Diamond is deprecated in favour of prometheus. I checked existing dashboards and there's a number of using metrics which should also be provided by prometheus-node-exporter:
(some of them may also be deprecated, not sure)
https://grafana.wikimedia.org/dashboard/db/cloudvps-eqiad1
(network and load stats, those should all be covered by prometheus-node-exporter)
https://grafana.wikimedia.org/dashboard/db/labs-monitoring
The stats for labmon reference Diamond metrics, but the labvirt usage stats are
broken and labstore1001 is no longer an NFS server
https://grafana.wikimedia.org/dashboard/db/cloud-capacity-planning
(CPU, memory, load, disk stats)
https://grafana.wikimedia.org/dashboard/db/labs-capacity-planning
(CPU, memory, load, disk stats)
https://grafana.wikimedia.org/dashboard/db/labstore1004-1005
(load, IO, network stats)
https://grafana.wikimedia.org/dashboard/db/labvirt-node-disk-stats
(IO stats)