API Server

kube-apiserver Not Starting: Troubleshooting Guide The kube-apiserver is the heart of any Kubernetes cluster. If it doesn’t start, the entire control plane is effectively down — meaning kubectl and controllers won’t work. Let’s go through common causes and fixes. Symptoms kubectl commands fail with connection errors. In kubectl get pods -n kube-system, the kube-apiserver pod is CrashLoopBackOff or not running. Logs may contain messages like etcd connection refused, failed to listen on port 6443, or certificate errors. Common Causes and Fixes 1. Port Conflicts The API server binds to 6443 by default. If another process is already listening there, kube-apiserver won’t start. ...

Introduction Kubernetes is powerful, but what’s the brain behind all those kubectl commands? That role is played by the kube-apiserver — the front door to your Kubernetes cluster. Everything goes through it: creating pods, scaling deployments, checking health — you name it. Let’s break it down in a way that’s easy to understand. What is kube-apiserver? kube-apiserver is the central communication hub of Kubernetes. It exposes the Kubernetes API and handles: ...