如何使用AWS EFS和ReadWriteMany配置持久卷声明？

Question

我有以下持久量和音量声明:

kind: PersistentVolume
apiVersion: v1
metadata:
  name: kloud
spec:
  capacity:
    storage: 100Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  nfs:
    server: 172.21.51.42
    path: /
    readOnly: false

和:

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: kloud
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 100Gi

nfs服务器是AWS EFS.我特意ssh到k8s master并检查我可以手动挂载NFS卷.但是,当我使用kubectl创建卷和声明时,它会无限期挂起,等待:

$ kubectl get pvc
NAME      STATUS    VOLUME    CAPACITY   ACCESSMODES   STORAGECLASS   AGE
kloud     Pending                                      gp2            8s

如果我将模式更改为ReadWriteOnce,它将按预期工作,不会挂起.

$ kubectl get pvc
NAME      STATUS    VOLUME                                     CAPACITY   ACCESSMODES   STORAGECLASS   AGE
kloud     Bound     pvc-c9a01bff-94d0-11e7-8ed4-0aec4a0f734a   100Gi      RWO           gp2       

有什么我想念的吗？如何使用k8s和EFS创建RWX声明？

Answer 1

您需要在群集中设置EFS配置程序.默认的Kubernetes发行版仍然不支持挂载EFS,因此您需要此扩展名:https://github.com/kubernetes-incubator/external-storage/tree/master/aws/efs

您需要设置它的存储类:

    kind: StorageClass
apiVersion: storage.k8s.io/v1beta1
metadata:
  name: aws-efs
provisioner: example.com/aws-efs

然后写PVC的类型:

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: efs
  annotations:
    volume.beta.kubernetes.io/storage-class: "aws-efs"
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 1Mi

不要介意存储大小,虽然EFS没有使用它,但Kubernetes要求你设置一些东西才能使用它.