Migrating from fedimg to ore

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Last few days, I spent doing a feasibility analysis on the migrating
from fedimg to ore, a subproject of mantle to release the Fedora cloud
images.

ore/mantle comes from the CoreOS community. mantle is comprised of
multiple utility projects to keep the CL bits together.

The workflow for fedimg right now:
- Downloads the raw.xz image
- Uses the ImportVolume AWS API[1] to create a volume via S3
- Creates the snapshot using the earlier created volume
- Registers the AMI of the snapshot provided
- Copies the AMI to other regions and makes the AMI and the snapshot public.

What if we migrate to Ore?
The process remain more or less the same except for a few changes:
- Downloads the .qcow2 image
   * Once we start using the .qcow2 image we don't need releng to
produce two formats i.e. qcow2 & .raw.xz
- Converts the .qcow2 image to .vmdk format image using qemu-img
- Uses the newer supported AWS API i.e. ImportSnapshot which directly
creates the Snapshot uploading the image via S3
- Registers the AMI with the snapshot.
- Copies the AMI to other regions.

- Ore also skips any of the steps already processed which makes it
easier for the AMIs maintainer.
- Ore has a more maintainers than fedimg.
- It's better to focus on a single project than maintaining two.

Two areas where it needs more research

- how do we send out the fedmsg messages when we move to ore
- making the images & the snapshots public.

Thoughts?

-- 
Sayan Chowdhury <https://sayanchowdhury.dgplug.org/>
Senior Software Engineer, Fedora Engineering - Emerging Platform
GPG Fingerprint : 0F16 E841 E517 225C 7D13  AB3C B023 9931 9CD0 5C8B


Proud to work at The Open Organization!
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