Why Your Docker Container Works Locally But Fails in Kubernetes

It's not Kubernetes being difficult. It's the assumptions your container was making that Docker quietly satisfied — and Kubernetes doesn't. You've been here before. The container runs perfectly on your laptop. docker run works. The app responds. Logs look clean. You push it to your managed Kubernetes cluster — EKS, GKE, AKS, take your pick — and something breaks. The pod crashes with no useful logs. Or it starts, passes health checks, and returns wrong responses. Or it worked fine in staging and