# -*- encoding: utf-8 -*- # # Copyright © 2012 New Dream Network, LLC (DreamHost) # Copyright 2013 IBM Corp. # Copyright © 2013 eNovance # # Authors: Doug Hellmann # Angus Salkeld # Eoghan Glynn # Julien Danjou # # 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. """Version 2 of the API. """ import ast import base64 import copy import datetime import functools import inspect import json import uuid from oslo.config import cfg 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 import acl from ceilometer.openstack.common import context from ceilometer.openstack.common.gettextutils import _ # noqa from ceilometer.openstack.common import log from ceilometer.openstack.common.notifier import api as notify from ceilometer.openstack.common import strutils from ceilometer.openstack.common import timeutils from ceilometer import sample from ceilometer import storage from ceilometer import utils LOG = log.getLogger(__name__) ALARM_API_OPTS = [ cfg.BoolOpt('record_history', default=True, help='Record alarm change events' ), ] cfg.CONF.register_opts(ALARM_API_OPTS, group='alarm') state_kind = ["ok", "alarm", "insufficient data"] state_kind_enum = wtypes.Enum(str, *state_kind) operation_kind = wtypes.Enum(str, 'lt', 'le', 'eq', 'ne', 'ge', 'gt') class ClientSideError(wsme.exc.ClientSideError): def __init__(self, error, status_code=400): pecan.response.translatable_error = error super(ClientSideError, self).__init__(error, status_code) class EntityNotFound(ClientSideError): def __init__(self, entity, id): super(EntityNotFound, self).__init__( _("%(entity)s %(id)s Not Found") % {'entity': entity, 'id': id}, status_code=404) class BoundedInt(wtypes.UserType): basetype = int def __init__(self, min=None, max=None): self.min = min self.max = max @property def name(self): if self.min is not None and self.max is not None: return 'int between %d and %d' % (self.min, self.max) elif self.min is not None: return 'int greater than %d' % self.min else: return 'int lower than %d' % self.max @staticmethod def frombasetype(value): return int(value) if value is not None else None def validate(self, value): if self.min is not None and value < self.min: error = _('Value %(value)s is invalid (should be greater or equal ' 'to %(min)s)') % dict(value=value, min=self.min) raise ClientSideError(error) if self.max is not None and value > self.max: error = _('Value %(value)s is invalid (should be lower or equal ' 'to %(max)s)') % dict(value=value, max=self.max) raise ClientSideError(error) return value class AdvEnum(wtypes.wsproperty): """Handle default and mandatory for wtypes.Enum """ def __init__(self, name, *args, **kwargs): self._name = '_advenum_%s' % name self._default = kwargs.pop('default', None) mandatory = kwargs.pop('mandatory', False) enum = wtypes.Enum(*args, **kwargs) super(AdvEnum, self).__init__(datatype=enum, fget=self._get, fset=self._set, mandatory=mandatory) def _get(self, parent): if hasattr(parent, self._name): value = getattr(parent, self._name) return value or self._default return self._default def _set(self, parent, value): if self.datatype.validate(value): setattr(parent, self._name, value) class _Base(wtypes.Base): @classmethod def from_db_model(cls, m): return cls(**(m.as_dict())) @classmethod def from_db_and_links(cls, m, links): return cls(links=links, **(m.as_dict())) def as_dict(self, db_model): valid_keys = inspect.getargspec(db_model.__init__)[0] if 'self' in valid_keys: valid_keys.remove('self') return self.as_dict_from_keys(valid_keys) def as_dict_from_keys(self, keys): return dict((k, getattr(self, k)) for k in keys if hasattr(self, k) and getattr(self, k) != wsme.Unset) class Link(_Base): """A link representation """ href = wtypes.text "The url of a link" rel = wtypes.text "The name of a link" @classmethod def sample(cls): return cls(href=('http://localhost:8777/v2/meters/volume?' 