There will be just one Hacktoberfest 2021 and it is coming soon! The OpenNMS community will participate and we are looking for contributors who want to join us in October. Hacktoberfest is an annual, month-long celebration of open source software driven by Digital Ocean. During this event everyone can support open source by contributing changes, [...]
Submitting issues, fixing bugs, contributing features, enhancements, and extensions, writing documentation, or reporting security issues are all valuable ways that our community helps make OpenNMS a better monitoring platform. OpenNMS uses Jira to manage issue tracking and development. Once you have a Jira account and have signed the OpenNMS Contribution Agreement (OCA), you can start [...]
We recently migrated our documentation to Antora. Learn more about how we did it: the good, the bad, and the technical.
If you use Provisiond to populate all or part of your node database, you may want to define how data is stored so that it remains in the same directory even if a nodeID changes. Mark Mahacek, Senior Application Support Engineer at The OpenNMS Group, shares how to do this in Storing data with foreign sources [...]
The OpenNMS Minion includes useful, built-in commands to verify configuration and debug access to management agents. In this Discourse article, Ronny Trommer, Community/Product Manager at The OpenNMS Group, shows how to test connectivity with the Minion, perform a health check, execute a remote ping to arbitrary FQDNs or IP addresses, execute remote DNS lookups, run SNMP [...]
If you look at the OpenNMS documentation, you’ll notice a change. Yes, it has a more polished appearance thanks to our new corporate branding, but it also has improved content and functionality as a result of our recent migration from AsciiDoctor to Antora for building the documentation. Migrating the documentation was a huge undertaking (we’ll [...]
OpenNMS is an “old school open source project” in many ways. We’ve been around for 20 years, spent most of that time hacking on code, and our community feels like family. Typical of early open source projects, marketing and branding haven’t always been a top priority at OpenNMS. We’ve always had a logo (a logotype, if [...]
Large, distributed networks can be difficult to reach and monitor from a central location, with challenges like firewalls, network address translation (NAT) traversal, overlapping IP address ranges, and locked-down environments. The OpenNMS Minion component extends the reach of Horizon/Meridian, so you can monitor systems and networks that would otherwise be inaccessible, for optimal visibility into every [...]
When you want to store large amounts of non-aggregated data (such as performance metrics), the round robin database (RRDtool) in OpenNMS may not be enough. OpenNMS provides a time-series data store (Newts) that works with Apache Cassandra or ScyllaDB to group metrics for more efficient storage and retrieval. It removes aggregation as a bottleneck to storage, [...]
OpenNMS Security Issue Requires Immediate Upgrade The OpenNMS Group recently learned about and fixed a security vulnerability that allowed local and remote code execution as an authenticated user via a custom, targeted JEXL expression. Thank you to Artem Smotrakov for notifying us of this issue. CVE-2021-3396 applies to the following: Meridian-2016.1.0 - Meridian-2016.1.24 Meridian-2017.1.0 - Meridian-2017.1.26 [...]
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