This article is outdated and may not work correctly for current operating systems or software.
OpenNMS is an enterprise-grade open source network management platform that can be used to monitor and manage numerous devices from a single instance. With all kinds of metrics collected by OpenNMS, system administrators can easily discover service outages and latency and then make informed decisions accordingly.
A newly deployed Vultr Ubuntu 16.04 LTS x64 server instance with at least 2GB of memory. Say its IP address is 203.0.113.1.
Ability to log in as root.
The server instance has been updated to the latest stable status using the EPEL YUM repo.
If you are using a low-end machine with lesser memory, you need to setup a swap file before you can properly run OpenNMS on it.
Log in as root, and execute the following.
dd if=/dev/zero of=/swapfile count=2048 bs=1M
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
echo '/swapfile none swap sw 0 0' >> /etc/fstab
Traditionally, installing OpenNMS is a relatively complicated job because it involves multiple technologies, including Oracle Java 8 JDK, PostgreSQL, OpenNMS, systemd, etc. Thankfully, OpenNMS provides an official quickstart install script for Ubuntu 16.04, which can greatly simplify the procedures.
Warning: This script is for a fresh installation of OpenNMS only. If you have installed an earlier version of OpenNMS on the system, running this script might cause unintended consequences.
cd
curl -L https://github.com/opennms-forge/opennms-install/archive/1.1.tar.gz | tar xz
cd opennms-install-1.1
bash bootstrap-debian.sh
The script will automatically install all required components for running OpenNMS. During the process, you only need to confirm the installation and provide database credentials as follows.
If you want to proceed, type YES: YES
Enter database username: opennmsuser
Enter database password: yourpassword
Remember to replace the username and password above with your own.
Next, when you are brought into the Configuring opennms-db interface, press Enter to manually run the OpenNMS installer as required.
When you are brought into the Configuring oracle-java8-installer interface, press Enter to confirm your awareness about the Oracle Binary Code License Agreement for the Java SE Platform Products and JavaFX.
When you see the question Do you accept the Oracle Binary Code license terms?, use the Left Arrow key to choose <Yes> and then press Enter.
If all went well, you will see the congratulations message.
Congratulations
---------------
OpenNMS is up and running. You can access the web application with
http://this-systems-ip:8980
...
Before you access OpenNMS using a web browser, you should modify firewall rules to allow inbound traffic on port 8980.
ufw allow OpenSSH
ufw allow 8980
ufw enable
Finally, point your favorite web browser to http://203.0.113.1:8980, and log in with the default username admin and the default password admin.
For security purposes, you should change the password immediately. Hover over the main navigation Admin and then click the Change Password link.