openstack/ironic
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Merge "Checksum files before raw conversion" into stable/2024.1

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Zuul 2024-10-03 19:11:29 +00:00 committed by Gerrit Code Review
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34
doc/source/admin/security.rst
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@ -19,6 +19,40 @@ OpenStack deployment.
.. TODO: add "Multi-tenancy Considerations" section
Image Checksums
===============
Ironic has long provided a capacity to supply and check a checksum for disk
images being deployed. However, one aspect which Ironic has not asserted is
"Why?" in terms of "Is it for security?" or "Is it for data integrity?".
The answer is both to ensure a higher level of security with remote
image files, *and* provide faster feedback should a image being transferred
happens to be corrupted.
Normally checksums are verified by the ``ironic-python-agent`` **OR** the
deployment interface responsible for overall deployment operation. That being
said, not *every* deployment interface relies on disk images which have
checksums, and those deployment interfaces are for specific use cases which
Ironic users leverage, outside of the "general" use case capabilities provided
by the ``direct`` deployment interface.
.. NOTE::
Use of the node ``instance_info/image_checksum`` field is discouraged
for integrated OpenStack Users as usage of the matching Glance Image
Service field is also deprecated. That being said, Ironic retains this
feature by popular demand while also enabling also retain simplified
operator interaction.
The newer field values supported by Glance are also specifically
supported by Ironic as ``instance_info/image_os_hash_value`` for
checksum values and ``instance_info/image_os_hash_algo`` field for
the checksum algorithm.
.. WARNING::
Setting a checksum value to a URL is supported, *however* doing this is
making a "tradeoff" with security as the remote checksum *can* change.
Conductor support this functionality can be disabled using the
:oslo.config:option:`conductor.disable_support_for_checksum_files` setting.
REST API: user roles and policy settings
========================================

258
ironic/common/checksum_utils.py Normal file
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@ -0,0 +1,258 @@
# Copyright (c) 2024 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
import re
import time
from urllib import parse as urlparse
from oslo_log import log as logging
from oslo_utils import fileutils
from ironic.common import exception
from ironic.common.i18n import _
from ironic.common import image_service
from ironic.conf import CONF
LOG = logging.getLogger(__name__)
# REGEX matches for Checksum file payloads
# If this list requires changes, it should be changed in
# ironic-python-agent (extensions/standby.py) as well.
MD5_MATCH = r"^([a-fA-F\d]{32})\s" # MD5 at beginning of line
MD5_MATCH_END = r"\s([a-fA-F\d]{32})$" # MD5 at end of line
MD5_MATCH_ONLY = r"^([a-fA-F\d]{32})$" # MD5 only
SHA256_MATCH = r"^([a-fA-F\d]{64})\s" # SHA256 at beginning of line
SHA256_MATCH_END = r"\s([a-fA-F\d]{64})$" # SHA256 at end of line
SHA256_MATCH_ONLY = r"^([a-fA-F\d]{64})$" # SHA256 only
SHA512_MATCH = r"^([a-fA-F\d]{128})\s" # SHA512 at beginning of line
SHA512_MATCH_END = r"\s([a-fA-F\d]{128})$" # SHA512 at end of line
SHA512_MATCH_ONLY = r"^([a-fA-F\d]{128})$" # SHA512 only
FILENAME_MATCH_END = r"\s[*]?{filename}$" # Filename binary/text end of line
FILENAME_MATCH_PARENTHESES = r"\s\({filename}\)\s" # CentOS images
CHECKSUM_MATCHERS = (MD5_MATCH, MD5_MATCH_END, SHA256_MATCH, SHA256_MATCH_END,
SHA512_MATCH, SHA512_MATCH_END)
CHECKSUM_ONLY_MATCHERS = (MD5_MATCH_ONLY, SHA256_MATCH_ONLY, SHA512_MATCH_ONLY)
FILENAME_MATCHERS = (FILENAME_MATCH_END, FILENAME_MATCH_PARENTHESES)
def validate_checksum(path, checksum, checksum_algo=None):
"""Validate image checksum.
:param path: File path in the form of a string to calculate a checksum
which is compared to the checksum field.
:param checksum: The supplied checksum value, a string, which will be
compared to the file.
:param checksum_algo: The checksum type of the algorithm.
:raises: ImageChecksumError if the supplied data cannot be parsed or
if the supplied value does not match the supplied checksum
value.
"""
# TODO(TheJilia): At some point, we likely need to compare
# the incoming checksum algorithm upfront, ut if one is invoked which
# is not supported, hashlib will raise ValueError.
use_checksum_algo = None
if ":" in checksum:
# A form of communicating the checksum algorithm is to delimit the
# type from the value. See ansible deploy interface where this
# is most evident.
split_checksum = checksum.split(":")
use_checksum = split_checksum[1]
use_checksum_algo = split_checksum[0]
else:
use_checksum = checksum
if not use_checksum_algo:
use_checksum_algo = checksum_algo
# If we have a zero length value, but we split it, we have
# invalid input. Also, checksum is what we expect, algorithm is
# optional. This guards against the split of a value which is
# image_checksum = "sha256:" which is a potential side effect of
# splitting the string.
if use_checksum == '':
raise exception.ImageChecksumError()
# Make everything lower case since we don't expect mixed case,
# but we may have human originated input on the supplied algorithm.
try:
if not use_checksum_algo:
# This is backwards compatible support for a bare checksum.
calculated = compute_image_checksum(path)
else:
calculated = compute_image_checksum(path,
use_checksum_algo.lower())
except ValueError:
# ValueError is raised when an invalid/unsupported/unknown
# checksum algorithm is invoked.
LOG.error("Failed to generate checksum for file %(path)s, possible "
"invalid checksum algorithm: %(algo)s",
{"path": path,
"algo": use_checksum_algo})
raise exception.ImageChecksumAlgorithmFailure()
except OSError:
LOG.error("Failed to read file %(path)s to compute checksum.",
{"path": path})
raise exception.ImageChecksumFileReadFailure()
if (use_checksum is not None
and calculated.lower() != use_checksum.lower()):
LOG.error("We were supplied a checksum value of %(supplied)s, but "
"calculated a value of %(value)s. This is a fatal error.",
{"supplied": use_checksum,
"value": calculated})
raise exception.ImageChecksumError()
def compute_image_checksum(image_path, algorithm='md5'):
"""Compute checksum by given image path and algorithm.
:param image_path: The path to the file to undergo checksum calculation.
:param algorithm: The checksum algorithm to utilize. Defaults
to 'md5' due to historical support reasons in Ironic.
:returns: The calculated checksum value.
:raises: ValueError when the checksum algorithm is not supported
by the system.
"""
time_start = time.time()
LOG.debug('Start computing %(algo)s checksum for image %(image)s.',
{'algo': algorithm, 'image': image_path})
checksum = fileutils.compute_file_checksum(image_path,
algorithm=algorithm)
time_elapsed = time.time() - time_start
LOG.debug('Computed %(algo)s checksum for image %(image)s in '
'%(delta).2f seconds, checksum value: %(checksum)s.',
{'algo': algorithm, 'image': image_path, 'delta': time_elapsed,
'checksum': checksum})
return checksum
def get_checksum_and_algo(instance_info):
"""Get and return the image checksum and algo.
:param instance_info: The node instance info, or newly updated/generated
instance_info value.
:returns: A tuple containing two values, a checksum and algorithm,
if available.
"""
checksum_algo = None
if 'image_os_hash_value' in instance_info.keys():
# A value set by image_os_hash_value supersedes other
# possible uses as it is specific.
checksum = instance_info.get('image_os_hash_value')
checksum_algo = instance_info.get('image_os_hash_algo')
else:
checksum = instance_info.get('image_checksum')
if is_checksum_url(checksum):
image_source = instance_info.get('image_source')
checksum = get_checksum_from_url(checksum, image_source)
# NOTE(TheJulia): This is all based on SHA-2 lengths.
# SHA-3 would require a hint and it would not be a fixed length.
# That said, SHA-2 is still valid and has not been withdrawn.
checksum_len = len(checksum)
if checksum_len == 128:
# SHA2-512 is 512 bits, 128 characters.
checksum_algo = "sha512"
elif checksum_len == 64:
checksum_algo = "sha256"
if checksum_len == 32 and not CONF.agent.allow_md5_checksum:
# MD5 not permitted and the checksum is the length of MD5
# and not otherwise defined.
LOG.error('Cannot compute the checksum as it uses MD5 '
'and is disabled by configuration. If the checksum '
'is *not* MD5, please specify the algorithm.')
raise exception.ImageChecksumAlgorithmFailure()
return checksum, checksum_algo
def is_checksum_url(checksum):
"""Identify if checksum is not a url.
:param checksum: The user supplied checksum value.
:returns: True if the checksum is a url, otherwise False.
:raises: ImageChecksumURLNotSupported should the conductor have this
support disabled.
"""
if (checksum.startswith('http://') or checksum.startswith('https://')):
if CONF.conductor.disable_support_for_checksum_files:
raise exception.ImageChecksumURLNotSupported()
return True
else:
return False
def get_checksum_from_url(checksum, image_source):
"""Gets a checksum value based upon a remote checksum URL file.
:param checksum: The URL to the checksum URL content.
:param image_soource: The image source utilized to match with
the contents of the URL payload file.
:raises: ImageDownloadFailed when the checksum file cannot be
accessed or cannot be parsed.
"""
LOG.debug('Attempting to download checksum from: %(checksum)s.',
{'checksum': checksum})
# Directly invoke the image service and get the checksum data.
resp = image_service.HttpImageService.get(checksum)
checksum_url = str(checksum)
# NOTE(TheJulia): The rest of this method is taken from
# ironic-python-agent. If a change is required here, it may
# be required in ironic-python-agent (extensions/standby.py).
lines = [line.strip() for line in resp.split('\n') if line.strip()]
if not lines:
raise exception.ImageDownloadFailed(image_href=checksum,
reason=_('Checksum file empty.'))
elif len(lines) == 1:
# Special case - checksums file with only the checksum itself
if ' ' not in lines[0]:
for matcher in CHECKSUM_ONLY_MATCHERS:
checksum = re.findall(matcher, lines[0])
if checksum:
return checksum[0]
raise exception.ImageDownloadFailed(
image_href=checksum_url,
reason=(
_("Invalid checksum file (No valid checksum found)")))
# FIXME(dtantsur): can we assume the same name for all images?
expected_fname = os.path.basename(urlparse.urlparse(
image_source).path)
for line in lines:
# Ignore comment lines
if line.startswith("#"):
continue
# Ignore checksums for other files
for matcher in FILENAME_MATCHERS:
if re.findall(matcher.format(filename=expected_fname), line):
break
else:
continue
for matcher in CHECKSUM_MATCHERS:
checksum = re.findall(matcher, line)
if checksum:
return checksum[0]
raise exception.ImageDownloadFailed(
image_href=checksum,
reason=(_("Checksum file does not contain name %s")
% expected_fname))