'q.field=resource_id&' 'q.value=bd9431c1-8d69-4ad3-803a-8d4a6b89fd36'), rel='volume' ) class Query(_Base): """Query filter. """ # The data types supported by the query. _supported_types = ['integer', 'float', 'string', 'boolean'] # Functions to convert the data field to the correct type. _type_converters = {'integer': int, 'float': float, 'boolean': strutils.bool_from_string, 'string': six.text_type, 'datetime': timeutils.parse_isotime} _op = None # provide a default def get_op(self): return self._op or 'eq' def set_op(self, value): self._op = value field = wtypes.text "The name of the field to test" #op = wsme.wsattr(operation_kind, default='eq') # this ^ doesn't seem to work. op = wsme.wsproperty(operation_kind, get_op, set_op) "The comparison operator. Defaults to 'eq'." value = wtypes.text "The value to compare against the stored data" type = wtypes.text "The data type of value to compare against the stored data" def __repr__(self): # for logging calls return '' % (self.field, self.op, self.value, self.type) @classmethod def sample(cls): return cls(field='resource_id', op='eq', value='bd9431c1-8d69-4ad3-803a-8d4a6b89fd36', type='string' ) def as_dict(self): return self.as_dict_from_keys(['field', 'op', 'type', 'value']) def _get_value_as_type(self, forced_type=None): """Convert metadata value to the specified data type. This method is called during metadata query to help convert the querying metadata to the data type specified by user. If there is no data type given, the metadata will be parsed by ast.literal_eval to try to do a smart converting. NOTE (flwang) Using "_" as prefix to avoid an InvocationError raised from wsmeext/sphinxext.py. It's OK to call it outside the Query class. Because the "public" side of that class is actually the outside of the API, and the "private" side is the API implementation. The method is only used in the API implementation, so it's OK. :returns: metadata value converted with the specified data type. """ type = forced_type or self.type try: converted_value = self.value if not type: try: converted_value = ast.literal_eval(self.value) except (ValueError, SyntaxError): msg = _('Failed to convert the metadata value %s' ' automatically') % (self.value) LOG.debug(msg) else: if type not in self._supported_types: # Types must be explicitly declared so the # correct type converter may be used. Subclasses # of Query may define _supported_types and # _type_converters to define their own types. raise TypeError() converted_value = self._type_converters[type](self.value) except ValueError: msg = _('Failed to convert the value %(value)s' ' to the expected data type %(type)s.') % \ {'value': self.value, 'type': type} raise ClientSideError(msg) except TypeError: msg = _('The data type %(type)s is not supported. The supported' ' data type list is: %(supported)s') % \ {'type': type, 'supported': self._supported_types} raise ClientSideError(msg) except Exception: msg = _('Unexpected exception converting %(value)s to' ' the expected data type %(type)s.') % \ {'value': self.value, 'type': type} raise ClientSideError(msg) return converted_value class ProjectNotAuthorized(ClientSideError): def __init__(self, id): super(ProjectNotAuthorized, self).__init__( _("Not Authorized to access project %s") % id, status_code=401) def _get_auth_project(on_behalf_of=None): # when an alarm is created by an admin on behalf of another tenant # we must ensure for: # - threshold alarm, that an implicit query constraint on project_id is # added so that admin-level visibility on statistics is not leaked # - combination alarm, that alarm ids verification is scoped to # alarms owned by the alarm project. # hence for null auth_project (indicating admin-ness) we check if # the creating tenant differs from the tenant on whose behalf the # alarm is being created auth_project = acl.get_limited_to_project(pecan.request.headers) created_by = pecan.request.headers.get('X-Project-Id') is_admin = auth_project is None if is_admin and on_behalf_of != created_by: auth_project = on_behalf_of return auth_project def _sanitize_query(query, db_func, on_behalf_of=None): '''Check the query to see if: 1) the request is coming from admin - then allow full visibility 2) non-admin - make sure that the query includes the requester's project. ''' q = copy.copy(query) auth_project = _get_auth_project(on_behalf_of) if auth_project: _verify_query_segregation(q, auth_project) proj_q = [i for i in q if i.field == 'project_id'] valid_keys = inspect.getargspec(db_func)[0] if not proj_q and 'on_behalf_of' not in valid_keys: # The user is restricted, but they didn't specify a project # so add it for them. q.append(Query(field='project_id', op='eq', value=auth_project)) return q def _verify_query_segregation(query, auth_project=None): '''Ensure non-admin queries are not constrained to another project.''' auth_project = (auth_project or acl.get_limited_to_project(pecan.request.headers)) if auth_project: for q in query: if q.field == 'project_id' and (auth_project != q.value or q.op != 'eq'): raise ProjectNotAuthorized(q.value) def _validate_query(query, db_func, internal_keys=[]): _verify_query_segregation(query) valid_keys = inspect.getargspec(db_func)[0] internal_keys.append('self') valid_keys = set(valid_keys) - set(internal_keys) translation = {'user_id': 'user', 'project_id': 'project', 'resource_id': 'resource'} has_timestamp = False for i in query: if i.field == 'timestamp': has_timestamp = True if i.op not in ('lt', 'le', 'gt', 'ge'): raise wsme.exc.InvalidInput('op', i.op, 'unimplemented operator for %s' % i.field) else: if i.op == 'eq': if i.field == 'search_offset': has_timestamp = True elif i.field == 'enabled': i._get_value_as_type('boolean') elif i.field.startswith('metadata.'): i._get_value_as_type() elif i.field.startswith('resource_metadata.'): i._get_value_as_type() else: key = translation.get(i.field, i.field) if key not in valid_keys: msg = ("unrecognized field in query: %s, " "valid keys: %s") % (query, valid_keys) raise wsme.exc.UnknownArgument(key, msg) else: raise wsme.exc.InvalidInput('op', i.op, 'unimplemented operator for %s' % i.field) if has_timestamp and not ('start' in valid_keys or 'start_timestamp' in valid_keys): raise wsme.exc.UnknownArgument('timestamp', "not valid for this resource") def _query_to_kwargs(query, db_func, internal_keys=[]): _validate_query(query, db_func, internal_keys=internal_keys) query = _sanitize_query(query, db_func) internal_keys.append('self') valid_keys = set(inspect.getargspec(db_func)[0]) - set(internal_keys) translation = {'user_id': 'user', 'project_id': 'project', 'resource_id': 'resource'} stamp = {} metaquery = {} kwargs = {} for i in query: if i.field == 'timestamp': if i.op in ('lt', 'le'): stamp['end_timestamp'] = i.value stamp['end_timestamp_op'] = i.op elif i.op in ('gt', 'ge'): stamp['start_timestamp'] = i.value stamp['start_timestamp_op'] = i.op else: if i.op == 'eq': if i.field == 'search_offset': stamp['search_offset'] = i.value elif i.field == 'enabled': kwargs[i.field] = i._get_value_as_type('boolean') elif i.field.startswith('metadata.'): metaquery[i.field] = i._get_value_as_type() elif i.field.startswith('resource_metadata.'): metaquery[i.field[9:]] = i._get_value_as_type() else: key = translation.get(i.field, i.field) kwargs[key] = i.value if metaquery and 'metaquery' in valid_keys: kwargs['metaquery'] = metaquery if stamp: q_ts = _get_query_timestamps(stamp) if 'start' in valid_keys: kwargs['start'] = q_ts['query_start'] kwargs['end'] = q_ts['query_end'] elif 'start_timestamp' in valid_keys: kwargs['start_timestamp'] = q_ts['query_start'] kwargs['end_timestamp'] = q_ts['query_end'] if 'start_timestamp_op' in stamp: kwargs['start_timestamp_op'] = stamp['start_timestamp_op'] if 'end_timestamp_op' in stamp: kwargs['end_timestamp_op'] = stamp['end_timestamp_op'] return kwargs def _validate_groupby_fields(groupby_fields): """Checks that the list of groupby fields from request is valid and if all fields are valid, returns fields with duplicates removed """ # NOTE(terriyu): Currently, metadata fields are not supported in our # group by statistics implementation valid_fields = set(['user_id', 'resource_id', 'project_id', 'source']) invalid_fields = set(groupby_fields) - valid_fields if invalid_fields: raise wsme.exc.UnknownArgument(invalid_fields, "Invalid groupby fields") # Remove duplicate fields # NOTE(terriyu): This assumes that we don't care about the order of the # group by fields. return list(set(groupby_fields)) def _get_query_timestamps(args={}): """Return any