Cloud-Native Microservices With Kubernetes - 2nd Edition

What Is Observability and Why Is It Important?

Observability, also known as o11y (11 letters between 'o' and 'y'), is a broad discipline that covers many aspects of system monitoring and analysis. It refers to the ability to look inside a system, understand its behavior, and make decisions based on that understanding.

In the software engineering world, the term originated in the 20th century but first appeared in IT around 2013, when X’s (formerly Twitter) engineering team used it in a blog post