How our status page gets its numbers

We wanted a status page that couldn't lie by omission — numbers that come from asking the real, running system, not something anyone has to remember to update by hand.

The number on our homepage and /status page comes from asking the login server directly, right now, how many of its connections actually belong to a signed-in account — not just how many sockets happen to be open, which would count someone sitting on the splash screen as a player. Same for every backend service: it's asked whether it's still registered on the message bus, and if it goes down, it just disappears from the page.