Kubernetes PVC不与NFS PV绑定

Question

我使用NFS和PVC为同一个卷创建了一个物理卷。但是，PVC总是创建EBS磁盘存储，而不是绑定到PV。请参阅下面的日志：

> kubectl get pv
NAME      CAPACITY   ACCESSMODES   RECLAIMPOLICY   STATUS      CLAIM     STORAGECLASS   REASON    AGE
mynfspv   100Gi      RWX           Retain          Available                                      7s

现在就创建PVC

> kubectl get pvc
NAME       STATUS    VOLUME                                     CAPACITY   ACCESSMODES   STORAGECLASS   AGE
mynfspvc   Bound     pvc-a081c470-3f23-11e7-9d30-024e42ef6b60   100Gi      RWX           default        4s


> kubectl get pv
NAME                                       CAPACITY   ACCESSMODES   RECLAIMPOLICY   STATUS      CLAIM              STORAGECLASS   REASON    AGE
mynfspv                                    100Gi      RWX           Retain          Available                                               50s
pvc-a081c470-3f23-11e7-9d30-024e42ef6b60   100Gi      RWX           Delete          Bound       default/mynfspvc   default                  17s

nfs-pv.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  name: mynfspv
  labels:
    name: nfs2
spec:
  capacity:
    storage: 100Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  nfs:
    server: dbc56.efs.us-west-2.amazonaws.com
    path: /

nfs-pvc.yaml

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

Answer 1

看起来您已经启用了动态配置和默认存储功能，默认的类是AWS。可以使用以下命令检查默认类：

$ kubectl get storageclasses
NAME                 TYPE
standard (default)   kubernetes.io/aws-ebs

如果这是正确的，那么我认为您需要指定存储类来解决问题。

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: nfs-class
provisioner: kubernetes.io/fake-nfs

将storageClassName添加到两个PV中

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mynfspvc
spec:
  storageClassName: nfs-class
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 100Gi

和PVC

apiVersion: v1
kind: PersistentVolume
metadata:
  name: mynfspv
  labels:
    name: nfs2
spec:
  storageClassName: nfs-class
  capacity:
    storage: 100Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  nfs:
    server: dbc56.efs.us-west-2.amazonaws.com
    path: /

您可以查看https://kubernetes.io/docs/concepts/storage/persistent-volumes/#class-1获得详细信息。

Answer 2

这是什么版本的库贝？其根本原因是@ddysher所提到的。在您的设置中，“默认”存储类是"EBS“，在get pv{c}输出中可以看到。根据库贝版本，你也可以使用PVC规格中的“口径选择器”。参考# https://github.com/kubernetes/community/blob/master/contributors/design-proposals/volume-selectors.md