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Add a zone to CoreDNS

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

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

    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