deb-horizon/openstack_dashboard/api/glance.py
Paul Karikh 97945b5f6a Wrap api calls with tracing decorators
Since Horizon is going to be the first (or, one of the first)
OpenStack component using the new MongoDB driver, it won't be able to
retrieve traces made by other components using MongoDB driver (which
it should use because Ceilometer driver was too slow) for a
while. This means that Horizon itself is responsible for tracing the
rendering of its pages down to the layer where the flow of control
leaves Horizon domain. So, a lot of api wrappers in
openstack_dashboard.api are augmented with tracing decorator to
achieve this goal.

Co-Authored-By: Timur Sufiev <tsufiev@mirantis.com>
Implements-blueprint: openstack-profiler-at-developer-dashboard
Change-Id: Ib36692f0e9e68ed7fa0cd47919ba6581c9c8ab57
2016-12-01 19:31:10 +00:00

691 lines
24 KiB
Python

# Copyright 2012 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# Copyright 2012 Nebula, 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 __future__ import absolute_import
import collections
import itertools
import json
import logging
import os
from django.conf import settings
from django.core.files.uploadedfile import InMemoryUploadedFile
from django.core.files.uploadedfile import SimpleUploadedFile
from django.core.files.uploadedfile import TemporaryUploadedFile
import glanceclient as glance_client
import six
from six.moves import _thread as thread
from horizon.utils import functions as utils
from horizon.utils.memoized import memoized # noqa
from openstack_dashboard.api import base
from openstack_dashboard.contrib.developer.profiler import api as profiler
LOG = logging.getLogger(__name__)
VERSIONS = base.APIVersionManager("image", preferred_version=2)
try:
from glanceclient.v2 import client as glance_client_v2
VERSIONS.load_supported_version(2, {"client": glance_client_v2,
"version": 2})
except ImportError:
pass
try:
from glanceclient.v1 import client as glance_client_v1
VERSIONS.load_supported_version(1, {"client": glance_client_v1,
"version": 1})
except ImportError:
pass
class Image(base.APIResourceWrapper):
_attrs = {"architecture", "container_format", "disk_format", "created_at",
"owner", "size", "id", "status", "updated_at", "checksum",
"visibility", "name", "is_public", "protected", "min_disk",
"min_ram"}
_ext_attrs = {"file", "locations", "schema", "tags", "virtual_size",
"kernel_id", "ramdisk_id", "image_url"}
def __init__(self, apiresource):
super(Image, self).__init__(apiresource)
def __getattribute__(self, attr):
# Because Glance v2 treats custom properties as normal
# attributes, we need to be more flexible than the resource
# wrappers usually allow. In v1 they were defined under a
# "properties" attribute.
if VERSIONS.active >= 2 and attr == "properties":
return {k: v for (k, v) in self._apiresource.items()
if self.property_visible(k)}
try:
return object.__getattribute__(self, attr)
except AttributeError:
return getattr(self._apiresource, attr)
@property
def name(self):
return getattr(self._apiresource, 'name', None)
@property
def size(self):
image_size = getattr(self._apiresource, 'size', 0)
if image_size is None:
return 0
return image_size
@size.setter
def size(self, value):
self._apiresource.size = value
@property
def is_public(self):
# Glance v2 no longer has a 'is_public' attribute, but uses a
# 'visibility' attribute instead.
return (getattr(self._apiresource, 'is_public', None) or
getattr(self._apiresource, 'visibility', None) == "public")
def property_visible(self, prop_name, show_ext_attrs=False):
if show_ext_attrs:
return prop_name not in self._attrs
else:
return prop_name not in (self._attrs | self._ext_attrs)
def to_dict(self, show_ext_attrs=False):
