What’s New in OpenNMS Meridian 2024

To overcome common upgrading problems, the data directory is automatically pruned when invoking the install.sh script. Furthermore, all Karaf-related configuration files are restored to their pristine state.

The OpenNMS Plugin API has been updated to version 1.6.0, which includes some new APIs ported over from the Horizon codebase to simplify plugin development, as well as cleanups to dependencies. It also includes some fixes to the protocol list used by Enlinkd.

Key-value pair based meta data can now be added to almost every entity within OpenNMS. You can now annotate with metadata threshold fields, poller parameters, and integrations (WSMAN, JCIFS, IFTTT, VMware).

Meridian can now be deployed on containerized environments. This will result in easier updates and upgrades.

An enhanced node list has been introduced with options for sorting and filtering.

The OpenNMS Minion Docker container no longer uses the KAFKA_SINK, KAFKA_RPC and KAFKA_TWIN prefixes to configure Kafka. Instead, only the KAFKA_IPC prefix is used, which ensures that all Kafka-related settings are set correctly for all features and that ActiveMQ is no longer installed incorrectly.

The Passive Status Monitor previously used the time of the event’s arrival as the timestamp of the status. As this is too imprecise for some use cases, the time field of the event is now also evaluated. If the field is set, it is adopted unchanged as the timestamp of the status. If no time is set, the timestamp is generated as before when the event arrives.

The SNMP Metadata Provisioning Adapter is not enabled by default anymore. Set enabled="true" in the configuration file $OPENNMS_HOME/etc/snmp-metadata-adapter-configuration.xml to enable it.

The Docker images for the core, minion, and sentinel have been changed from being Ubuntu-based to using RedHat’s Universal Base Image. This move shrinks the image a bit, makes minimal updating easier, and should simplify running in restrictive OpenShift environments.

The images are based on the ubi9-minimal image, which is essentially a stripped down version of RHEL 9. This means that things will have moved around a bit in the filesystem, and that you should use microdnf for package management.

Some characters (/, \, ?, &, *, ', “) may not be used in requisition names. The UI components have already enforced the validation of requisition names. This restriction is now also enforced when creating search requests via the OpenNMS ReST API.