'--dns flag equivalent for kubernetes yaml file?

I want the pods that are created in my Kubernetes cluster to be able to use my preexisting custom DNS server.

The DNS is on a separate machine and, when running docker containers, I could set this using the --dns flag.

Is it possible to replicate that in Kubernetes pods?
I am also open to other suggestions on how to do this.

Solution 1:^[1]

or you can configure it at a cluster level

More precisely, as in this gist, you can:

Configure kube-dns to use an upstream nameserver instead of the one in /etc/resolv.conf:

Save in configmap.yml:
apiVersion: v1
kind: ConfigMap
metadata:
 name: kube-dns
 namespace: kube-system
data:
 upstreamNameservers: |
   ["8.8.8.8"]
Then:
kubectl create -f configmap.yml

Official documentation: "CoreDNS configuration equivalent to kube-dn"

Also:

Retrieve nameserver kube-dns is using:

kubectl exec -ti -n kube-system \
  $(kubectl get --no-headers=true pods -l k8s-app=kube-dns \
            -o custom-columns=:metadata.name -n kube-system) \
  -c kubedns -- cat /etc/resolv.conf

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'--dns flag equivalent for kubernetes yaml file?

Solution 1:[1]

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Related Questions

Solution 1:^[1]