6 Troubleshooting large-scale network errors

This chapter covers

  • Confirming cluster functionality with Sonobuoy
  • Tracing a Pod’s data path
  • Using the arp and ip commands to inspect CNI routing
  • A deeper look at kube-proxy and iptables
  • An introduction to Layer 7 networking (the ingress resource)

In this chapter, we’ll go over a few touchpoints for troubleshooting large-scale network errors. We also introduce Sonobuoy, a Swiss Army knife for certifying, diagnosing, and testing the functionality of live Kubernetes clusters, which is a commonly used diagnosis tool for Kubernetes.

Sonobuoy compared with the Kubernetes e2e (end-to-end) tests

Sonobuoy runs the Kubernetes e2e testing suite in a container and makes it easy to retrieve, store, and archive ...

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