mkdir /opt/observium/logs,rrd chown -R apache:apache /opt/observium/logs,rrd Copy the default configuration:
nano /opt/observium/config.php Set the database credentials:
date.timezone = "America/New_York" Then systemctl restart httpd chmod 4750 /usr/sbin/fping Conclusion You now have a fully functional Observium installation on CentOS 8. Start adding routers, switches, firewalls, and servers to monitor their health, bandwidth, and errors via SNMP.
mysql -u root -p Run these SQL commands (replace 'your_strong_password' ): how to install observium on centos 8
<VirtualHost *:80> ServerName observium.yourdomain.com DocumentRoot /opt/observium/html <Directory /opt/observium/html> Options FollowSymLinks AllowOverride All Require all granted </Directory> ErrorLog /var/log/httpd/observium_error.log CustomLog /var/log/httpd/observium_access.log combined </VirtualHost> Test config and restart Apache:
cd /opt svn update --set-depth empty https://svn.observium.org/svn/observium/trunk observium If svn is missing: dnf install -y subversion Set permissions:
nano /etc/httpd/conf.d/observium.conf Add: For more, consider Observium Professional
The Community Edition is limited to 100 devices. For more, consider Observium Professional. Also, plan to migrate to AlmaLinux 8 or Rocky Linux 8 before CentOS 8 becomes unsupported for security updates.
sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-* sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-* Update the system:
cd /opt/observium ./discovery.php -h your_device_hostname | Task | Command/Path | |------|---------------| | Update Observium | svn update /opt/observium | | Reset admin password | ./user.php mod pass admin newpassword | | Check poller status | ./poller.php -d localhost | | RRD storage path | /opt/observium/rrd | Troubleshooting Common Issues 1. SELinux blocking RRD writes setsebool -P httpd_can_network_connect on chcon -R -t httpd_sys_rw_content_t /opt/observium/rrd 2. PHP timezone warnings Edit /etc/php.ini : consider Observium Professional. Also
systemctl enable --now httpd mariadb Run the secure installation and set a root password:
httpd -t systemctl restart httpd Add the Observium polling cron job: