Glance-new-download-workflow

This is the full specification for blueprint:https://blueprints.launchpad.net/glance/+spec/new-download-workflow

Motivation

Here's why we want an alternative to the "normal" Glance download workflow:

• want to allow a cloud provider the opportunity to "scrub" or otherwise process an image that's going to be pulled out of that provider's cloud
  • they don't have to, but want to make the option available
• want to push all efforts associated with getting images out of the cloud to the cloud periphery so the bandwidth/compute required doesn't affect normal cloud functionality

We propose calling this functionality "export" (to keep symmetry with the proposed new "import" functionality )

Example Workflow (API View)

Initial Export Request

Request 1: POST /v2/images//export
{ "some-stuff" : "whatever" }

Response 1: 201 created
Location: "http://glance-server/v2/image-exports/12345678-1234-1234-1234-123456789abc"

Request 2 - N: GET /v2/image-exports/12345678-1234-1234-1234-123456789abc

Response 2 - N-1: 200 OK
{ "status" : "waiting", "image_uuid" : }

Response N: