As I have posted them before, I’ll also post them here and hope they are useful for someone when figuring out a problem or explaining how Icinga 2 communicates on the inside.
Icinga 2 + Icinga Web 2 + Icinga Director + Graphite
Icinga 2 + Icinga Web 2 + Icinga Director + PNP4Nagios
Hope both are correct. If not, please tell me and I will correct the error(s)