Etcd: A Key-Value Store That Stores All Cluster Data

If you’ve ever wondered where Kubernetes stores all its internal state—everything from Pod definitions to ConfigMaps, from cluster events to RBAC rules—the answer is etcd.

Etcd is a distributed, consistent, and highly-available key-value store used as Kubernetes’ source of truth. Without etcd, Kubernetes wouldn’t remember anything—it’s where all the clus…