Building and Operating a Highly Reliable Cloud Native DNS Service With Open Source Technologies

This talk explores the deployment, operation, and automation of a highly available and geo-redundant DNS service tailored for Swisscom's 5G mobile network using a Cloud Native tech stack. The speakers provide an in-depth look at their multi-cluster architecture that integrates ExternalDNS, PowerDNS, and CoreDNS to create a modern and reliable DNS setup. The session delves into the automation processes, demonstrating the interactions between ExternalDNS and various Kubernetes resources such as Ingresses, Services, Istio Gateways, and Contour HTTPProxies. This presentation is particularly relevant for DNS users requiring advanced DNS Resource Records, like NAPTR, as well as engineers and architects tasked with developing compliant, cloud-native DNS services.