We want to upgrade our production servers to the latest release, but
need to know how to wait for an instance to be actually ready.
Specifically, when we start the EventStore service that returns
immediately, but it seems like we then really should wait for
"ReadIndex building..." to be completed before upgrading the next
Is there a way to know when an EventStore is really really ready for
use? Are the ports only available once it is really ready for example?