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# Copyright 2011 OpenStack Foundation
#
# 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.
"""Disk Config extension."""
from webob import exc
from nova.api.openstack import extensions
from nova.api.openstack import wsgi
from nova.api.openstack import xmlutil
from nova.openstack.common.gettextutils import _
from nova.openstack.common import strutils
ALIAS = 'OS-DCF'
XMLNS_DCF = "http://docs.openstack.org/compute/ext/disk_config/api/v1.1"
API_DISK_CONFIG = "%s:diskConfig" % ALIAS
INTERNAL_DISK_CONFIG = "auto_disk_config"
authorize = extensions.soft_extension_authorizer('compute', 'disk_config')
def disk_config_to_api(value):
return 'AUTO' if value else 'MANUAL'
def disk_config_from_api(value):
if value == 'AUTO':
return True
elif value == 'MANUAL':
return False
else:
msg = _("%s must be either 'MANUAL' or 'AUTO'.") % API_DISK_CONFIG
raise exc.HTTPBadRequest(explanation=msg)
class ImageDiskConfigTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('image')
root.set('{%s}diskConfig' % XMLNS_DCF, API_DISK_CONFIG)
return xmlutil.SlaveTemplate(root, 1, nsmap={ALIAS: XMLNS_DCF})
class ImagesDiskConfigTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('images')
elem = xmlutil.SubTemplateElement(root, 'image', selector='images')
elem.set('{%s}diskConfig' % XMLNS_DCF, API_DISK_CONFIG)
return xmlutil.SlaveTemplate(root, 1, nsmap={ALIAS: XMLNS_DCF})
class ImageDiskConfigController(wsgi.Controller):
def _add_disk_config(self, context, images):
for image in images:
metadata = image['metadata']
if INTERNAL_DISK_CONFIG in metadata:
raw_value = metadata[INTERNAL_DISK_CONFIG]
value = strutils.bool_from_string(raw_value)
image[API_DISK_CONFIG] = disk_config_to_api(value)
@wsgi.extends
def show(self, req, resp_obj, id):
context = req.environ['nova.context']
if 'image' in resp_obj.obj and authorize(context):
resp_obj.attach(xml=ImageDiskConfigTemplate())
image = resp_obj.obj['image']
self._add_disk_config(context, [image])
@wsgi.extends
def detail(self, req, resp_obj):
context = req.environ['nova.context']
if 'images' in resp_obj.obj and authorize(context):
resp_obj.attach(xml=ImagesDiskConfigTemplate())
images = resp_obj.obj['images']
self._add_disk_config(context, images)
class ServerDiskConfigTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('server')
root.set('{%s}diskConfig' % XMLNS_DCF, API_DISK_CONFIG)
return xmlutil.SlaveTemplate(root, 1, nsmap={ALIAS: XMLNS_DCF})
class ServersDiskConfigTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('servers')
elem = xmlutil.SubTemplateElement(root, 'server', selector='servers')
elem.set('{%s}diskConfig' % XMLNS_DCF, API_DISK_CONFIG)
return xmlutil.SlaveTemplate(root, 1, nsmap={ALIAS: XMLNS_DCF})
class ServerDiskConfigController(wsgi.Controller):
def _add_disk_config(self, req, servers):
for server in servers:
db_server = req.get_db_instance(server['id'])
# server['id'] is guaranteed to be in the cache due to
# the core API adding it in its 'show'/'detail' methods.
value = db_server.get(INTERNAL_DISK_CONFIG)
server[API_DISK_CONFIG] = disk_config_to_api(value)
def _show(self, req, resp_obj):
if 'server' in resp_obj.obj:
resp_obj.attach(xml=ServerDiskConfigTemplate())
server = resp_obj.obj['server']
self._add_disk_config(req, [server])
@wsgi.extends
def show(self, req, resp_obj, id):
context = req.environ['nova.context']
if authorize(context):
self._show(req, resp_obj)
@wsgi.extends
def detail(self, req, resp_obj):
context = req.environ['nova.context']
if 'servers' in resp_obj.obj and authorize(context):
resp_obj.attach(xml=ServersDiskConfigTemplate())
servers = resp_obj.obj['servers']
self._add_disk_config(req, servers)
def _set_disk_config(self, dict_):
if API_DISK_CONFIG in dict_:
api_value = dict_[API_DISK_CONFIG]
internal_value = disk_config_from_api(api_value)
dict_[INTERNAL_DISK_CONFIG] = internal_value
@wsgi.extends
def create(self, req, body):
context = req.environ['nova.context']
if authorize(context):
if 'server' in body:
self._set_disk_config(body['server'])
resp_obj = (yield)
self._show(req, resp_obj)
@wsgi.extends
def update(self, req, id, body):
context = req.environ['nova.context']
if authorize(context):
if 'server' in body:
self._set_disk_config(body['server'])
resp_obj = (yield)
self._show(req, resp_obj)
@wsgi.extends(action='rebuild')
def _action_rebuild(self, req, id, body):
context = req.environ['nova.context']
if authorize(context):
self._set_disk_config(body['rebuild'])
resp_obj = (yield)
self._show(req, resp_obj)
@wsgi.extends(action='resize')
def _action_resize(self, req, id, body):
context = req.environ['nova.context']
if authorize(context):
self._set_disk_config(body['resize'])
yield
class Disk_config(extensions.ExtensionDescriptor):
"""Disk Management Extension."""
name = "DiskConfig"
alias = ALIAS
namespace = XMLNS_DCF
updated = "2011-09-27T00:00:00Z"
def get_controller_extensions(self):
servers_extension = extensions.ControllerExtension(
self, 'servers', ServerDiskConfigController())
images_extension = extensions.ControllerExtension(
self, 'images', ImageDiskConfigController())
return [servers_extension, images_extension]
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