Module arvados.commands.keepdocker
Expand source code
# Copyright (C) The Arvados Authors. All rights reserved.
#
# SPDX-License-Identifier: Apache-2.0
from builtins import next
import argparse
import collections
import datetime
import errno
import json
import os
import re
import sys
import tarfile
import tempfile
import shutil
import _strptime
import fcntl
from operator import itemgetter
from stat import *
if os.name == "posix" and sys.version_info[0] < 3:
import subprocess32 as subprocess
else:
import subprocess
import arvados
import arvados.util
import arvados.commands._util as arv_cmd
import arvados.commands.put as arv_put
from arvados.collection import CollectionReader
import ciso8601
import logging
import arvados.config
from arvados._version import __version__
logger = logging.getLogger('arvados.keepdocker')
logger.setLevel(logging.DEBUG if arvados.config.get('ARVADOS_DEBUG')
else logging.INFO)
EARLIEST_DATETIME = datetime.datetime(datetime.MINYEAR, 1, 1, 0, 0, 0)
STAT_CACHE_ERRORS = (IOError, OSError, ValueError)
DockerImage = collections.namedtuple(
'DockerImage', ['repo', 'tag', 'hash', 'created', 'vsize'])
keepdocker_parser = argparse.ArgumentParser(add_help=False)
keepdocker_parser.add_argument(
'--version', action='version', version="%s %s" % (sys.argv[0], __version__),
help='Print version and exit.')
keepdocker_parser.add_argument(
'-f', '--force', action='store_true', default=False,
help="Re-upload the image even if it already exists on the server")
keepdocker_parser.add_argument(
'--force-image-format', action='store_true', default=False,
help="Proceed even if the image format is not supported by the server")
_group = keepdocker_parser.add_mutually_exclusive_group()
_group.add_argument(
'--pull', action='store_true', default=False,
help="Try to pull the latest image from Docker registry")
_group.add_argument(
'--no-pull', action='store_false', dest='pull',
help="Use locally installed image only, don't pull image from Docker registry (default)")
# Combine keepdocker options listed above with run_opts options of arv-put.
# The options inherited from arv-put include --name, --project-uuid,
# --progress/--no-progress/--batch-progress and --resume/--no-resume.
arg_parser = argparse.ArgumentParser(
description="Upload or list Docker images in Arvados",
parents=[keepdocker_parser, arv_put.run_opts, arv_cmd.retry_opt])
arg_parser.add_argument(
'image', nargs='?',
help="Docker image to upload: repo, repo:tag, or hash")
arg_parser.add_argument(
'tag', nargs='?',
help="Tag of the Docker image to upload (default 'latest'), if image is given as an untagged repo name")
class DockerError(Exception):
pass
def popen_docker(cmd, *args, **kwargs):
manage_stdin = ('stdin' not in kwargs)
kwargs.setdefault('stdin', subprocess.PIPE)
kwargs.setdefault('stdout', subprocess.PIPE)
kwargs.setdefault('stderr', subprocess.PIPE)
try:
docker_proc = subprocess.Popen(['docker'] + cmd, *args, **kwargs)
except OSError: # No docker in $PATH, try docker.io
docker_proc = subprocess.Popen(['docker.io'] + cmd, *args, **kwargs)
if manage_stdin:
docker_proc.stdin.close()
return docker_proc
def check_docker(proc, description):
proc.wait()
if proc.returncode != 0:
raise DockerError("docker {} returned status code {}".
format(description, proc.returncode))
def docker_image_format(image_hash):
"""Return the registry format ('v1' or 'v2') of the given image."""
cmd = popen_docker(['inspect', '--format={{.Id}}', image_hash],
stdout=subprocess.PIPE)
try:
image_id = next(cmd.stdout).decode('utf-8').strip()
if image_id.startswith('sha256:'):
return 'v2'
elif ':' not in image_id:
return 'v1'
else:
return 'unknown'
finally:
check_docker(cmd, "inspect")
def docker_image_compatible(api, image_hash):
supported = api._rootDesc.get('dockerImageFormats', [])
if not supported:
logger.warning("server does not specify supported image formats (see docker_image_formats in server config).")
