Kubernetes High Availability: Stacked vs External etcd Explained
When I first set up a “production” Kubernetes cluster, I had one control plane node. It worked fine until it didn’t — a failed disk took down the entire cluster. Every pod, every service, everything. That day taught me what “single point of failure” really means. Kubernetes High Availability isn’t optional for production. But there’s a choice that trips up many people: do you run etcd on your control plane nodes (stacked), or on separate dedicated nodes (external)? Let me break down both approaches. ...