Copying from glance

changes/49/107449/1
Flavio Percoco 9 years ago
commit 6afd6df9d4

26
.gitignore vendored

@ -0,0 +1,26 @@
*.pyc
*.swp
*.log
.glance-venv
.venv
.tox
.coverage
cover/*
nosetests.xml
coverage.xml
glance.sqlite
AUTHORS
ChangeLog
build
doc/source/api
dist
*.egg
glance.egg-info
tests.sqlite
glance/versioninfo
# Files created by doc build
doc/source/api
# IDE files
.project
.pydevproject

@ -0,0 +1,176 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.

@ -0,0 +1,4 @@
Glance Store Library
=====================
Glance's stores library

@ -0,0 +1,715 @@
# Copyright 2010-2011 OpenStack Foundation
# All Rights Reserved.
#
# 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 collections
import sys
from oslo.config import cfg
from glance.common import exception
from glance.common import utils
import glance.context
import glance.domain.proxy
from glance.openstack.common import importutils
import glance.openstack.common.log as logging
from glance.store import location
from glance.store import scrubber
LOG = logging.getLogger(__name__)
store_opts = [
cfg.ListOpt('known_stores',
default=[
'glance.store.filesystem.Store',
'glance.store.http.Store',
'glance.store.rbd.Store',
'glance.store.s3.Store',
'glance.store.swift.Store',
'glance.store.sheepdog.Store',
'glance.store.cinder.Store',
],
help=_('List of which store classes and store class locations '
'are currently known to glance at startup.')),
cfg.StrOpt('default_store', default='file',
help=_("Default scheme to use to store image data. The "
"scheme must be registered by one of the stores "
"defined by the 'known_stores' config option.")),
cfg.StrOpt('scrubber_datadir',
default='/var/lib/glance/scrubber',
help=_('Directory that the scrubber will use to track '
'information about what to delete. '
'Make sure this is set in glance-api.conf and '
'glance-scrubber.conf')),
cfg.BoolOpt('delayed_delete', default=False,
help=_('Turn on/off delayed delete.')),
cfg.IntOpt('scrub_time', default=0,
help=_('The amount of time in seconds to delay before '
'performing a delete.')),
]
CONF = cfg.CONF
CONF.register_opts(store_opts)
class BackendException(Exception):
pass
class UnsupportedBackend(BackendException):
pass
class Indexable(object):
"""
Wrapper that allows an iterator or filelike be treated as an indexable
data structure. This is required in the case where the return value from
Store.get() is passed to Store.add() when adding a Copy-From image to a
Store where the client library relies on eventlet GreenSockets, in which
case the data to be written is indexed over.
"""
def __init__(self, wrapped, size):
"""
Initialize the object
:param wrappped: the wrapped iterator or filelike.
:param size: the size of data available
"""
self.wrapped = wrapped
self.size = int(size) if size else (wrapped.len
if hasattr(wrapped, 'len') else 0)
self.cursor = 0
self.chunk = None
def __iter__(self):
"""
Delegate iteration to the wrapped instance.
"""
for self.chunk in self.wrapped:
yield self.chunk
def __getitem__(self, i):
"""
Index into the next chunk (or previous chunk in the case where
the last data returned was not fully consumed).
:param i: a slice-to-the-end
"""
start = i.start if isinstance(i, slice) else i
if start < self.cursor:
return self.chunk[(start - self.cursor):]
self.chunk = self.another()
if self.chunk:
self.cursor += len(self.chunk)
return self.chunk
def another(self):
"""Implemented by subclasses to return the next element"""
raise NotImplementedError
def getvalue(self):
"""
Return entire string value... used in testing
"""
return self.wrapped.getvalue()
def __len__(self):
"""
Length accessor.
"""
return self.size
def _get_store_class(store_entry):
store_cls = None
try:
LOG.debug("Attempting to import store %s", store_entry)
store_cls = importutils.import_class(store_entry)
except exception.NotFound:
raise BackendException('Unable to load store. '
'Could not find a class named %s.'
% store_entry)
return store_cls
def create_stores():
"""
Registers all store modules and all schemes
from the given config. Duplicates are not re-registered.
