plugin/loop: Seen "HINFO IN 2050421060481615995.5620656063561519376." more than twice, loop detected

plugin/loop: Seen "HINFO IN 2050421060481615995.5620656063561519376." more than twice, loop detected

现象描述： 使用kubeadm 部署kubernetes 1.12.1后，发现dns pod的状态不稳定，一会running，一会error

1. 查看日志：

[root@master /]#kubectl logs coredns-55f86bf584-7sbtj -n kube-system
.:53
2018/10/09 10:20:15 [INFO] CoreDNS-1.2.2
2018/10/09 10:20:15 [INFO] linux/amd64, go1.11, eb51e8b
CoreDNS-1.2.2
linux/amd64, go1.11, eb51e8b
2018/10/09 10:20:15 [INFO] plugin/reload: Running configuration MD5 = 86e5222d14b17c8b907970f002198e96
2018/10/09 10:20:15 [FATAL] plugin/loop: Seen "HINFO IN 2050421060481615995.5620656063561519376." more than twice, loop detected

2. 如何解决？
   
   image
   
   
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   github上提供的主要解决方法：
   
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   主要参考文献：
   跟此问题相关的文章如下：
   https://github.com/coredns/coredns/issues/2087
   https://github.com/kubernetes/kubeadm/issues/998