return False
fmt = docker_image_format(image_hash)
if fmt in supported:
return True
else:
logger.error("image format is {!r} " \
"but server supports only {!r}".format(fmt, supported))
return False
def docker_images():
# Yield a DockerImage tuple for each installed image.
list_proc = popen_docker(['images', '--no-trunc'], stdout=subprocess.PIPE)
list_output = iter(list_proc.stdout)
next(list_output) # Ignore the header line
for line in list_output:
words = line.split()
words = [word.decode('utf-8') for word in words]
size_index = len(words) - 2
repo, tag, imageid = words[:3]
ctime = ' '.join(words[3:size_index])
vsize = ' '.join(words[size_index:])
yield DockerImage(repo, tag, imageid, ctime, vsize)
list_proc.stdout.close()
check_docker(list_proc, "images")
def find_image_hashes(image_search, image_tag=None):
# Query for a Docker images with the repository and tag and return
# the image ids in a list. Returns empty list if no match is
# found.
list_proc = popen_docker(['inspect', "%s%s" % (image_search, ":"+image_tag if image_tag else "")], stdout=subprocess.PIPE)
inspect = list_proc.stdout.read()
list_proc.stdout.close()
imageinfo = json.loads(inspect)
return [i["Id"] for i in imageinfo]
def find_one_image_hash(image_search, image_tag=None):
hashes = find_image_hashes(image_search, image_tag)
hash_count = len(hashes)
if hash_count == 1:
return hashes.pop()
elif hash_count == 0:
raise DockerError("no matching image found")
else:
raise DockerError("{} images match {}".format(hash_count, image_search))
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', '{}:{}'.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
# stats so we can try to resume after interruption.
check_docker(popen_docker(['save', image_hash], stdout=image_file),
"save")
image_file.flush()
try:
with open(stat_cache_name(image_file), 'w') as statfile:
json.dump(tuple(os.fstat(image_file.fileno())), statfile)
except STAT_CACHE_ERRORS:
pass # We won't resume from this cache. No big deal.
def get_cache_dir():
return arv_cmd.make_home_conf_dir(
os.path.join('.cache', 'arvados', 'docker'), 0o700)
def prep_image_file(filename):
# Return a file object ready to save a Docker image,
# and a boolean indicating whether or not we need to actually save the
# image (False if a cached save is available).
cache_dir = get_cache_dir()
if cache_dir is None:
image_file = tempfile.NamedTemporaryFile(suffix='.tar')
need_save = True
else:
file_path = os.path.join(cache_dir, filename)
try:
with open(stat_cache_name(file_path)) as statfile:
prev_stat = json.load(statfile)
now_stat = os.stat(file_path)
need_save = any(prev_stat[field] != now_stat[field]
for field in [ST_MTIME, ST_SIZE])
except STAT_CACHE_ERRORS + (AttributeError, IndexError):
need_save = True # We couldn't compare against old stats
image_file = open(file_path, 'w+b' if need_save else 'rb')
return image_file, need_save
def make_link(api_client, num_retries, link_class, link_name, **link_attrs):
link_attrs.update({'link_class': link_class, 'name': link_name})
return api_client.links().create(body=link_attrs).execute(
num_retries=num_retries)
def docker_link_sort_key(link):
"""Build a sort key to find the latest available Docker image.
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_as_naive(
link['properties']['image_timestamp'])
except (KeyError, ValueError):
image_timestamp = EARLIEST_DATETIME
try:
created_timestamp = ciso8601.parse_datetime_as_naive(link['created_at'])
except ValueError:
created_timestamp = None
return (image_timestamp, created_timestamp)
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, project_uuid=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
project_filter = []
if project_uuid is not None:
project_filter = [["owner_uuid", "=", project_uuid]]
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')]]+project_filter)
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 + '%']]+project_filter)
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']]+project_filter)
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']]+project_filter)
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.items():
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]]]+project_filter,
select=['uuid'])}
return [(image['collection'], image) for image in images
if image['collection'] in existing_coll_uuids]
def items_owned_by(owner_uuid, arv_items):
return (item for item in arv_items if item['owner_uuid'] == owner_uuid)
def _uuid2pdh(api, uuid):
return api.collections().list(
filters=[['uuid', '=', uuid]],
select=['portable_data_hash'],
).execute()['items'][0]['portable_data_hash']
def main(arguments=None, stdout=sys.stdout, install_sig_handlers=True, api=None):
args = arg_parser.parse_args(arguments)
if api is None:
api = arvados.api('v1')
if args.image is None or args.image == 'images':
fmt = "{:30} {:10} {:12} {:29} {:20}\n"
stdout.write(fmt.format("REPOSITORY", "TAG", "IMAGE ID", "COLLECTION", "CREATED"))
try:
for i, j in list_images_in_arv(api, args.retries):
stdout.write(fmt.format(j["repo"], j["tag"], j["dockerhash"][0:12], i, j["timestamp"].strftime("%c")))
except IOError as e:
if e.errno == errno.EPIPE:
pass
else:
raise
sys.exit(0)
if re.search(r':\w[-.\w]{0,127}$', args.image):
# image ends with :valid-tag
if args.tag is not None:
logger.error(
"image %r already includes a tag, cannot add tag argument %r",
args.image, args.tag)
sys.exit(1)
# rsplit() accommodates "myrepo.example:8888/repo/image:tag"
args.image, args.tag = args.image.rsplit(':', 1)
elif args.tag is None:
args.tag = 'latest'
