ODF 部署完成后，默认会创键以下存储类：

oc get sc -o name
storageclass.storage.k8s.io/imxcai-lvmset
storageclass.storage.k8s.io/ocs-storagecluster-ceph-rbd
storageclass.storage.k8s.io/ocs-storagecluster-ceph-rgw
storageclass.storage.k8s.io/ocs-storagecluster-cephfs
storageclass.storage.k8s.io/openshift-storage.noobaa.io

如果默认的存储类不能满足需求，可以创建自定义存储类。

根据现有的存储类进行修改

默认的 openshift-storage.rbd.csi.ceph.com 存储类的资源定义：

allowVolumeExpansion: true
kind: StorageClass
apiVersion: storage.k8s.io/v12
metadata:
  name: ocs-storagecluster-ceph-rbd
parameters:
  clusterID: openshift-storage
  csi.storage.k8s.io/controller-expand-secret-name: rook-csi-rbd-provisioner
  csi.storage.k8s.io/controller-expand-secret-namespace: openshift-storage
  csi.storage.k8s.io/fstype: ext4
  csi.storage.k8s.io/node-stage-secret-name: rook-csi-rbd-node
  csi.storage.k8s.io/node-stage-secret-namespace: openshift-storage
  csi.storage.k8s.io/provisioner-secret-name: rook-csi-rbd-provisioner
  csi.storage.k8s.io/provisioner-secret-namespace: openshift-storage
  imageFeatures: layering
  imageFormat: "2"
  pool: ocs-storagecluster-cephblockpool
provisioner: openshift-storage.rbd.csi.ceph.com
reclaimPolicy: Delete
volumeBindingMode: Immediate

默认的为 ext4 文件系统，回收策略是 Delete，可以修改为使用 xfs 文件系统和 Retain 策略：

allowVolumeExpansion: true
kind: StorageClass
apiVersion: storage.k8s.io/v12
​metadata:
  name: ocs-storagecluster-ceph-rbd
​parameters:
  clusterID: openshift-storage
  csi.storage.k8s.io/controller-expand-secret-name: rook-csi-rbd-provisioner
  csi.storage.k8s.io/controller-expand-secret-namespace: openshift-storage
  csi.storage.k8s.io/fstype: xfs
  csi.storage.k8s.io/node-stage-secret-name: rook-csi-rbd-node
  csi.storage.k8s.io/node-stage-secret-namespace: openshift-storage
  csi.storage.k8s.io/provisioner-secret-name: rook-csi-rbd-provisioner
  csi.storage.k8s.io/provisioner-secret-namespace: openshift-storage
  imageFeatures: layering
  imageFormat: "2"
  pool: ocs-storagecluster-cephblockpool
provisioner: openshift-storage.rbd.csi.ceph.com
reclaimPolicy: Retain
volumeBindingMode: Immediate

使用 Dashboard 创建自定义存储类

如果要更改池，首先需要创建池，这个步骤在 Dashboard 中操作会更方便：

在 CLI 中验证：

oc get sc                                                                                                                       
NAME                          PROVISIONER                                   RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE            
app-database-sc               openshift-storage.rbd.csi.ceph.com            Retain          Immediate              false                  14s            
imxcai-lvmset                 kubernetes.io/no-provisioner                  Delete          WaitForFirstConsumer   false                  5d19h          
ocs-storagecluster-ceph-rbd   openshift-storage.rbd.csi.ceph.com            Delete          Immediate              true                   5d19h          
ocs-storagecluster-ceph-rgw   openshift-storage.ceph.rook.io/bucket         Delete          Immediate              false                  5d19h          
ocs-storagecluster-cephfs     openshift-storage.cephfs.csi.ceph.com         Delete          Immediate              true                   5d19h          
openshift-storage.noobaa.io   openshift-storage.noobaa.io/obc               Delete          Immediate              false                  5d19h


oc describe sc app-database-sc
Name:                  app-database-sc
IsDefaultClass:        No
Annotations:           <none>
Provisioner:           openshift-storage.rbd.csi.ceph.com
Parameters:            clusterID=openshift-storage,csi.storage.k8s.io/controller-expand-secret-name=rook-csi-rbd-provisioner,csi.storage.k8s.io/controller-expand-secret-namespace=openshift-storage,csi.storage.k8s.io/fstype=ext4,csi.storage.k8s.io/node-stage-secret-name=rook-csi-rbd-node,csi.storage.k8s.io/node-stage-secret-namespace=openshift-storage,csi.storage.k8s.io/provisioner-secret-name=rook-csi-rbd-provisioner,csi.storage.k8s.io/provisioner-secret-namespace=openshift-storage,imageFeatures=layering,imageFormat=2,pool=sc-pool
AllowVolumeExpansion:  False
MountOptions:          <none>
ReclaimPolicy:         Retain
VolumeBindingMode:     Immediate
Events:                <none>