During this talk, we will discuss principles of observability in modern systems. In other words, we will touch on topics ranging from gathering and handling telemetry (metrics, logs, traces, and more) to using this data to answer questions about our system. One could think of this talk as living through a story. I will talk about our journey of making YSoft AIVA observable. What we have done so far, challenges and problems we have solved and what we have learned along the way.