# Pull the image if requested, unless the image is specified as a hash
# that we already have.
if args.pull and not find_image_hashes(args.image):
pull_image(args.image, args.tag)
images_in_arv = list_images_in_arv(api, args.retries, args.image, args.tag)
image_hash = None
try:
image_hash = find_one_image_hash(args.image, args.tag)
if not docker_image_compatible(api, image_hash):
if args.force_image_format:
logger.warning("forcing incompatible image")
else:
logger.error("refusing to store " \
"incompatible format (use --force-image-format to override)")
sys.exit(1)
except DockerError as error:
if images_in_arv:
# We don't have Docker / we don't have the image locally,
# use image that's already uploaded to Arvados
image_hash = images_in_arv[0][1]['dockerhash']
else:
logger.error(str(error))
sys.exit(1)
image_repo_tag = '{}:{}'.format(args.image, args.tag) if not image_hash.startswith(args.image.lower()) else None
if args.name is None:
if image_repo_tag:
collection_name = 'Docker image {} {}'.format(image_repo_tag.replace("/", " "), image_hash[0:12])
else:
collection_name = 'Docker image {}'.format(image_hash[0:12])
else:
collection_name = args.name
# Acquire a lock so that only one arv-keepdocker process will
# dump/upload a particular docker image at a time. Do this before
# checking if the image already exists in Arvados so that if there
# is an upload already underway, when that upload completes and
# this process gets a turn, it will discover the Docker image is
# already available and exit quickly.
outfile_name = '{}.tar'.format(image_hash)
lockfile_name = '{}.lock'.format(outfile_name)
lockfile = None
cache_dir = get_cache_dir()
if cache_dir:
lockfile = open(os.path.join(cache_dir, lockfile_name), 'w+')
fcntl.flock(lockfile, fcntl.LOCK_EX)
try:
if not args.force:
# Check if this image is already in Arvados.
# Project where everything should be owned
parent_project_uuid = args.project_uuid or api.users().current().execute(
num_retries=args.retries)['uuid']
# Find image hash tags
existing_links = _get_docker_links(
api, args.retries,
filters=[['link_class', '=', 'docker_image_hash'],
['name', '=', image_hash]])
if existing_links:
# get readable collections
collections = api.collections().list(
filters=[['uuid', 'in', [link['head_uuid'] for link in existing_links]]],
select=["uuid", "owner_uuid", "name", "manifest_text"]
).execute(num_retries=args.retries)['items']
if collections:
# check for repo+tag links on these collections
if image_repo_tag:
existing_repo_tag = _get_docker_links(
api, args.retries,
filters=[['link_class', '=', 'docker_image_repo+tag'],
['name', '=', image_repo_tag],
['head_uuid', 'in', [c["uuid"] for c in collections]]])
else:
existing_repo_tag = []
try:
coll_uuid = next(items_owned_by(parent_project_uuid, collections))['uuid']
except StopIteration:
# create new collection owned by the project
coll_uuid = api.collections().create(
body={"manifest_text": collections[0]['manifest_text'],
"name": collection_name,
"owner_uuid": parent_project_uuid,
"properties": {"docker-image-repo-tag": image_repo_tag}},
ensure_unique_name=True
).execute(num_retries=args.retries)['uuid']
link_base = {'owner_uuid': parent_project_uuid,
'head_uuid': coll_uuid,
'properties': existing_links[0]['properties']}
if not any(items_owned_by(parent_project_uuid, existing_links)):
# create image link owned by the project
make_link(api, args.retries,
'docker_image_hash', image_hash, **link_base)
if image_repo_tag and not any(items_owned_by(parent_project_uuid, existing_repo_tag)):
# create repo+tag link owned by the project
make_link(api, args.retries, 'docker_image_repo+tag',
image_repo_tag, **link_base)
stdout.write(coll_uuid + "\n")
sys.exit(0)
