Feb 24
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Is your Kubernetes pod stuck in a CrashLoopBackOff cycle? Don’t let it bring down your service. In this practical tutorial, we’ll walk through the exact diagnostic steps used by SREs to find the root cause—from log inspection to resource limits—and fix it permanently. What you will learn: Identify: Quickly find failing pods across all namespaces. Logs: How to check current and previous container logs to see why the app crashed. Environment: Validating ConfigMaps, Secrets, and Environment Variables. Probes: Detecting if a liveness or readiness probe is too aggressive. Resources: Checking for OOMKilled errors and CPU/Memory limits. Fix & Restart: Editing deployments and performing safe rolling restarts. Key Commands Covered: kubectl get pods -A | grep CrashLoopBackOff kubectl describe pod pod-name kubectl logs pod-name --previous kubectl get deployment name -o yaml kubectl edit deployment name kubectl rollout restart deployment name Timestamps: 0:00 - Intro: What is CrashLoopBackOff? 0:05 - Step 1: Identifying Failing Pods across Namespaces 0:30 - Step 2: Inspecting Logs and Exit Reasons (Current vs. Previous) 0:55 - Step 3: Verifying Configuration, Env Vars, and Probes 1:20 - Step 4: Validating Image, Entry Commands, and Resource Limits 1:45 - Step 5: Applying Fixes and Redeploying Safely #Kubernetes #K8s #DevOps #SRE #Troubleshooting #CrashLoopBackOff #CloudNative #Docker #kubectl