optional timestamp information in the request. Determine the desired range, if any, from the GET arguments. Set up the query range using the specified offset. [query_start ... start_timestamp ... end_timestamp ... query_end] Returns a dictionary containing: query_start: First timestamp to use for query start_timestamp: start_timestamp parameter from request query_end: Final timestamp to use for query end_timestamp: end_timestamp parameter from request search_offset: search_offset parameter from request """ search_offset = int(args.get('search_offset', 0)) start_timestamp = args.get('start_timestamp') if start_timestamp: start_timestamp = timeutils.parse_isotime(start_timestamp) start_timestamp = start_timestamp.replace(tzinfo=None) query_start = (start_timestamp - datetime.timedelta(minutes=search_offset)) else: query_start = None end_timestamp = args.get('end_timestamp') if end_timestamp: end_timestamp = timeutils.parse_isotime(end_timestamp) end_timestamp = end_timestamp.replace(tzinfo=None) query_end = end_timestamp + datetime.timedelta(minutes=search_offset) else: query_end = None return {'query_start': query_start, 'query_end': query_end, 'start_timestamp': start_timestamp, 'end_timestamp': end_timestamp, 'search_offset': search_offset, } def _flatten_metadata(metadata): """Return flattened resource metadata with flattened nested structures (except nested sets) and with all values converted to unicode strings. """ if metadata: return dict((k, unicode(v)) for k, v in utils.recursive_keypairs(metadata, separator='.') if type(v) is not set) return {} def _make_link(rel_name, url, type, type_arg, query=None): query_str = '' if query: query_str = '?q.field=%s&q.value=%s' % (query['field'], query['value']) return Link(href=('%s/v2/%s/%s%s') % (url, type, type_arg, query_str), rel=rel_name) def _send_notification(event, payload): notification = event.replace(" ", "_") notification = "alarm.%s" % notification notify.notify(None, notify.publisher_id("ceilometer.api"), notification, notify.INFO, payload) class OldSample(_Base): """A single measurement for a given meter and resource. This class is deprecated in favor of Sample. """ source = wtypes.text "The ID of the source that identifies where the sample comes from" counter_name = wsme.wsattr(wtypes.text, mandatory=True) "The name of the meter" # FIXME(dhellmann): Make this meter_name? counter_type = wsme.wsattr(wtypes.text, mandatory=True) "The type of the meter (see :ref:`measurements`)" # FIXME(dhellmann): Make this meter_type? counter_unit = wsme.wsattr(wtypes.text, mandatory=True) "The unit of measure for the value in counter_volume" # FIXME(dhellmann): Make this meter_unit? counter_volume = wsme.wsattr(float, mandatory=True) "The actual measured value" user_id = wtypes.text "The ID of the user who last triggered an update to the resource" project_id = wtypes.text "The ID of the project or tenant that owns the resource" resource_id = wsme.wsattr(wtypes.text, mandatory=True) "The ID of the :class:`Resource` for which the measurements are taken" timestamp = datetime.datetime "UTC date and time when the measurement was made" resource_metadata = {wtypes.text: wtypes.text} "Arbitrary metadata associated with the resource" message_id = wtypes.text "A unique identifier for the sample" def __init__(self, counter_volume=None, resource_metadata={}, timestamp=None, **kwds): if counter_volume is not None: counter_volume = float(counter_volume) resource_metadata = _flatten_metadata(resource_metadata) # this is to make it easier for clients to pass a timestamp in if timestamp and isinstance(timestamp, basestring): timestamp = timeutils.parse_isotime(timestamp) super(OldSample, self).