Most of them are outdated, but provide historical design context.
They are not user documentation and should not be treated as such.
Documentation is available here.
oVirt Grafana Integration
Summary
Starting with this release, the Grafana dashboard for the Data Warehouse is installed by default, to enable easy monitoring of Red Hat Virtualization metrics.
Grafana includes pre-built dashboards for datacenter, cluster, host, and VM data, Executive overview, Trend analysis and detailed view for per-object statistics.
NOTE: The Data Warehouse is installed by default at Basic scale resource use.
To obtain the full benefits of Grafana, it is recommended to update the Data Warehouse scale to Full.
Full scaling may require migrating the Data Warehouse to a separate virtual machine.
For Data Warehouse scaling instructions, see Changing the Data Warehouse Sampling Scale
For instructions on migrating to or installing on a separate machine, see Migrating Data Warehouse to a Separate Machine