22
ironic/common/exception.py
View File

@ -897,3 +897,25 @@ class UnsupportedHardwareFeature(Invalid):
class InvalidImage(ImageUnacceptable):
_msg_fmt = _("The requested image is not valid for use.")
class ImageChecksumError(InvalidImage):
"""Exception indicating checksum failed to match."""
_msg_fmt = _("The supplied image checksum is invalid or does not match.")
class ImageChecksumAlgorithmFailure(InvalidImage):
"""Cannot load the requested or required checksum algorithm."""
_msg_fmt = _("The requested image checksum algorithm cannot be loaded.")
class ImageChecksumURLNotSupported(InvalidImage):
"""Exception indicating we cannot support the remote checksum file."""
_msg_fmt = _("Use of remote checksum files is not supported.")
class ImageChecksumFileReadFailure(InvalidImage):
"""An OSError was raised when trying to read the file."""
_msg_fmt = _("Failed to read the file from local storage "
"to perform a checksum operation.")
code = http_client.SERVICE_UNAVAILABLE

37
ironic/common/image_service.py
View File

@ -287,6 +287,43 @@ class HttpImageService(BaseImageService):
'no_cache': no_cache,
}
@staticmethod
def get(image_href):
"""Downloads content and returns the response text.
:param image_href: Image reference.
:raises: exception.ImageRefValidationFailed if GET request returned
response code not equal to 200.
:raises: exception.ImageDownloadFailed if:
* IOError happened during file write;
* GET request failed.
"""
try:
verify = strutils.bool_from_string(CONF.webserver_verify_ca,
strict=True)
except ValueError:
verify = CONF.webserver_verify_ca
try:
auth = HttpImageService.gen_auth_from_conf_user_pass(image_href)
response = requests.get(image_href, stream=False, verify=verify,
timeout=CONF.webserver_connection_timeout,
auth=auth)
if response.status_code != http_client.OK:
raise exception.ImageRefValidationFailed(
image_href=image_href,
reason=_("Got HTTP code %s instead of 200 in response "
"to GET request.") % response.status_code)
return response.text
except (OSError, requests.ConnectionError, requests.RequestException,
IOError) as e:
raise exception.ImageDownloadFailed(image_href=image_href,
reason=str(e))
class FileImageService(BaseImageService):
"""Provides retrieval of disk images available locally on the conductor."""

7
ironic/common/images.py
View File

@ -28,6 +28,7 @@ from oslo_log import log as logging
from oslo_utils import fileutils
import pycdlib
from ironic.common import checksum_utils
from ironic.common import exception
from ironic.common.glance_service import service_utils as glance_utils
from ironic.common.i18n import _
@ -386,9 +387,13 @@ def fetch_into(context, image_href, image_file):
{'image_href': image_href, 'time': time.time() - start})
def fetch(context, image_href, path, force_raw=False):
def fetch(context, image_href, path, force_raw=False,
checksum=None, checksum_algo=None):
with fileutils.remove_path_on_error(path):
fetch_into(context, image_href, path)
if (not CONF.conductor.disable_file_checksum
and checksum):
checksum_utils.validate_checksum(path, checksum, checksum_algo)
if force_raw:
image_to_raw(image_href, path, "%s.part" % path)

22
ironic/conf/conductor.py
View File

@ -460,6 +460,28 @@ opts = [
'permitted for deployment with Ironic. If an image '
'format outside of this list is detected, the image '
'validation logic will fail the deployment process.')),
cfg.BoolOpt('disable_file_checksum',
default=False,
mutable=False,
help=_('Deprecated Security option: In the default case, '
'image files have their checksums verified before '
'undergoing additional conductor side actions such '
'as image conversion. '
'Enabling this option opens the risk of files being '
'replaced at the source without the user\'s '
'knowledge.'),
deprecated_for_removal=True),
cfg.BoolOpt('disable_support_for_checksum_files',
default=False,
mutable=False,
help=_('Security option: By default Ironic will attempt to '
'retrieve a remote checksum file via HTTP(S) URL in '
'order to validate an image download. This is '
'functionality aligning with ironic-python-agent '
'support for standalone users. Disabling this '
'functionality by setting this option to True will '
'create a more secure environment, however it may '
'break users in an unexpected fashion.')),
]