# When using v1 Image objects (including when running unit tests
# for v2), self._apiresource is not iterable. In that case,
# the properties are included in the apiresource dict, so
# just return that dict.
if not isinstance(self._apiresource, collections.Iterable):
return self._apiresource.to_dict()
image_dict = super(Image, self).to_dict()
image_dict['is_public'] = self.is_public
image_dict['properties'] = {
k: self._apiresource[k] for k in self._apiresource
if self.property_visible(k, show_ext_attrs=show_ext_attrs)}
return image_dict
def __eq__(self, other_image):
return self._apiresource == other_image._apiresource
def __ne__(self, other_image):
return not self.__eq__(other_image)
@memoized
def glanceclient(request, version=None):
api_version = VERSIONS.get_active_version()
url = base.url_for(request, 'image')
insecure = getattr(settings, 'OPENSTACK_SSL_NO_VERIFY', False)
cacert = getattr(settings, 'OPENSTACK_SSL_CACERT', None)
# TODO(jpichon): Temporarily keep both till we update the API calls
# to stop hardcoding a version in this file. Once that's done we
# can get rid of the deprecated 'version' parameter.
if version is None:
return api_version['client'].Client(url, token=request.user.token.id,
insecure=insecure, cacert=cacert)
else:
return glance_client.Client(version, url, token=request.user.token.id,
insecure=insecure, cacert=cacert)
# Note: Glance is adding more than just public and private in Newton or later
PUBLIC_TO_VISIBILITY_MAP = {
None: None,
True: 'public',
False: 'private'
}
def _normalize_is_public_filter(filters):
if not filters:
return
if VERSIONS.active >= 2:
if 'is_public' in filters:
visibility = PUBLIC_TO_VISIBILITY_MAP[filters['is_public']]
del filters['is_public']
if visibility is not None:
filters['visibility'] = visibility
elif 'visibility' in filters:
filters['is_public'] = (
getattr(filters, 'visibility', None) == "public")
del filter['visibility']
def _normalize_list_input(filters, **kwargs):
_normalize_is_public_filter(filters)
if VERSIONS.active < 2:
# Glance v1 client processes some keywords specifically.
# Others, it just takes as a nested dict called filters.
# This results in the following being passed into the glance client:
# {
# 'is_public': u'true',
# 'sort_key': u'name',
# 'sort_dir': u'asc',
# 'filters': {
# u'min_disk': u'0',
# u'name': u'mysql',
# 'properties': {
# u'os_shutdown_timeout': u'1'
# }
# }
# }
v1_keywords = ['page_size', 'limit', 'sort_dir', 'sort_key', 'marker',
'is_public', 'return_req_id', 'paginate']
filters = {}
properties = {}
for key, value in iter(kwargs.items()):
if key in v1_keywords:
continue
else:
filters[key] = value
del kwargs[key]
if properties:
filters['properties'] = properties
if filters:
kwargs['filters'] = filters
@profiler.trace
def image_delete(request, image_id):
return glanceclient(request).images.delete(image_id)
@profiler.trace
def image_get(request, image_id):
"""Returns an Image object populated with metadata for image
with supplied identifier.
"""
image = glanceclient(request).images.get(image_id)
return Image(image)
@profiler.trace
def image_list_detailed(request, marker=None, sort_dir='desc',
sort_key='created_at', filters=None, paginate=False,
reversed_order=False, **kwargs):
"""Thin layer above glanceclient, for handling pagination issues.
It provides iterating both forward and backward on top of ascetic
OpenStack pagination API - which natively supports only iterating forward
through the entries. Thus in order to retrieve list of objects at previous
page, a request with the reverse entries order had to be made to Glance,
using the first object id on current page as the marker - restoring
the original items ordering before sending them back to the UI.
:param request:
The request object coming from browser to be passed further into
Glance service.
:param marker:
The id of an object which defines a starting point of a query sent to
Glance service.
:param sort_dir:
The direction by which the resulting image list throughout all pages
(if pagination is enabled) will be sorted. Could be either 'asc'
(ascending) or 'desc' (descending), defaults to 'desc'.
:param sort_key:
The name of key by by which the resulting image list throughout all
pages (if pagination is enabled) will be sorted. Defaults to
'created_at'.
:param filters:
A dictionary of filters passed as is to Glance service.
