k8s创建pvc时报错unexpected error getting claim reference: selfLink was empty, can‘t make referece

用helm安装nfs后，创建了默认的storageClass,

[root@k8s-master ~]# kubectl get sc
NAME         PROVISIonER                                RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
nfs-client   cluster.local/nfs-nfs-client-provisioner   Delete          Immediate           true                   24m

然后资源清单链接这个nfs-client 创建pvc时候，总是提示pending状态

[root@k8s-master ~]# cat sccc.yaml 
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: test-sc2
spec:
  storageClassName: nfs-client
  accessModes:
    - "ReadWriteMany"
  resources:
    requests:
      storage: 2Gi

[root@k8s-master ~]# kubectl get pvc
NAME       STATUS    VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
test-sc1   Pending                                      nfs-client     6s

然后查看pod日志提示： unexpected error getting claim reference: selflink was empty, can’t make reference

[root@k8s-master ~]# kubectl logs nfs-nfs-client-provisioner-f8f4cdb44-lmjlz 

I0103 04:36:15.578403       1 controller.go:987] provision "default/test-sc2" class "nfs-client": started
E0103 04:36:15.583315       1 controller.go:1004] provision "default/test-sc2" class "nfs-client": unexpected error getting claim reference: selflink was empty, can't make reference

找资料发现，kubernetes 1.20版本 禁用了 selflink。

解决方法：

编辑/etc/kubernetes/manifests/kube-apiserver.yaml在这里：

spec:
  containers:
  - command:
    - kube-apiserver

添加这一行：

- --feature-gates=RemoveSelflink=false

然后应用它，即可

kubectl apply -f /etc/kubernetes/manifests/kube-apiserver.yaml