Open Infrastructure

Nico Schottelius wrote:

Objective¶

Users can upload files. Files can be used as images for VMs, if they are in the qcow2 format.

How it works¶

• Files are uploaded to a specific VM (likely files.datacenterlight.ch)
• Users can use the ucloud-cli to convert a file to an image

CLI¶

• ucloud image-create-from-file --uuid $UUID --name <name-of-the-image> --image-store <name> [--desc "optional description"] [--public]
  • if --public is passed, the image is public
  • do not implement --public before v2
  • for --public we need to clarify how is paying for the storage
  • Need to specify the name of the image store; OR we use the UUID (persisten!) of the image store
• ucloud image-set-permission [--public|--private]
  • makes image public or private
  • do not implement before v2

API¶

The API modifies entries in etcd as follows:

• Finds the file in etcd
  • if it does not exist -> error out
  • Only accept "sane" filenames (i.e. no .. and funky stuff)
• Creates an image entry below /v1/image/$UUID
  • maybe the same UUID as the file OR a random UUID - to be discussed in ucloud channel
  • JSON: set status on create to "TO_BE_CREATED", needs to include "owner" field

Cron job on files.datacenterlight.ch¶

• Scans all entries in /v1/image
• If there is a json with TO_BE_CREATED
  • Look for the filename below basepath/$owner/$filename
  • If it is not there, error out
• If image is found
  • Verify that it is qcow2 format (file or qemu-img)
  • Convert it to raw and import it into ceph
    • qemu-img convert ... | rbd import ...

-> ping @llnu for a test ceph cluster to try this out

Instead of image-create-from-file sub-command, the sub-command would be create-image-from-file