我发现k8s内coredns的解析结果有点问题。经常解析不出来。

/ # nslookup kubernetes-dashboard.kube-system.svc.cluster.local
Server:         10.253.255.10
Address:        10.253.255.10:53

Non-authoritative answer:

*** Can't find kubernetes-dashboard.kube-system.svc.cluster.local: No answer

/ # nslookup kubernetes-dashboard.kube-system.svc.cluster.local
Server:         10.253.255.10
Address:        10.253.255.10:53

Name:   kubernetes-dashboard.kube-system.svc.cluster.local
Address: 10.253.255.40

*** Can't find kubernetes-dashboard.kube-system.svc.cluster.local: No answer

/ # nslookup kubernetes-dashboard.kube-system.svc.cluster.local
Server:         10.253.255.10
Address:        10.253.255.10:53

Name:   kubernetes-dashboard.kube-system.svc.cluster.local
Address: 10.253.255.40

但是ping kubernetes-dashboard的话，一直是可以的。实际上我通过tcpdump抓包发现每次都是有响应的。非常奇怪。

[root@