"you've worked with nagios before haven't you? Can you give a presentation on it" 'sure' in the meeting: so tell us about opennms

Is there anyone out there who knows opennms? I got assigned to "improve" the nms diagnostics page (graphs are drawn and shit) but I can't find any dissent documentation. My task has even been changed to "if you solve the problem, write down a documentation on how you did it"
So yeah... Feeling lost.. Not even a SO thread to help me 😳😖

What do you use for performance monitoring on your infrastructure?

My company uses zabbix, OpenNMS and Nagios to monitor different parts of our infrastructure (from shared web hosting to OCCAS to IPTV to FutureVoice to Atlassian servers) but has no real-time performance checks.

I’ve set netdata master with prometheus backlog and grafana dashboards to monitor different metrics, however I am not sure whether any better approach could be done. Any suggestions?