A system ran for a thousand days without error.
On the thousand-and-first day, it failed.
The developer asked, "When did this begin?"
But the system had never learned to speak.
Twenty interactive exercises. No backend. No prior knowledge required.
Each koan presents a problem. You investigate, discover, and name the concept yourself — metrics, traces, logs, spans, collectors, pipelines, sampling, correlation — one idea at a time, in order.
Built for product managers and anyone who works near distributed systems but hasn't yet listened to them.
Desktop only. Headphones recommended.
Translations — The site supports multiple languages. Want to help translate? See CONTRIBUTING-TRANSLATIONS.md.
Inspired by Ruby Koans by Jim Weirich and Joe O'Brien.
Music: All the Light by Future Zen (CC-BY-SA 4.0)