Getting rid of EKS DNS issues at scale

Using node local caching on your Kubernetes nodes to reduce CoreDNS traffic

CoreDNS 1.5.

This page provides hints on diagnosing DNS problems. Before you begin You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster. It is recommended to run this tutorial on a cluster with at least two nodes that are not acting as control plane hosts. If you do not already have a cluster, you can create one by using minikube or you can use one of these Kubernetes playgrounds:

Overview I was playing around with my home Kubernetes cluster and decided to try out Node Local DNS Cache. It’s a really cool piece of software, that helps with DNS load by caching most of responses on the node local DNS and solves Linux conntrack races, which cause intermittent delays of 5s for some DNS … Continue reading Kubernetes Node Local DNS Cache →

In this post, I'll talk about how I learnt about FQDN, Search Paths and ndots to tackle slow DNS resolution in Kubernetes