What is CrashLoopBackOff? CrashLoopBackOff means your container is starting, crashing, and Kubernetes keeps restarting it in a loop. It is not a single error — it is a symptom of something else failing inside your container. Common Causes 1. Application error on startup Your app crashes immediately after starting due to a bug or missing dependency. 2. Wrong environment variables Missing or incorrect env vars cause the app to fail before it runs. ...