__init__(counter_volume=counter_volume, resource_metadata=resource_metadata, timestamp=timestamp, **kwds) if self.resource_metadata in (wtypes.Unset, None): self.resource_metadata = {} @classmethod def sample(cls): return cls(source='openstack', counter_name='instance', counter_type='gauge', counter_unit='instance', counter_volume=1, resource_id='bd9431c1-8d69-4ad3-803a-8d4a6b89fd36', project_id='35b17138-b364-4e6a-a131-8f3099c5be68', user_id='efd87807-12d2-4b38-9c70-5f5c2ac427ff', timestamp=datetime.datetime.utcnow(), resource_metadata={'name1': 'value1', 'name2': 'value2'}, message_id='5460acce-4fd6-480d-ab18-9735ec7b1996', ) class Statistics(_Base): """Computed statistics for a query. """ groupby = {wtypes.text: wtypes.text} "Dictionary of field names for group, if groupby statistics are requested" unit = wtypes.text "The unit type of the data set" min = float "The minimum volume seen in the data" max = float "The maximum volume seen in the data" avg = float "The average of all of the volume values seen in the data" sum = float "The total of all of the volume values seen in the data" count = int "The number of samples seen" duration = float "The difference, in seconds, between the oldest and newest timestamp" duration_start = datetime.datetime "UTC date and time of the earliest timestamp, or the query start time" duration_end = datetime.datetime "UTC date and time of the oldest timestamp, or the query end time" period = int "The difference, in seconds, between the period start and end" period_start = datetime.datetime "UTC date and time of the period start" period_end = datetime.datetime "UTC date and time of the period end" def __init__(self, start_timestamp=None, end_timestamp=None, **kwds): super(Statistics, self).__init__(**kwds) self._update_duration(start_timestamp, end_timestamp) def _update_duration(self, start_timestamp, end_timestamp): # "Clamp" the timestamps we return to the original time # range, excluding the offset. if (start_timestamp and self.duration_start and self.duration_start < start_timestamp): self.duration_start = start_timestamp LOG.debug(_('clamping min timestamp to range')) if (end_timestamp and self.duration_end and self.duration_end > end_timestamp): self.duration_end = end_timestamp LOG.debug(_('clamping max timestamp to range')) # If we got valid timestamps back, compute a duration in seconds. # # If the min > max after clamping then we know the # timestamps on the samples fell outside of the time # range we care about for the query, so treat them as # "invalid." # # If the timestamps are invalid, return None as a # sentinal indicating that there is something "funny" # about the range. if (self.duration_start and self.duration_end and self.duration_start <= self.duration_end): self.duration = timeutils.delta_seconds(self.duration_start, self.duration_end) else: self.duration_start = self.duration_end = self.duration = None @classmethod def sample(cls): return cls(unit='GiB', min=1, max=9, avg=4.5, sum=45, count=10, duration_start=datetime.datetime(2013, 1, 4, 16, 42), duration_end=datetime.datetime(2013, 1, 4, 16, 47), period=7200, period_start=datetime.datetime(2013, 1, 4, 16, 00), period_end=datetime.datetime(2013, 1, 4, 18, 00), ) class MeterController(rest.RestController): """Manages operations on a single meter. """ _custom_actions = { 'statistics': ['GET'], } def __init__(self, meter_name): pecan.request.context['meter_name'] = meter_name self.meter_name = meter_name @wsme_pecan.wsexpose([OldSample], [Query], int) def get_all(self, q=[], limit=None): """Return samples for the meter. :param q: Filter rules for the data to be returned. :param limit: Maximum number of samples to return. """ if limit and limit < 0: raise ClientSideError(_("Limit must be positive")) kwargs = _query_to_kwargs(q, storage.SampleFilter.__init__) kwargs['meter'] = self.meter_name f = storage.SampleFilter(**kwargs) return [OldSample.from_db_model(e) for e in pecan.request.storage_conn.get_samples(f, limit=limit) ] @wsme_pecan.wsexpose([OldSample], body=[OldSample]) def post(self, samples): """Post a list of new Samples to Ceilometer. :param samples: a list of samples within the request body. """ now = timeutils.utcnow() auth_project = acl.get_limited_to_project(pecan.request.headers) def_source = pecan.request.cfg.sample_source def_project_id = pecan.request.headers.get('X-Project-Id') def_user_id = pecan.request.headers.get('X-User-Id') published_samples = [] for s in samples: if self.meter_name != s.counter_name: raise wsme.exc.InvalidInput('counter_name', s.counter_name, 'should be %s' % self.meter_name) if s.message_id: raise wsme.exc.InvalidInput('message_id', s.message_id, 'The message_id must not be set') if s.counter_type not in sample.TYPES: raise wsme.exc.InvalidInput('counter_type', s.counter_type, 'The counter type must be: ' + ', '.join(sample.TYPES)) s.user_id = (s.user_id or def_user_id) s.project_id = (s.project_id or def_project_id) s.source = '%s:%s' % (s.project_id, (s.source or def_source)) s.timestamp = (s.timestamp or now) if auth_project and auth_project != s.project_id: # non admin user trying to cross post to another project_id auth_msg = 'can not post samples to other projects' raise wsme.exc.InvalidInput('project_id', s.project_id, auth_msg) published_sample = sample.Sample( name=s.counter_name, type=s.counter_type, unit=s.counter_unit, volume=s.counter_volume, user_id=s.user_id, project_id=s.project_id, resource_id=s.resource_id, timestamp=s.timestamp.isoformat(), resource_metadata=s.resource_metadata, source=s.source) published_samples.append(published_sample) s.message_id = published_sample.id with pecan.request.pipeline_manager.publisher( context.get_admin_context()) as publisher: publisher(published_samples) return samples @wsme_pecan.wsexpose([Statistics], [Query], [unicode], int) def statistics(self, q=[], groupby=[], period=None): """Computes the statistics of the samples in the time range given. :param q: Filter rules for the data to be returned. :param groupby: Fields for group by aggregation :param period: Returned result will be an array of statistics for a period long of that number of seconds. """ if period and period < 0: raise ClientSideError(_("Period must be positive.")) kwargs = _query_to_kwargs(q, storage.SampleFilter.__init__) kwargs['meter'] = self.meter_name f = storage.SampleFilter(**kwargs) g = _validate_groupby_fields(groupby) computed = pecan.request.storage_conn.get_meter_statistics(f, period, g) LOG.debug(_('computed value coming from %r'), pecan.request.storage_conn) # Find the original timestamp in the query to use for clamping # the duration returned in the statistics. start = end = None for i in q: if i.field == 'timestamp' and i.op in ('lt', 'le'): end = timeutils.parse_isotime(i.value).replace(tzinfo=None) elif i.field == 'timestamp' and i.op in ('gt', 'ge'): start = timeutils.parse_isotime(i.value).replace(tzinfo=None) return [Statistics(start_timestamp=start, end_timestamp=end, **c.as_dict()) for c in computed] class Meter(_Base): """One category of measurements. """ name = wtypes.text "The unique name for the meter" type = wtypes.Enum(str, *sample.TYPES) "The meter type (see :ref:`measurements`)" unit = wtypes.text "The unit of measure" resource_id = wtypes.text "The ID of the :class:`Resource` for which the measurements are taken" project_id = wtypes.text "The ID of the project or tenant that owns the resource" user_id = wtypes.text "The ID of the user who last triggered an update to the resource" source = wtypes.text "The ID of the source that identifies where the meter comes from" meter_id = wtypes.text "The unique identifier for the meter" def __init__(self, **kwargs): meter_id = base64.encodestring('%s+%s' % (kwargs['resource_id'], kwargs['name'])) kwargs['meter_id'] = meter_id super(Meter, self).__init__(**kwargs) @classmethod def sample(cls): return cls(name='instance', type='gauge', unit='instance', resource_id='bd9431c1-8d69-4ad3-803a-8d4a6b89fd36', project_id='35b17138-b364-4e6a-a131-8f3099c5be68', user_id='efd87807-12d2-4b38-9c70-5f5c2ac427ff', source='openstack', ) class MetersController(rest.RestController): """Works on meters.""" @pecan.expose() def _lookup(self, meter_name, *remainder): # NOTE(gordc): drop last path if empty (Bug #1202739) if remainder and not remainder[-1]: remainder = remainder[:-1] return MeterController(meter_name), remainder @wsme_pecan.wsexpose([Meter], [Query]) def get_all(self, q=[]): """Return all known meters, based on the data recorded so far. :param q: Filter rules for the meters to be returned. """ kwargs = _query_to_kwargs(q, pecan.request.storage_conn.get_meters) return [Meter.from_db_model(m) for m in pecan.request.storage_conn.get_meters(**kwargs)] class