# Open a file for the saved image, and write it if needed.
image_file, need_save = prep_image_file(outfile_name)
if need_save:
save_image(image_hash, image_file)
# Call arv-put with switches we inherited from it
# (a.k.a., switches that aren't our own).
if arguments is None:
arguments = sys.argv[1:]
arguments = [i for i in arguments if i not in (args.image, args.tag, image_repo_tag)]
put_args = keepdocker_parser.parse_known_args(arguments)[1]
# Don't fail when cached manifest is invalid, just ignore the cache.
put_args += ['--batch']
if args.name is None:
put_args += ['--name', collection_name]
coll_uuid = arv_put.main(
put_args + ['--filename', outfile_name, image_file.name], stdout=stdout,
install_sig_handlers=install_sig_handlers).strip()
# Managed properties could be already set
coll_properties = api.collections().get(uuid=coll_uuid).execute(num_retries=args.retries).get('properties', {})
coll_properties.update({"docker-image-repo-tag": image_repo_tag})
api.collections().update(uuid=coll_uuid, body={"properties": coll_properties}).execute(num_retries=args.retries)
# Read the image metadata and make Arvados links from it.
image_file.seek(0)
image_tar = tarfile.open(fileobj=image_file)
image_hash_type, _, raw_image_hash = image_hash.rpartition(':')
if image_hash_type:
json_filename = raw_image_hash + '.json'
else:
json_filename = raw_image_hash + '/json'
json_file = image_tar.extractfile(image_tar.getmember(json_filename))
image_metadata = json.loads(json_file.read().decode('utf-8'))
json_file.close()
image_tar.close()
link_base = {'head_uuid': coll_uuid, 'properties': {}}
if 'created' in image_metadata:
link_base['properties']['image_timestamp'] = image_metadata['created']
if args.project_uuid is not None:
link_base['owner_uuid'] = args.project_uuid
make_link(api, args.retries, 'docker_image_hash', image_hash, **link_base)
if image_repo_tag:
make_link(api, args.retries,
'docker_image_repo+tag', image_repo_tag, **link_base)
# Clean up.
image_file.close()
for filename in [stat_cache_name(image_file), image_file.name]:
try:
os.unlink(filename)
except OSError as error:
if error.errno != errno.ENOENT:
raise
finally:
if lockfile is not None:
# Closing the lockfile unlocks it.
lockfile.close()
if __name__ == '__main__':
main()
Functions
def check_docker(proc, description)
-
Expand source code
def check_docker(proc, description): proc.wait() if proc.returncode != 0: raise DockerError("docker {} returned status code {}". format(description, proc.returncode))
def docker_image_compatible(api, image_hash)
-
Expand source code
def docker_image_compatible(api, image_hash): supported = api._rootDesc.get('dockerImageFormats', []) if not supported: logger.warning("server does not specify supported image formats (see docker_image_formats in server config).") return False fmt = docker_image_format(image_hash) if fmt in supported: return True else: logger.error("image format is {!r} " \ "but server supports only {!r}".format(fmt, supported)) return False
def docker_image_format(image_hash)
-
Return the registry format ('v1' or 'v2') of the given image.
Expand source code
def docker_image_format(image_hash): """Return the registry format ('v1' or 'v2') of the given image.""" cmd = popen_docker(['inspect', '--format={{.Id}}', image_hash], stdout=subprocess.PIPE) try: image_id = next(cmd.stdout).decode('utf-8').strip() if image_id.startswith('sha256:'): return 'v2' elif ':' not in image_id: return 'v1' else: return 'unknown' finally: check_docker(cmd, "inspect")
def docker_images()
-
Expand source code
def docker_images(): # Yield a DockerImage tuple for each installed image. list_proc = popen_docker(['images', '--no-trunc'], stdout=subprocess.PIPE) list_output = iter(list_proc.stdout) next(list_output) # Ignore the header line for line in list_output: words = line.split() words = [word.decode('utf-8') for word in words] size_index = len(words) - 2 repo, tag, imageid = words[:3] ctime = ' '.join(words[3:size_index]) vsize = ' '.join(words[size_index:]) yield DockerImage(repo, tag, imageid, ctime, vsize) list_proc.stdout.close() check_docker(list_proc, "images")
def docker_link_sort_key(link)
-
Build a sort key to find the latest available Docker image.
