345 lines
12 KiB
Python
345 lines
12 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import datetime
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import pecan
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from pecan import rest
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import wsme
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from wsme import types as wtypes
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import wsmeext.pecan as wsme_pecan
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from magnum.api.controllers import base
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from magnum.api.controllers import link
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from magnum.api.controllers.v1 import collection
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from magnum.api.controllers.v1 import types
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from magnum.api.controllers.v1 import utils as api_utils
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from magnum.common import context
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from magnum.common import exception
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from magnum.conductor import api
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from magnum import objects
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class PodPatchType(types.JsonPatchType):
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@staticmethod
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def mandatory_attrs():
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return ['/pod_uuid']
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class Pod(base.APIBase):
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"""API representation of a pod.
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This class enforces type checking and value constraints, and converts
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between the internal object model and the API representation of a pod.
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"""
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_pod_uuid = None
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def _get_pod_uuid(self):
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return self._pod_uuid
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def _set_pod_uuid(self, value):
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if value and self._pod_uuid != value:
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try:
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# FIXME(comstud): One should only allow UUID here, but
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# there seems to be a bug in that tests are passing an
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# ID. See bug #1301046 for more details.
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pod = objects.Pod.get(pecan.request.context, value)
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self._pod_uuid = pod.uuid
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# NOTE(lucasagomes): Create the pod_id attribute on-the-fly
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# to satisfy the api -> rpc object
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# conversion.
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self.pod_id = pod.id
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except exception.PodNotFound as e:
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# Change error code because 404 (NotFound) is inappropriate
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# response for a POST request to create a Pod
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e.code = 400 # BadRequest
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raise e
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elif value == wtypes.Unset:
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self._pod_uuid = wtypes.Unset
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uuid = types.uuid
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"""Unique UUID for this pod"""
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name = wtypes.text
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"""Name of this pod"""
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desc = wtypes.text
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"""Description of this pod"""
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bay_uuid = types.uuid
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"""Unique UUID of the bay the pod runs on"""
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images = [wtypes.text]
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"""A list of images used by containers in this pod."""
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labels = {wtypes.text: wtypes.text}
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"""Labels of this pod"""
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status = wtypes.text
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"""Staus of this pod """
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links = wsme.wsattr([link.Link], readonly=True)
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"""A list containing a self link and associated pod links"""
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def __init__(self, **kwargs):
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super(Pod, self).__init__()
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self.backend_api = api.API(context=context.RequestContext())
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self.fields = []
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fields = list(objects.Pod.fields)
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# NOTE(lucasagomes): pod_uuid is not part of objects.Pod.fields
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# because it's an API-only attribute
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fields.append('pod_uuid')
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for field in fields:
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# Skip fields we do not expose.
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if not hasattr(self, field):
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continue
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self.fields.append(field)
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setattr(self, field, kwargs.get(field, wtypes.Unset))
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# NOTE(lucasagomes): pod_id is an attribute created on-the-fly
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# by _set_pod_uuid(), it needs to be present in the fields so
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# that as_dict() will contain pod_id field when converting it
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# before saving it in the database.
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self.fields.append('pod_id')
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setattr(self, 'pod_uuid', kwargs.get('pod_id', wtypes.Unset))
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@staticmethod
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def _convert_with_links(pod, url, expand=True):
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if not expand:
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pod.unset_fields_except(['uuid', 'name', 'desc', 'bay_uuid',
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'images', 'labels', 'status'])
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# never expose the pod_id attribute
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pod.pod_id = wtypes.Unset
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pod.links = [link.Link.make_link('self', url,
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'pods', pod.uuid),
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link.Link.make_link('bookmark', url,
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'pods', pod.uuid,
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bookmark=True)
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]
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return pod
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@classmethod
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def convert_with_links(cls, rpc_pod, expand=True):
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pod = Pod(**rpc_pod.as_dict())
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return cls._convert_with_links(pod, pecan.request.host_url, expand)
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@classmethod
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def sample(cls, expand=True):
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sample = cls(uuid='f978db47-9a37-4e9f-8572-804a10abc0aa',
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name='MyPod',
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desc='Pod - Description',
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bay_uuid='7ae81bb3-dec3-4289-8d6c-da80bd8001ae',
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images=['MyImage'],
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labels={'name': 'foo'},
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status='Running',
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created_at=datetime.datetime.utcnow(),
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updated_at=datetime.datetime.utcnow())
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# NOTE(lucasagomes): pod_uuid getter() method look at the
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# _pod_uuid variable
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sample._pod_uuid = '87504bd9-ca50-40fd-b14e-bcb23ed42b27'
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return cls._convert_with_links(sample, 'http://localhost:9511', expand)
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class PodCollection(collection.Collection):
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"""API representation of a collection of pods."""
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pods = [Pod]
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"""A list containing pods objects"""
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def __init__(self, **kwargs):
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self._type = 'pods'
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self.backend_api = api.API(context=context.RequestContext())
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@staticmethod
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def convert_with_links(rpc_pods, limit, url=None, expand=False, **kwargs):
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collection = PodCollection()
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collection.pods = [Pod.convert_with_links(p, expand)
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for p in rpc_pods]
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collection.next = collection.get_next(limit, url=url, **kwargs)
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return collection
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@classmethod
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def sample(cls):
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sample = cls()
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sample.pods = [Pod.sample(expand=False)]
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return sample
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class PodsController(rest.RestController):
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"""REST controller for Pods."""
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def __init__(self):
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super(PodsController, self).__init__()
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self.backend_api = api.API(context=context.RequestContext())
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from_pods = False
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"""A flag to indicate if the requests to this controller are coming
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from the top-level resource Pods."""
