Nslookup kubernetes does not give result

General Discussions
1

I use kubernetes 1.14.0 and use flannel as CNI.

I had issue with nslookup kubernetes or any service. I finally did reinstall of kube-dns forcefully [https://github.com/kubernetes/kubernetes/issues/63900#issuecomment-430534767]. After this I see the result as
/ # nslookup kubernetes
Server: 10.96.0.10
Address: 10.96.0.10:53

Name: kubernetes.default.svc.cluster.local
Address: 10.96.0.1

*** Can’t find kubernetes.svc.cluster.local: No answer
*** Can’t find kubernetes.cluster.local: No answer
*** Can’t find kubernetes.ent.bhicorp.com: No answer
*** Can’t find kubernetes.default.svc.cluster.local: No answer
*** Can’t find kubernetes.svc.cluster.local: No answer
*** Can’t find kubernetes.cluster.local: No answer
*** Can’t find kubernetes.ent.bhicorp.com: No answer

/ # nc 10.96.0.10 53 -v
10.96.0.10 (10.96.0.10:53) open
^Cpunt!

2

kubectl run test-nslookup --image=busybox:1.28 --rm -it --restart=Never – nslookup nginx-resolver-service
kubectl get pod nginx-resolver -o wide
kubectl run test-nslookup --image=busybox:1.28 --rm -it --restart=Never – nslookup <P-O-D-I-P.default.pod>