This guide walks Kubernetes operators through a systematic, step‑by‑step process for diagnosing nodes stuck in the NotReady state, covering kubelet status reporting, common failure reasons, detailed command‑line checks, root‑cause analysis, remediation steps, verification, and long‑term preventive measures.
This comprehensive guide walks Kubernetes operators through a step‑by‑step process for diagnosing node health problems—such as NotReady, MemoryPressure, DiskPressure, PIDPressure, and NetworkUnavailable—by examining node conditions, reviewing events, checking system resources, inspecting component logs, applying targeted fixes, and verifying recovery, all illustrated with real‑world commands and examples.
This article walks through a real‑world Kubernetes incident where a node ran out of space due to Ceph storage inconsistencies and cgroup leaks, detailing step‑by‑step diagnostics, Ceph repair commands, pod eviction, node reboot, and post‑mortem recommendations for cluster operations.
