如何将 Kubernetes DiskPressure 状态从 true 更改为 false？

Question

创建一个简单的 nginx 部署后，我的 pod 状态显示为“PENDING”。当我运行 kubectl get pods 命令时，我得到以下信息：

NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-6b474476c4-dq26w   0/1     Pending   0          50m
nginx-deployment-6b474476c4-wjblx   0/1     Pending   0          50m

如果我检查我的节点运行状况，我会得到：

Taints:             node.kubernetes.io/disk-pressure:NoSchedule
Unschedulable:      false
Lease:
  HolderIdentity:  kubernetes-master
  AcquireTime:     <unset>
  RenewTime:       Wed, 05 Aug 2020 12:43:57 +0530
Conditions:
  Type                 Status  LastHeartbeatTime                 LastTransitionTime                Reason                       Message
  ----                 ------  -----------------                 ------------------                ------                       -------
  NetworkUnavailable   False   Wed, 05 Aug 2020 09:12:31 +0530   Wed, 05 Aug 2020 09:12:31 +0530   CalicoIsUp                   Calico is running on this node
  MemoryPressure       False   Wed, 05 Aug 2020 12:43:36 +0530   Tue, 04 Aug 2020 23:01:43 +0530   KubeletHasSufficientMemory   kubelet has sufficient memory available
  DiskPressure         True    Wed, 05 Aug 2020 12:43:36 +0530   Tue, 04 Aug 2020 23:02:06 +0530   KubeletHasDiskPressure       kubelet has disk pressure
  PIDPressure          False   Wed, 05 Aug 2020 12:43:36 +0530   Tue, 04 Aug 2020 23:01:43 +0530   KubeletHasSufficientPID      kubelet has sufficient PID available
  Ready                True    Wed, 05 Aug 2020 12:43:36 +0530   Tue, 04 Aug 2020 23:02:06 +0530   KubeletReady                 kubelet is posting ready status. AppArmor enabled

Answer 1

您可以使用以下命令删除磁盘压力的污染，但理想情况下，您需要调查 kubelet 报告磁盘压力的原因。节点可能磁盘空间不足。

kubectl taint nodes <nodename> node.kubernetes.io/disk-pressure-

这将使您摆脱 nginx pod 的挂起状态。