当尝试在Kubernetes（EKS）上安装Jupyterhub时​​，Hub窗格中出现以下错误。这是describe pod的输出。报告了类似的问题，我尝试了解决方案，但是没有用。

Warning  FailedScheduling  52s (x2 over 52s)  default-scheduler  0/3 nodes are available: 1 Insufficient cpu,2 node(s) had no available volume zone.

这是我的pvc.yaml

kind: Storageclass
apiVersion: storage.k8s.io/v1
metadata:
  name: standard
  annotations:
    volume.alpha.kubernetes.io/storage-class: default
provisioner: kubernetes.io/aws-ebs
parameters:
  type: gp2  
allowedTopologies:
- matchLabelExpressions:
  - key: failure-domain.beta.kubernetes.io/zone
    values:
    - us-east-1a
    - us-east-1b
    - us-east-1c    

来源：jupyterhub / templates / hub / pvc.yaml

kind: PersistentVolumeclaim
apiVersion: v1
metadata:
  name: hub-db-dir
  annotations:
    volume.alpha.kubernetes.io/storage-class: default
spec:
  accessModes:
    - ReadWriteonce
  resources:
    requests:
      storage: 1Gi
  storageclassname: standard

请让我知道我是否在这里丢失了一些东西。