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=beada8dbe438cc896a191354a39740a7a5d5beaa

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