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_custom_actions = {
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'detail': ['GET'],
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}
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def _get_pods_collection(self, marker, limit,
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sort_key, sort_dir, expand=False,
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resource_url=None):
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limit = api_utils.validate_limit(limit)
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sort_dir = api_utils.validate_sort_dir(sort_dir)
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marker_obj = None
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if marker:
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marker_obj = objects.Pod.get_by_uuid(pecan.request.context,
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marker)
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pods = self.backend_api.pod_list(pecan.request.context, limit,
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marker_obj, sort_key=sort_key,
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sort_dir=sort_dir)
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return PodCollection.convert_with_links(pods, limit,
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url=resource_url,
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expand=expand,
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sort_key=sort_key,
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sort_dir=sort_dir)
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@wsme_pecan.wsexpose(PodCollection, types.uuid,
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types.uuid, int, wtypes.text, wtypes.text)
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def get_all(self, pod_uuid=None, marker=None, limit=None,
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sort_key='id', sort_dir='asc'):
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"""Retrieve a list of pods.
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:param marker: pagination marker for large data sets.
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:param limit: maximum number of resources to return in a single result.
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:param sort_key: column to sort results by. Default: id.
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:param sort_dir: direction to sort. "asc" or "desc". Default: asc.
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"""
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return self._get_pods_collection(marker, limit, sort_key,
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sort_dir)
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@wsme_pecan.wsexpose(PodCollection, types.uuid,
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types.uuid, int, wtypes.text, wtypes.text)
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def detail(self, pod_uuid=None, marker=None, limit=None,
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sort_key='id', sort_dir='asc'):
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"""Retrieve a list of pods with detail.
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:param pod_uuid: UUID of a pod, to get only pods for that pod.
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:param marker: pagination marker for large data sets.
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:param limit: maximum number of resources to return in a single result.
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:param sort_key: column to sort results by. Default: id.
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:param sort_dir: direction to sort. "asc" or "desc". Default: asc.
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"""
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# NOTE(lucasagomes): /detail should only work agaist collections
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parent = pecan.request.path.split('/')[:-1][-1]
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if parent != "pods":
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raise exception.HTTPNotFound
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expand = True
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resource_url = '/'.join(['pods', 'detail'])
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return self._get_pods_collection(marker, limit,
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sort_key, sort_dir, expand,
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resource_url)
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@wsme_pecan.wsexpose(Pod, types.uuid)
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def get_one(self, pod_uuid):
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"""Retrieve information about the given pod.
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:param pod_uuid: UUID of a pod.
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"""
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if self.from_pods:
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raise exception.OperationNotPermitted
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rpc_pod = objects.Pod.get_by_uuid(pecan.request.context, pod_uuid)
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return Pod.convert_with_links(rpc_pod)
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@wsme_pecan.wsexpose(Pod, body=Pod, status_code=201)
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def post(self, pod):
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"""Create a new pod.
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:param pod: a pod within the request body.
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"""
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if self.from_pods:
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raise exception.OperationNotPermitted
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pod_obj = objects.Pod(pecan.request.context,
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**pod.as_dict())
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new_pod = self.backend_api.pod_create(pod_obj)
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# Set the HTTP Location Header
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pecan.response.location = link.build_url('pods', new_pod.uuid)
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return Pod.convert_with_links(new_pod)
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@wsme.validate(types.uuid, [PodPatchType])
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@wsme_pecan.wsexpose(Pod, types.uuid, body=[PodPatchType])
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def patch(self, pod_uuid, patch):
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"""Update an existing pod.
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:param pod_uuid: UUID of a pod.
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:param patch: a json PATCH document to apply to this pod.
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"""
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if self.from_pods:
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raise exception.OperationNotPermitted
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rpc_pod = objects.Pod.get_by_uuid(pecan.request.context, pod_uuid)
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try:
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pod_dict = rpc_pod.as_dict()
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# NOTE(lucasagomes):
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# 1) Remove pod_id because it's an internal value and
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# not present in the API object
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# 2) Add pod_uuid
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pod_dict['pod_uuid'] = pod_dict.pop('pod_id', None)
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pod = Pod(**api_utils.apply_jsonpatch(pod_dict, patch))
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except api_utils.JSONPATCH_EXCEPTIONS as e:
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raise exception.PatchError(patch=patch, reason=e)
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# Update only the fields that have changed
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for field in objects.Pod.fields:
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try:
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patch_val = getattr(pod, field)
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except AttributeError:
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# Ignore fields that aren't exposed in the API
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continue
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if patch_val == wtypes.Unset:
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patch_val = None
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if rpc_pod[field] != patch_val:
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rpc_pod[field] = patch_val
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if hasattr(pecan.request, 'rpcapi'):
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rpc_pod = objects.Pod.get_by_id(pecan.request.context,
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rpc_pod.pod_id)
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topic = pecan.request.rpcapi.get_topic_for(rpc_pod)
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new_pod = pecan.request.rpcapi.update_pod(
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pecan.request.context, rpc_pod, topic)
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return Pod.convert_with_links(new_pod)
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else:
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rpc_pod.save()
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return Pod.convert_with_links(rpc_pod)
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@wsme_pecan.wsexpose(None, types.uuid, status_code=204)
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def delete(self, pod_uuid):
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"""Delete a pod.
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:param pod_uuid: UUID of a pod.
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"""
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if self.from_pods:
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raise exception.OperationNotPermitted
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rpc_pod = objects.Pod.get_by_uuid(pecan.request.context,
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pod_uuid)
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self.backend_api.pod_delete(rpc_pod)
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