You can run it in your own environment. If you're running Kubernetes we provide an operator that orchestrates the test runs. If you are using docker we give you containers that you control with ENV VARs.
Do you have more background on the multi geo use case?
Yes I recently went through a similar use case with one of my alpha users. They wanted to run the reverse proxy and playback as docker containers spread through their environment. Will drop you an email with more info...
Do you have more background on the multi geo use case?