hongming
好像离真相越来越近了！
因为我们的集群是在内网，我刚刚查看了主机的resolv.conf，发现是空：
然后编辑 coredns的configmap 发现没有proxy，是forward
kubectl -n kube-system edit configmap coredns
`apiVersion: v1
data:
Corefile: |
.:53 {
errors
health
kubernetes cluster.local in-addr.arpa ip6.arpa {
pods insecure
upstream
fallthrough in-addr.arpa ip6.arpa
}
prometheus :9153
forward . /etc/resolv.conf
cache 30
loop
reload
loadbalance
}
kind: ConfigMap
metadata:
creationTimestamp: “2019-11-09T09:17:10Z”
name: coredns
namespace: kube-system
resourceVersion: “173″
selfLink: /api/v1/namespaces/kube-system/configmaps/coredns
uid: b5bebbd8-02d1-11ea-ab1a-005056a1cd99`
