Reduce the Kube DNS replicas on GKE

Question

I do not require highly available DNS resolution, And therefore wish to reduce the number of Kube DNS replicas to one. How do I go about achieving this?

Answer 1

If your cluster doesn't require highly available DNS resolution, you can conserve cluster resources by turning off Kube DNS horizontal autoscaling and reducing the number of replicas to one.

To turn off the kube-dns autoscaler and reduce kube-dns to a single replica:

kubectl scale --replicas=0 deployment/kube-dns-autoscaler --namespace=kube-system kubectl scale --replicas=1 deployment/kube-dns --namespace=kube-system

To enable autoscaling:

kubectl scale --replicas=1 deployment/kube-dns-autoscaler --namespace=kube-system

For more precise control of autoscaling, you can tune the [autoscaling parameters]