70
ironic/drivers/modules/deploy_utils.py
View File

@ -16,7 +16,6 @@
import os
import re
import time
from ironic_lib import metrics_utils
from ironic_lib import utils as il_utils
@ -26,6 +25,7 @@ from oslo_utils import fileutils
from oslo_utils import strutils
from ironic.common import async_steps
from ironic.common import checksum_utils
from ironic.common import context
from ironic.common import exception
from ironic.common import faults
@ -60,6 +60,7 @@ RESCUE_LIKE_STATES = (states.RESCUING, states.RESCUEWAIT, states.RESCUEFAIL,
DISK_LAYOUT_PARAMS = ('root_gb', 'swap_mb', 'ephemeral_gb')
# All functions are called from deploy() directly or indirectly.
# They are split for stub-out.
@ -206,7 +207,8 @@ def check_for_missing_params(info_dict, error_msg, param_prefix=''):
def fetch_images(ctx, cache, images_info, force_raw=True,
expected_format=None):
expected_format=None, expected_checksum=None,
expected_checksum_algo=None):
"""Check for available disk space and fetch images using ImageCache.
:param ctx: context
@ -215,6 +217,10 @@ def fetch_images(ctx, cache, images_info, force_raw=True,
:param force_raw: boolean value, whether to convert the image to raw
format
:param expected_format: The expected format of the image.
:param expected_checksum: The expected image checksum, to be used if we
need to convert the image to raw prior to deploying.
:param expected_checksum_algo: The checksum algo in use, if separately
set.
:raises: InstanceDeployFailure if unable to find enough disk space
:raises: InvalidImage if the supplied image metadata or contents are
deemed to be invalid, unsafe, or not matching the expectations
@ -233,9 +239,12 @@ def fetch_images(ctx, cache, images_info, force_raw=True,
image_list = []
for href, path in images_info:
# NOTE(TheJulia): Href in this case can be an image UUID or a URL.
image_format = cache.fetch_image(href, path, ctx=ctx,
force_raw=force_raw,
expected_format=expected_format)
image_format = cache.fetch_image(
href, path, ctx=ctx,
force_raw=force_raw,
expected_format=expected_format,
expected_checksum=expected_checksum,
expected_checksum_algo=expected_checksum_algo)
image_list.append((href, path, image_format))
return image_list
@ -1072,7 +1081,8 @@ class InstanceImageCache(image_cache.ImageCache):
@METRICS.timer('cache_instance_image')
def cache_instance_image(ctx, node, force_raw=None, expected_format=None):
def cache_instance_image(ctx, node, force_raw=None, expected_format=None,
expected_checksum=None, expected_checksum_algo=None):
"""Fetch the instance's image from Glance
This method pulls the disk image and writes them to the appropriate
@ -1082,6 +1092,10 @@ def cache_instance_image(ctx, node, force_raw=None, expected_format=None):
:param node: an ironic node object
:param force_raw: whether convert image to raw format
:param expected_format: The expected format of the disk image contents.
:param expected_checksum: The expected image checksum, to be used if we
need to convert the image to raw prior to deploying.
:param expected_checksum_algo: The checksum algo in use, if separately
set.
:returns: a tuple containing the uuid of the image and the path in
the filesystem where image is cached.
:raises: InvalidImage if the requested image is invalid and cannot be
@ -1101,7 +1115,9 @@ def cache_instance_image(ctx, node, force_raw=None, expected_format=None):
{'image': uuid, 'uuid': node.uuid})
image_list = fetch_images(ctx, InstanceImageCache(), [(uuid, image_path)],
force_raw, expected_format=expected_format)
force_raw, expected_format=expected_format,
expected_checksum=expected_checksum,
expected_checksum_algo=expected_checksum_algo)
return (uuid, image_path, image_list[0][2])
@ -1119,17 +1135,11 @@ def destroy_images(node_uuid):
@METRICS.timer('compute_image_checksum')
def compute_image_checksum(image_path, algorithm='md5'):
"""Compute checksum by given image path and algorithm."""
time_start = time.time()
LOG.debug('Start computing %(algo)s checksum for image %(image)s.',
{'algo': algorithm, 'image': image_path})
checksum = fileutils.compute_file_checksum(image_path,
algorithm=algorithm)
time_elapsed = time.time() - time_start
LOG.debug('Computed %(algo)s checksum for image %(image)s in '
'%(delta).2f seconds, checksum value: %(checksum)s.',
{'algo': algorithm, 'image': image_path, 'delta': time_elapsed,
'checksum': checksum})
return checksum
# NOTE(TheJulia): This likely wouldn't be removed, but if we do
# significant refactoring we could likely just change everything
# over to the images common code, if we don't need the metrics
# data anymore.
return checksum_utils.compute_image_checksum(image_path, algorithm)
def remove_http_instance_symlink(node_uuid):
@ -1205,6 +1215,11 @@ def _validate_image_url(node, url, secret=False, inspect_image=None,
# let it run the image validation checking as it's normal course
# of action, and save what it tells us the image format is.
# if there *was* a mismatch, it will raise the error.
# NOTE(TheJulia): We don't need to supply the checksum here, because
# we are not converting the image. The net result is the deploy
# interface or remote agent has the responsibility to checksum the
# image.
_, image_path, img_format = cache_instance_image(
ctx,
node,
@ -1226,10 +1241,14 @@ def _cache_and_convert_image(task, instance_info, image_info=None):
initial_format = instance_info.get('image_disk_format')
else:
initial_format = image_info.get('disk_format')
checksum, checksum_algo = checksum_utils.get_checksum_and_algo(
instance_info)
_, image_path, img_format = cache_instance_image(
task.context, task.node,
force_raw=force_raw,
expected_format=initial_format)
expected_format=initial_format,
expected_checksum=checksum,
expected_checksum_algo=checksum_algo)
if force_raw or image_info is None:
if force_raw:
instance_info['image_disk_format'] = 'raw'
@ -1265,7 +1284,8 @@ def _cache_and_convert_image(task, instance_info, image_info=None):
'%(node)s due to image conversion',
{'image': image_path, 'node': task.node.uuid})
instance_info['image_checksum'] = None
hash_value = compute_image_checksum(image_path, os_hash_algo)
hash_value = checksum_utils.compute_image_checksum(image_path,
os_hash_algo)
else:
instance_info['image_checksum'] = old_checksum
@ -1363,6 +1383,11 @@ def build_instance_info_for_deploy(task):
image_info = glance.show(image_source)
LOG.debug('Got image info: %(info)s for node %(node)s.',
{'info': image_info, 'node': node.uuid})
# Values are explicitly set into the instance info field
# so IPA have the values available.
instance_info['image_checksum'] = image_info['checksum']
instance_info['image_os_hash_algo'] = image_info['os_hash_algo']
instance_info['image_os_hash_value'] = image_info['os_hash_value']
if image_download_source == 'swift':
# In this case, we are getting a file *from* swift for a glance
# image which is backed by swift. IPA downloads the file directly
@ -1376,14 +1401,9 @@ def build_instance_info_for_deploy(task):
validate_results = _validate_image_url(
node, swift_temp_url, secret=True,
expected_format=image_format)
# Values are explicitly set into the instance info field
# so IPA have the values available.
instance_info['image_url'] = swift_temp_url
instance_info['image_checksum'] = image_info['checksum']
instance_info['image_disk_format'] = \
validate_results.get('disk_format', image_format)
instance_info['image_os_hash_algo'] = image_info['os_hash_algo']
instance_info['image_os_hash_value'] = image_info['os_hash_value']
else:
# In this case, we're directly downloading the glance image and
# hosting it locally for retrieval by the IPA.

44
ironic/drivers/modules/image_cache.py
View File

@ -66,7 +66,8 @@ class ImageCache(object):
fileutils.ensure_tree(master_dir)
def fetch_image(self, href, dest_path, ctx=None, force_raw=True,
expected_format=None):
expected_format=None, expected_checksum=None,
expected_checksum_algo=None):
"""Fetch image by given href to the destination path.
Does nothing if destination path exists and is up to date with cache
@ -82,16 +83,32 @@ class ImageCache(object):
:param force_raw: boolean value, whether to convert the image to raw
format
:param expected_format: The expected image format.
:param expected_checksum: The expected image checksum
:param expected_checksum_algo: The expected image checksum algorithm,
if needed/supplied.
"""
img_download_lock_name = 'download-image'
if self.master_dir is None:
# NOTE(ghe): We don't share images between instances/hosts
# NOTE(TheJulia): These is a weird code path, because master_dir
# has to be None, which by default it never should be unless
# an operator forces it to None, which is a path we just never
# expect.
# TODO(TheJulia): This may be dead-ish code and likely needs
# to be removed. Likely originated *out* of just the iscsi
# deployment interface and local image caching.
if not CONF.parallel_image_downloads:
with lockutils.lock(img_download_lock_name):
_fetch(ctx, href, dest_path, force_raw)
_fetch(ctx, href, dest_path, force_raw,
expected_format=expected_format,
expected_checksum=expected_checksum,
expected_checksum_algo=expected_checksum_algo)
else:
with _concurrency_semaphore:
_fetch(ctx, href, dest_path, force_raw)
_fetch(ctx, href, dest_path, force_raw,
expected_format=expected_format,
expected_checksum=expected_checksum,
expected_checksum_algo=expected_checksum_algo)
return
# TODO(ghe): have hard links and counts the same behaviour in all fs
@ -143,13 +160,17 @@ class ImageCache(object):
self._download_image(
href, master_path, dest_path, img_info,
ctx=ctx, force_raw=force_raw,
expected_format=expected_format)
expected_format=expected_format,
expected_checksum=expected_checksum,
expected_checksum_algo=expected_checksum_algo)
# NOTE(dtantsur): we increased cache size - time to clean up
self.clean_up()
def _download_image(self, href, master_path, dest_path, img_info,
ctx=None, force_raw=True, expected_format=None):
ctx=None, force_raw=True, expected_format=None,
expected_checksum=None,
expected_checksum_algo=None):
"""Download image by href and store at a given path.
This method should be called with uuid-specific lock taken.
@ -162,6 +183,8 @@ class ImageCache(object):
:param force_raw: boolean value, whether to convert the image to raw
format
:param expected_format: The expected original format for the image.
:param expected_checksum: The expected image checksum.
:param expected_checksum_algo: The expected image checksum algorithm.
:raise ImageDownloadFailed: when the image cache and the image HTTP or
TFTP location are on different file system,
causing hard link to fail.
@ -173,7 +196,9 @@ class ImageCache(object):
try:
with _concurrency_semaphore:
_fetch(ctx, href, tmp_path, force_raw, expected_format)
_fetch(ctx, href, tmp_path, force_raw, expected_format,
expected_checksum=expected_checksum,
expected_checksum_algo=expected_checksum_algo)
if img_info.get('no_cache'):
LOG.debug("Caching is disabled for image %s", href)
@ -337,13 +362,16 @@ def _free_disk_space_for(path):
return stat.f_frsize * stat.f_bavail
def _fetch(context, image_href, path, force_raw=False, expected_format=None):
def _fetch(context, image_href, path, force_raw=False, expected_format=None,
expected_checksum=None, expected_checksum_algo=None):
"""Fetch image and convert to raw format if needed."""
path_tmp = "%s.part" % path
if os.path.exists(path_tmp):
LOG.warning("%s exist, assuming it's stale", path_tmp)
os.remove(path_tmp)
images.fetch(context, image_href, path_tmp, force_raw=False)
images.fetch(context, image_href, path_tmp, force_raw=False,
checksum=expected_checksum,
checksum_algo=expected_checksum_algo)
# By default, the image format is unknown
image_format = None
disable_dii = CONF.conductor.disable_deep_image_inspection

