This example dashboard showcases what can be accomplished using the metrics that the drbd-reactor Prometheus plugin exports.
DRBD Grafana Dashboard
With its Prometheus plugin, drbd-reactor exports a powerful set of Prometheus metrics which can be used to optimally monitor a DRBD deployment.
You can find the source in the drbd-reactor project on GitHub.
Data source config
Upload an updated version of an exported dashboard.json file from Grafana