4.6.3. Installing FlexVolume drivers

Prerequisites

• FlexVolume drivers must implement these operations:

  init

  Initializes the driver. It is called during initialization of all nodes.

  • Arguments: none
  • Executed on: node
  • Expected output: default JSON

  mount

  Mounts a volume to directory. This can include anything that is necessary to mount the volume, including finding the device and then mounting the device.

  • Arguments: <mount-dir> <json>
  • Executed on: node
  • Expected output: default JSON

  unmount

  Unmounts a volume from a directory. This can include anything that is necessary to clean up the volume after unmounting.

  • Arguments: <mount-dir>
  • Executed on: node
  • Expected output: default JSON

  mountdevice

  Mounts a volume’s device to a directory where individual pods can then bind mount.

• Arguments: <mount-dir> <json>
• Executed on: node

• Expected output: default JSON

  unmountdevice

  Unmounts a volume’s device from a directory.

• Arguments: <mount-dir>
• Executed on: node

• Expected output: default JSON

  • All other operations should return JSON with {"status": "Not supported"} and exit code 1.