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 recentcreated_at
timestamp. This method generates a sort key for Docker metadata links to sort them from least to most preferred.Expand source code
def docker_link_sort_key(link): """Build a sort key to find the latest available Docker image. 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_as_naive( link['properties']['image_timestamp']) except (KeyError, ValueError): image_timestamp = EARLIEST_DATETIME try: created_timestamp = ciso8601.parse_datetime_as_naive(link['created_at']) except ValueError: created_timestamp = None return (image_timestamp, created_timestamp)
def find_image_hashes(image_search, image_tag=None)
-
Expand source code
def find_image_hashes(image_search, image_tag=None): # Query for a Docker images with the repository and tag and return # the image ids in a list. Returns empty list if no match is # found. list_proc = popen_docker(['inspect', "%s%s" % (image_search, ":"+image_tag if image_tag else "")], stdout=subprocess.PIPE) inspect = list_proc.stdout.read() list_proc.stdout.close() imageinfo = json.loads(inspect) return [i["Id"] for i in imageinfo]
def find_one_image_hash(image_search, image_tag=None)
-
Expand source code
def find_one_image_hash(image_search, image_tag=None): hashes = find_image_hashes(image_search, image_tag) hash_count = len(hashes) if hash_count == 1: return hashes.pop() elif hash_count == 0: raise DockerError("no matching image found") else: raise DockerError("{} images match {}".format(hash_count, image_search))
def get_cache_dir()
-
Expand source code
def get_cache_dir(): return arv_cmd.make_home_conf_dir( os.path.join('.cache', 'arvados', 'docker'), 0o700)
def items_owned_by(owner_uuid, arv_items)
-
Expand source code
def items_owned_by(owner_uuid, arv_items): return (item for item in arv_items if item['owner_uuid'] == owner_uuid)
def list_images_in_arv(api_client, num_retries, image_name=None, image_tag=None, project_uuid=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".
Expand source code
def list_images_in_arv(api_client, num_retries, image_name=None, image_tag=None, project_uuid=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 project_filter = [] if project_uuid is not None: project_filter = [["owner_uuid", "=", project_uuid]] 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')]]+project_filter) 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 + '%']]+project_filter) 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']]+project_filter) 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']]+project_filter) 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.items(): 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]]]+project_filter, select=['uuid'])} return [(image['collection'], image) for image in images if image['collection'] in existing_coll_uuids]
def main(arguments=None, stdout=sys.stdout, install_sig_handlers=True, api=None)
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def main(arguments=None, stdout=sys.stdout, install_sig_handlers=True, api=None): args = arg_parser.parse_args(arguments) if api is None: api = arvados.api('v1') if args.image is None or args.image == 'images': fmt = "{:30} {:10} {:12} {:29} {:20}\n" stdout.write(fmt.format("REPOSITORY", "TAG", "IMAGE ID", "COLLECTION", "CREATED")) try: for i, j in list_images_in_arv(api, args.retries): stdout.write(fmt.format(j["repo"], j["tag"], j["dockerhash"][0:12], i, j["timestamp"].strftime("%c"))) except IOError as e: if e.errno == errno.EPIPE: pass else: raise sys.exit(0) if re.search(r':\w[-.\w]{0,127}$', args.image): # image ends with :valid-tag if args.tag is not None: logger.error( "image %r already includes a tag, cannot add tag argument %r", args.image, args.tag) sys.exit(1) # rsplit() accommodates "myrepo.example:8888/repo/image:tag" args.image, args.tag = args.image.rsplit(':', 1) elif args.tag is None: args.tag = 'latest' # Pull the image if requested, unless the image is specified as a hash # that we already have. if args.pull and not find_image_hashes(args.image): pull_image(args.image, args.tag) images_in_arv = list_images_in_arv(api, args.retries, args.image, args.tag) image_hash = None try: image_hash = find_one_image_hash(args.image, args.tag) if not docker_image_compatible(api, image_hash): if args.force_image_format: logger.warning("forcing incompatible image") else: logger.error("refusing to store " \ "incompatible format (use --force-image-format to override)") sys.exit(1) except