pnp4nagios replacement

Hi,

Now that PHP7 is gone and pnp4nagios is dead since 2017, what are you 
using for monitoring? Our Nagios/PNP setup worked well for many ears but 
now it is time to replace pnp4nagios.

Looked at Grafana but that looks like an overkill for our purposes, 
especially since Nagios is still ok and the necessary data is already 
there, we just want to display it with graphs.

Pointers appriciated!

Thanks,
Per