k8s calico-node错误日志 listen tcp: lookup localhost on ip:53: no such host_lookup node on 223.5.5.5:53: no such host

问题描述：

• 查看pods状态，发现 calico-node异常

[root@k8s-master ~]# kubectl get pods --all-namespaces
NAMESPACE              NAME                                         READY   STATUS    RESTARTS   AGE
kube-system            calico-node-m5s7m                            0/1     Running   0          25s
kube-system            calico-node-s959x                            0/1     Running   0          12s
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• 查看日志提示 :

listen tcp: lookup localhost on ip:53: no such host
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• 原因分析：
  localhost未设置映射

• 解决方案：
  添加localhost映射：

#vi /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
 
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