Table of Contents

Common EKS Issues

EKS troubleshooting requires understanding both Kubernetes fundamentals and AWS-specific configurations. Here are the most frequent issues:

Pod Startup Problems

  • ImagePullBackOff - Registry access and authentication issues
  • CrashLoopBackOff - Application configuration and resource problems
  • Pending Pods - Resource constraints and scheduling failures

Essential Debugging Techniques

Master these kubectl commands and AWS CLI techniques for effective EKS troubleshooting:

# Check pod status and events
kubectl describe pod <pod-name>
kubectl logs <pod-name> --previous

# Node and cluster diagnostics
kubectl get nodes -o wide
kubectl describe node <node-name>

Networking Problems

EKS networking involves VPC CNI, security groups, and AWS Load Balancers. Common issues include:

  • Service discovery failures
  • Ingress controller misconfigurations
  • Security group restrictions

Performance Optimization

Optimize your EKS clusters for better performance and cost efficiency:

  • Right-sizing worker nodes
  • Implementing Horizontal Pod Autoscaler
  • Cluster Autoscaler configuration

Take Your Skills Further

Ready to practice these concepts? Our EKS Troubleshooting Workshop provides hands-on scenarios with real AWS environments.

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