:param paginate:
Whether the pagination is enabled. If it is, then the number of
entries on a single page of images table is limited to the specific
number stored in browser cookies.
:param reversed_order:
Set this flag to True when it's necessary to get a reversed list of
images from Glance (used for navigating the images list back in UI).
"""
limit = getattr(settings, 'API_RESULT_LIMIT', 1000)
page_size = utils.get_page_size(request)
if paginate:
request_size = page_size + 1
else:
request_size = limit
_normalize_list_input(filters, **kwargs)
kwargs = {'filters': filters or {}}
if marker:
kwargs['marker'] = marker
kwargs['sort_key'] = sort_key
if not reversed_order:
kwargs['sort_dir'] = sort_dir
else:
kwargs['sort_dir'] = 'desc' if sort_dir == 'asc' else 'asc'
images_iter = glanceclient(request).images.list(page_size=request_size,
limit=limit,
**kwargs)
has_prev_data = False
has_more_data = False
if paginate:
images = list(itertools.islice(images_iter, request_size))
# first and middle page condition
if len(images) > page_size:
images.pop(-1)
has_more_data = True
# middle page condition
if marker is not None:
has_prev_data = True
# first page condition when reached via prev back
elif reversed_order and marker is not None:
has_more_data = True
# last page condition
elif marker is not None:
has_prev_data = True
# restore the original ordering here
if reversed_order:
images = sorted(images, key=lambda image:
(getattr(image, sort_key) or '').lower(),
reverse=(sort_dir == 'desc'))
else:
images = list(images_iter)
# TODO(jpichon): Do it better
wrapped_images = []
for image in images:
wrapped_images.append(Image(image))
return wrapped_images, has_more_data, has_prev_data
@profiler.trace
def image_update(request, image_id, **kwargs):
image_data = kwargs.get('data', None)
try:
# Horizon doesn't support purging image properties. Make sure we don't
# unintentionally remove properties when using v1. We don't need a
# similar setting for v2 because you have to specify which properties
# to remove, and the default is nothing gets removed.
if VERSIONS.active < 2:
kwargs['purge_props'] = False
return Image(glanceclient(request).images.update(
image_id, **kwargs))
finally:
if image_data:
try:
os.remove(image_data.file.name)
except Exception as e:
filename = str(image_data.file)
if hasattr(image_data.file, 'name'):
filename = image_data.file.name
msg = (('Failed to remove temporary image file '
'%(file)s (%(e)s)') %
dict(file=filename, e=str(e)))
LOG.warning(msg)
def get_image_upload_mode():
if getattr(settings, 'HORIZON_IMAGES_ALLOW_UPLOAD', None) is False:
return 'off'
mode = getattr(settings, 'HORIZON_IMAGES_UPLOAD_MODE', 'legacy')
if mode not in ('off', 'legacy', 'direct'):
LOG.warning('HORIZON_IMAGES_UPLOAD_MODE has an unrecognized value of '
'"%s", reverting to default "legacy" value' % mode)
mode = 'legacy'
return mode
class ExternallyUploadedImage(Image):
def __init__(self, apiresource, request):
super(ExternallyUploadedImage, self).__init__(apiresource)
image_endpoint = base.url_for(request, 'image')
if VERSIONS.active >= 2:
upload_template = "%s/v2/images/%s/file"
else:
upload_template = "%s/v1/images/%s"
self._url = upload_template % (image_endpoint, self.id)
self._token_id = request.user.token.id
def to_dict(self):
base_dict = super(ExternallyUploadedImage, self).to_dict()
base_dict.update({
'upload_url': self._url,
'token_id': self._token_id
})
return base_dict
@property
def upload_url(self):
return self._url
@property
def token_id(self):
return self._token_id
@profiler.trace
def image_create(request, **kwargs):
"""Create image.
:param kwargs:
* copy_from: URL from which Glance server should immediately copy
the data and store it in its configured image store.
* data: Form data posted from client.
* location: URL where the data for this image already resides.
