Demystifying Kubernetes Metrics
Intro When setting up Prometheus observability for Kubernetes, I kept running into the same question again and again: What metrics are actually available and where do they come from? This post is my attempt to document all default and optional metric sources in a Kubernetes cluster, grouped by system layer. Additionally, I want to provide a brief overview of each metric type that an endpoint exposes. Core Components Recap Before diving into metrics, here’s a quick reminder of some key Kubernetes components that either generate or expose metrics: ...