DEV Community

Debashis Sikdar
Debashis Sikdar

Posted on

1

Understand Kubernetes Troubleshooting Cheat Sheet Now

Understand Kubernetes Troubleshooting Cheat Sheet Now
Kubernetes is a powerful platform for managing containerized applications, but troubleshooting it can feel overwhelming, especially for newcomers. This cheat sheet is designed to simplify the process, providing practical tips to resolve common issues efficiently.

Why Troubleshooting Kubernetes Matters

When your Kubernetes cluster encounters issues, it can disrupt your applications, impacting productivity and user experience. Mastering troubleshooting ensures your cluster remains stable and secure while minimizing downtime.

Key Areas Covered in the Cheat Sheet

  1. Nodes and Pods

Common Issue: Nodes not ready.Solution: Check the node status with kubectl get nodes. Investigate system resources, network issues, or misconfigurations.
Common Issue: Pods stuck in Pending.Solution: Use kubectl describe pod [POD_NAME] to identify resource allocation problems or unsatisfied dependencies.

  1. Networking Issues

Common Issue: Services not reachable.Solution: Verify the service status with kubectl get svc. Check DNS settings and network policies for misconfigurations.
Tools: Utilize kubectl logs, kubectl exec, and network monitoring tools like Calico or Weave for deeper insights.

  1. Storage Problems

Common Issue: PersistentVolume (PV) not bound.Solution: Ensure that PersistentVolumeClaim (PVC) matches the PV. Use kubectl describe pvc to debug.
Pro Tip: Confirm your storage class and capacity configurations.

  1. Logs and Events

Key Command: kubectl logs [POD_NAME] to view container logs.
Tip: Use kubectl get events to capture real-time cluster activities and identify potential issues.

Cheat Sheet Best Practices:

Understand Resource Limits: Overcommitting CPU or memory can lead to Pod eviction or throttling.

Monitor Regularly: Integrate tools like Prometheus, Grafana, or ELK stack for proactive monitoring.

Automate Health Checks: Set up Kubernetes liveness and readiness probes to minimize manual interventions.

Your Go-To Commands at a Glance

Cluster Health:kubectl cluster-info
kubectl get componentstatus
Pod Debugging:kubectl describe pod [POD_NAME]
kubectl exec -it [POD_NAME] — /bin/sh
Service Verification:kubectl describe svc [SERVICE_NAME]
kubectl get endpoints

By using this cheat sheet, you can address common Kubernetes issues with confidence and ensure your applications run smoothly. Mastering troubleshooting is key to becoming a Kubernetes expert, empowering you to maintain resilient, high-performing systems.

Image of Timescale

Timescale – the developer's data platform for modern apps, built on PostgreSQL

Timescale Cloud is PostgreSQL optimized for speed, scale, and performance. Over 3 million IoT, AI, crypto, and dev tool apps are powered by Timescale. Try it free today! No credit card required.

Try free

Top comments (0)

Billboard image

The Next Generation Developer Platform

Coherence is the first Platform-as-a-Service you can control. Unlike "black-box" platforms that are opinionated about the infra you can deploy, Coherence is powered by CNC, the open-source IaC framework, which offers limitless customization.

Learn more

👋 Kindness is contagious

Discover a treasure trove of wisdom within this insightful piece, highly respected in the nurturing DEV Community enviroment. Developers, whether novice or expert, are encouraged to participate and add to our shared knowledge basin.

A simple "thank you" can illuminate someone's day. Express your appreciation in the comments section!

On DEV, sharing ideas smoothens our journey and strengthens our community ties. Learn something useful? Offering a quick thanks to the author is deeply appreciated.

Okay