Troubleshooting Guide AKS Kubernetes Real Solutions kubectl Azure Kubernetes Service (AKS) Troubleshooting Guide: Real Solutions to Common Problems CrashLoopBackOff at 2am. Pods stuck Pending with no obvious cause. Nodes going NotReady mid-deployment. DNS resolution silently failing in production. Every AKS engineer encounters these — the difference between engineers who panic and engineers who stay calm is knowing the exact sequence of diagnostic commands to run. This guide gives you that sequence, the root cause analysis for each failure mode, and the fix. 3 commands 90% of AKS problems are diagnosed with the same three kubectl commands: describe pod, logs --previous, and get events — in that order, every time Exit 137 The exit code that tells you everything: container killed by SIGKILL — either the Linux OOM killer (memory limit exceeded) or kubelet after grace period expired 5 min The CrashLoopBackOff ceiling: Kubernetes applies exponential backoff (10s → 20s → 40s → 80s → 160s → 3...
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