Source code for ceilometer.api.controllers.v2.events

#
# Copyright 2012 New Dream Network, LLC (DreamHost)
# Copyright 2013 IBM Corp.
# Copyright 2013 eNovance <licensing@enovance.com>
# Copyright Ericsson AB 2013. All rights reserved
# Copyright 2014 Hewlett-Packard Company
# Copyright 2015 Huawei Technologies Co., Ltd.
#
# 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.

import datetime

from oslo_log import log
import pecan
from pecan import rest
import six
import wsme
from wsme import types as wtypes
import wsmeext.pecan as wsme_pecan

from ceilometer.api.controllers.v2 import base
from ceilometer.api.controllers.v2 import utils as v2_utils
from ceilometer.api import rbac
from ceilometer.event import storage
from ceilometer.event.storage import models as event_models
from ceilometer.i18n import _

LOG = log.getLogger(__name__)


[docs]class TraitDescription(base.Base): """A description of a trait, with no associated value.""" type = wtypes.text "the data type, defaults to string" name = wtypes.text "the name of the trait" @classmethod
[docs] def sample(cls): return cls(name='service', type='string' )
[docs]class EventQuery(base.Query): """Query arguments for Event Queries.""" _supported_types = ['integer', 'float', 'string', 'datetime'] type = wsme.wsattr(wtypes.text, default='string') "the type of the trait filter, defaults to string" def __repr__(self): # for logging calls return '<EventQuery %r %s %r %s>' % (self.field, self.op, self._get_value_as_type(), self.type) @classmethod
[docs] def sample(cls): return cls(field="event_type", type="string", op="eq", value="compute.instance.create.start")
[docs]class Trait(base.Base): """A Trait associated with an event.""" name = wtypes.text "The name of the trait" value = wtypes.text "the value of the trait" type = wtypes.text "the type of the trait (string, integer, float or datetime)" @staticmethod def _convert_storage_trait(trait): """Helper method to convert a storage model into an API trait instance. If an API trait instance is passed in, just return it. """ if isinstance(trait, Trait): return trait value = (six.text_type(trait.value) if not trait.dtype == event_models.Trait.DATETIME_TYPE else trait.value.isoformat()) trait_type = event_models.Trait.get_name_by_type(trait.dtype) return Trait(name=trait.name, type=trait_type, value=value) @classmethod
[docs] def sample(cls): return cls(name='service', type='string', value='compute.hostname' )
[docs]class Event(base.Base): """A System event.""" message_id = wtypes.text "The message ID for the notification" event_type = wtypes.text "The type of the event" _traits = None
[docs] def get_traits(self): return self._traits
[docs] def set_traits(self, traits): self._traits = map(Trait._convert_storage_trait, traits)
traits = wsme.wsproperty(wtypes.ArrayType(Trait), get_traits, set_traits) "Event specific properties" generated = datetime.datetime "The time the event occurred" raw = base.JsonType() "The raw copy of notification" @classmethod
[docs] def sample(cls): return cls( event_type='compute.instance.update', generated=datetime.datetime(2015, 1, 1, 12, 0, 0, 0), message_id='94834db1-8f1b-404d-b2ec-c35901f1b7f0', traits={ Trait(name='request_id', value='req-4e2d67b8-31a4-48af-bb2f-9df72a353a72'), Trait(name='service', value='conductor.tem-devstack-01'), Trait(name='tenant_id', value='7f13f2b17917463b9ee21aa92c4b36d6') }, raw={'status': {'nested': 'started'}} )
def _build_rbac_query_filters(): filters = {'t_filter': [], 'admin_proj': None} # Returns user_id, proj_id for non-admins user_id, proj_id = rbac.get_limited_to(pecan.request.headers) # If non-admin, filter events by user and project if user_id and proj_id: filters['t_filter'].append({"key": "project_id", "string": proj_id, "op": "eq"}) filters['t_filter'].append({"key": "user_id", "string": user_id, "op": "eq"}) elif not user_id and not proj_id: filters['admin_proj'] = pecan.request.headers.get('X-Project-Id') return filters def _event_query_to_event_filter(q): evt_model_filter = { 'event_type': None, 'message_id': None, 'start_timestamp': None, 'end_timestamp': None } filters = _build_rbac_query_filters() traits_filter = filters['t_filter'] admin_proj = filters['admin_proj'] for i in q: if not i.op: i.op = 'eq' elif i.op not in base.operation_kind: error = (_('Operator %(operator)s is not supported. The supported' ' operators are: %(supported)s') % {'operator': i.op, 'supported': base.operation_kind}) raise base.ClientSideError(error) if i.field in evt_model_filter: if i.op != 'eq' and i.field in ('event_type', 'message_id'): error = (_('Operator %(operator)s is not supported. Only' ' `eq\' operator is available for field' ' %(field)s') % {'operator': i.op, 'field': i.field}) raise base.ClientSideError(error) if i.op != 'ge' and i.field == 'start_timestamp': error = (_('Operator %(operator)s is not supported. Only' ' `ge\' operator is available for field' ' %(field)s') % {'operator': i.op, 'field': i.field}) raise base.ClientSideError(error) if i.op != 'le' and i.field == 'end_timestamp': error = (_('Operator %(operator)s is not supported. Only' ' `le\' operator is available for field' ' %(field)s') % {'operator': i.op, 'field': i.field}) raise base.ClientSideError(error) evt_model_filter[i.field] = i.value else: trait_type = i.type or 'string' traits_filter.append({"key": i.field, trait_type: i._get_value_as_type(), "op": i.op}) return storage.EventFilter(traits_filter=traits_filter, admin_proj=admin_proj, **evt_model_filter)
[docs]class TraitsController(rest.RestController): """Works on Event Traits.""" @v2_utils.requires_admin @wsme_pecan.wsexpose([Trait], wtypes.text, wtypes.text)
[docs] def get_one(self, event_type, trait_name): """Return all instances of a trait for an event type. :param event_type: Event type to filter traits by :param trait_name: Trait to return values for """ LOG.debug("Getting traits for %s", event_type) return [Trait._convert_storage_trait(t) for t in pecan.request.event_storage_conn .get_traits(event_type, trait_name)]
@v2_utils.requires_admin @wsme_pecan.wsexpose([TraitDescription], wtypes.text)
[docs] def get_all(self, event_type): """Return all trait names for an event type. :param event_type: Event type to filter traits by """ get_trait_name = event_models.Trait.get_name_by_type return [TraitDescription(name=t['name'], type=get_trait_name(t['data_type'])) for t in pecan.request.event_storage_conn .get_trait_types(event_type)]
[docs]class EventTypesController(rest.RestController): """Works on Event Types in the system.""" traits = TraitsController() @v2_utils.requires_admin @wsme_pecan.wsexpose(None, wtypes.text)
[docs] def get_one(self, event_type): """Unused API, will always return 404. :param event_type: A event type """ pecan.abort(404)
@v2_utils.requires_admin @wsme_pecan.wsexpose([six.text_type])
[docs] def get_all(self): """Get all event types.""" return list(pecan.request.event_storage_conn.get_event_types())
[docs]class EventsController(rest.RestController): """Works on Events.""" @v2_utils.requires_context @wsme_pecan.wsexpose([Event], [EventQuery], int)
[docs] def get_all(self, q=None, limit=None): """Return all events matching the query filters. :param q: Filter arguments for which Events to return :param limit: Maximum number of samples to be returned. """ rbac.enforce("events:index", pecan.request) q = q or [] limit = v2_utils.enforce_limit(limit) event_filter = _event_query_to_event_filter(q) return [Event(message_id=event.message_id, event_type=event.event_type, generated=event.generated, traits=event.traits, raw=event.raw) for event in pecan.request.event_storage_conn.get_events(event_filter, limit)]
@v2_utils.requires_context @wsme_pecan.wsexpose(Event, wtypes.text)
[docs] def get_one(self, message_id): """Return a single event with the given message id. :param message_id: Message ID of the Event to be returned """ rbac.enforce("events:show", pecan.request) filters = _build_rbac_query_filters() t_filter = filters['t_filter'] admin_proj = filters['admin_proj'] event_filter = storage.EventFilter(traits_filter=t_filter, admin_proj=admin_proj, message_id=message_id) events = [event for event in pecan.request.event_storage_conn.get_events(event_filter)] if not events: raise base.EntityNotFound(_("Event"), message_id) if len(events) > 1: LOG.error(_("More than one event with " "id %s returned from storage driver") % message_id) event = events[0] return Event(message_id=event.message_id, event_type=event.event_type, generated=event.generated, traits=event.traits, raw=event.raw)

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