X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/a7f12322bab34a27863d90de9ddb95f69697bf29..2a96c097e5a176018d078a5d6985403072e8672e:/sdk/python/arvados/commands/keepdocker.py diff --git a/sdk/python/arvados/commands/keepdocker.py b/sdk/python/arvados/commands/keepdocker.py index c091374710..e48a6d1547 100644 --- a/sdk/python/arvados/commands/keepdocker.py +++ b/sdk/python/arvados/commands/keepdocker.py @@ -1,6 +1,7 @@ #!/usr/bin/env python import argparse +import collections import datetime import errno import json @@ -9,18 +10,22 @@ import subprocess import sys import tarfile import tempfile +import _strptime -from collections import namedtuple +from operator import itemgetter from stat import * import arvados +import arvados.util import arvados.commands._util as arv_cmd import arvados.commands.put as arv_put +import ciso8601 +EARLIEST_DATETIME = datetime.datetime(datetime.MINYEAR, 1, 1, 0, 0, 0) STAT_CACHE_ERRORS = (IOError, OSError, ValueError) -DockerImage = namedtuple('DockerImage', - ['repo', 'tag', 'hash', 'created', 'vsize']) +DockerImage = collections.namedtuple( + 'DockerImage', ['repo', 'tag', 'hash', 'created', 'vsize']) keepdocker_parser = argparse.ArgumentParser(add_help=False) keepdocker_parser.add_argument( @@ -116,7 +121,8 @@ def stat_cache_name(image_file): return getattr(image_file, 'name', image_file) + '.stat' def pull_image(image_name, image_tag): - check_docker(popen_docker(['pull', '-t', image_tag, image_name]), "pull") + check_docker(popen_docker(['pull', '{}:{}'.format(image_name, image_tag)]), + "pull") def save_image(image_hash, image_file): # Save the specified Docker image to image_file, then try to save its @@ -157,52 +163,135 @@ def make_link(api_client, num_retries, link_class, link_name, **link_attrs): return api_client.links().create(body=link_attrs).execute( num_retries=num_retries) -def ptimestamp(t): - s = t.split(".") - if len(s) == 2: - t = s[0] + s[1][-1:] - return datetime.datetime.strptime(t, "%Y-%m-%dT%H:%M:%SZ") - -def list_images_in_arv(api_client, num_retries): - existing_links = api_client.links().list( - filters=[['link_class', 'in', ['docker_image_hash', 'docker_image_repo+tag']]] - ).execute(num_retries=num_retries)['items'] - images = {} - for link in existing_links: - collection_uuid = link["head_uuid"] - if collection_uuid not in images: - images[collection_uuid]= {"dockerhash": "", - "repo":"", - "tag":"", - "timestamp": ptimestamp("1970-01-01T00:00:01Z")} - - if link["link_class"] == "docker_image_hash": - images[collection_uuid]["dockerhash"] = link["name"] - - if link["link_class"] == "docker_image_repo+tag": - r = link["name"].split(":") - images[collection_uuid]["repo"] = r[0] - if len(r) > 1: - images[collection_uuid]["tag"] = r[1] - - if "image_timestamp" in link["properties"]: - images[collection_uuid]["timestamp"] = ptimestamp(link["properties"]["image_timestamp"]) - else: - images[collection_uuid]["timestamp"] = ptimestamp(link["created_at"]) - - st = sorted(images.items(), lambda a, b: cmp(b[1]["timestamp"], a[1]["timestamp"])) +def docker_link_sort_key(link): + """Build a sort key to find the latest available Docker image. - fmt = "{:30} {:10} {:12} {:29} {:20}" - print fmt.format("REPOSITORY", "TAG", "IMAGE ID", "COLLECTION", "CREATED") - for i, j in st: - print(fmt.format(j["repo"], j["tag"], j["dockerhash"][0:12], i, j["timestamp"].strftime("%c"))) + To find one source collection for a Docker image referenced by + name or image id, the API server looks for a link with the most + recent `image_timestamp` property; then the most recent + `created_at` timestamp. This method generates a sort key for + Docker metadata links to sort them from least to most preferred. + """ + try: + image_timestamp = ciso8601.parse_datetime_unaware( + link['properties']['image_timestamp']) + except (KeyError, ValueError): + image_timestamp = EARLIEST_DATETIME + return (image_timestamp, + ciso8601.parse_datetime_unaware(link['created_at'])) + +def _get_docker_links(api_client, num_retries, **kwargs): + links = arvados.util.list_all(api_client.links().list, + num_retries, **kwargs) + for link in links: + link['_sort_key'] = docker_link_sort_key(link) + links.sort(key=itemgetter('_sort_key'), reverse=True) + return links + +def _new_image_listing(link, dockerhash, repo='', tag=''): + timestamp_index = 1 if (link['_sort_key'][0] is EARLIEST_DATETIME) else 0 + return { + '_sort_key': link['_sort_key'], + 'timestamp': link['_sort_key'][timestamp_index], + 'collection': link['head_uuid'], + 'dockerhash': dockerhash, + 'repo': repo, + 'tag': tag, + } + +def list_images_in_arv(api_client, num_retries, image_name=None, image_tag=None): + """List all Docker images known to the api_client with image_name and + image_tag. If no image_name is given, defaults to listing all + Docker images. + + Returns a list of tuples representing matching Docker images, + sorted in preference order (i.e. the first collection in the list + is the one that the API server would use). Each tuple is a + (collection_uuid, collection_info) pair, where collection_info is + a dict with fields "dockerhash", "repo", "tag", and "timestamp". + + """ + search_filters = [] + repo_links = None + hash_links = None + if image_name: + # Find images with the name the user specified. + search_links = _get_docker_links( + api_client, num_retries, + filters=[['link_class', '=', 'docker_image_repo+tag'], + ['name', '=', + '{}:{}'.format(image_name, image_tag or 'latest')]]) + if search_links: + repo_links = search_links + else: + # Fall back to finding images with the specified image hash. + search_links = _get_docker_links( + api_client, num_retries, + filters=[['link_class', '=', 'docker_image_hash'], + ['name', 'ilike', image_name + '%']]) + hash_links = search_links + # Only list information about images that were found in the search. + search_filters.append(['head_uuid', 'in', + [link['head_uuid'] for link in search_links]]) + + # It should be reasonable to expect that each collection only has one + # image hash (though there may be many links specifying this). Find + # the API server's most preferred image hash link for each collection. + if hash_links is None: + hash_links = _get_docker_links( + api_client, num_retries, + filters=search_filters + [['link_class', '=', 'docker_image_hash']]) + hash_link_map = {link['head_uuid']: link for link in reversed(hash_links)} + + # Each collection may have more than one name (though again, one name + # may be specified more than once). Build an image listing from name + # tags, sorted by API server preference. + if repo_links is None: + repo_links = _get_docker_links( + api_client, num_retries, + filters=search_filters + [['link_class', '=', + 'docker_image_repo+tag']]) + seen_image_names = collections.defaultdict(set) + images = [] + for link in repo_links: + collection_uuid = link['head_uuid'] + if link['name'] in seen_image_names[collection_uuid]: + continue + seen_image_names[collection_uuid].add(link['name']) + try: + dockerhash = hash_link_map[collection_uuid]['name'] + except KeyError: + dockerhash = '' + name_parts = link['name'].split(':', 1) + images.append(_new_image_listing(link, dockerhash, *name_parts)) + + # Find any image hash links that did not have a corresponding name link, + # and add image listings for them, retaining the API server preference + # sorting. + images_start_size = len(images) + for collection_uuid, link in hash_link_map.iteritems(): + if not seen_image_names[collection_uuid]: + images.append(_new_image_listing(link, link['name'])) + if len(images) > images_start_size: + images.sort(key=itemgetter('_sort_key'), reverse=True) + + # Remove any image listings that refer to unknown collections. + existing_coll_uuids = {coll['uuid'] for coll in arvados.util.list_all( + api_client.collections().list, num_retries, + filters=[['uuid', 'in', [im['collection'] for im in images]]], + select=['uuid'])} + return [(image['collection'], image) for image in images + if image['collection'] in existing_coll_uuids] def main(arguments=None): args = arg_parser.parse_args(arguments) api = arvados.api('v1') if args.image is None or args.image == 'images': - list_images_in_arv(api, args.retries) + fmt = "{:30} {:10} {:12} {:29} {:20}" + print fmt.format("REPOSITORY", "TAG", "IMAGE ID", "COLLECTION", "CREATED") + for i, j in list_images_in_arv(api, args.retries): + print(fmt.format(j["repo"], j["tag"], j["dockerhash"][0:12], i, j["timestamp"].strftime("%c"))) sys.exit(0) # Pull the image if requested, unless the image is specified as a hash