211
ironic/tests/unit/common/test_checksum_utils.py Normal file
View File

@ -0,0 +1,211 @@
# coding=utf-8
# Copyright 2024 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from unittest import mock
from oslo_config import cfg
from ironic.common import checksum_utils
from ironic.common import exception
from ironic.common import image_service
from ironic.tests import base
CONF = cfg.CONF
@mock.patch.object(checksum_utils, 'compute_image_checksum',
autospec=True)
class IronicChecksumUtilsValidateTestCase(base.TestCase):
def test_validate_checksum(self, mock_compute):
mock_compute.return_value = 'f00'
checksum_utils.validate_checksum('path', 'f00', 'algo')
mock_compute.assert_called_once_with('path', 'algo')
def test_validate_checksum_mixed_case(self, mock_compute):
mock_compute.return_value = 'f00'
checksum_utils.validate_checksum('path', 'F00', 'ALGO')
mock_compute.assert_called_once_with('path', 'algo')
def test_validate_checksum_mixed_md5(self, mock_compute):
mock_compute.return_value = 'f00'
checksum_utils.validate_checksum('path', 'F00')
mock_compute.assert_called_once_with('path')
def test_validate_checksum_mismatch(self, mock_compute):
mock_compute.return_value = 'a00'
self.assertRaises(exception.ImageChecksumError,
checksum_utils.validate_checksum,
'path', 'f00', 'algo')
mock_compute.assert_called_once_with('path', 'algo')
def test_validate_checksum_hashlib_not_supports_algo(self, mock_compute):
mock_compute.side_effect = ValueError()
self.assertRaises(exception.ImageChecksumAlgorithmFailure,
checksum_utils.validate_checksum,
'path', 'f00', 'algo')
mock_compute.assert_called_once_with('path', 'algo')
def test_validate_checksum_file_not_found(self, mock_compute):
mock_compute.side_effect = OSError()
self.assertRaises(exception.ImageChecksumFileReadFailure,
checksum_utils.validate_checksum,
'path', 'f00', 'algo')
mock_compute.assert_called_once_with('path', 'algo')
def test_validate_checksum_mixed_case_delimited(self, mock_compute):
mock_compute.return_value = 'f00'
checksum_utils.validate_checksum('path', 'algo:F00')
mock_compute.assert_called_once_with('path', 'algo')
class IronicChecksumUtilsTestCase(base.TestCase):
def test_is_checksum_url_string(self):
self.assertFalse(checksum_utils.is_checksum_url('f00'))
def test_is_checksum_url_file(self):
self.assertFalse(checksum_utils.is_checksum_url('file://foo'))
def test_is_checksum_url(self):
urls = ['http://foo.local/file',
'https://foo.local/file']
for url in urls:
self.assertTrue(checksum_utils.is_checksum_url(url))
def test_get_checksum_and_algo_image_checksum(self):
value = 'c46f2c98efe1cd246be1796cd842246e'
i_info = {'image_checksum': value}
csum, algo = checksum_utils.get_checksum_and_algo(i_info)
self.assertEqual(value, csum)
self.assertIsNone(algo)
def test_get_checksum_and_algo_image_checksum_not_allowed(self):
CONF.set_override('allow_md5_checksum', False, group='agent')
value = 'c46f2c98efe1cd246be1796cd842246e'
i_info = {'image_checksum': value}
self.assertRaises(exception.ImageChecksumAlgorithmFailure,
checksum_utils.get_checksum_and_algo,
i_info)
def test_get_checksum_and_algo_image_checksum_glance(self):
value = 'c46f2c98efe1cd246be1796cd842246e'
i_info = {'image_os_hash_value': value,
'image_os_hash_algo': 'foobar'}
csum, algo = checksum_utils.get_checksum_and_algo(i_info)
self.assertEqual(value, csum)
self.assertEqual('foobar', algo)
def test_get_checksum_and_algo_image_checksum_sha256(self):
value = 'a' * 64
i_info = {'image_checksum': value}
csum, algo = checksum_utils.get_checksum_and_algo(i_info)
self.assertEqual(value, csum)
self.assertEqual('sha256', algo)
def test_get_checksum_and_algo_image_checksum_sha512(self):
value = 'f' * 128
i_info = {'image_checksum': value}
csum, algo = checksum_utils.get_checksum_and_algo(i_info)
self.assertEqual(value, csum)
self.assertEqual('sha512', algo)
@mock.patch.object(checksum_utils, 'get_checksum_from_url', autospec=True)
def test_get_checksum_and_algo_image_checksum_http_url(self, mock_get):
value = 'http://checksum-url'
i_info = {
'image_checksum': value,
'image_source': 'image-ref'
}
mock_get.return_value = 'f' * 64
csum, algo = checksum_utils.get_checksum_and_algo(i_info)
mock_get.assert_called_once_with(value, 'image-ref')
self.assertEqual('f' * 64, csum)
self.assertEqual('sha256', algo)
@mock.patch.object(checksum_utils, 'get_checksum_from_url', autospec=True)
def test_get_checksum_and_algo_image_checksum_https_url(self, mock_get):
value = 'https://checksum-url'
i_info = {
'image_checksum': value,
'image_source': 'image-ref'
}
mock_get.return_value = 'f' * 128
csum, algo = checksum_utils.get_checksum_and_algo(i_info)
mock_get.assert_called_once_with(value, 'image-ref')
self.assertEqual('f' * 128, csum)
self.assertEqual('sha512', algo)
@mock.patch.object(image_service.HttpImageService, 'get',
autospec=True)
class IronicChecksumUtilsGetChecksumTestCase(base.TestCase):
def test_get_checksum_from_url_empty_response(self, mock_get):
mock_get.return_value = ''
error = ('Failed to download image https://checksum-url, '
'reason: Checksum file empty.')
self.assertRaisesRegex(exception.ImageDownloadFailed,
error,
checksum_utils.get_checksum_from_url,
'https://checksum-url',
'https://image-url/file')
mock_get.assert_called_once_with('https://checksum-url')
def test_get_checksum_from_url_one_line(self, mock_get):
mock_get.return_value = 'a' * 32
csum = checksum_utils.get_checksum_from_url(
'https://checksum-url', 'https://image-url/file')
mock_get.assert_called_once_with('https://checksum-url')
self.assertEqual('a' * 32, csum)
def test_get_checksum_from_url_nomatch_line(self, mock_get):
mock_get.return_value = 'foobar'
# For some reason assertRaisesRegex really doesn't like
# the error. Easiest path is just to assertTrue the compare.
exc = self.assertRaises(exception.ImageDownloadFailed,
checksum_utils.get_checksum_from_url,
'https://checksum-url',
'https://image-url/file')
self.assertTrue(
'Invalid checksum file (No valid checksum found' in str(exc))
mock_get.assert_called_once_with('https://checksum-url')
def test_get_checksum_from_url_multiline(self, mock_get):
test_csum = ('f2ca1bb6c7e907d06dafe4687e579fce76b37e4e9'
'3b7605022da52e6ccc26fd2')
mock_get.return_value = ('fee f00\n%s file\nbar fee\nf00' % test_csum)
# For some reason assertRaisesRegex really doesn't like
# the error. Easiest path is just to assertTrue the compare.
checksum = checksum_utils.get_checksum_from_url(
'https://checksum-url',
'https://image-url/file')
self.assertEqual(test_csum, checksum)
mock_get.assert_called_once_with('https://checksum-url')
def test_get_checksum_from_url_multiline_no_file(self, mock_get):
test_csum = 'a' * 64
error = ("Failed to download image https://checksum-url, reason: "
"Checksum file does not contain name file")
mock_get.return_value = ('f00\n%s\nbar\nf00' % test_csum)
# For some reason assertRaisesRegex really doesn't like
# the error. Easiest path is just to assertTrue the compare.
self.assertRaisesRegex(exception.ImageDownloadFailed,
error,
checksum_utils.get_checksum_from_url,
'https://checksum-url',
'https://image-url/file')
mock_get.assert_called_once_with('https://checksum-url')

