etcd Deep Dive: The Heart of Your Kubernetes Cluster
When something goes wrong in Kubernetes, it’s often etcd. API server timing out? Check etcd. Pods stuck in pending? Might be etcd. Cluster feels slow? Probably etcd. Yet most Kubernetes operators treat etcd as a black box. It’s just “the database” that runs alongside the control plane. But understanding etcd makes you dramatically better at operating Kubernetes. Let me take you inside. What is etcd? etcd is a distributed key-value store. Think of it as a highly reliable dictionary that multiple servers agree on. Kubernetes uses it to store all cluster state: every pod, deployment, secret, configmap, and custom resource lives in etcd. ...