我有一个服务无法回复一些 HTTP 请求，挖掘它的日志它似乎是到达 proxy 服务时的某种 DNS 故障
'proxy' failed to resolve 'proxy.default.svc.cluster.local' after 2 queries
所以我找不到任何错误并尝试了
kubectl rollout restart deployment/backend 。就在这之后，这些出现在 pod 列表中:
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
(以及更多这些)
所以我又添加了两个节点，现在一切似乎都很好，除了这个我不明白的错误状态的大 pod 列表。这是什么
UnexpectedAdmissionError ，我该怎么办？注意:这是一个 DigitalOcean 集群
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"}
以下似乎很重要:
kubectl describe one_failed_podEvents:
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.
最佳答案
我遇到了同样的问题，在描述一个带有 UnexpectedAdmissionError 的 pod 时，我看到了以下内容:
由于未能写入设备插件检查点文件“kubelet_internal_checkpoint”而更新插件资源失败:写入/var/lib/kubelet/device-plugins/.525608957:设备上没有剩余空间，这是意外。
在做描述节点时:
OutOfDisk Unknown 2020 年 6 月 30 日星期二 14:07:04 -0400 2020 年 6 月 30 日星期二 14:12:05 -0400 NodeStatusUnknown Kubelet 停止发布节点状态。
我通过重新启动节点解决了这个问题
关于推出后 kubernetes UnexpectedAdmissionError，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/58455833/