Install via plugin
These instructions assume that you already have Grafana installed on the target system. If you do not have an existing instance of Grafana, refer to Install on RPM-based Linux (CentOS, Fedora, OpenSuse, RedHat) or Install on Debian / Ubuntu.
Use the grafana-cli tool to install HELM from the command line:
grafana-cli plugins install opennms-helm-app
This installs the plugin into your grafana plugins directory. The default is /var/lib/grafana/plugins. More information on the cli tool.