34
ironic/tests/unit/common/test_image_service.py
View File

@ -574,6 +574,40 @@ class HttpImageServiceTestCase(base.TestCase):
verify=True,
timeout=15, auth=None)
@mock.patch.object(requests, 'get', autospec=True)
def test_get_success(self, req_get_mock):
response_mock = req_get_mock.return_value
response_mock.status_code = http_client.OK
response_mock.text = 'value'
self.assertEqual('value', self.service.get('http://url'))
req_get_mock.assert_called_once_with('http://url', stream=False,
verify=True, timeout=60,
auth=None)
@mock.patch.object(requests, 'get', autospec=True)
def test_get_handles_exceptions(self, req_get_mock):
for exc in [OSError, requests.ConnectionError,
requests.RequestException, IOError]:
req_get_mock.reset_mock()
req_get_mock.side_effect = exc
self.assertRaises(exception.ImageDownloadFailed,
self.service.get,
'http://url')
req_get_mock.assert_called_once_with('http://url', stream=False,
verify=True, timeout=60,
auth=None)
@mock.patch.object(requests, 'get', autospec=True)
def test_get_success_verify_false(self, req_get_mock):
cfg.CONF.set_override('webserver_verify_ca', False)
response_mock = req_get_mock.return_value
response_mock.status_code = http_client.OK
response_mock.text = 'value'
self.assertEqual('value', self.service.get('http://url'))
req_get_mock.assert_called_once_with('http://url', stream=False,
verify=False, timeout=60,
auth=None)
class FileImageServiceTestCase(base.TestCase):
def setUp(self):

95
ironic/tests/unit/common/test_images.py
View File

@ -23,6 +23,7 @@ from unittest import mock
from oslo_concurrency import processutils
from oslo_config import cfg
from oslo_utils import fileutils
from ironic.common import exception
from ironic.common.glance_service import service_utils as glance_utils
@ -73,6 +74,100 @@ class IronicImagesTestCase(base.TestCase):
image_to_raw_mock.assert_called_once_with(
'image_href', 'path', 'path.part')
@mock.patch.object(fileutils, 'compute_file_checksum',
autospec=True)
@mock.patch.object(image_service, 'get_image_service', autospec=True)
@mock.patch.object(images, 'image_to_raw', autospec=True)
@mock.patch.object(builtins, 'open', autospec=True)
def test_fetch_image_service_force_raw_with_checksum(
self, open_mock, image_to_raw_mock,
image_service_mock, mock_checksum):
mock_file_handle = mock.MagicMock(spec=io.BytesIO)
mock_file_handle.__enter__.return_value = 'file'
open_mock.return_value = mock_file_handle
mock_checksum.return_value = 'f00'
images.fetch('context', 'image_href', 'path', force_raw=True,
checksum='f00', checksum_algo='sha256')
mock_checksum.assert_called_once_with('path', algorithm='sha256')
open_mock.assert_called_once_with('path', 'wb')
image_service_mock.return_value.download.assert_called_once_with(
'image_href', 'file')
image_to_raw_mock.assert_called_once_with(
'image_href', 'path', 'path.part')
@mock.patch.object(fileutils, 'compute_file_checksum',
autospec=True)
@mock.patch.object(image_service, 'get_image_service', autospec=True)
@mock.patch.object(images, 'image_to_raw', autospec=True)
@mock.patch.object(builtins, 'open', autospec=True)
def test_fetch_image_service_with_checksum_mismatch(
self, open_mock, image_to_raw_mock,
image_service_mock, mock_checksum):
mock_file_handle = mock.MagicMock(spec=io.BytesIO)
mock_file_handle.__enter__.return_value = 'file'
open_mock.return_value = mock_file_handle
mock_checksum.return_value = 'a00'
self.assertRaises(exception.ImageChecksumError,
images.fetch, 'context', 'image_href',
'path', force_raw=True,
checksum='f00', checksum_algo='sha256')
mock_checksum.assert_called_once_with('path', algorithm='sha256')
open_mock.assert_called_once_with('path', 'wb')
image_service_mock.return_value.download.assert_called_once_with(
'image_href', 'file')
# If the checksum fails, then we don't attempt to convert the image.
image_to_raw_mock.assert_not_called()
@mock.patch.object(fileutils, 'compute_file_checksum',
autospec=True)
@mock.patch.object(image_service, 'get_image_service', autospec=True)
@mock.patch.object(images, 'image_to_raw', autospec=True)
@mock.patch.object(builtins, 'open', autospec=True)
def test_fetch_image_service_force_raw_no_checksum_algo(
self, open_mock, image_to_raw_mock,
image_service_mock, mock_checksum):
mock_file_handle = mock.MagicMock(spec=io.BytesIO)
mock_file_handle.__enter__.return_value = 'file'
open_mock.return_value = mock_file_handle
mock_checksum.return_value = 'f00'
images.fetch('context', 'image_href', 'path', force_raw=True,
checksum='f00')
mock_checksum.assert_called_once_with('path', algorithm='md5')
open_mock.assert_called_once_with('path', 'wb')
image_service_mock.return_value.download.assert_called_once_with(
'image_href', 'file')
image_to_raw_mock.assert_called_once_with(
'image_href', 'path', 'path.part')
@mock.patch.object(fileutils, 'compute_file_checksum',
autospec=True)
@mock.patch.object(image_service, 'get_image_service', autospec=True)
@mock.patch.object(images, 'image_to_raw', autospec=True)
@mock.patch.object(builtins, 'open', autospec=True)
def test_fetch_image_service_force_raw_combined_algo(
self, open_mock, image_to_raw_mock,
image_service_mock, mock_checksum):
mock_file_handle = mock.MagicMock(spec=io.BytesIO)
mock_file_handle.__enter__.return_value = 'file'
open_mock.return_value = mock_file_handle
mock_checksum.return_value = 'f00'
images.fetch('context', 'image_href', 'path', force_raw=True,
checksum='sha512:f00')
mock_checksum.assert_called_once_with('path', algorithm='sha512')
open_mock.assert_called_once_with('path', 'wb')
image_service_mock.return_value.download.assert_called_once_with(
'image_href', 'file')
image_to_raw_mock.assert_called_once_with(
'image_href', 'path', 'path.part')
@mock.patch.object(image_format_inspector, 'detect_file_format',
autospec=True)
def test_image_to_raw_not_permitted_format(self, detect_format_mock):

