I setup a Kubernetes cluster with four EC2 instances using kubeadm. The Kubernetes cluster works fine, but failed when I try to create a PersistentVolumeClaim.

First I created a StorageClass with following YAML which works fine.

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: generic
  annotations:
    storageclass.kubernetes.io/is-default-class: "true"
provisioner: kubernetes.io/aws-ebs
parameters:
  type: gp2
  encrypted: "false"

Then I try to create a PersistentVolumeClaim with the following YAML:

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: slow
  labels:
    app: nginx
spec:
  storageClassName: generic
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 3Gi

Which got an error message of:

Failed to provision volume with StorageClass "generic": Failed to get AWS Cloud Provider. GetCloudProvider returned <nil> instead

By the way, it seems no PersistentVolume was ever created.

kubectl get pv
No resources found.

Any ideas how to solve this?

Thanks.