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Installing OpenNMS

Current Releases


Get Started With OpenNMS

  • Non-English Resources for New Users

Database installation

Frequently Asked Questions

If you have questions after reading the how-to guides, some of them might be answered by reading the FAQs.

Configuring OpenNMS

Basic Information



Provisioning Nodes and Services

Polling / Monitoring

The OpenNMS pollerd subsystem is responsible for polling its defined list of services each monitoring interval (by default, every 5 minutes). If any service is down, pollerd will send an event notification to other OpenNMS subsystems to handle as desired (such as the notification system, which could then send an e-mail alert).

Pollerd's main configuration file is /etc/poller-configuration.xml.

Note that pollerd requires its monitored services to already have been initially provisioned in order to start monitoring them. Provisiond handles this service provisioning using either requisitions or detectors.

General Polling Documentation

Monitoring specific hardware components

Here are articles on how to monitor specific hardware devices.

See also


For APC UPS devices directly connected to a PC using a USB or serial cable, these need to be monitored through PowerChute running on a connected PC.

For APC UPS units with built-in network cards (shipped with APC PowerChute Network Shutdown), these can be monitored directly by OpenNMS as native SNMP-capable network devices.

CPU utilization

Disk storage space usage

Memory utilization and disk paging/swap usage

Network utilization

Snom phones

Monitoring specific software components

Here are articles on how to monitor specific software services.

See also






SSL certificates




  • see the separate WMI section on this page

Events and Alarms

Other sources of events besides SNMP traps



3rd party devices

Data Collection

SNMP Data Collection

SNMP Data collection is available in all versions of OpenNMS, but only 1.3.2 and above have the ability to collect data on arbitrary indexes.

HTTP Data Collection

HTTP data collection is available in OpenNMS 1.3.2.

WMI Data collection

WMI (Windows Management Instrumentation) is the native Windows management and data collection API.

JMX Data Collection

JMX data collection is available in OpenNMS 1.3.x.

JDBC Data Collection

JDBC Data Collection is a feature that has to be compiled separately as of 1.8.3.

Nagios / NSClient / NSClient++ Data Collection

XML Data Collection

XML Data Collection is a feature that was added in 1.10.

VMware Monitoring

View / Export / Debug / Convert collected data



Jrobin graphs

Most data collected and written to JRB (previously RRD) files can be used to create jrobin graphs.

Jasper reports

You can generate paper-like reports by using the OpenNMS/JasperReports integration. These reports can then be sent by email or generated on-demand using the web interface.


Asset Tracking System

Maps in OpenNMS

Access Restrictions / ACLs

Customize OpenNMS

Customize the OpenNMS GUI

Category Grooming Script for mass updates to OpenNMS categories

Integrate OpenNMS with Other Systems

Trouble Ticket Integration

Maintain Your OpenNMS Installation


  • Performance tuning: Please take a look at the Performance Tuning Guide to avoid basic performance pitfalls in the way your system is set up.


Database backup and restore

osolete see: [[1]])

Hacks and other improvements

Upgrading and Configuration Management

Additional Information

Category tree index test

Useful things to read

SNMP-related Stuff

Success Stories

The OpenNMS Book

The rumours about a book written in German are true. As of 04 June 2010, OpenNMS: Netzwerkmanagement mit freier Software is available for purchase from Amazon.DE.

There is mounting interest in an English-language book. As of June 2010, there is an effort underway to organize this effort.

eBook: Instant OpenNMS Starter A review:

Ebook Instant OpenNMS Starter.jpg

Special needs, new technology

Google Summer of Code 2013

OpenNMS is supported by Google Summer of Code.

OpenNMS Chrome Extension

The official link is:

OpenNMS Extension 01.jpg

OpenNMS Forge

Requisition to notification strategy