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Handbook

Kubernetes Debugging Handbook

The Kubernetes docs explain what commands do. This handbook explains what to do when a command doesn't work.

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What's covered
  • Pod lifecycle failures — Pending, ImagePullBackOff, CrashLoopBackOff, OOMKilled, Evicted, Init:CrashLoopBackOff and the 20+ variations that mean subtly different things
  • Networking — Service returning no endpoints, DNS resolution failing inside pods, NetworkPolicy blocking traffic silently, LoadBalancer stuck pending
  • Storage — PVC stuck pending, PV bound to the wrong PVC, StatefulSet volumes not detaching
  • Cluster-level — nodes NotReady, control-plane API timeouts, kubelet certificates expired, etcd out of space
  • RBAC + auth — the forbidden: User cannot list resource puzzle, service-account token failures, kubectl exec refused
  • Application errors — health checks flapping, liveness killing during startup, HPA not scaling, PDB blocking node drain
Format of every entry

Every pattern follows the same 4-step structure so you can find and fix fast during an outage:

  • Symptom — exactly what kubectl shows
  • Cause — what's actually happening under the hood
  • Diagnose — the specific commands to run
  • Fix — the config change or command that resolves it

Every section ends with a prevention checklist — the two or three things to set at deploy time so this class of failure never bites again.

Format + delivery
  • Format: Single PDF, ~100 pages, indexed and searchable
  • Delivery: PDF emailed as attachment within seconds of successful payment
  • License: Single-reader. Read it, apply the patterns in your work. Do not share, upload, or resell the PDF. Team licenses on request.
  • Updates: Free re-downloads for a year
  • Support: hello@aiunplugged.in — response within 24 hours
FAQ
What Kubernetes version does this target?
Kubernetes 1.28+. Most patterns apply to older versions too since the failure modes are structural, not version-specific.
Is this for beginners or advanced engineers?
Intermediate. Assumes you know kubectl apply and roughly what a Pod, Service, and Deployment are. If you've hit at least one CrashLoopBackOff in production, this book is for you.
Does it cover EKS / GKE / AKS specifics?
The debugging patterns are cluster-flavor-agnostic. Cloud-specific bits (IRSA, GKE workload identity, node-pool sizing) are called out where they change the fix.
Can my team buy it once and share?
Single-reader license means the PDF is for the buyer's personal reading only — please don't forward or upload it. For teams, mail hello@aiunplugged.in — per-seat pricing available, cheaper than most course subscriptions.
Refund policy?
7-day refund if the book doesn't help. Just reply to the delivery email.

Stop Stack Overflow-ing at 2 AM.

Every pattern indexed, every fix tested, one PDF away.

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