dns

Client requests for CoreDNS service

This example demonstrates how an external client configures DNS from the connected endpoint. Note: NSE provides DNS by itself. Also, NSE could provide configs for any other external DNS servers(that are not located as sidecar with NSE).

Requires

Make sure that you have completed steps from features

Run

Deploy alpine and nse

kubectl apply -k https://github.com/networkservicemesh/deployments-k8s/examples/features/dns?ref=c91be29099fab1f8376d9ff90c858efd829de35e

Wait for applications ready:

kubectl wait --for=condition=ready --timeout=5m pod dnsutils -n ns-dns

kubectl wait --for=condition=ready --timeout=5m pod -l app=nse-kernel -n ns-dns

Ping from dnsutils to NSE by domain name:

kubectl exec pods/dnsutils -c dnsutils -n ns-dns -- nslookup -norec -nodef my.coredns.service

kubectl exec pods/dnsutils -c dnsutils -n ns-dns -- ping -c 4 my.coredns.service

Validate that default DNS server is working:

kubectl exec pods/dnsutils -c dnsutils -n ns-dns -- dig kubernetes.default A kubernetes.default AAAA | grep "kubernetes.default.svc.cluster.local"

Cleanup

Delete ns:

kubectl delete ns ns-dns