(EN) OpenNMS at 20 – Almost as Old as Nagios

The very first public OpenNMS code was posted on Sourceforge in March of 2000 (by comparison, NetSaint, the precursor to Nagios, posted its first code in January of 2000). OpenNMS turned 20 years old last year, but due to the spread of COVID-19 we did not do much to celebrate. But 2021 is a new year, and this talk will cover the history of the OpenNMS open source project over the last 20 years. It is an interesting story, starting with the company that began the project and why they decided to abandon it. How it was picked up by an individual who managed to grow the community until they could form a new company to support it. What happens when another company steals your software project and tries to make a commercial product and how do you handle growth and then an acquisition. The talk will also cover how OpenNMS has grown from a monitoring solution based mainly on synthetic transactions to an observability platform used by some of the world’s largest companies, and where it plans to go next. If you are wondering how to build a business around an open source project, this talk will not have all the answers, but perhaps by going over the history of OpenNMS it will provide some clues.


  • Tarus Balog
    Tarus Balog
    The OpenNMS Group

    Tarus Balog has been involved in managing communications networks professionally since 1988, and unprofessionally since 1978 when he got his first computer – a TRS-80 from Radio Shack. Having worked as a network management consultant for many years, he was constantly frustrated in the lack of flexibility involved in commercial solutions as well as shocked by their high prices. Looking for a better solution, he turned to open source and joined the OpenNMS project in 2001 and become the principal administrator of the project in 2002. Since then, he has managed not only to make a living working with free software, but the OpenNMS Group, the services company behind the project, has thrived. He is an outspoken evangelist for open source software and the communities it inspires.


Nov 09 - 10 2021