In the case of 'copy_from' and 'location', the Glance server
will give us a immediate response from create and handle the data
asynchronously.
In the case of 'data' the process of uploading the data may take
some time and is handed off to a separate thread.
"""
data = kwargs.pop('data', None)
location = None
if VERSIONS.active >= 2:
location = kwargs.pop('location', None)
image = glanceclient(request).images.create(**kwargs)
if location is not None:
glanceclient(request).images.add_location(image.id, location, {})
if data:
if isinstance(data, six.string_types):
# The image data is meant to be uploaded externally, return a
# special wrapper to bypass the web server in a subsequent upload
return ExternallyUploadedImage(image, request)
elif isinstance(data, TemporaryUploadedFile):
# Hack to fool Django, so we can keep file open in the new thread.
data.file.close_called = True
elif isinstance(data, InMemoryUploadedFile):
# Clone a new file for InMemeoryUploadedFile.
# Because the old one will be closed by Django.
data = SimpleUploadedFile(data.name,
data.read(),
data.content_type)
if VERSIONS.active < 2:
thread.start_new_thread(image_update,
(request, image.id),
{'data': data})
else:
def upload():
return glanceclient(request).images.upload(image.id, data)
thread.start_new_thread(upload, ())
return Image(image)
@profiler.trace
def image_update_properties(request, image_id, remove_props=None, **kwargs):
"""Add or update a custom property of an image."""
return glanceclient(request, '2').images.update(image_id,
remove_props,
**kwargs)
@profiler.trace
def image_delete_properties(request, image_id, keys):
"""Delete custom properties for an image."""
return glanceclient(request, '2').images.update(image_id, keys)
class BaseGlanceMetadefAPIResourceWrapper(base.APIResourceWrapper):
@property
def description(self):
return (getattr(self._apiresource, 'description', None) or
getattr(self._apiresource, 'display_name', None))
def as_json(self, indent=4):
result = collections.OrderedDict()
for attr in self._attrs:
if hasattr(self, attr):
result[attr] = getattr(self, attr)
return json.dumps(result, indent=indent)
def to_dict(self):
return self._apiresource
class Namespace(BaseGlanceMetadefAPIResourceWrapper):
_attrs = ['namespace', 'display_name', 'description',
'resource_type_associations', 'visibility', 'protected',
'created_at', 'updated_at', 'properties', 'objects']
@property
def resource_type_names(self):
result = [resource_type['name'] for resource_type in
getattr(self._apiresource, 'resource_type_associations')]
return sorted(result)
@property
def public(self):
if getattr(self._apiresource, 'visibility') == 'public':
return True
else:
return False
def filter_properties_target(namespaces_iter,
resource_types,
properties_target):
"""Filter metadata namespaces based on the given resource types and
properties target.
:param namespaces_iter: Metadata namespaces iterable.
:param resource_types: List of resource type names.
:param properties_target: Name of the properties target.
"""
def filter_namespace(namespace):
for asn in namespace.get('resource_type_associations'):
if (asn.get('name') in resource_types and
asn.get('properties_target') == properties_target):
return True
return False
return filter(filter_namespace, namespaces_iter)
@memoized
def metadefs_namespace_get(request, namespace, resource_type=None, wrap=False):
namespace = glanceclient(request, '2').\
metadefs_namespace.get(namespace, resource_type=resource_type)
# There were problems with using the wrapper class in
# nested json serialization. So sometimes, it is not desirable
# to wrap.
if wrap:
return Namespace(namespace)
else:
return namespace
@profiler.trace
def metadefs_namespace_list(request,
filters=None,
sort_dir='asc',
sort_key='namespace',
marker=None,
paginate=False):
"""Retrieve a listing of Namespaces
:param paginate: If true will perform pagination based on settings.
:param marker: Specifies the namespace of the last-seen namespace.
The typical pattern of limit and marker is to make an
initial limited request and then to use the last
namespace from the response as the marker parameter
in a subsequent limited request. With paginate, limit
is automatically set.
