DNS resolution is a vital component of any application infrastructure on Kubernetes. When your application code attempts to access another service in the Kubernetes cluster or even a service on the internet, it has to first lookup the IP address corresponding to the hostname of the service, before initiating a connection to the service. This name lookup process is often referred to as service discovery. In Kubernetes, the cluster DNS server, be it kube-dns or CoreDNS, resolves the service’s...
