问题描述
我有一项服务无法回复某些HTTP请求，挖掘了它的日志，发现到达proxy服务时似乎出现了某种DNS故障
I had a service failing to reply to some HTTP requests, digging it's logs it seemed to be some sort of DNS failure on reaching a proxy service
'proxy' failed to resolve 'proxy.default.svc.cluster.local' after 2 queries
所以我找不到任何错误，然后尝试了kubectl rollout restart deployment/backend.紧接着这些出现在豆荚列表中:
So I could not find anything wrong and tried kubectl rollout restart deployment/backend.Just after that these appeared in the pods list:
backend-54769cbb4-xkwf2 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-xlpgf 0/1 UnexpectedAdmissionError 0 4h4m
backend-54769cbb4-xmnr5 0/1 UnexpectedAdmissionError 0 4h7m
backend-54769cbb4-xmq5n 0/1 UnexpectedAdmissionError 0 4h7m
backend-54769cbb4-xphrw 0/1 UnexpectedAdmissionError 0 4h5m
backend-54769cbb4-xrmrq 0/1 UnexpectedAdmissionError 0 4h1m
backend-54769cbb4-xrmw8 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-xt4ck 0/1 UnexpectedAdmissionError 0 4h4m
backend-54769cbb4-xws8r 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-xx6r4 0/1 UnexpectedAdmissionError 0 4h5m
backend-54769cbb4-xxpfd 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-xzjql 0/1 UnexpectedAdmissionError 0 4h4m
backend-54769cbb4-xzzlk 0/1 UnexpectedAdmissionError 0 4h7m
backend-54769cbb4-z46ms 0/1 UnexpectedAdmissionError 0 4h5m
backend-54769cbb4-z4sl7 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-z6jpj 0/1 UnexpectedAdmissionError 0 4h5m
backend-54769cbb4-z6ngq 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-z8w4h 0/1 UnexpectedAdmissionError 0 4h5m
backend-54769cbb4-z9jqb 0/1 UnexpectedAdmissionError 0 4h3m
backend-54769cbb4-zbvqm 0/1 UnexpectedAdmissionError 0 4h2m
backend-54769cbb4-zcfxg 0/1 UnexpectedAdmissionError 0 4h3m
backend-54769cbb4-zcvqm 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-zf2f8 0/1 UnexpectedAdmissionError 0 4h2m
backend-54769cbb4-zgnkh 0/1 UnexpectedAdmissionError 0 4h7m
backend-54769cbb4-zhdr8 0/1 UnexpectedAdmissionError 0 4h2m
backend-54769cbb4-zhx6g 0/1 UnexpectedAdmissionError 0 4h7m
backend-54769cbb4-zj8f2 0/1 UnexpectedAdmissionError 0 4h3m
backend-54769cbb4-zjbwp 0/1 UnexpectedAdmissionError 0 4h5m
backend-54769cbb4-zjc8g 0/1 UnexpectedAdmissionError 0 4h3m
backend-54769cbb4-zjdcp 0/1 UnexpectedAdmissionError 0 4h4m
backend-54769cbb4-zkcrb 0/1 UnexpectedAdmissionError 0 4h7m
backend-54769cbb4-zlpll 0/1 UnexpectedAdmissionError 0 4h2m
backend-54769cbb4-zm2cx 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-zn7mr 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-znjkp 0/1 UnexpectedAdmissionError 0 4h3m
backend-54769cbb4-zpnk7 0/1 UnexpectedAdmissionError 0 4h2m
backend-54769cbb4-zrrl7 0/1 UnexpectedAdmissionError 0 4h2m
backend-54769cbb4-zsdsz 0/1 UnexpectedAdmissionError 0 4h4m
backend-54769cbb4-ztdx8 0/1 UnexpectedAdmissionError 0 4h2m
backend-54769cbb4-ztln6 0/1 UnexpectedAdmissionError 0 4h2m
backend-54769cbb4-ztplg 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-ztzfh 0/1 UnexpectedAdmissionError 0 4h2m
backend-54769cbb4-zvb8g 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-zwsr8 0/1 UnexpectedAdmissionError 0 4h7m
backend-54769cbb4-zwvxr 0/1 UnexpectedAdmissionError 0 4h5m
backend-54769cbb4-zwx6h 0/1 UnexpectedAdmissionError 0 4h6m
backend-54769cbb4-zz4bf 0/1 UnexpectedAdmissionError 0 4h1m
backend-54769cbb4-zzq6t 0/1 UnexpectedAdmissionError 0 4h2m
(还有更多)
所以我又添加了两个节点，现在一切似乎都很好，除了这个大的Pod列表(处于错误状态，我不理解). UnexpectedAdmissionError是什么，我该怎么办?
So I added two more nodes, and now everything seems fine except for this big list of pods in an error state which I don't understand. What is this UnexpectedAdmissionError, and what should I do about it?
注意:这是一个DigitalOcean集群
Note: this is a DigitalOcean cluster
Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.3", GitCommit:"2d3c76f9091b6bec110a5e63777c332469e0cba2", GitTreeState:"clean", BuildDate:"2019-08-19T12:38:36Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.3", GitCommit:"2d3c76f9091b6bec110a5e63777c332469e0cba2", GitTreeState:"clean", BuildDate:"2019-08-19T11:05:50Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
以下内容似乎很重要:kubectl describe one_failed_pod
The following seems important: kubectl describe one_failed_pod
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 2m51s default-scheduler Successfully assigned default/backend-549f576d5f-xzdv4 to std-16gb-g7mo
Warning UnexpectedAdmissionError 2m51s kubelet, std-16gb-g7mo Update plugin resources failed due to failed to write checkpoint file "kubelet_internal_checkpoint": write /var/lib/kubelet/device-plugins/.543592130: no space left on device, which is unexpected.
推荐答案
我遇到了同样的问题，同时描述了带有UnexpectedAdmissionError的Pod之一时，我看到了以下内容:
I had the same issue, while describing one of the pods with UnexpectedAdmissionError I saw the following:
由于无法写入deviceplugin检查点文件"kubelet_internal_checkpoint"，导致更新插件资源失败:写入/var/lib/kubelet/device-plugins/.525608957:设备上没有剩余空间，这是意外的.
Update plugin resources failed due to failed to write deviceplugin checkpoint file "kubelet_internal_checkpoint": write /var/lib/kubelet/device-plugins/.525608957: no space left on device, which is unexpected.
在描述节点时:
OutOfDisk Unknown星期二，2020年6月30日14:07:04 -0400 Tue，2020年6月30日14:12:05 -0400 NodeStatusUnknown Kubelet停止发布节点状态.
OutOfDisk Unknown Tue, 30 Jun 2020 14:07:04 -0400 Tue, 30 Jun 2020 14:12:05 -0400 NodeStatusUnknown Kubelet stopped posting node status.
我通过重新启动节点来解决了这个问题
I resolved this by rebooting node
这篇关于推出后的kubernetes UnexpectedAdmissionError的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！