229
ironic/tests/unit/drivers/modules/test_deploy_utils.py
View File

@ -24,6 +24,7 @@ from oslo_utils import fileutils
from oslo_utils import uuidutils
from ironic.common import boot_devices
from ironic.common import checksum_utils
from ironic.common import exception
from ironic.common import faults
from ironic.common import image_service
@ -604,10 +605,33 @@ class OtherFunctionTestCase(db_base.DbTestCase):
utils.fetch_images(None, mock_cache, [('uuid', 'path')])
mock_clean_up_caches.assert_called_once_with(None, 'master_dir',
[('uuid', 'path')])
mock_cache.fetch_image.assert_called_once_with('uuid', 'path',
ctx=None,
force_raw=True,
expected_format=None)
mock_cache.fetch_image.assert_called_once_with(
'uuid', 'path',
ctx=None,
force_raw=True,
expected_format=None,
expected_checksum=None,
expected_checksum_algo=None)
@mock.patch.object(image_cache, 'clean_up_caches', autospec=True)
def test_fetch_images_checksum(self, mock_clean_up_caches):
mock_cache = mock.MagicMock(
spec_set=['fetch_image', 'master_dir'], master_dir='master_dir')
utils.fetch_images(None, mock_cache, [('uuid', 'path')],
force_raw=True,
expected_format='qcow2',
expected_checksum='f00',
expected_checksum_algo='sha256')
mock_clean_up_caches.assert_called_once_with(None, 'master_dir',
[('uuid', 'path')])
mock_cache.fetch_image.assert_called_once_with(
'uuid', 'path',
ctx=None,
force_raw=True,
expected_format='qcow2',
expected_checksum='f00',
expected_checksum_algo='sha256')
@mock.patch.object(image_cache, 'clean_up_caches', autospec=True)
def test_fetch_images_fail(self, mock_clean_up_caches):
@ -2464,7 +2488,9 @@ class TestBuildInstanceInfoForHttpProvisioning(db_base.DbTestCase):
@mock.patch.object(image_service, 'GlanceImageService', autospec=True)
def _test_build_instance_info(self, glance_mock, validate_mock,
image_info={}, expect_raw=False,
expect_format='qcow2'):
expect_format='qcow2',
expect_checksum='fake-sha512',
expect_checksum_algo='sha512'):
glance_mock.return_value.show = mock.MagicMock(spec_set=[],
return_value=image_info)
with task_manager.acquire(
@ -2477,7 +2503,9 @@ class TestBuildInstanceInfoForHttpProvisioning(db_base.DbTestCase):
task.context,
task.node,
force_raw=expect_raw,
expected_format=expect_format)
expected_format=expect_format,
expected_checksum=expect_checksum,
expected_checksum_algo=expect_checksum_algo)
symlink_dir = utils._get_http_image_symlink_dir_path()
symlink_file = utils._get_http_image_symlink_file_path(
self.node.uuid)
@ -2531,7 +2559,8 @@ class TestBuildInstanceInfoForHttpProvisioning(db_base.DbTestCase):
cfg.CONF.set_override('force_raw_images', True)
self.image_info['os_hash_algo'] = 'md5'
image_path, instance_info = self._test_build_instance_info(
image_info=self.image_info, expect_raw=True)
image_info=self.image_info, expect_raw=True,
expect_checksum_algo='md5')
self.assertIsNone(instance_info['image_checksum'])
self.assertEqual(instance_info['image_disk_format'], 'raw')
@ -2543,7 +2572,8 @@ class TestBuildInstanceInfoForHttpProvisioning(db_base.DbTestCase):
self.image_info['os_hash_algo'] = 'md5'
self.image_info['disk_format'] = 'raw'
image_path, instance_info = self._test_build_instance_info(
image_info=self.image_info, expect_raw=True, expect_format='raw')
image_info=self.image_info, expect_raw=True, expect_format='raw',
expect_checksum_algo='md5')
self.assertEqual(instance_info['image_checksum'], 'aa')
self.assertEqual(instance_info['image_disk_format'], 'raw')
@ -2576,7 +2606,9 @@ class TestBuildInstanceInfoForHttpProvisioning(db_base.DbTestCase):
self.assertEqual('raw', info['image_disk_format'])
self.cache_image_mock.assert_called_once_with(
task.context, task.node, force_raw=True,
expected_format=None)
expected_format=None,
expected_checksum='aa',
expected_checksum_algo=None)
self.checksum_mock.assert_called_once_with(
self.fake_path, algorithm='sha256')
validate_href_mock.assert_called_once_with(
@ -2609,7 +2641,9 @@ class TestBuildInstanceInfoForHttpProvisioning(db_base.DbTestCase):
self.assertEqual('fake-checksum', info['image_os_hash_value'])
self.cache_image_mock.assert_called_once_with(
task.context, task.node, force_raw=True,
expected_format=None)
expected_format=None,
expected_checksum='aa',
expected_checksum_algo=None)
self.checksum_mock.assert_called_once_with(
self.fake_path, algorithm='sha256')
validate_href_mock.assert_called_once_with(
@ -2645,7 +2679,9 @@ class TestBuildInstanceInfoForHttpProvisioning(db_base.DbTestCase):
self.assertEqual('fake-checksum', info['image_os_hash_value'])
self.cache_image_mock.assert_called_once_with(
task.context, task.node, force_raw=True,
expected_format='qcow2')
expected_format='qcow2',
expected_checksum='aa',
expected_checksum_algo=None)
self.checksum_mock.assert_called_once_with(
self.fake_path, algorithm='sha256')
validate_href_mock.assert_called_once_with(
@ -2726,7 +2762,9 @@ class TestBuildInstanceInfoForHttpProvisioning(db_base.DbTestCase):
self.assertEqual('fake-checksum', info['image_os_hash_value'])
self.cache_image_mock.assert_called_once_with(
task.context, task.node, force_raw=True,
expected_format=None)
expected_format=None,
expected_checksum='aa',
expected_checksum_algo=None)
self.checksum_mock.assert_called_once_with(
self.fake_path, algorithm='sha256')
validate_href_mock.assert_called_once_with(
@ -2755,7 +2793,6 @@ class TestBuildInstanceInfoForHttpProvisioning(db_base.DbTestCase):
self.context, self.node.uuid, shared=False) as task:
info = utils.build_instance_info_for_deploy(task)
self.assertEqual(expected_url, info['image_url'])
self.assertEqual('aa', info['image_checksum'])
self.assertEqual('raw', info['image_disk_format'])
@ -2763,11 +2800,175 @@ class TestBuildInstanceInfoForHttpProvisioning(db_base.DbTestCase):
self.assertIsNone(info['image_os_hash_value'])
self.cache_image_mock.assert_called_once_with(
task.context, task.node, force_raw=True,
expected_format='raw')
expected_format='raw', expected_checksum='aa',
expected_checksum_algo=None)
self.checksum_mock.assert_not_called()
validate_href_mock.assert_called_once_with(
mock.ANY, expected_url, False)
