Install Observium on Debian/Ubuntu 🌱

What is Observium?

Observium is a low-maintenance auto-discovering network monitoring platform supporting a wide range of device types, platforms and operating systems...- https://www.observium.org/

Installing Observium

1. Log into the Linux device
2. Run the following commands in a terminal window
   # install prerequisites
   sudo apt install libapache2-mod-php7.3 php7.3-cli php7.3-mysql php7.3-gd php7.3-json php-pear snmp fping mariadb-server mariadb-client python-mysqldb rrdtool subversion whois mtr-tiny ipmitool graphviz imagemagick apache2 -y
   # create a directory for observium
   sudo mkdir -p /opt/observium
   # download latest observium release
   sudo wget http://www.observium.org/observium-community-latest.tar.gz
   sudo tar zxvf observium-community-latest.tar.gz --directory /opt
   # configure the MySQL database
   sudo su
   mysql_secure_installation
3. Press Enter to login as root
4. Type Y and press Enter to set a root password, type the password twice to confirm
5. Type Y and press Enter to remove anonymous users
6. Type Y and press Enter to disallow root login remotely
7. Type Y and press Enter to remove the test database
8. Type Y and press Enter to reload privilege tables
9. Run the following command to login into MySQL:
   mysql -u root -p
10. Authenticate with the root password set earlier
11. Run the following commands to create the Observium database and database user
    CREATE DATABASE observium DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
    GRANT ALL ON observium.* to 'observium_rw'@'localhost' IDENTIFIED BY '0b5erv1um!!';
    FLUSH PRIVILEGES;
    EXIT;
    exit
12. Continue with the following commands
    sudo cp /opt/observium/config.php.default /opt/observium/config.php
    sudo nano /opt/observium/config.php
13. Update the MySQL connection information
14. Press CTRL+O, Enter, CTRL+X to write the changes to config.php
15. Continue with the following commands
    # create the database objects
    /opt/observium/discovery.php -u
    # create the logs directory
    sudo mkdir -p /opt/observium/logs
    # create RRDs directory
    sudo mkdir /opt/observium/rrd
    sudo chown www-data:www-data /opt/observium/rrd
    # create observium apache2 configuration
    sudo nano /etc/apache2/sites-available/observium.conf
16. Paste the following configuration

    Listen 8001
    
    <VirtualHost *:8001>
    DocumentRoot /opt/observium/html
    <Directory />
    AllowOverride All
    Options FollowSymLinks MultiViews
    Require all granted
    </Directory>
    </VirtualHost>

17. Press CTRL+O, Enter, CTRL+X to write the changes to observium.conf
18. Continue with the following commands
    # enable required apache modules
    sudo a2enmod rewrite
    # enable the observium site
    sudo a2ensite observium
    # restart apache2 service
    sudo systemctl restart apache2
    # create an admin user account
    /opt/observium/adduser.php i12bretro supersecurepw 10
19. Open a web browser and navigate to http://DNSorIP:8001
20. Log into Observium with the user created above
21. Welcome to Observium

Source: https://docs.observium.org/install_debian/