Created
June 3, 2014 08:52
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Load Docker image from registry to daemon.
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#!/usr/bin/env python3 | |
import os | |
import json | |
from io import BytesIO | |
import tarfile | |
from tarfile import TarInfo | |
import docker | |
import sys | |
reg_dir = os.environ.get('DOCKER_REGISTRY_DIR', '/tmp/registry') | |
c = docker.Client(os.environ.get('DOCKER_HOST', 'unix://var/run/docker.sock')) | |
tar_io = BytesIO() | |
tar = tarfile.open(mode='w|', fileobj=tar_io) | |
os.chdir(reg_dir) | |
os.chdir('./repositories/library/{0}'.format(sys.argv[1])) | |
latest = open('./tag_latest').read() | |
repositories = TarInfo('repositories') | |
repositories_io = BytesIO() | |
repositories.size = repositories_io.write(json.dumps({"app-base": {"latest": latest}}).encode()) | |
repositories_io.seek(0) | |
tar.addfile(repositories, repositories_io) | |
os.chdir(reg_dir) | |
os.chdir('./images') | |
ids = [i['Id'] for i in c.images(all=True)] | |
os.chdir(latest) | |
ancestry = json.load(open('ancestry')) | |
os.chdir('../') | |
for image_id in ancestry: | |
if image_id not in ids: | |
tar.add(image_id) | |
tar.add('{0}/json'.format(image_id)) | |
tar.add('{0}/layer'.format(image_id), '{0}/layer.tar'.format(image_id)) | |
tar.close() | |
tar_io.seek(0) | |
c.load_image(tar_io) |
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