Kubernetes Troubleshooting Guide: Real-Time Scenarios & Solutions

Kubernetes is powerful, but with that power comes complexity. In real-world DevOps environments, issues like pod failures, scheduling problems, and resource mismanagement are common. Understanding how to troubleshoot these effectively is what separates a beginner from a skilled DevOps engineer. ImagePullBackOff Issue One of the most common errors in Kubernetes is ImagePullBackOff, which occurs when a container image cannot be pulled. Causes: Invalid or non-existent image Private repository without authentication Solution: For private images, use ImagePullSecrets: kubectl create secret docker-registry demo --docker-server=your-registry-server --docker-username=your-name --docker-password=your-password --docker-email=your-email Then reference it in your deployment: spec: imagePullSecrets: - name: demo For AWS ECR: kubectl create secret docker-registry ecr-secret --docker-server=${AWS_ACCOUNT}.dkr.ecr.${AWS_REGION}.amazonaws.com --docker-username=AWS --docker-password=$(aws ecr get-login-