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Task #6900

Updated by Nico Schottelius over 2 years ago

h2. Objective 

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

 h2. 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 


 h2. 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 

 h3. 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 

 h3. 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 

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