"""
store_count = 0
store_classes = set()
for store_entry in CONF.known_stores:
store_entry = store_entry.strip()
if not store_entry:
continue
store_cls = _get_store_class(store_entry)
try:
store_instance = store_cls()
except exception.BadStoreConfiguration as e:
LOG.warn(_("%s Skipping store driver.") % unicode(e))
continue
schemes = store_instance.get_schemes()
if not schemes:
raise BackendException('Unable to register store %s. '
'No schemes associated with it.'
% store_cls)
else:
if store_cls not in store_classes:
LOG.debug("Registering store %s with schemes %s",
store_cls, schemes)
store_classes.add(store_cls)
scheme_map = {}
for scheme in schemes:
loc_cls = store_instance.get_store_location_class()
scheme_map[scheme] = {
'store_class': store_cls,
'location_class': loc_cls,
}
location.register_scheme_map(scheme_map)
store_count += 1
else:
LOG.debug("Store %s already registered", store_cls)
return store_count
def verify_default_store():
scheme = cfg.CONF.default_store
context = glance.context.RequestContext()
try:
get_store_from_scheme(context, scheme)
except exception.UnknownScheme:
msg = _("Store for scheme %s not found") % scheme
raise RuntimeError(msg)
def get_known_schemes():
"""Returns list of known schemes"""
return location.SCHEME_TO_CLS_MAP.keys()
def get_store_from_scheme(context, scheme, loc=None):
"""
Given a scheme, return the appropriate store object
for handling that scheme.
"""
if scheme not in location.SCHEME_TO_CLS_MAP:
raise exception.UnknownScheme(scheme=scheme)
scheme_info = location.SCHEME_TO_CLS_MAP[scheme]
store = scheme_info['store_class'](context, loc)
return store
def get_store_from_uri(context, uri, loc=None):
"""
Given a URI, return the store object that would handle
operations on the URI.
:param uri: URI to analyze
"""
scheme = uri[0:uri.find('/') - 1]
store = get_store_from_scheme(context, scheme, loc)
return store
def get_from_backend(context, uri, **kwargs):
"""Yields chunks of data from backend specified by uri"""
loc = location.get_location_from_uri(uri)
store = get_store_from_uri(context, uri, loc)
try:
return store.get(loc)
except NotImplementedError:
raise exception.StoreGetNotSupported
def get_size_from_backend(context, uri):
"""Retrieves image size from backend specified by uri"""
loc = location.get_location_from_uri(uri)
store = get_store_from_uri(context, uri, loc)
return store.get_size(loc)
def delete_from_backend(context, uri, **kwargs):
"""Removes chunks of data from backend specified by uri"""
loc = location.get_location_from_uri(uri)
store = get_store_from_uri(context, uri, loc)
try:
return store.delete(loc)
except NotImplementedError:
raise exception.StoreDeleteNotSupported
def get_store_from_location(uri):
"""
Given a location (assumed to be a URL), attempt to determine
the store from the location. We use here a simple guess that
the scheme of the parsed URL is the store...
:param uri: Location to check for the store
"""
loc = location.get_location_from_uri(uri)
return loc.store_name
def safe_delete_from_backend(context, uri, image_id, **kwargs):
"""Given a uri, delete an image from the store."""
try:
return delete_from_backend(context, uri, **kwargs)
except exception.NotFound:
msg = _('Failed to delete image %s in store from URI')
LOG.warn(msg % image_id)
except exception.StoreDeleteNotSupported as e:
LOG.warn(str(e))
except UnsupportedBackend:
exc_type = sys.exc_info()[0].__name__
msg = (_('Failed to delete image %s from store (%s)') %
(image_id, exc_type))
LOG.error(msg)
def schedule_delayed_delete_from_backend(context, uri, image_id, **kwargs):
"""Given a uri, schedule the deletion of an image location."""
(file_queue, _db_queue) = scrubber.get_scrub_queues()
