kubernetes报 unexpected error getting claim reference: selfLink was empty, can't make reference

啊啊 发表于: 2021-04-21   最后更新时间: 2021-04-21 14:45:30   3,056 游览

我在kubernetes中使用pv,在绑定pvc的时候,一直不成功,pvc报:

no persistent volumes available for this claim and no storage class is set

我使用的是 nfs-client-provisioner,查看其日志发现

kubectl logs -f nfs-client-provisioner-6449d655d9-hmmgb

报:

I0421 05:56:14.312000       1 controller.go:987] provision "my-space/datadir-kafka-0" class "nfs-storage": started
E0421 05:56:14.322457       1 controller.go:1004] provision "my-space/datadir-kafka-0" class "nfs-storage": unexpected error getting claim reference: selfLink was empty, can't make reference
I0421 05:56:14.331860       1 controller.go:987] provision "my-space/datadir-kafka-1" class "nfs-storage": started
E0421 05:56:14.341974       1 controller.go:1004] provision "my-space/datadir-kafka-1" class "nfs-storage": unexpected error getting claim reference: selfLink was empty, can't make reference
I0421 05:56:14.351496       1 controller.go:987] provision "my-space/datadir-kafka-2" class "nfs-storage": started
E0421 05:56:14.363755       1 controller.go:1004] provision "my-space/datadir-kafka-2" class "nfs-storage": unexpected error getting claim reference: selfLink was empty, can't make reference

kubernetes的版本:v1.20.2

我该如何解决?

发表于 2021-04-21
¥4.0

报错信息“selfLink was empty”,在官方1.20的变更说明中:

Stop propagating SelfLink (deprecated in 1.16) in kube-apiserver
selfLink在1.16版本以后已经弃用,在1.20版本停用。

而由于nfs-provisioner的实现是基于selfLink功能(同时也会影响其他用到selfLink这个功能的第三方软件),需要等nfs-provisioner的制作方重新提供新的解决方案。

目前可用的临时方案是:

修改/etc/kubernetes/manifests/kube-apiserver.yaml文件,找到如下内容后,在最后添加一项参数

spec:
  containers:
  - command:
    - kube-apiserver
    - --advertise-address=192.168.210.20
    - --.......  #省略多行内容
    - --feature-gates=RemoveSelfLink=false  #添加此行

如果是高可用的k8s集群,则需要在所有master节点上进行此操作。

添加后需要重启apiserver(静态pod默认会重启)。

三台apiserver被kubelet重启后,再次查询PVC,可以看到PVC状态都为Bound,可以正常被PV绑定了

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