@mock.patch.object(image_service.HttpImageService, 'get',
autospec=True)
@mock.patch.object(image_service.HttpImageService, 'validate_href',
autospec=True)
def test_build_instance_info_remote_checksum_image(self,
validate_href_mock,
get_mock):
# Test case where we would download both the image and the checksum
# and ultimately convert the image.
get_mock.return_value = 'd8e8fca2dc0f896fd7cb4cb0031ba249'
cfg.CONF.set_override('image_download_source', 'local', group='agent')
i_info = self.node.instance_info
driver_internal_info = self.node.driver_internal_info
i_info['image_source'] = 'http://image-ref'
i_info['image_checksum'] = 'http://image-checksum'
i_info['root_gb'] = 10
i_info['image_disk_format'] = 'qcow2'
driver_internal_info['is_whole_disk_image'] = True
self.node.instance_info = i_info
self.node.driver_internal_info = driver_internal_info
self.node.save()
expected_url = (
'http://172.172.24.10:8080/agent_images/%s' % self.node.uuid)
with task_manager.acquire(
self.context, self.node.uuid, shared=False) as task:
info = utils.build_instance_info_for_deploy(task)
self.assertEqual(expected_url, info['image_url'])
self.assertEqual('raw', info['image_disk_format'])
self.cache_image_mock.assert_called_once_with(
task.context, task.node, force_raw=True,
expected_format='qcow2',
expected_checksum='d8e8fca2dc0f896fd7cb4cb0031ba249',
expected_checksum_algo=None)
self.checksum_mock.assert_called_once_with(
self.fake_path, algorithm='sha256')
validate_href_mock.assert_called_once_with(
mock.ANY, expected_url, False)
get_mock.assert_called_once_with('http://image-checksum')
@mock.patch.object(image_service.HttpImageService, 'get',
autospec=True)
@mock.patch.object(image_service.HttpImageService, 'validate_href',
autospec=True)
def test_build_instance_info_remote_checksum_sha256(self,
validate_href_mock,
get_mock):
# Test case where we would download both the image and the checksum
# and ultimately convert the image.
get_mock.return_value = 'a' * 64 + '\n'
cfg.CONF.set_override('image_download_source', 'local', group='agent')
i_info = self.node.instance_info
driver_internal_info = self.node.driver_internal_info
i_info['image_source'] = 'https://image-ref'
i_info['image_checksum'] = 'https://image-checksum'
i_info['root_gb'] = 10
i_info['image_disk_format'] = 'qcow2'
driver_internal_info['is_whole_disk_image'] = True
self.node.instance_info = i_info
self.node.driver_internal_info = driver_internal_info
self.node.save()
expected_url = (
'http://172.172.24.10:8080/agent_images/%s' % self.node.uuid)
with task_manager.acquire(
self.context, self.node.uuid, shared=False) as task:
info = utils.build_instance_info_for_deploy(task)
self.assertEqual(expected_url, info['image_url'])
self.assertEqual('raw', info['image_disk_format'])
self.cache_image_mock.assert_called_once_with(
task.context, task.node, force_raw=True,
expected_format='qcow2',
expected_checksum='a' * 64,
expected_checksum_algo='sha256')
self.checksum_mock.assert_called_once_with(
self.fake_path, algorithm='sha256')
validate_href_mock.assert_called_once_with(
mock.ANY, expected_url, False)
get_mock.assert_called_once_with('https://image-checksum')
@mock.patch.object(image_service.HttpImageService, 'get',
autospec=True)
@mock.patch.object(image_service.HttpImageService, 'validate_href',
autospec=True)
def test_build_instance_info_remote_checksum_sha512(self,
validate_href_mock,
get_mock):
# Test case where we would download both the image and the checksum
# and ultimately convert the image.
get_mock.return_value = 'a' * 128 + '\n'
cfg.CONF.set_override('image_download_source', 'local', group='agent')
i_info = self.node.instance_info
driver_internal_info = self.node.driver_internal_info
i_info['image_source'] = 'https://image-ref'
i_info['image_checksum'] = 'https://image-checksum'
i_info['root_gb'] = 10
i_info['image_disk_format'] = 'qcow2'
driver_internal_info['is_whole_disk_image'] = True
self.node.instance_info = i_info
self.node.driver_internal_info = driver_internal_info
self.node.save()
expected_url = (
'http://172.172.24.10:8080/agent_images/%s' % self.node.uuid)
with task_manager.acquire(
self.context, self.node.uuid, shared=False) as task:
info = utils.build_instance_info_for_deploy(task)
self.assertEqual(expected_url, info['image_url'])
self.assertEqual('raw', info['image_disk_format'])
self.cache_image_mock.assert_called_once_with(
task.context, task.node, force_raw=True,
expected_format='qcow2',
expected_checksum='a' * 128,
expected_checksum_algo='sha512')
self.checksum_mock.assert_called_once_with(
self.fake_path, algorithm='sha256')
validate_href_mock.assert_called_once_with(
mock.ANY, expected_url, False)
get_mock.assert_called_once_with('https://image-checksum')
@mock.patch.object(checksum_utils, 'get_checksum_from_url',
autospec=True)
@mock.patch.object(image_service.HttpImageService, 'validate_href',
autospec=True)
def test_build_instance_info_md5_not_permitted(
self,
validate_href_mock,
get_from_url_mock):
cfg.CONF.set_override('allow_md5_checksum', False, group='agent')
# Test case where we would download both the image and the checksum
# and ultimately convert the image.
cfg.CONF.set_override('image_download_source', 'local', group='agent')
i_info = self.node.instance_info
driver_internal_info = self.node.driver_internal_info
i_info['image_source'] = 'image-ref'
i_info['image_checksum'] = 'ad606d6a24a2dec982bc2993aaaf9160'
i_info['root_gb'] = 10
i_info['image_disk_format'] = 'qcow2'
driver_internal_info['is_whole_disk_image'] = True
self.node.instance_info = i_info
self.node.driver_internal_info = driver_internal_info
self.node.save()
with task_manager.acquire(
self.context, self.node.uuid, shared=False) as task:
self.assertRaisesRegex(exception.ImageChecksumAlgorithmFailure,
'The requested image checksum algorithm '
'cannot be loaded',
utils.build_instance_info_for_deploy,
task)
self.cache_image_mock.assert_not_called()
self.checksum_mock.assert_not_called()
validate_href_mock.assert_not_called()
get_from_url_mock.assert_not_called()
class TestStorageInterfaceUtils(db_base.DbTestCase):
def setUp(self):