# NOTE(zhiyan): Defautly ask glance-api store using file based queue.
# In future we can change it using DB based queued instead,
# such as using image location's status to saving pending delete flag
# when that property be added.
file_queue.add_location(image_id, uri)
def delete_image_from_backend(context, store_api, image_id, uri):
if CONF.delayed_delete:
store_api.schedule_delayed_delete_from_backend(context, uri, image_id)
else:
store_api.safe_delete_from_backend(context, uri, image_id)
def check_location_metadata(val, key=''):
if isinstance(val, dict):
for key in val:
check_location_metadata(val[key], key=key)
elif isinstance(val, list):
ndx = 0
for v in val:
check_location_metadata(v, key='%s[%d]' % (key, ndx))
ndx = ndx + 1
elif not isinstance(val, unicode):
raise BackendException(_("The image metadata key %s has an invalid "
"type of %s. Only dict, list, and unicode "
"are supported.") % (key, type(val)))
def store_add_to_backend(image_id, data, size, store):
"""
A wrapper around a call to each stores add() method. This gives glance
a common place to check the output
:param image_id: The image add to which data is added
:param data: The data to be stored
:param size: The length of the data in bytes
:param store: The store to which the data is being added
:return: The url location of the file,
the size amount of data,
the checksum of the data
the storage systems metadata dictionary for the location
"""
(location, size, checksum, metadata) = store.add(image_id, data, size)
if metadata is not None:
if not isinstance(metadata, dict):
msg = (_("The storage driver %s returned invalid metadata %s"
"This must be a dictionary type") %
(str(store), str(metadata)))
LOG.error(msg)
raise BackendException(msg)
try:
check_location_metadata(metadata)
except BackendException as e:
e_msg = (_("A bad metadata structure was returned from the "
"%s storage driver: %s. %s.") %
(str(store), str(metadata), str(e)))
LOG.error(e_msg)
raise BackendException(e_msg)
return (location, size, checksum, metadata)
def add_to_backend(context, scheme, image_id, data, size):
store = get_store_from_scheme(context, scheme)
try:
return store_add_to_backend(image_id, data, size, store)
except NotImplementedError:
raise exception.StoreAddNotSupported
def set_acls(context, location_uri, public=False, read_tenants=[],
write_tenants=[]):
loc = location.get_location_from_uri(location_uri)
scheme = get_store_from_location(location_uri)
store = get_store_from_scheme(context, scheme, loc)
try:
store.set_acls(loc, public=public, read_tenants=read_tenants,
write_tenants=write_tenants)
except NotImplementedError:
LOG.debug(_("Skipping store.set_acls... not implemented."))
class ImageRepoProxy(glance.domain.proxy.Repo):
def __init__(self, image_repo, context, store_api):
self.context = context
self.store_api = store_api
proxy_kwargs = {'context': context, 'store_api': store_api}
super(ImageRepoProxy, self).__init__(image_repo,
item_proxy_class=ImageProxy,
item_proxy_kwargs=proxy_kwargs)
def _set_acls(self, image):
public = image.visibility == 'public'
member_ids = []
if image.locations and not public:
member_repo = image.get_member_repo()
member_ids = [m.member_id for m in member_repo.list()]
for location in image.locations:
self.store_api.set_acls(self.context, location['url'], public,
read_tenants=member_ids)
def add(self, image):
result = super(ImageRepoProxy, self).add(image)
self._set_acls(image)
return result
def save(self, image):
result = super(ImageRepoProxy, self).save(image)
self._set_acls(image)
return result
def _check_location_uri(context, store_api, uri):
"""
Check if an image location uri is valid.
:param context: Glance request context
:param store_api: store API module
:param uri: location's uri string
"""
is_ok = True
try:
size = store_api.get_size_from_backend(context, uri)
# NOTE(zhiyan): Some stores return zero when it catch exception
is_ok = size > 0
except (exception.UnknownScheme, exception.NotFound):
is_ok = False
if not is_ok:
raise exception.BadStoreUri(_('Invalid location: %s') % uri)
def _check_image_location(context, store_api, location):
_check_location_uri(context, store_api, location['url'])
store_api.check_location_metadata(location['metadata'])
def _set_image_size(context, image, locations):
if not image.size:
for location in locations:
size_from_backend = glance.store.get_size_from_backend(
context, location['url'])
if size_from_backend:
# NOTE(flwang): This assumes all locations have the same size
image.size = size_from_backend
break
class ImageFactoryProxy(glance.domain.proxy.ImageFactory):
def __init__(self, factory, context, store_api):
self.context = context
self.store_api = store_api
proxy_kwargs = {'context': context, 'store_api': store_api}
super(ImageFactoryProxy, self).__init__(factory,
proxy_class=ImageProxy,
proxy_kwargs=proxy_kwargs)
def new_image(self, **kwargs):
locations = kwargs.get('locations', [])
for l in locations:
_check_image_location(self.context, self.store_api, l)
if locations.count(l) > 1:
raise exception.DuplicateLocation(location=l['url'])
return super(ImageFactoryProxy, self).new_image(**kwargs)
class StoreLocations(collections.MutableSequence):
"""
The proxy for store location property. It takes responsibility for:
1. Location uri correctness checking when adding a new location.
2. Remove the image data from the store when a location is removed
from an image.
