In T251609 we are going to automate sending canary events into event streams. This will let us differentiate between cases where there are just no events in a stream, vs when the pipeline is broken. It will also help us understand when all events for an hour have been imported.
We are only planning to do this for analytics events for now, but would also like to eventually do so with production ones...although we're not quite sure how yet.
In order to do this, we need to be able to POST the canary events into all the EventGate instances. We'll likely run the job that posts the events in the Analytics VLAN, so we need to be able to access them.
We've done this for eventgate-analytics in T228882, we just need to expand to all the other EventGates.