Sample(_Base): """One measurement.""" id = wtypes.text "The unique identifier for the sample." meter = wtypes.text "The meter name this sample is for." type = wtypes.Enum(str, *sample.TYPES) "The meter type (see :ref:`measurements`)" unit = wtypes.text "The unit of measure." volume = float "The metered value." user_id = wtypes.text "The user this sample was taken for." project_id = wtypes.text "The project this sample was taken for." resource_id = wtypes.text "The :class:`Resource` this sample was taken for." source = wtypes.text "The source that identifies where the sample comes from." timestamp = datetime.datetime "When the sample has been generated." metadata = {wtypes.text: wtypes.text} "Arbitrary metadata associated with the sample." @classmethod def from_db_model(cls, m): return cls(id=m.message_id, meter=m.counter_name, type=m.counter_type, unit=m.counter_unit, volume=m.counter_volume, user_id=m.user_id, project_id=m.project_id, resource_id=m.resource_id, timestamp=m.timestamp, metadata=_flatten_metadata(m.resource_metadata)) @classmethod def sample(cls): return cls(id=str(uuid.uuid1()), meter='instance', type='gauge', unit='instance', resource_id='bd9431c1-8d69-4ad3-803a-8d4a6b89fd36', project_id='35b17138-b364-4e6a-a131-8f3099c5be68', user_id='efd87807-12d2-4b38-9c70-5f5c2ac427ff', timestamp=timeutils.utcnow(), source='openstack', metadata={'name1': 'value1', 'name2': 'value2'}, ) class SamplesController(rest.RestController): """Controller managing the samples.""" @wsme_pecan.wsexpose([Sample], [Query], int) def get_all(self, q=[], limit=None): """Return all known samples, based on the data recorded so far. :param q: Filter rules for the samples to be returned. :param limit: Maximum number of samples to be returned. """ if limit and limit < 0: raise ClientSideError(_("Limit must be positive")) kwargs = _query_to_kwargs(q, storage.SampleFilter.__init__) f = storage.SampleFilter(**kwargs) return map(Sample.from_db_model, pecan.request.storage_conn.get_samples(f, limit=limit)) @wsme_pecan.wsexpose(Sample, wtypes.text) def get_one(self, sample_id): """Return a sample :param sample_id: the id of the sample """ f = storage.SampleFilter(message_id=sample_id) samples = list(pecan.request.storage_conn.get_samples(f)) if len(samples) < 1: raise EntityNotFound(_('Sample'), sample_id) return Sample.from_db_model(samples[0]) class Resource(_Base): """An externally defined object for which samples have been received. """ resource_id = wtypes.text "The unique identifier for the resource" project_id = wtypes.text "The ID of the owning project or tenant" user_id = wtypes.text "The ID of the user who created the resource or updated it last" first_sample_timestamp = datetime.datetime "UTC date & time of the first sample associated with the resource" last_sample_timestamp = datetime.datetime "UTC date & time of the last sample associated with the resource" metadata = {wtypes.text: wtypes.text} "Arbitrary metadata associated with the resource" links = [Link] "A list containing a self link and associated meter links" source = wtypes.text "The source where the resource come from" def __init__(self, metadata={}, **kwds): metadata = _flatten_metadata(metadata) super(Resource, self).__init__(metadata=metadata, **kwds) @classmethod def sample(cls): return cls(resource_id='bd9431c1-8d69-4ad3-803a-8d4a6b89fd36', project_id='35b17138-b364-4e6a-a131-8f3099c5be68', user_id='efd87807-12d2-4b38-9c70-5f5c2ac427ff', timestamp=datetime.datetime.utcnow(), source="openstack", metadata={'name1': 'value1', 'name2': 'value2'}, links=[Link(href=('http://localhost:8777/v2/resources/' 'bd9431c1-8d69-4ad3-803a-8d4a6b89fd36'), rel='self'), Link(href=('http://localhost:8777/v2/meters/volume?' 