Add a zone to CoreDNS

Last update: October 05 2026Open in Markdown

To add a custom zone to the CoreDNS configuration in the cluster, use a ConfigMap.

1. Create a manifest for the ConfigMap. Specify the name coredns-custom and the namespace kube-system. The name of the file created via the ConfigMap must end with the suffix .custom. Manifest example:

   apiVersion: v1
   kind: ConfigMap
   metadata:
       name: coredns-custom
       namespace: kube-system
   data:
       test.custom: |
         example.com:53 {
           whoami
         }

2. Restart the CoreDNS pods:

   kubectl delete po -n kube-system -l k8s-app=kube-dns