DNS Works on My Laptop: CoreDNS Failures in Kubernetes
In-cluster DNS failing while your laptop resolves fine? Debug ndots:5 query amplification, the UDP conntrack race, CoreDNS health, and scaling, step by step.
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ImagePullBackOff: Every Cause I’ve Actually Hit
ImagePullBackOff has four real causes: bad tags, registry auth, rate limits, and network. Learn to read the pull error and fix the right one.
Read the postNode NotReady at 2AM: A Recovery Walkthrough
A node went NotReady at 2AM. Triage kubelet, disk pressure, and network partitions, then decide when to cordon, drain, or wait.
Read the postAKS in Production: CNI Overlay, Workload Identity, Hidden Limits
CNI Overlay vs kubenet, Workload Identity, the invisible control plane, surge math, and the AKS quotas that only appear under load — from production.
Read the postArgoCD ApplicationSets: Stop Copy-Pasting Your Environments
Hand-maintaining near-identical ArgoCD Application manifests per cluster is a slow-motion incident. Here's how ApplicationSet generators fix it, and where they bite back.
Read the postArgoCD Sharding, Reconciliation Tuning, and the 1,000-App Wall
What actually breaks when ArgoCD grows past hundreds of Applications: controller sharding, reconciliation tuning, repo-server memory, and the metrics to watch.
Read the postArgoCD Sync Waves: Ordering Your Deploys Without Losing Your Mind
A practical guide to ArgoCD sync waves: why resource ordering matters, how the sync-wave annotation really works, and the mistakes that bite everyone.
Read the postCrashLoopBackOff: A Field Guide From Someone Who’s Been There
CrashLoopBackOff isn't one error, it's five. A practical debugging guide to restart counts, last state, logs --previous, and the causes I actually see in production.
Read the postEKS vs AKS vs GKE at Scale: The Differences That Show Up in Production
An opinionated EKS vs AKS vs GKE comparison for teams running 10+ production clusters: pricing, forced upgrades, quota friction, and multi-cluster tooling.
Read the postEKS Networking: VPC CNI, Prefix Delegation, and the IP Math
ENI slot math, /28 prefix delegation, warm pool tuning, and the failure modes that page you at 2 AM — an operator's guide to EKS pod networking.
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