Service discovery.
Nobody memorises the taco truck’s corner — you check where it parked this morning.
- It says here… 10.0.0.7.1
The config file was right the day somebody wrote it; the platform has replaced that machine twice since.
- Payments, just landed at 10.0.4.2.2
Registering is the instance’s own first act — no human updates a spreadsheet on its behalf.
- 3
Dee keeps taking pulses, so an entry that stops answering leaves the book before it can be handed out.
- Payments, please.4
Callers hold names, not numbers — a deploy or a reschedule never invalidates what the caller knows.
- Alive as of two seconds ago.5
The answer is closer to “they picked up the phone just now” than to a line in a printed phone book.
- 6
The book rewrites itself all day as instances come and go; truth lives in one place instead of a hundred config files.
Semicolony semicolony.dev/eli5/service-discovery/comic