Kubernetes v1.20 NFS provisioner unexpected error getting claim reference: selfLink was empty, can't make reference

refer to

---

• https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner/issues/25
• https://stackoverflow.com/questions/65376314/kubernetes-nfs-provider-selflink-was-empty

v1.20 에서는 kube-apiserver feature gate 인 SelfLinks가 disable 되었음
조치하려면 아래와 같이 kube-apiserver command에 option을 추가해야 함

적용

---

이후 재기동 필요 없이 자동으로 apiserver가 재시작됨

[root@master01 nfs_provisioner]# vim /etc/kubernetes/manifests/kube-apiserver.yaml 

spec:
  containers:
  - command:
...
- --feature-gates=RemoveSelfLink=false