How to disable Kube-DNS on GKE

Question

I have a CoreDNS running in our cluster that uses the Kube DNS service. I want to disable the AutoScaler and the Kube-DNS deployment or scale it to 0.

As soon as I do this, however, it is always automatically scaled up to 2. What can I do?

Answer 1

The scenario you are going through is described by the official documentation.

• Make sure that you created your custom CoreDNS as described here.

• Disable the kube-dns managed by GKE by scaling the kube-dns Deployment and autoscaler to zero using the following command:

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kubectl scale deployment --replicas=0 kube-dns-autoscaler --namespace=kube-system
kubectl scale deployment --replicas=0 kube-dns --namespace=kube-system

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• If the above command will still not work than try the following one:

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kubectl scale --replicas=0 deployment/kube-dns-autoscaler --namespace=kube-system 

kubectl scale --replicas=0 deployment/kube-dns --namespace=kube-system

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Remember to specify the namespace.