"""
def __init__(self, image_proxy, value):
self.image_proxy = image_proxy
if isinstance(value, list):
self.value = value
else:
self.value = list(value)
def append(self, location):
# NOTE(flaper87): Insert this
# location at the very end of
# the value list.
self.insert(len(self.value), location)
def extend(self, other):
if isinstance(other, StoreLocations):
locations = other.value
else:
locations = list(other)
for location in locations:
self.append(location)
def insert(self, i, location):
_check_image_location(self.image_proxy.context,
self.image_proxy.store_api, location)
if location in self.value:
raise exception.DuplicateLocation(location=location['url'])
self.value.insert(i, location)
_set_image_size(self.image_proxy.context,
self.image_proxy,
[location])
def pop(self, i=-1):
location = self.value.pop(i)
try:
delete_image_from_backend(self.image_proxy.context,
self.image_proxy.store_api,
self.image_proxy.image.image_id,
location['url'])
except Exception:
self.value.insert(i, location)
raise
return location
def count(self, location):
return self.value.count(location)
def index(self, location, *args):
return self.value.index(location, *args)
def remove(self, location):
if self.count(location):
self.pop(self.index(location))
else:
self.value.remove(location)
def reverse(self):
self.value.reverse()
# Mutable sequence, so not hashable
__hash__ = None
def __getitem__(self, i):
return self.value.__getitem__(i)
def __setitem__(self, i, location):
_check_image_location(self.image_proxy.context,
self.image_proxy.store_api, location)
self.value.__setitem__(i, location)
_set_image_size(self.image_proxy.context,
self.image_proxy,
[location])
def __delitem__(self, i):
location = None
try:
location = self.value.__getitem__(i)
except Exception:
return self.value.__delitem__(i)
delete_image_from_backend(self.image_proxy.context,
self.image_proxy.store_api,
self.image_proxy.image.image_id,
location['url'])
self.value.__delitem__(i)
def __delslice__(self, i, j):
i = max(i, 0)
j = max(j, 0)
locations = []
try:
locations = self.value.__getslice__(i, j)
except Exception:
return self.value.__delslice__(i, j)
for location in locations:
delete_image_from_backend(self.image_proxy.context,
self.image_proxy.store_api,
self.image_proxy.image.image_id,
location['url'])
self.value.__delitem__(i)
def __iadd__(self, other):
self.extend(other)
return self
def __contains__(self, location):
return location in self.value
def __len__(self):
return len(self.value)
def __cast(self, other):
if isinstance(other, StoreLocations):
return other.value
else:
return other
def __cmp__(self, other):
return cmp(self.value, self.__cast(other))
def __iter__(self):
return iter(self.value)
def _locations_proxy(target, attr):
"""
Make a location property proxy on the image object.
:param target: the image object on which to add the proxy
:param attr: the property proxy we want to hook
"""
def get_attr(self):
value = getattr(getattr(self, target), attr)
return StoreLocations(self, value)
def set_attr(self, value):
if not isinstance(value, (list, StoreLocations)):
raise exception.BadStoreUri(_('Invalid locations: %s') % value)
ori_value = getattr(getattr(self, target), attr)
if ori_value != value:
# NOTE(zhiyan): Enforced locations list was previously empty list.
if len(ori_value) > 0:
raise exception.Invalid(_('Original locations is not empty: '
'%s') % ori_value)
