如何重启 kubernetes 节点? [英] How to restart kubernetes nodes?

问题描述

节点状态报告为unknown

"conditions": [
          {
            "type": "Ready",
            "status": "Unknown",
            "lastHeartbeatTime": "2015-11-12T06:03:19Z",
            "lastTransitionTime": "2015-11-12T06:04:03Z",
            "reason": "Kubelet stopped posting node status."
          }

whle kubectl get nodes 返回 NOTReady 状态.这意味着什么以及如何解决这个问题?

whle kubectl get nodes return a NOTReady status. What does this imply and how to fix this?

推荐答案

获取节点

kubectl get nodes

结果:

NAME            STATUS     AGE
192.168.1.157   NotReady   42d
192.168.1.158   Ready      42d
192.168.1.159   Ready      42d

描述节点

这是192.168.1.157节点上的NotReady.然后调试这个notready节点，可以阅读官方文档——Application Introspection and Debugging.

Describe node

Here is a NotReady on the node of 192.168.1.157. Then debugging this notready node, and you can read offical documents - Application Introspection and Debugging.

kubectl describe node 192.168.1.157

部分结果:

Conditions:
Type          Status          LastHeartbeatTime                       LastTransitionTime                      Reason                  Message
----          ------          -----------------                       ------------------                      ------                  -------
OutOfDisk     Unknown         Sat, 28 Dec 2016 12:56:01 +0000         Sat, 28 Dec 2016 12:56:41 +0000         NodeStatusUnknown       Kubelet stopped posting node status.
Ready         Unknown         Sat, 28 Dec 2016 12:56:01 +0000         Sat, 28 Dec 2016 12:56:41 +0000         NodeStatusUnknown       Kubelet stopped posting node status.

我的节点上有一个 OutOfDisk，然后 Kubelet 停止发布节点状态.所以，我必须释放一些磁盘空间，在我的 Ubuntu14.04 上使用 df 命令我可以检查内存的详细信息，并使用 docker 命令rmi image_id/image_name 在su的作用下我可以删除无用的图像.

There is a OutOfDisk on my node, then Kubelet stopped posting node status. So, I must free some disk space, using the command of df on my Ubuntu14.04 I can check the details of memory, and using the command of docker rmi image_id/image_name under the role of su I can remove the useless images.

使用ssh登录192.168.1.157，如ssh administrator@192.168.1.157，并通过<切换到'su'代码>sudo su;

Login in 192.168.1.157 by using ssh, like ssh administrator@192.168.1.157, and switch to the 'su' by sudo su;

/etc/init.d/kubelet restart

结果:

stop: Unknown instance: 
kubelet start/running, process 59261

再次获取节点

在主站上:

kubectl get nodes

结果:

NAME            STATUS    AGE
192.168.1.157   Ready     42d
192.168.1.158   Ready     42d
192.168.1.159   Ready     42d

好的，那个节点工作正常.

Ok, that node works fine.

这是一个参考:Kubernetes

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