:param sort_dir: The sort direction ('asc' or 'desc').
:param sort_key: The field to sort on (for example, 'created_at'). Default
is namespace. The way base namespaces are loaded into glance
typically at first deployment is done in a single transaction
giving them a potentially unpredictable sort result when using
create_at.
:param filters: specifies addition fields to filter on such as
resource_types.
:returns A tuple of three values:
1) Current page results
2) A boolean of whether or not there are previous page(s).
3) A boolean of whether or not there are more page(s).
"""
# Listing namespaces requires the v2 API. If not supported we return an
# empty array so callers don't need to worry about version checking.
if get_version() < 2:
return [], False, False
if filters is None:
filters = {}
limit = getattr(settings, 'API_RESULT_LIMIT', 1000)
page_size = utils.get_page_size(request)
if paginate:
request_size = page_size + 1
else:
request_size = limit
kwargs = {'filters': filters}
if marker:
kwargs['marker'] = marker
kwargs['sort_dir'] = sort_dir
kwargs['sort_key'] = sort_key
namespaces_iter = glanceclient(request, '2').metadefs_namespace.list(
page_size=request_size, limit=limit, **kwargs)
# Filter the namespaces based on the provided properties_target since this
# is not supported by the metadata namespaces API.
resource_types = filters.get('resource_types')
properties_target = filters.get('properties_target')
if resource_types and properties_target:
namespaces_iter = filter_properties_target(namespaces_iter,
resource_types,
properties_target)
has_prev_data = False
has_more_data = False
if paginate:
namespaces = list(itertools.islice(namespaces_iter, request_size))
# first and middle page condition
if len(namespaces) > page_size:
namespaces.pop(-1)
has_more_data = True
# middle page condition
if marker is not None:
has_prev_data = True
# first page condition when reached via prev back
elif sort_dir == 'desc' and marker is not None:
has_more_data = True
# last page condition
elif marker is not None:
has_prev_data = True
else:
namespaces = list(namespaces_iter)
namespaces = [Namespace(namespace) for namespace in namespaces]
return namespaces, has_more_data, has_prev_data
@profiler.trace
def metadefs_namespace_full_list(request, resource_type, filters=None,
*args, **kwargs):
filters = filters or {}
filters['resource_types'] = [resource_type]
namespaces, has_more_data, has_prev_data = metadefs_namespace_list(
request, filters, *args, **kwargs
)
return [
metadefs_namespace_get(request, x.namespace, resource_type)
for x in namespaces
], has_more_data, has_prev_data
@profiler.trace
def metadefs_namespace_create(request, namespace):
return glanceclient(request, '2').metadefs_namespace.create(**namespace)
@profiler.trace
def metadefs_namespace_update(request, namespace_name, **properties):
return glanceclient(request, '2').metadefs_namespace.update(
namespace_name,
**properties)
@profiler.trace
def metadefs_namespace_delete(request, namespace_name):
return glanceclient(request, '2').metadefs_namespace.delete(namespace_name)
@profiler.trace
def metadefs_resource_types_list(request):
# Listing Resource Types requires the v2 API. If not supported we return
# an empty array so callers don't need to worry about version checking.
if get_version() < 2:
return []
else:
return glanceclient(request, '2').metadefs_resource_type.list()
@profiler.trace
def metadefs_namespace_resource_types(request, namespace_name):
resource_types = glanceclient(request, '2').metadefs_resource_type.get(
namespace_name)
# metadefs_resource_type.get() returns generator, converting it to list
return list(resource_types)
@profiler.trace
def metadefs_namespace_add_resource_type(request,
namespace_name,
resource_type):
return glanceclient(request, '2').metadefs_resource_type.associate(
namespace_name, **resource_type)
@profiler.trace
def metadefs_namespace_remove_resource_type(request,
namespace_name,
resource_type_name):
glanceclient(request, '2').metadefs_resource_type.deassociate(
namespace_name, resource_type_name)
def get_version():
return VERSIONS.active