# NOTE(zhiyan): Check locations are all valid.
for location in value:
_check_image_location(self.context, self.store_api,
location)
if value.count(location) > 1:
raise exception.DuplicateLocation(location=location['url'])
_set_image_size(self.context, getattr(self, target), value)
return setattr(getattr(self, target), attr, list(value))
def del_attr(self):
value = getattr(getattr(self, target), attr)
while len(value):
delete_image_from_backend(self.context, self.store_api,
self.image.image_id, value[0]['url'])
del value[0]
setattr(getattr(self, target), attr, value)
return delattr(getattr(self, target), attr)
return property(get_attr, set_attr, del_attr)
class ImageProxy(glance.domain.proxy.Image):
locations = _locations_proxy('image', 'locations')
def __init__(self, image, context, store_api):
self.image = image
self.context = context
self.store_api = store_api
proxy_kwargs = {
'context': context,
'image': self,
'store_api': store_api,
}
super(ImageProxy, self).__init__(
image, member_repo_proxy_class=ImageMemberRepoProxy,
member_repo_proxy_kwargs=proxy_kwargs)
def delete(self):
self.image.delete()
if self.image.locations:
for location in self.image.locations:
self.store_api.delete_image_from_backend(self.context,
self.store_api,
self.image.image_id,
location['url'])
def set_data(self, data, size=None):
if size is None:
size = 0 # NOTE(markwash): zero -> unknown size
location, size, checksum, loc_meta = self.store_api.add_to_backend(
self.context, CONF.default_store,
self.image.image_id, utils.CooperativeReader(data), size)
self.image.locations = [{'url': location, 'metadata': loc_meta}]
self.image.size = size
self.image.checksum = checksum
self.image.status = 'active'
def get_data(self):
if not self.image.locations:
raise exception.NotFound(_("No image data could be found"))
err = None
for loc in self.image.locations:
try:
data, size = self.store_api.get_from_backend(self.context,
loc['url'])
return data
except Exception as e:
LOG.warn(_('Get image %(id)s data from %(loc)s '
'failed: %(err)s.') % {'id': self.image.image_id,
'loc': loc, 'err': e})
err = e
# tried all locations
LOG.error(_('Glance tried all locations to get data for image %s '
'but all have failed.') % self.image.image_id)
raise err
class ImageMemberRepoProxy(glance.domain.proxy.Repo):
def __init__(self, repo, image, context, store_api):
self.repo = repo
self.image = image
self.context = context
self.store_api = store_api
super(ImageMemberRepoProxy, self).__init__(repo)
def _set_acls(self):
public = self.image.visibility == 'public'
if self.image.locations and not public:
member_ids = [m.member_id for m in self.repo.list()]
for location in self.image.locations:
self.store_api.set_acls(self.context, location['url'], public,
read_tenants=member_ids)
def add(self, member):
super(ImageMemberRepoProxy, self).add(member)
self._set_acls()
def remove(self, member):
super(ImageMemberRepoProxy, self).remove(member)
self._set_acls()

@ -0,0 +1,167 @@
# Copyright 2011 OpenStack Foundation
# Copyright 2012 RedHat Inc.
# All Rights Reserved.
#
# 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.
"""Base class for all storage backends"""
from glance.common import exception
from glance.openstack.common import importutils
import glance.openstack.common.log as logging
from glance.openstack.common import strutils
from glance.openstack.common import units
LOG = logging.getLogger(__name__)
def _exception_to_unicode(exc):
try:
return unicode(exc)
except UnicodeError:
try:
return strutils.safe_decode(str(exc), errors='ignore')
except UnicodeError:
msg = (_("Caught '%(exception)s' exception.") %
{"exception": exc.__class__.__name__})
return strutils.safe_decode(msg, errors='ignore')
class Store(object):
CHUNKSIZE = 16 * units.Mi # 16M
def __init__(self, context=None, location=None):
"""
Initialize the Store
"""
self.store_location_class = None
self.context = context
self.configure()
try:
self.configure_add()
except exception.BadStoreConfiguration as e:
self.add = self.add_disabled
msg = (_(u"Failed to configure store correctly: %s "
"Disabling add method.") % _exception_to_unicode(e))
LOG.warn(msg)
def configure(self):
"""
Configure the Store to use the stored configuration options
Any store that needs special configuration should implement
this method.
"""
pass
def get_schemes(self):
"""
Returns a tuple of schemes which this store can handle.
"""
raise NotImplementedError
def get_store_location_class(self):
"""
Returns the store location class that is used by this store.
"""
if not self.store_location_class:
class_name = "%s.StoreLocation" % (self.__module__)
LOG.debug("Late loading location class %s", class_name)
self.store_location_class = importutils.import_class(class_name)
return self.store_location_class
def configure_add(self):
"""
This is like `configure` except that it's specifically for
configuring the store to accept objects.
If the store was not able to successfully configure
itself, it should raise `exception.BadStoreConfiguration`.
