dial tcp 10.96.0.1:443: getsockopt: no route to host --- kubernetes（k8s）DNS 服务反复重启

kubernetes（k8s）DNS 服务反复重启解决：

k8s.io/dns/pkg/dns/dns.go:150: Failed to list *v1.Service: Get https://10.96.0.1:443/api/v1/services?resourceVersion=0: dial tcp 10.96.0.1:443: getsockopt: no route to host

在使用 Minikube 部署 kubernetes 服务时，出现 Kube DNS 服务反复重启现象（错误如上），

这很可能是 iptables 规则乱了，我通过执行以下命令解决了，在此记录：

# systemctl stop kubelet
# systemctl stop docker
# iptables --flush
# iptables -tnat --flush
# systemctl start kubelet
# systemctl start docker