coredns.yaml

# WARNING:
# Your coredns config may have changed.
# You should take a backup of your coredns configmap before applying this
# Or, just add the `rewrite stop {}` block to your own coredns configmap.
# kubectl -n kube-system get configmap coredns > backup.yaml
#
# The below works with kube 1.16

apiVersion: v1
kind: ConfigMap
metadata:
  name: coredns
  namespace: kube-system
data:
  Corefile: |
    .:53 {
        errors
        health
        ready
        rewrite stop {
          name regex (.*)\.server\.lan {1}.default.svc.cluster.local
          answer name (.*)\.default\.svc\.cluster\.local {1}.server.lan
        }
        kubernetes cluster.local in-addr.arpa ip6.arpa {
          pods insecure
          fallthrough in-addr.arpa ip6.arpa
        }
        prometheus :9153
        forward . /etc/resolv.conf
        cache 30
        loop
        reload
        loadbalance
    }