DockerError as error: if images_in_arv: # We don't have Docker / we don't have the image locally, # use image that's already uploaded to Arvados image_hash = images_in_arv[0][1]['dockerhash'] else: logger.error(str(error)) sys.exit(1) image_repo_tag = '{}:{}'.format(args.image, args.tag) if not image_hash.startswith(args.image.lower()) else None if args.name is None: if image_repo_tag: collection_name = 'Docker image {} {}'.format(image_repo_tag.replace("/", " "), image_hash[0:12]) else: collection_name = 'Docker image {}'.format(image_hash[0:12]) else: collection_name = args.name # Acquire a lock so that only one arv-keepdocker process will # dump/upload a particular docker image at a time. Do this before # checking if the image already exists in Arvados so that if there # is an upload already underway, when that upload completes and # this process gets a turn, it will discover the Docker image is # already available and exit quickly. outfile_name = '{}.tar'.format(image_hash) lockfile_name = '{}.lock'.format(outfile_name) lockfile = None cache_dir = get_cache_dir() if cache_dir: lockfile = open(os.path.join(cache_dir, lockfile_name), 'w+') fcntl.flock(lockfile, fcntl.LOCK_EX) try: if not args.force: # Check if this image is already in Arvados. # Project where everything should be owned parent_project_uuid = args.project_uuid or api.users().current().execute( num_retries=args.retries)['uuid'] # Find image hash tags existing_links = _get_docker_links( api, args.retries, filters=[['link_class', '=', 'docker_image_hash'], ['name', '=', image_hash]]) if existing_links: # get readable collections collections = api.collections().list( filters=[['uuid', 'in', [link['head_uuid'] for link in existing_links]]], select=["uuid", "owner_uuid", "name", "manifest_text"] ).execute(num_retries=args.retries)['items'] if collections: # check for repo+tag links on these collections if image_repo_tag: existing_repo_tag = _get_docker_links( api, args.retries, filters=[['link_class', '=', 'docker_image_repo+tag'], ['name', '=', image_repo_tag], ['head_uuid', 'in', [c["uuid"] for c in collections]]]) else: existing_repo_tag = [] try: coll_uuid = next(items_owned_by(parent_project_uuid, collections))['uuid'] except StopIteration: # create new collection owned by the project coll_uuid = api.collections().create( body={"manifest_text": collections[0]['manifest_text'], "name": collection_name, "owner_uuid": parent_project_uuid, "properties": {"docker-image-repo-tag": image_repo_tag}}, ensure_unique_name=True ).execute(num_retries=args.retries)['uuid'] link_base = {'owner_uuid': parent_project_uuid, 'head_uuid': coll_uuid, 'properties': existing_links[0]['properties']} if not any(items_owned_by(parent_project_uuid, existing_links)): # create image link owned by the project make_link(api, args.retries, 'docker_image_hash', image_hash, **link_base) if image_repo_tag and not any(items_owned_by(parent_project_uuid, existing_repo_tag)): # create repo+tag link owned by the project make_link(api, args.retries, 'docker_image_repo+tag', image_repo_tag, **link_base) stdout.write(coll_uuid + "\n") sys.exit(0) # Open a file for the saved image, and write it if needed. image_file, need_save = prep_image_file(outfile_name) if need_save: save_image(image_hash, image_file) # Call arv-put with switches we inherited from it # (a.k.a., switches that aren't our own). if arguments is None: arguments = sys.argv[1:] arguments = [i for i in arguments if i not in (args.image, args.tag, image_repo_tag)] put_args = keepdocker_parser.parse_known_args(arguments)[1] # Don't fail when cached manifest is invalid, just ignore the cache. put_args += ['--batch'] if args.name is None: put_args += ['--name', collection_name] coll_uuid = arv_put.main( put_args + ['--filename', outfile_name, image_file.name], stdout=stdout, install_sig_handlers=install_sig_handlers).strip() # Managed properties could be already set coll_properties = api.collections().get(uuid=coll_uuid).execute(num_retries=args.retries).get('properties', {}) coll_properties.update({"docker-image-repo-tag": image_repo_tag}) api.collections().update(uuid=coll_uuid, body={"properties": coll_properties}).execute(num_retries=args.retries) # Read the image metadata and make Arvados links from it. image_file.seek(0) image_tar = tarfile.open(fileobj=image_file) image_hash_type, _, raw_image_hash = image_hash.rpartition(':') if image_hash_type: json_filename = raw_image_hash + '.json' else: json_filename = raw_image_hash + '/json' json_file = image_tar.extractfile(image_tar.getmember(json_filename)) image_metadata = json.loads(json_file.read().decode('utf-8')) json_file.close() image_tar.close() link_base = {'head_uuid': coll_uuid, 'properties': {}} if 'created' in image_metadata: link_base['properties']['image_timestamp'] = image_metadata['created'] if args.project_uuid is not None: link_base['owner_uuid'] = args.project_uuid make_link(api, args.retries, 'docker_image_hash', image_hash, **link_base) if image_repo_tag: make_link(api, args.retries, 'docker_image_repo+tag', image_repo_tag, **link_base) # Clean up. image_file.close() for filename in [stat_cache_name(image_file), image_file.name]: try: os.unlink(filename) except OSError as error: if error.errno != errno.ENOENT: raise finally: if lockfile is not None: # Closing the lockfile unlocks it. lockfile.close()
def make_link(api_client, num_retries, link_class, link_name, **link_attrs)
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def make_link(api_client, num_retries, link_class, link_name, **link_attrs): link_attrs.update({'link_class': link_class, 'name': link_name}) return api_client.links().create(body=link_attrs).execute( num_retries=num_retries)
def popen_docker(cmd, *args, **kwargs)
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def popen_docker(cmd, *args, **kwargs): manage_stdin = ('stdin' not in kwargs) kwargs.setdefault('stdin', subprocess.PIPE) kwargs.setdefault('stdout', subprocess.PIPE) kwargs.setdefault('stderr', subprocess.PIPE) try: docker_proc = subprocess.Popen(['docker'] + cmd, *args, **kwargs) except OSError: # No docker in $PATH, try docker.io docker_proc = subprocess.Popen(['docker.io'] + cmd, *args, **kwargs) if manage_stdin: docker_proc.stdin.close() return docker_proc
def prep_image_file(filename)
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def prep_image_file(filename): # Return a file object ready to save a Docker image, # and a boolean indicating whether or not we need to actually save the # image (False if a cached save is available). cache_dir = get_cache_dir() if cache_dir is None: image_file = tempfile.NamedTemporaryFile(suffix='.tar') need_save = True else: file_path = os.path.join(cache_dir, filename) try: with open(stat_cache_name(file_path)) as statfile: prev_stat = json.load(statfile) now_stat = os.stat(file_path) need_save = any(prev_stat[field] != now_stat[field] for field in [ST_MTIME, ST_SIZE]) except STAT_CACHE_ERRORS + (AttributeError, IndexError): need_save = True # We couldn't compare against old stats image_file = open(file_path, 'w+b' if need_save else 'rb') return image_file, need_save
def pull_image(image_name, image_tag)
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def pull_image(image_name, image_tag): check_docker(popen_docker(['pull', '{}:{}'.format(image_name, image_tag)]), "pull")
def save_image(image_hash, image_file)
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def save_image(image_hash, image_file): # Save the specified Docker image to image_file, then try to save its # stats so we can try to resume after interruption. check_docker(popen_docker(['save', image_hash], stdout=image_file), "save") image_file.flush() try: with open(stat_cache_name(image_file), 'w') as statfile: json.dump(tuple(os.fstat(image_file.fileno())), statfile) except STAT_CACHE_ERRORS: pass # We won't resume from this cache. No big deal.
def stat_cache_name(image_file)
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def stat_cache_name(image_file): return getattr(image_file, 'name', image_file) + '.stat'
Classes
class DockerError (*args, **kwargs)
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Common base class for all non-exit exceptions.
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class DockerError(Exception): pass
Ancestors
- builtins.Exception
- builtins.BaseException
class DockerImage (repo, tag, hash, created, vsize)
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DockerImage(repo, tag, hash, created, vsize)
Ancestors
- builtins.tuple
Instance variables
var created
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Alias for field number 3
var hash
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Alias for field number 2
var repo
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Alias for field number 0
var tag
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Alias for field number 1
var vsize
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Alias for field number 4