"""
pass
def get(self, location):
"""
Takes a `glance.store.location.Location` object that indicates
where to find the image file, and returns a tuple of generator
(for reading the image file) and image_size
:param location `glance.store.location.Location` object, supplied
from glance.store.location.get_location_from_uri()
:raises `glance.exception.NotFound` if image does not exist
"""
raise NotImplementedError
def get_size(self, location):
"""
Takes a `glance.store.location.Location` object that indicates
where to find the image file, and returns the size
:param location `glance.store.location.Location` object, supplied
from glance.store.location.get_location_from_uri()
:raises `glance.exception.NotFound` if image does not exist
"""
raise NotImplementedError
def add_disabled(self, *args, **kwargs):
"""
Add method that raises an exception because the Store was
not able to be configured properly and therefore the add()
method would error out.
"""
raise exception.StoreAddDisabled
def add(self, image_id, image_file, image_size):
"""
Stores an image file with supplied identifier to the backend
storage system and returns a tuple containing information
about the stored image.
:param image_id: The opaque image identifier
:param image_file: The image data to write, as a file-like object
:param image_size: The size of the image data to write, in bytes
:retval tuple of URL in backing store, bytes written, checksum
and a dictionary with storage system specific information
:raises `glance.common.exception.Duplicate` if the image already
existed
"""
raise NotImplementedError
def delete(self, location):
"""
Takes a `glance.store.location.Location` object that indicates
where to find the image file to delete
:location `glance.store.location.Location` object, supplied
from glance.store.location.get_location_from_uri()
:raises `glance.exception.NotFound` if image does not exist
"""
raise NotImplementedError
def set_acls(self, location, public=False, read_tenants=[],
write_tenants=[]):
"""
Sets the read and write access control list for an image in the
backend store.
:location `glance.store.location.Location` object, supplied
from glance.store.location.get_location_from_uri()
:public A boolean indicating whether the image should be public.
:read_tenants A list of tenant strings which should be granted
read access for an image.
:write_tenants A list of tenant strings which should be granted
write access for an image.
"""
raise NotImplementedError

@ -0,0 +1,182 @@
# 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.
"""Storage backend for Cinder"""
from cinderclient import exceptions as cinder_exception
from cinderclient import service_catalog
from cinderclient.v2 import client as cinderclient
from oslo.config import cfg
from glance.common import exception
from glance.common import utils
import glance.openstack.common.log as logging
from glance.openstack.common import units
import glance.store.base
import glance.store.location
LOG = logging.getLogger(__name__)
cinder_opts = [
cfg.StrOpt('cinder_catalog_info',
default='volume:cinder:publicURL',
help='Info to match when looking for cinder in the service '
'catalog. Format is : separated values of the form: '
'<service_type>:<service_name>:<endpoint_type>'),
cfg.StrOpt('cinder_endpoint_template',
default=None,
help='Override service catalog lookup with template for cinder '
'endpoint e.g. http://localhost:8776/v1/%(project_id)s'),
cfg.StrOpt('os_region_name',
default=None,
help='Region name of this node'),
cfg.StrOpt('cinder_ca_certificates_file',
default=None,
help='Location of ca certicates file to use for cinder client '
'requests.'),
cfg.IntOpt('cinder_http_retries',
default=3,
help='Number of cinderclient retries on failed http calls'),
cfg.BoolOpt('cinder_api_insecure',
default=False,
help='Allow to perform insecure SSL requests to cinder'),
]
CONF = cfg.CONF
CONF.register_opts(cinder_opts)
def get_cinderclient(context):
if CONF.cinder_endpoint_template:
url = CONF.cinder_endpoint_template % context.to_dict()
else:
info = CONF.cinder_catalog_info
service_type, service_name, endpoint_type = info.split(':')
# extract the region if set in configuration
if CONF.os_region_name:
attr = 'region'
filter_value = CONF.os_region_name
else:
