校验k8s-dns

验证k8s DNS是否可用

kubectl run curl --image=radial/busyboxplus:curl -it

If you don't see a command prompt, try pressing enter.
[ root@curl:/ ]$

进入后执行nslookup kubernetes.default确认解析正常:

nslookup kubernetes.default
Server:    10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local

Name:      kubernetes.default
Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local