We build applications so that someone will use them. When your new application takes off you will find that operating a software system is a skill too. You will need a solid observability foundation to be able to quickly and confidently investigate and diagnose problems. Fortunately, we have mature telemetry and analysis technology for production diagnostics, and it is not difficult to add instrumentation to applications.

This presentation is a practical demonstration of how to instrument a typical, modern, distributed application and how to make sense of all that data.