RT provides a diagnostics API which you can run to return information about the state and health of the RT cluster.
This diagnostics report is intended to be viewed by a Support team to troubleshoot problems that arise when access to the RT cluster is not available.
To return the diagnostics you must call an API on the RT supervisor process running in you kubernetes cluster.
You should perform this call on each of the nodes in the RT cluster as each node will return it's own set of diagnostics.
Details on this API are available here.