Graceful Shutdown in Kubernetes: SIGTERM, Drain, and Deadlines
Implement graceful shutdown with readiness removal, SIGTERM handling, request and queue drain, resource cleanup, and Kubernetes termination deadlines.
Kubernetes CrashLoopBackOff: Causes and How to Fix It
What CrashLoopBackOff means, the common reasons a pod keeps restarting, and a step-by-step way to diagnose and fix the crash loop with kubectl.
Kubernetes ImagePullBackOff and ErrImagePull: How to Fix
What ImagePullBackOff and ErrImagePull mean, why Kubernetes can't pull your container image, and how to diagnose and fix the most common causes.
Kubernetes OOMKilled (Exit Code 137): Causes and Fixes
Why Kubernetes kills pods with OOMKilled and exit code 137, how memory requests and limits cause it, and how to diagnose and fix out-of-memory restarts.
Health Check Endpoint Design: /healthz vs /livez vs /readyz
Design reliable /healthz, /livez, and /readyz endpoints. Learn liveness vs readiness, Kubernetes probes, dependency checks, and alerting.
Kubernetes Monitoring: Health Checks, Pod Uptime, and Alerting
Kubernetes clusters fail in ways that traditional monitoring misses. Learn how to monitor pod health, service endpoints, and set up alerts for K8s downtime.