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本篇内容主要讲解“怎么解决 go 中的 notready 问题”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让丸趣 TV 小编来带大家学习“怎么解决 go 中的 notready 问题”吧!
环境：
[root@k8s-01 ing]# kubectl version
Server Version: version.Info{Major: 1 , Minor: 21 , GitVersion: v1.21.0 , GitCommit: cb303e613a121a29364f75cc67d3d580833a7479 , GitTreeState: clean , BuildDate: 2021-04-08T16:25:
06Z , GoVersion: go1.16.1 , Compiler: gc , Platform: linux/amd64 }[root@k8s-01 ing]# kubectl version |grep server
[root@k8s-01 ing]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-01 Ready control-plane,master 18d v1.21.0
k8s-02 Ready worker 18d v1.21.0
k8s-03 Ready worker 18d v1.21.0现象：
k8s-02 节点处于 notready 状态，查看 pod 的 terminating 时间点，7h 以前；查看 messages 日志，报错也是从 7h 以前开始的。
排查过程 1、检查网络连通性
并且该节点处于单通状态：master 和其他节点可以 ping 通 k8s-02 机器，k8s-02 不能 ping 通其他机器。
确实网络有问题，于是查看 calico 的 pod 状态 是 ok 的，calico-kube-controller 也故障转移了。
describe 如下：
进行抓 k8s-02 的 icmp 包，master 接收到了 但不给回复：
tcpdump -i eth0 icmp and host 10.170.36.462、kubelet 排查
到这里网络排查 没有头绪，开始根据 describe 的内容查看 kubelet 并百度：
百度都是防火墙、关闭 swap 等等操作，但是我这里都没有……重启节点、重启 kubelet 都不行！
查看日志 messages：
May 11 21:27:58 k8s-02 kubelet: I0511 21:27:58.469919 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:27:59 k8s-02 kubelet: I0511 21:27:59.469278 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:00 k8s-02 kubelet: I0511 21:28:00.469261 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:00 k8s-02 kubelet: E0511 21:28:00.598812 651 event.go:273] Unable to write event: v1.Event{TypeMeta:v1.TypeMeta{Kind: , APIVersion:}, ObjectMeta:v1.Obje
ctMeta{Name: k8s-02.167e04da740613a2 , GenerateName: , Namespace: default , SelfLink: , UID: , ResourceVersion: , Generation:0, CreationTimestamp:v1.Time{Time:time.Time{wall:0x0, ext:0, loc:(*time.Location)(nil)}}, DeletionTimestamp:(*v1.Time)(nil), DeletionGracePeriodSeconds:(*int64)(nil), Labels:map[string]string(nil), Annotations:map[string]string(nil), OwnerReferences:[]v1.OwnerReference(nil), Finalizers:[]string(nil), ClusterName: , ManagedFields:[]v1.ManagedFieldsEntry(nil)}, InvolvedObject:v1.ObjectReference{Kind: Node , Namespace: , Name: k8s-02 , UID: k8s-02 , APIVersion: , ResourceVersion: , FieldPath:}, Reason: NodeHasSufficientPID , Message: Node k8s-02 status is now: NodeHasSufficientPID , Source:v1.EventSource{Component: kubelet , Host: k8s-02}, FirstTimestamp:v1.Time{Time:time.Time{wall:0xc01ebe130bad1ba2, ext:12673521163, loc:(*time.Location)(0x74ad9e0)}}, LastTimestamp:v1.Time{Time:time.Time{wall:0xc01ebe130bad1ba2, ext:12673521163, loc:(*time.Location)(0x74ad9e0)}}, Count:1, Type: Normal , EventTime:v1.MicroTime{Time:time.Time{wall:0x0, ext:0, loc:(*time.Location)(nil)}}, Series:(*v1.EventSeries)(nil), Action: , Related:(*v1.ObjectReference)(nil), ReportingController: , ReportingInstance: } : Post https://10.170.2.32:6443/api/v1/namespaces/default/events : dial tcp 10.170.2.32:6443: i/o timeout (may retry after sleeping)May 11 21:28:01 k8s-02 kubelet: I0511 21:28:01.469790 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:02 k8s-02 kubelet: I0511 21:28:02.406629 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:02 k8s-02 kubelet: I0511 21:28:02.406669 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:02 k8s-02 kubelet: I0511 21:28:02.469338 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:03 k8s-02 kubelet: I0511 21:28:03.407443 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:03 k8s-02 kubelet: I0511 21:28:03.469928 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:03 k8s-02 kubelet: I0511 21:28:03.617223 651 trace.go:205] Trace[766683077]: Reflector ListAndWatch name:k8s.io/client-go/informers/factory.go:134 (11-May-
