How `docker` calculates the layer ids

[x-yuri]

docker-drag/docker_pull.py

Lines 118 to 119 in 5413165

	# FIXME: Creating fake layer ID. Don't know how Docker generates it
	fake_layerid = hashlib.sha256((parentid+'\n'+ublob+'\n').encode('utf-8')).hexdigest()

For each layer docker creates a v1 config, and a layer id is basically a digest of the v1 config, another layer id, and the parent layer id. If you're interested I can probably describe it more precisely. And possibly how other parts of docker save work.