| Reference | URL |
|---|---|
| Configuring DNS Servers for Kubernetes Clusters | https://docs.oracle.com/en-us/iaas/Content/ContEng/Tasks/contengconfiguringdnsserver.htm |
| Customizing DNS Service | https://kubernetes.io/docs/tasks/administer-cluster/dns-custom-nameservers/ |
| Debugging DNS Resolution | https://kubernetes.io/docs/tasks/administer-cluster/dns-debugging-resolution/ |