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OpenStack Study: images.py**** CubicPower OpenStack Study ****
# Copyright 2010-2011 OpenStack Foundation # Copyright 2013 IBM Corp. # 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. from nova.api.openstack import common from nova.image import glance
**** CubicPower OpenStack Study **** class ViewBuilder(common.ViewBuilder): _collection_name = "images"
**** CubicPower OpenStack Study **** def basic(self, request, image): """Return a dictionary with basic image attributes.""" return { "image": { "id": image.get("id"), "name": image.get("name"), "links": self._get_links(request, image["id"], self._collection_name), }, }
**** CubicPower OpenStack Study **** def show(self, request, image): """Return a dictionary with image details.""" image_dict = { "id": image.get("id"), "name": image.get("name"), "minRam": int(image.get("min_ram") or 0), "minDisk": int(image.get("min_disk") or 0), "metadata": image.get("properties", {}), "created": self._format_date(image.get("created_at")), "updated": self._format_date(image.get("updated_at")), "status": self._get_status(image), "progress": self._get_progress(image), "links": self._get_links(request, image["id"], self._collection_name), } instance_uuid = image.get("properties", {}).get("instance_uuid") if instance_uuid is not None: server_ref = self._get_href_link(request, instance_uuid, 'servers') image_dict["server"] = { "id": instance_uuid, "links": [{ "rel": "self", "href": server_ref, }, { "rel": "bookmark", "href": self._get_bookmark_link(request, instance_uuid, 'servers'), }], } return dict(image=image_dict)
**** CubicPower OpenStack Study **** def detail(self, request, images): """Show a list of images with details.""" list_func = self.show return self._list_view(list_func, request, images)
**** CubicPower OpenStack Study **** def index(self, request, images): """Show a list of images with basic attributes.""" list_func = self.basic return self._list_view(list_func, request, images)
**** CubicPower OpenStack Study **** def _list_view(self, list_func, request, images): """Provide a view for a list of images.""" image_list = [list_func(request, image)["image"] for image in images] images_links = self._get_collection_links(request, images, self._collection_name) images_dict = dict(images=image_list) if images_links: images_dict["images_links"] = images_links return images_dict
**** CubicPower OpenStack Study **** def _get_links(self, request, identifier, collection_name): """Return a list of links for this image.""" return [{ "rel": "self", "href": self._get_href_link(request, identifier, collection_name), }, { "rel": "bookmark", "href": self._get_bookmark_link(request, identifier, collection_name), }, { "rel": "alternate", "type": "application/vnd.openstack.image", "href": self._get_alternate_link(request, identifier), }]
**** CubicPower OpenStack Study **** def _get_alternate_link(self, request, identifier): """Create an alternate link for a specific image id.""" glance_url = glance.generate_glance_url() glance_url = self._update_glance_link_prefix(glance_url) return '/'.join([glance_url, request.environ["nova.context"].project_id, self._collection_name, str(identifier)]) @staticmethod
**** CubicPower OpenStack Study **** def _format_date(date_string): """Return standard format for given date.""" if date_string is not None: return date_string.strftime('%Y-%m-%dT%H:%M:%SZ') @staticmethod
**** CubicPower OpenStack Study **** def _get_status(image): """Update the status field to standardize format.""" return { 'active': 'ACTIVE', 'queued': 'SAVING', 'saving': 'SAVING', 'deleted': 'DELETED', 'pending_delete': 'DELETED', 'killed': 'ERROR', }.get(image.get("status"), 'UNKNOWN') @staticmethod
**** CubicPower OpenStack Study **** def _get_progress(image): return { "queued": 25, "saving": 50, "active": 100, }.get(image.get("status"), 0)
**** CubicPower OpenStack Study **** class ViewBuilderV3(ViewBuilder):
**** CubicPower OpenStack Study **** def _get_bookmark_link(self, request, identifier, collection_name): """Create a URL that refers to a specific resource.""" if collection_name == "images": glance_url = glance.generate_image_url(identifier) return self._update_glance_link_prefix(glance_url) else: raise NotImplementedError # NOTE(cyeoh) The V3 version of _get_bookmark_link should # only ever be called with images as the # collection_name. The images API has been removed in the # V3 API and the V3 version of the view only exists for # the servers view to be able to generate the appropriate # bookmark link for the image of the instance.
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