to access the LibreNMS portal from an external machine:
sudo firewall-cmd --zone public --add-service http sudo firewall-cmd --permanent --zone public --add-service http sudo firewall-cmd --reload
Step 7. Accessing LibreNMS Web Interface on the CentOS system.
LibreNMS will be available on HTTP port 80 by default. Open your favorite browser and navigate to
http://server-ip-address/install.php and complete the required steps to finish the installation.
Congratulations! You have successfully installed LibreNMS. Thanks for using this tutorial for installing the LibreNMS network monitoring tool on your CentOS 8 system. For additional help or useful information, we recommend you to check the official LibreNMS website.