Stack Utilisation Graphs with Munin
Graphs are plotted for all major system information and also for each application running on each node. You can see an overview of Nginx connections, RAM usage and much more through the Munin graphs.
The graphs are rendered and accessible via the monitoring server.
You can access it via the following URL:
! You must be connected to the VPN to use this service
Please note that Munin uses HTTP rather than HTTPS - this helps avoid the requirement of certificate management on the stack, though traffic to it is still secure since it can only be accessed through the VPN.