TGIK

In this episode

Come hang out with Luke Short (@ekultails) and learn about CoreDNS. Luke works with a lot of customers directly to make Kubernetes work for them. Over the past week he has been going down a deep rabbit hole around CoreDNS and will share those experiences and learnings with you! Come along for the ride!

Show notes: https://github.com/vmware-tanzu/tgik/tree/master/episodes/147

Timestamps:

• 00:00:40 - Welcome to TGIK!
• 00:06:03 - Week in Review
• 00:24:55 - Katacoda Kubernetes Playground
• 00:26:33 - CoreDNS Introduction
• 00:30:56 - CoreDNS Plugins
• 00:32:38 - CoreDNS Internal Plugin: File
• 00:34:28 - CoreDNS DNS Records
• 00:37:19 - Story time! Luke’s first container was a DNS server
• 00:38:44 - Kubernetes at Scale: https://openai.com/blog/scaling-kubernetes-to-7500-nodes/
• 00:39:34 - Chat - What DNS servers do you use?
• 00:41:38 - CoreDNS Pods on Kubernetes
• 00:43:57 - Luke making spelling mistakes :-)
  • Luke thought he was being trolled by him resizing the window. Sometimes that will move the cursor around in the Kubernetes Playground in unpredictable ways.
• 00:45:10 - Moving to Luke’s home Kubernetes cluster
  • Configuring CoreDNS in Kubernetes
• 00:49:28 - Load balancing with DNS
• 00:51:48 - View all CoreDNS plugins
  • Preview the “records” and “unbound” plugins
  • Authoritative vs recursive
• 00:54:32 - CoreDNS external plugins require recompilation
• 00:55:55 coredns-unbound project
• 00:56:24 Public container registries
• 00:59:29 How to compile CoreDNS with plugins
• 01:01:22 CoreDNS demo of customizing Corefile on Kubernetes
• 01:21:18 CoreDNS demo of adding customized DNS records
• 01:40:09 Documentation for customizing CoreDNS in Kubernetes
• 01:43:29 Outro