k8s 报错： node(s) didn't match Pod's node affinity.

前言

k8s集群中，有pod出现了 Affinity ，使用 kubectl describe pod 命令，发现了报错 2 node(s) didn't match Pod's node affinity.

 Warning  FailedScheduling  <unknown>  default-scheduler  0/2 nodes are available: 1 node(s) didn't match node selector, 1 node(s) had taints that the pod didn't tolerate.

这是因为节点被打上了污点，导致了pod没有节点可以起来

解决

kubectl get nodes -o json | jq '.items[].spec'

or

kubectl get nodes -o yaml

找到污点相关信息，例如：

{
 "taints": [
   {
     "effect": "NoSchedule",
     "key": "node.kubernetes.io/disk-pressure",
     "timeAdded": "2021-03-06T14:15:27Z"
   }
 ]
}

可以看到，节点被打上了污点，并且是 NoSchedule ，不可调度

进行如下操作，取消所有节点的 node.kubernetes.io/disk-pressure 这个名称的污点

kubectl taint nodes --all node.kubernetes.io/disk-pressure-

成功解决！！