attr = None
filter_value = None
# FIXME: the cinderclient ServiceCatalog object is mis-named.
# It actually contains the entire access blob.
# Only needed parts of the service catalog are passed in, see
# nova/context.py.
compat_catalog = {
'access': {'serviceCatalog': context.service_catalog or []}}
sc = service_catalog.ServiceCatalog(compat_catalog)
url = sc.url_for(attr=attr,
filter_value=filter_value,
service_type=service_type,
service_name=service_name,
endpoint_type=endpoint_type)
LOG.debug(_('Cinderclient connection created using URL: %s') % url)
c = cinderclient.Client(context.user,
context.auth_tok,
project_id=context.tenant,
auth_url=url,
insecure=CONF.cinder_api_insecure,
retries=CONF.cinder_http_retries,
cacert=CONF.cinder_ca_certificates_file)
# noauth extracts user_id:project_id from auth_token
c.client.auth_token = context.auth_tok or '%s:%s' % (context.user,
context.tenant)
c.client.management_url = url
return c
class StoreLocation(glance.store.location.StoreLocation):
"""Class describing a Cinder URI"""
def process_specs(self):
self.scheme = self.specs.get('scheme', 'cinder')
self.volume_id = self.specs.get('volume_id')
def get_uri(self):
return "cinder://%s" % self.volume_id
def parse_uri(self, uri):
if not uri.startswith('cinder://'):
reason = _("URI must start with cinder://")
LOG.error(reason)
raise exception.BadStoreUri(uri, reason)
self.scheme = 'cinder'
self.volume_id = uri[9:]
if not utils.is_uuid_like(self.volume_id):
reason = _("URI contains invalid volume ID: %s") % self.volume_id
LOG.error(reason)
raise exception.BadStoreUri(uri, reason)
class Store(glance.store.base.Store):
"""Cinder backend store adapter."""
EXAMPLE_URL = "cinder://volume-id"
def get_schemes(self):
return ('cinder',)
def configure_add(self):
"""
Configure the Store to use the stored configuration options
Any store that needs special configuration should implement
this method. If the store was not able to successfully configure
itself, it should raise `exception.BadStoreConfiguration`
"""
if self.context is None:
reason = _("Cinder storage requires a context.")
raise exception.BadStoreConfiguration(store_name="cinder",
reason=reason)
if self.context.service_catalog is None:
reason = _("Cinder storage requires a service catalog.")
raise exception.BadStoreConfiguration(store_name="cinder",
reason=reason)
def get_size(self, location):
"""
Takes a `glance.store.location.Location` object that indicates
where to find the image file and returns the image size
:param location `glance.store.location.Location` object, supplied
from glance.store.location.get_location_from_uri()
:raises `glance.exception.NotFound` if image does not exist
:rtype int
"""
loc = location.store_location
try:
volume = get_cinderclient(self.context).volumes.get(loc.volume_id)
# GB unit convert to byte
return volume.size * units.Gi
except cinder_exception.NotFound as e:
reason = _("Failed to get image size due to "
"volume can not be found: %s") % self.volume_id
LOG.error(reason)
raise exception.NotFound(reason)
except Exception as e:
LOG.exception(_("Failed to get image size due to "
"internal error: %s") % e)
return 0

@ -0,0 +1,301 @@
# Copyright 2010 OpenStack Foundation
# All Rights Reserved.
#
# 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.
"""
A simple filesystem-backed store
"""
import errno
import hashlib
import os
import urlparse
from oslo.config import cfg
from glance.common import exception
from glance.common import utils
from glance.openstack.common import jsonutils
import glance.openstack.common.log as logging
import glance.store
import glance.store.base
import glance.store.location
LOG = logging.getLogger(__name__)
filesystem_opts = [
cfg.StrOpt('filesystem_store_datadir',
help=_('Directory to which the Filesystem backend '
'store writes images.')),
cfg.StrOpt('filesystem_store_metadata_file',
help=_("The path to a file which contains the "
"metadata to be returned with any location "
"associated with this store. The file must "
"contain a valid JSON dict."))]
CONF = cfg.CONF
CONF.register_opts(filesystem_opts)
class StoreLocation(glance.store.location.StoreLocation):
"""Class describing a Filesystem URI"""
def process_specs(self):
self.scheme = self.specs.get('scheme', 'file')
self.path = self.specs.get('path')
def get_uri(self):
return "file://%s" % self.path
def parse_uri(self, uri):
"""
Parse URLs. This method fixes an issue where credentials specified
in the URL are interpreted differently in Python 2.6.1+ than prior
versions of Python.
