#!/usr/bin/env python
import argparse
+import collections
import datetime
import errno
import json
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(
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
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": "<none>",
- "repo":"<none>",
- "tag":"<none>",
- "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='<none>', tag='<none>'):
+ 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 = '<unknown>'
+ 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
projects / arvados.git / blobdiff