def get_data(self, offset=0, chunk_size=None):
if not self.image.locations:
# NOTE(mclaren): This is the only set of arguments
# which work with this exception currently, see:
# https://bugs.launchpad.net/glance-store/+bug/1501443
# When the above glance_store bug is fixed we can
# add a msg as usual.
raise store.NotFound(image=None)
err = None
for loc in self.image.locations:
try:
#自backend中取数据
data, size = self.store_api.get_from_backend(
loc['url'],
offset=offset,
chunk_size=chunk_size,
context=self.context)
return data
except Exception as e:
LOG.warn(
_LW('Get image %(id)s data failed: '
'%(err)s.') % {
'id': self.image.image_id,
'err': encodeutils.exception_to_unicode(e)
})
err = e
# tried all locations
LOG.error(
_LE('Glance tried all active locations to get data for '
'image %s but all have failed.') % self.image.image_id)
raise err
def get_data(self, offset=0, chunk_size=None):
if not self.image.locations:
raise store.NotFound(_("No image data could be found"))
err = None
for loc in self.image.locations:
try:
data, size = self.store_api.get_from_backend(
loc['url'],
offset=offset,
chunk_size=chunk_size,
context=self.context)
return data
except Exception as e:
LOG.warn(
_('Get image %(id)s data failed: '
'%(err)s.') % {
'id': self.image.image_id,
'err': encodeutils.exception_to_unicode(e)
})
err = e
# tried all locations
LOG.error(
_LE('Glance tried all active locations to get data for '
'image %s but all have failed.') % self.image.image_id)
raise err
def get_from_backend(self, location, offset=0,
chunk_size=None, context=None):
try:
scheme = location[:location.find('/') - 1]
if scheme == 'unknown':
raise store.UnknownScheme(scheme=scheme)
return self.data[location]
except KeyError:
raise store.NotFound(image=location)
def test_store_delete_notfound_exception(self, mock_image_get):
# While scrubbing image data, NotFound exception is ignored and image
# scrubbing succeeds
uri = 'file://some/path/%s' % uuid.uuid4()
id = 'helloworldid'
ex = glance_store.NotFound(message='random')
scrub = scrubber.Scrubber(glance_store)
with patch.object(glance_store, "delete_from_backend") as _mock_delete:
_mock_delete.side_effect = ex
scrub._scrub_image(id, [(id, '-', uri)])
def test_download_failure_with_valid_content_range(self):
with mock.patch.object(glance.api.policy.ImageProxy,
'get_data') as mock_get_data:
mock_get_data.side_effect = glance_store.NotFound(image="image")
request = wsgi.Request.blank('/')
request.environ = {}
request.headers['Content-Range'] = 'bytes %s-%s/3' % (1, 2)
response = webob.Response()
response.request = request
image = FakeImage(size=3, data=[b'Z', b'Z', b'Z'])
image.get_data = mock_get_data
self.assertRaises(webob.exc.HTTPNoContent, self.serializer.download,
response, image)
def test_store_delete_notfound_exception(self, mock_image_get):
# While scrubbing image data, NotFound exception is ignored and image
# scrubbing succeeds
uri = 'file://some/path/%s' % uuid.uuid4()
id = 'helloworldid'
ex = glance_store.NotFound(message='random')
scrub = scrubber.Scrubber(glance_store)
self.mox.StubOutWithMock(glance_store, "delete_from_backend")
glance_store.delete_from_backend(uri, mox.IgnoreArg()).AndRaise(ex)
self.mox.ReplayAll()
scrub._scrub_image(id, [(id, '-', uri)])
self.mox.VerifyAll()
def test_store_delete_notfound_exception(self):
# While scrubbing image data, NotFound exception is ignored and image
# scrubbing succeeds
uri = 'file://some/path/%s' % uuid.uuid4()
id = 'helloworldid'
ex = glance_store.NotFound(message='random')
scrub = scrubber.Scrubber(glance_store)
scrub.registry = self.mox.CreateMockAnything()
scrub.registry.get_image(id).AndReturn({'status': 'pending_delete'})
scrub.registry.update_image(id, {'status': 'deleted'})
self.mox.StubOutWithMock(glance_store, "delete_from_backend")
glance_store.delete_from_backend(uri, mox.IgnoreArg()).AndRaise(ex)
self.mox.ReplayAll()
scrub._scrub_image(id, [(id, '-', uri)])
self.mox.VerifyAll()
def test_download_no_content(self):
"""Test image download returns HTTPNoContent
Make sure that serializer returns 204 no content error in case of
image data is not available at specified location.
"""
with mock.patch.object(xmonitor.api.policy.ImageProxy,
'get_data') as mock_get_data:
mock_get_data.side_effect = glance_store.NotFound(image="image")
request = wsgi.Request.blank('/')
response = webob.Response()
response.request = request
image = FakeImage(size=3, data=iter('ZZZ'))
image.get_data = mock_get_data
self.assertRaises(webob.exc.HTTPNoContent,
self.serializer.download, response, image)
def fake_save(self):
raise glance_store.NotFound()
def fake_save(self, from_state=None):
raise glance_store.NotFound()
def test_non_unicode_error_msg(self):
exc = glance_store.NotFound(str('test'))
self.assertIsInstance(encodeutils.exception_to_unicode(exc),
six.text_type)
def test_exception_with_kwargs(self):
msg = glance_store.NotFound('Message: %(foo)s', foo='bar')
self.assertIn('Message: bar', encodeutils.exception_to_unicode(msg))
def test_exception_with_message(self):
msg = glance_store.NotFound('Some message')
self.assertIn('Some message', encodeutils.exception_to_unicode(msg))
def test_exception_not_found_with_image(self):
msg = glance_store.NotFound(image='123')
self.assertIn('Image 123 not found',
encodeutils.exception_to_unicode(msg))
def test_exception_no_message(self):
msg = glance_store.NotFound()
self.assertIn('Image %(image)s not found',
encodeutils.exception_to_unicode(msg))