79
ironic/tests/unit/drivers/modules/test_image_cache.py
View File

@ -65,7 +65,8 @@ class TestImageCacheFetch(BaseTest):
self.cache.fetch_image(self.uuid, self.dest_path)
self.assertFalse(mock_download.called)
mock_fetch.assert_called_once_with(
None, self.uuid, self.dest_path, True)
None, self.uuid, self.dest_path, True,
None, None, None)
self.assertFalse(mock_clean_up.called)
mock_image_service.assert_not_called()
@ -82,7 +83,8 @@ class TestImageCacheFetch(BaseTest):
self.uuid, self.dest_path)
self.assertFalse(mock_download.called)
mock_fetch.assert_called_once_with(
None, self.uuid, self.dest_path, True)
None, self.uuid, self.dest_path, True,
None, None, None)
self.assertFalse(mock_clean_up.called)
mock_image_service.assert_not_called()
@ -157,7 +159,8 @@ class TestImageCacheFetch(BaseTest):
mock_download.assert_called_once_with(
self.cache, self.uuid, self.master_path, self.dest_path,
mock_image_service.return_value.show.return_value,
ctx=None, force_raw=True, expected_format=None)
ctx=None, force_raw=True, expected_format=None,
expected_checksum=None, expected_checksum_algo=None)
mock_clean_up.assert_called_once_with(self.cache)
mock_image_service.assert_called_once_with(self.uuid, context=None)
mock_image_service.return_value.show.assert_called_once_with(self.uuid)
@ -179,7 +182,8 @@ class TestImageCacheFetch(BaseTest):
mock_download.assert_called_once_with(
self.cache, self.uuid, self.master_path, self.dest_path,
mock_image_service.return_value.show.return_value,
ctx=None, force_raw=True, expected_format=None)
ctx=None, force_raw=True, expected_format=None,
expected_checksum=None, expected_checksum_algo=None)
mock_clean_up.assert_called_once_with(self.cache)
def test_fetch_image_not_uuid(self, mock_download, mock_clean_up,
@ -192,7 +196,8 @@ class TestImageCacheFetch(BaseTest):
mock_download.assert_called_once_with(
self.cache, href, master_path, self.dest_path,
mock_image_service.return_value.show.return_value,
ctx=None, force_raw=True, expected_format=None)
ctx=None, force_raw=True, expected_format=None,
expected_checksum=None, expected_checksum_algo=None)
self.assertTrue(mock_clean_up.called)
def test_fetch_image_not_uuid_no_force_raw(self, mock_download,
@ -201,11 +206,14 @@ class TestImageCacheFetch(BaseTest):
href = u'http://abc.com/ubuntu.qcow2'
href_converted = str(uuid.uuid5(uuid.NAMESPACE_URL, href))
master_path = os.path.join(self.master_dir, href_converted)
self.cache.fetch_image(href, self.dest_path, force_raw=False)
self.cache.fetch_image(href, self.dest_path, force_raw=False,
expected_checksum='f00',
expected_checksum_algo='sha256')
mock_download.assert_called_once_with(
self.cache, href, master_path, self.dest_path,
mock_image_service.return_value.show.return_value,
ctx=None, force_raw=False, expected_format=None)
ctx=None, force_raw=False, expected_format=None,
expected_checksum='f00', expected_checksum_algo='sha256')
self.assertTrue(mock_clean_up.called)
@ -213,7 +221,8 @@ class TestImageCacheFetch(BaseTest):
class TestImageCacheDownload(BaseTest):
def test__download_image(self, mock_fetch):
def _fake_fetch(ctx, uuid, tmp_path, *args):
def _fake_fetch(ctx, uuid, tmp_path, force_raw, expected_format,
expected_checksum, expected_checksum_algo):
self.assertEqual(self.uuid, uuid)
self.assertNotEqual(self.dest_path, tmp_path)
self.assertNotEqual(os.path.dirname(tmp_path), self.master_dir)
@ -235,7 +244,8 @@ class TestImageCacheDownload(BaseTest):
# Make sure we don't use any parts of the URL anywhere.
url = "http://example.com/image.iso?secret=%s" % ("x" * 1000)
def _fake_fetch(ctx, href, tmp_path, *args):
def _fake_fetch(ctx, href, tmp_path, force_raw, expected_format,
expected_checksum, expected_checksum_algo):
self.assertEqual(url, href)
self.assertNotEqual(self.dest_path, tmp_path)
self.assertNotEqual(os.path.dirname(tmp_path), self.master_dir)
@ -519,7 +529,8 @@ class TestImageCacheCleanUp(base.TestCase):
@mock.patch.object(utils, 'rmtree_without_raise', autospec=True)
@mock.patch.object(image_cache, '_fetch', autospec=True)
def test_temp_images_not_cleaned(self, mock_fetch, mock_rmtree):
def _fake_fetch(ctx, uuid, tmp_path, *args):
def _fake_fetch(ctx, uuid, tmp_path, force_raw, expected_format,
expected_checksum, expected_checksum_algo):
with open(tmp_path, 'w') as fp:
fp.write("TEST" * 10)
@ -773,9 +784,13 @@ class TestFetchCleanup(base.TestCase):
mock_format_inspector.return_value = image_check
mock_show.return_value = {}
mock_size.return_value = 100
image_cache._fetch('fake', 'fake-uuid', '/foo/bar', force_raw=True)
image_cache._fetch('fake', 'fake-uuid', '/foo/bar', force_raw=True,
expected_checksum='1234',
expected_checksum_algo='md5')
mock_fetch.assert_called_once_with('fake', 'fake-uuid',
'/foo/bar.part', force_raw=False)
'/foo/bar.part', force_raw=False,
checksum='1234',
checksum_algo='md5')
mock_clean.assert_called_once_with('/foo', 100)
mock_raw.assert_called_once_with('fake-uuid', '/foo/bar',
'/foo/bar.part')
@ -807,7 +822,8 @@ class TestFetchCleanup(base.TestCase):
mock_size.return_value = 100
image_cache._fetch('fake', 'fake-uuid', '/foo/bar', force_raw=True)
mock_fetch.assert_called_once_with('fake', 'fake-uuid',
'/foo/bar.part', force_raw=False)
'/foo/bar.part', force_raw=False,
checksum=None, checksum_algo=None)
mock_clean.assert_called_once_with('/foo', 100)
mock_raw.assert_called_once_with('fake-uuid', '/foo/bar',
'/foo/bar.part')
@ -837,9 +853,13 @@ class TestFetchCleanup(base.TestCase):
mock_exists.return_value = True
mock_size.return_value = 100
mock_image_show.return_value = {}
image_cache._fetch('fake', 'fake-uuid', '/foo/bar', force_raw=True)
image_cache._fetch('fake', 'fake-uuid', '/foo/bar', force_raw=True,
expected_format=None, expected_checksum='f00',
expected_checksum_algo='sha256')
mock_fetch.assert_called_once_with('fake', 'fake-uuid',
'/foo/bar.part', force_raw=False)
'/foo/bar.part', force_raw=False,
checksum='f00',
checksum_algo='sha256')
mock_clean.assert_called_once_with('/foo', 100)
mock_raw.assert_called_once_with('fake-uuid', '/foo/bar',
'/foo/bar.part')
@ -867,9 +887,13 @@ class TestFetchCleanup(base.TestCase):
image_check.__str__.return_value = 'raw'
image_check.safety_check.return_value = True
mock_format_inspector.return_value = image_check
image_cache._fetch('fake', 'fake-uuid', '/foo/bar', force_raw=True)
image_cache._fetch('fake', 'fake-uuid', '/foo/bar', force_raw=True,
expected_checksum='e00',
expected_checksum_algo='sha256')
mock_fetch.assert_called_once_with('fake', 'fake-uuid',
'/foo/bar.part', force_raw=False)
'/foo/bar.part', force_raw=False,
checksum='e00',
checksum_algo='sha256')
mock_clean.assert_not_called()
mock_size.assert_not_called()
mock_raw.assert_not_called()
@ -897,9 +921,14 @@ class TestFetchCleanup(base.TestCase):
self.assertRaises(exception.InvalidImage,
image_cache._fetch,
'fake', 'fake-uuid',
'/foo/bar', force_raw=True)
'/foo/bar', force_raw=True,
expected_format=None,
expected_checksum='a00',
expected_checksum_algo='sha512')
mock_fetch.assert_called_once_with('fake', 'fake-uuid',
'/foo/bar.part', force_raw=False)
'/foo/bar.part', force_raw=False,
checksum='a00',
checksum_algo='sha512')
mock_clean.assert_not_called()
mock_size.assert_not_called()
mock_raw.assert_not_called()
@ -928,7 +957,8 @@ class TestFetchCleanup(base.TestCase):
'fake', 'fake-uuid',
'/foo/bar', force_raw=True)
mock_fetch.assert_called_once_with('fake', 'fake-uuid',
'/foo/bar.part', force_raw=False)
'/foo/bar.part', force_raw=False,
checksum=None, checksum_algo=None)
mock_clean.assert_not_called()
mock_size.assert_not_called()
mock_raw.assert_not_called()
@ -957,7 +987,8 @@ class TestFetchCleanup(base.TestCase):
image_cache._fetch('fake', 'fake-uuid', '/foo/bar', force_raw=True)
mock_fetch.assert_called_once_with('fake', 'fake-uuid',
'/foo/bar.part', force_raw=False)
'/foo/bar.part', force_raw=False,
checksum=None, checksum_algo=None)
mock_size.assert_has_calls([
mock.call('/foo/bar.part', estimate=False),
mock.call('/foo/bar.part', estimate=True),
@ -994,7 +1025,8 @@ class TestFetchCleanup(base.TestCase):
mock_size.return_value = 100
image_cache._fetch('fake', 'fake-uuid', '/foo/bar', force_raw=True)
mock_fetch.assert_called_once_with('fake', 'fake-uuid',
'/foo/bar.part', force_raw=False)
'/foo/bar.part', force_raw=False,
checksum=None, checksum_algo=None)
mock_clean.assert_not_called()
mock_raw.assert_not_called()
mock_remove.assert_not_called()
@ -1025,7 +1057,8 @@ class TestFetchCleanup(base.TestCase):
mock_size.return_value = 100
image_cache._fetch('fake', 'fake-uuid', '/foo/bar', force_raw=True)
mock_fetch.assert_called_once_with('fake', 'fake-uuid',
'/foo/bar.part', force_raw=False)
'/foo/bar.part', force_raw=False,
checksum=None, checksum_algo=None)
mock_clean.assert_not_called()
mock_raw.assert_not_called()
mock_remove.assert_not_called()

44
releasenotes/notes/checksum-before-conversion-66d273b94fa2ba4d.yaml Normal file
View File

@ -0,0 +1,44 @@
---
security:
- |
An issue in Ironic has been resolved where image checksums would not be
checked prior to the conversion of an image to a ``raw`` format image from
another image format.
With default settings, this normally would not take place, however the
``image_download_source`` option, which is available to be set at a
``node`` level for a single deployment, by default for that baremetal node
in all cases, or via the ``[agent]image_download_source`` configuration
option when set to ``local``. By default, this setting is ``http``.
This was in concert with the ``[DEFAULT]force_raw_images`` when set to
``True``, which caused Ironic to download and convert the file.
In a fully integrated context of Ironic's use in a larger OpenStack
deployment, where images are coming from the Glance image service, the
previous pattern was not problematic. The overall issue was introduced as
a result of the capability to supply, cache, and convert a disk image
provided as a URL by an authenticated user.
Ironic will now validate the user supplied checksum prior to image
conversion on the conductor. This can be disabled using the
``[conductor]disable_file_checksum`` configuration option.
fixes:
- |
Fixes a security issue where Ironic would fail to checksum disk image
files it downloads when Ironic had been requested to download and convert
the image to a raw image format. This required the
``image_download_source`` to be explicitly set to ``local``, which is not
the default.
This fix can be disabled by setting
``[conductor]disable_file_checksum`` to ``True``, however this
option will be removed in new major Ironic releases.
As a result of this, parity has been introduced to align Ironic to
Ironic-Python-Agent's support for checksums used by ``standalone``
users of Ironic. This includes support for remote checksum files to be
supplied by URL, in order to prevent breaking existing users which may
have inadvertently been leveraging the prior code path. This support can
be disabled by setting
``[conductor]disable_support_for_checksum_files`` to ``True``.