2021 21:27:33.615) (total time: 30001ms):May 11 21:28:03 k8s-02 kubelet: Trace[766683077]: [30.001402015s] [30.001402015s] END
May 11 21:28:03 k8s-02 kubelet: E0511 21:28:03.617257 651 reflector.go:138] k8s.io/client-go/informers/factory.go:134: Failed to watch *v1.Service: failed to list *v1.Ser
vice: Get https://10.170.2.32:6443/api/v1/services?limit=500 resourceVersion=0 : dial tcp 10.170.2.32:6443: i/o timeoutMay 11 21:28:04 k8s-02 kubelet: I0511 21:28:04.407120 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:04 k8s-02 kubelet: I0511 21:28:04.469376 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:05 k8s-02 kubelet: I0511 21:28:05.407095 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:05 k8s-02 kubelet: I0511 21:28:05.469475 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:05 k8s-02 kubelet: I0511 21:28:05.769847 651 trace.go:205] Trace[347094812]: Reflector ListAndWatch name:k8s.io/client-go/informers/factory.go:134 (11-May-
2021 21:27:35.768) (total time: 30000ms):May 11 21:28:05 k8s-02 kubelet: Trace[347094812]: [30.000987614s] [30.000987614s] END
May 11 21:28:05 k8s-02 kubelet: E0511 21:28:05.769907 651 reflector.go:138] k8s.io/client-go/informers/factory.go:134: Failed to watch *v1.CSIDriver: failed to list *v1.C
SIDriver: Get https://10.170.2.32:6443/apis/storage.k8s.io/v1/csidrivers?limit=500 resourceVersion=0 : dial tcp 10.170.2.32:6443: i/o timeoutMay 11 21:28:06 k8s-02 kubelet: I0511 21:28:06.407171 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:06 k8s-02 kubelet: I0511 21:28:06.469821 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:06 k8s-02 kubelet: I0511 21:28:06.469863 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:06 k8s-02 kubelet: E0511 21:28:06.469887 651 kubelet.go:2298] Error getting node err= nodes have not yet been read at least once, cannot construct node obj
ect May 11 21:28:06 k8s-02 kubelet: I0511 21:28:06.570550 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:06 k8s-02 kubelet: I0511 21:28:06.570599 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:07 k8s-02 kubelet: I0511 21:28:07.407416 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:07 k8s-02 kubelet: I0511 21:28:07.571241 651 kubelet.go:461] Kubelet nodes not sync
May 11 21:28:08 k8s-02 kubelet: I0511 21:28:08.407052 651 kubelet.go:461] Kubelet nodes not sync
日志也百度了，总之就是连不上 master……
3、根据时间点排查
查看 pod 停止时间：
同时根据 messages 里面的日志开始报错时间 和 pod 停止时间一致，所以排查当时时间点做了什么操作，排查 恢复即可！
4、万能解决方案
重启大法：
重启节点、重启 kubelet 无效！
解决方案
找到时间点的历史命令，做了 externalIp 操作，并且和 k8s-02 的 ip 一致，删除 externalIp 网络恢复，节点 ready！
== 将 ipvs 换成 iptables 就可以正常使用 externalIp！==
到此，相信大家对“怎么解决 go 中的 notready 问题”有了更深的了解，不妨来实际操作一番吧！这里是丸趣 TV 网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
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