curve提供命令行管理工具curve，用来创建、删除卷等管理操作。具体接口如下：

    • 创建卷：
    • 删除卷：curve delete [-h] --user USER --filename FILENAME
    • 扩容卷：curve extend [-h] --user USER --filename FILENAME --length LENGTH
    • 查询卷：curve stat [-h] --user USER --filename FILENAME
    • rename卷：curve rename [-h] --user USER --filename FILENAME --newname NEWNAME
    • 创建目录：curve mkdir [-h] --user USER --dirname DIRNAME
    • 删除目录：curve rmdir [-h] --user USER --dirname DIRNAME
    • 查询目录下所有文件：curve list [-h] --user USER --dirname DIRNAME

    Implementing with Kubernetes CSI

    CSI spec:

    1.    CreateVolume +------------+ DeleteVolume
    2.  +------------->|  CREATED   +--------------+
    4.  |       Controller |    | Controller       v
    5. +++         Publish |    | Unpublish       +++
    6. |X|          Volume |    | Volume          | |
    7. +-+             +---v----+---+             +-+
    8.                 | NODE_READY |
    9.                Node |    | Node
    10.               Stage |    | Unstage
    11.              Volume |    | Volume
    13.                 |  VOL_READY |
    14.                 +---+----^---+
    15.                Node |    | Node
    16.             Publish |    | Unpublish
    17.              Volume |    | Volume
    18.                 +---v----+---+
    19.                 | PUBLISHED  |
    20.                 +------------+
    • CreateVolume:
      • curve mkdir: DIRNAME在k8s storageClass定义
      • curve create: FILENAME为
      • curve stat: 等待卷ready
    • Controller Publish Volume:
    • Node Stage Volume:
      • curve-nbd list-mapped: 查看是否已经被挂载
      • curve-nbd map: 挂载
    • Node Publish Volume:
      • mount the stagePath to the publishPath
    • Node Unpublish Volume:
      • umount publishPath
    • Node Unstage Volume:
      • curve-nbd list-mapped: 查看是否已经被卸载
      • curve-nbd unmap: 卸载
    • Controller Unpublish Volume:
      • Nothing to do
    • DeleteVolume:
      • curve delete

    其他可选支持：

      • ControllerExpandVolume: curve extend
      • NodeExpandVolume: resize2fs/xfs_growfs