Grafana lets you unify monitoring data from multiple Enterprise Manager sites.

To visualize data across multiple sites:

1. Query data for one Enterprise Manager site and save that visualization.
2. Duplicate that panel, edit its data source to point to a new Enterprise Manager site.
3. Rename it and publish it to the same dashboard.

For example, you can visualize availability data from two separate Enterprise Manager sites in different regions, as shown below.

To create a custom federated dashboard, you can use the pre-defined Multi-EM template.

When using the Multi-EM template, you'll need to do the following:

1. In the General tab, select the Repeat option. This helps when the top-level site selection has multiple sites checked.
2. Select only one Enterprise Manager site from the top-level selection.
3. Set up a non-time series based query against a single repository within an Enterprise Manager instance.
4. Replicate the same setup/query across other instances of Enterprise Manager that are enabled as Data Sources by selecting other Enterprise Manager instances from the drop-down.