kubernetes - Kubernetes Pod处于初始化阶段

Question

我一直在某些 pod 停留在初始化阶段遇到问题。
运行pod describe命令时没有看到任何错误。这是事件列表:

Events:
  Type     Reason     Age              From                                                   Message
  ----     ------     ----             ----                                                   -------
  Normal   Scheduled  5m               default-scheduler                                      Successfully assigned infrastructure/jenkins-74cc957b47-mxvqd to ip-XX-XX-XXX-XXX.eu-west-1.compute.internal
  Warning  BackOff    3m (x3 over 4m)  kubelet, ip-XX-XX-XXX-XXX.eu-west-1.compute.internal  Back-off restarting failed container
  Normal   Pulling    3m (x4 over 5m)  kubelet, ip-XX-XX-XXX-XXX.eu-west-1.compute.internal  pulling image "jenkins/jenkins:lts"
  Normal   Pulled     3m (x4 over 5m)  kubelet, ip-XX-XX-XXX-XXX.eu-west-1.compute.internal  Successfully pulled image "jenkins/jenkins:lts"
  Normal   Created    3m (x4 over 5m)  kubelet, ip-XX-XX-XXX-XXX.eu-west-1.compute.internal  Created container
  Normal   Started    3m (x4 over 5m)  kubelet, ip-XX-XX-XXX-XXX.eu-west-1.compute.internal  Started container

我也可以看到:

  State:          Running
      Started:      Wed, 23 Sep 2020 09:49:56 +0200
    Last State:     Terminated
      Reason:       Error
      Exit Code:    1
      Started:      Wed, 23 Sep 2020 09:49:06 +0200
      Finished:     Wed, 23 Sep 2020 09:49:27 +0200
    Ready:          False
    Restart Count:  3

如果我列出 pod ，它看起来像这样: Error from server (BadRequest): container "jenkins" in pod "jenkins-74cc957b47-mxvqd" is waiting to start: PodInitializing但是我看不到具体错误。有人可以帮忙吗？

Answer 1

官方文档中有一些有关Debug Running Pods的建议:

Examining pod logs:如果您的容器以前崩溃，则执行kubectl logs ${POD_NAME} ${CONTAINER_NAME}或kubectl logs --previous ${POD_NAME} ${CONTAINER_NAME}

Debugging with container exec:使用kubectl exec在特定容器内运行命令:kubectl exec ${POD_NAME} -c ${CONTAINER_NAME} -- ${CMD} ${ARG1} ${ARG2} ... ${ARGN}

Debugging with an ephemeral debug container:当kubectl exec不足，因为容器崩溃或容器镜像不包含调试实用程序时，临时容器可用于交互式故障排除。您可以找到一个示例here。

Debugging via a shell on the node:如果这些方法都不起作用，则可以找到运行Pod的主机，并通过SSH进入该主机。

您可以在链接的文档中找到更多详细信息。