Amos Wenger walks through his production incident where adding a home computer as a Kubernetes node caused TLS certificate renewals to fail. The discussion covers debugging techniques using tools like netshoot and K9s, and explores the unexpected interactions between Kubernetes overlay networks and consumer routers.
You will learn:
How Kubernetes networking assumptions break when mixing cloud VMs with nodes behind consumer routers, and why cert-manager challenges fail in NAT environments
The differences between CNI plugins like Flannel and Calico, particularly how they handle IPv6 translation
Debugging techniques for network issues using tools like netshoot, K9s, and iproute2
Best practices for mixed infrastructure including proper node labeling, taints, and scheduling controls
Sponsor
This episode is sponsored by LearnKube — get started on your Kubernetes journey through comprehensive online, in-person or remote training.
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