"""
pieces = urlparse.urlparse(uri)
assert pieces.scheme in ('file', 'filesystem')
self.scheme = pieces.scheme
path = (pieces.netloc + pieces.path).strip()
if path == '':
reason = _("No path specified in URI: %s") % uri
LOG.debug(reason)
raise exception.BadStoreUri('No path specified')
self.path = path
class ChunkedFile(object):
"""
We send this back to the Glance API server as
something that can iterate over a large file
"""
CHUNKSIZE = 65536
def __init__(self, filepath):
self.filepath = filepath
self.fp = open(self.filepath, 'rb')
def __iter__(self):
"""Return an iterator over the image file"""
try:
if self.fp:
while True:
chunk = self.fp.read(ChunkedFile.CHUNKSIZE)
if chunk:
yield chunk
else:
break
finally:
self.close()
def close(self):
"""Close the internal file pointer"""
if self.fp:
self.fp.close()
self.fp = None
class Store(glance.store.base.Store):
def get_schemes(self):
return ('file', 'filesystem')
def configure_add(self):
"""
Configure the Store to use the stored configuration options
Any store that needs special configuration should implement
this method. If the store was not able to successfully configure
itself, it should raise `exception.BadStoreConfiguration`
"""
self.datadir = CONF.filesystem_store_datadir
if self.datadir is None:
reason = (_("Could not find %s in configuration options.") %
'filesystem_store_datadir')
LOG.error(reason)
raise exception.BadStoreConfiguration(store_name="filesystem",
reason=reason)
if not os.path.exists(self.datadir):
msg = _("Directory to write image files does not exist "
"(%s). Creating.") % self.datadir
LOG.info(msg)
try:
os.makedirs(self.datadir)
except (IOError, OSError):
if os.path.exists(self.datadir):
# NOTE(markwash): If the path now exists, some other
# process must have beat us in the race condition. But it
# doesn't hurt, so we can safely ignore the error.
return
reason = _("Unable to create datadir: %s") % self.datadir
LOG.error(reason)
raise exception.BadStoreConfiguration(store_name="filesystem",
reason=reason)
@staticmethod
def _resolve_location(location):
filepath = location.store_location.path
if not os.path.exists(filepath):
raise exception.NotFound(_("Image file %s not found") % filepath)
filesize = os.path.getsize(filepath)
return filepath, filesize
def _get_metadata(self):
if CONF.filesystem_store_metadata_file is None:
return {}
try:
with open(CONF.filesystem_store_metadata_file, 'r') as fptr:
metadata = jsonutils.load(fptr)
glance.store.check_location_metadata(metadata)
return metadata
except glance.store.BackendException as bee:
LOG.error(_('The JSON in the metadata file %s could not be used: '
'%s An empty dictionary will be returned '
'to the client.')
% (CONF.filesystem_store_metadata_file, str(bee)))
return {}
except IOError as ioe:
LOG.error(_('The path for the metadata file %s could not be '
'opened: %s An empty dictionary will be returned '
'to the client.')
% (CONF.filesystem_store_metadata_file, ioe))
return {}
except Exception as ex:
LOG.exception(_('An error occurred processing the storage systems '
'meta data file: %s. An empty dictionary will be '
'returned to the client.') % str(ex))
return {}
def get(self, location):
"""
Takes a `glance.store.location.Location` object that indicates
where to find the image file, and returns a tuple of generator
(for reading the image file) and image_size
:param location `glance.store.location.Location` object, supplied
from glance.store.location.get_location_from_uri()
:raises `glance.exception.NotFound` if image does not exist
"""
filepath, filesize = self._resolve_location(location)
msg = _("Found image at %s. Returning in ChunkedFile.") % filepath
LOG.debug(msg)
return (ChunkedFile(filepath), filesize)
def get_size(self, location):
"""
Takes a `glance.store.location.Location` object that indicates
where to find the image file and returns the image size
:param location `glance.store.location.Location` object, supplied
from glance.store.location.get_location_from_uri()
:raises `glance.exception.NotFound` if image does not exist
:rtype int
"""
filepath, filesize = self._resolve_location(location)
msg = _("Found image at %s.") % filepath
LOG.debug(msg)
return filesize
def delete(self, location):
"""
Takes a `glance.store.location.Location` object that indicates
where to find the image file to delete
:location `glance.store.location.Location` object, supplied
from glance.store.location.get_location_from_uri()
:raises NotFound if image does not exist
:raises Forbidden if cannot delete because of permissions
"""
loc = location.store_location
fn = loc.path
if os.path.exists(fn):
try: