I am working with diagram plugin and have a pretty much similar setup below.
I cannot find how to link the metric value to each node. (cannot find in the documentation)
I am using an influxdb as the data source. and using the latest packages of Grafana, InfluxDB, and diagram plugin
Here is the sample query data populated in influxdb -
insert application_status,application=application1 value=1 <== value=0 is is OK (color - Green) and value=1 should be DOWN (Color - Red)
Need to change the color in Application 1 accordingly.