'q.field=resource_id&' 'q.value=bd9431c1-8d69-4ad3-803a-' '8d4a6b89fd36'), rel='volume')], ) class ResourcesController(rest.RestController): """Works on resources.""" def _resource_links(self, resource_id): links = [_make_link('self', pecan.request.host_url, 'resources', resource_id)] for meter in pecan.request.storage_conn.get_meters(resource= resource_id): query = {'field': 'resource_id', 'value': resource_id} links.append(_make_link(meter.name, pecan.request.host_url, 'meters', meter.name, query=query)) return links @wsme_pecan.wsexpose(Resource, unicode) def get_one(self, resource_id): """Retrieve details about one resource. :param resource_id: The UUID of the resource. """ authorized_project = acl.get_limited_to_project(pecan.request.headers) resources = list(pecan.request.storage_conn.get_resources( resource=resource_id, project=authorized_project)) if not resources: raise EntityNotFound(_('Resource'), resource_id) return Resource.from_db_and_links(resources[0], self._resource_links(resource_id)) @wsme_pecan.wsexpose([Resource], [Query]) def get_all(self, q=[]): """Retrieve definitions of all of the resources. :param q: Filter rules for the resources to be returned. """ kwargs = _query_to_kwargs(q, pecan.request.storage_conn.get_resources) resources = [ Resource.from_db_and_links(r, self._resource_links(r.resource_id)) for r in pecan.request.storage_conn.get_resources(**kwargs)] return resources class AlarmThresholdRule(_Base): meter_name = wsme.wsattr(wtypes.text, mandatory=True) "The name of the meter" #FIXME(sileht): default doesn't work #workaround: default is set in validate method query = wsme.wsattr([Query], default=[]) """The query to find the data for computing statistics. Ownership settings are automatically included based on the Alarm owner. """ period = wsme.wsattr(BoundedInt(min=1), default=60) "The time range in seconds over which query" comparison_operator = AdvEnum('comparison_operator', str, 'lt', 'le', 'eq', 'ne', 'ge', 'gt', default='eq') "The comparison against the alarm threshold" threshold = wsme.wsattr(float, mandatory=True) "The threshold of the alarm" statistic = AdvEnum('statistic', str, 'max', 'min', 'avg', 'sum', 'count', default='avg') "The statistic to compare to the threshold" evaluation_periods = wsme.wsattr(BoundedInt(min=1), default=1) "The number of historical periods to evaluate the threshold" exclude_outliers = wsme.wsattr(bool, default=False) "Whether datapoints with anomolously low sample counts are excluded" def __init__(self, query=None, **kwargs): if query: query = [Query(**q) for q in query] super(AlarmThresholdRule, self).__init__(query=query, **kwargs) @staticmethod def validate(threshold_rule): #note(sileht): wsme default doesn't work in some case #workaround for https://bugs.launchpad.net/wsme/+bug/1227039 if not threshold_rule.query: threshold_rule.query = [] timestamp_keys = ['timestamp', 'start', 'start_timestamp' 'end', 'end_timestamp'] _validate_query(threshold_rule.query, storage.SampleFilter.__init__, internal_keys=timestamp_keys) return threshold_rule @property def default_description(self): return _( 'Alarm when %(meter_name)s is %(comparison_operator)s a ' '%(statistic)s of %(threshold)s over %(period)s seconds') % \ dict(comparison_operator=self.comparison_operator, statistic=self.statistic, threshold=self.threshold, meter_name=self.meter_name, period=self.period) def as_dict(self): rule = self.as_dict_from_keys(['period', 'comparison_operator', 'threshold', 'statistic', 'evaluation_periods', 'meter_name', 'exclude_outliers']) rule['query'] = [q.as_dict() for q in self.query] return rule @classmethod def sample(cls): return cls(meter_name='cpu_util', period=60, evaluation_periods=1, threshold=300.0, statistic='avg', comparison_operator='gt', query=[{'field': 'resource_id', 'value': '2a4d689b-f0b8-49c1-9eef-87cae58d80db', 'op': 'eq', 'type': 'string'}]) class AlarmCombinationRule(_Base): operator = AdvEnum('operator', str, 'or', 'and', default='and') "How to combine the sub-alarms" alarm_ids = wsme.wsattr([wtypes.text], mandatory=True) "List of alarm identifiers to combine" @property def default_description(self): return _('Combined state of alarms %s') % self.operator.join( self.alarm_ids) def as_dict(self): return self.as_dict_from_keys(['operator', 'alarm_ids']) @classmethod def sample(cls): return cls(operator='or', alarm_ids=['739e99cb-c2ec-4718-b900-332502355f38', '153462d0-a9b8-4b5b-8175-9e4b05e9b856']) class Alarm(_Base): """Representation of an alarm. .. note:: combination_rule and threshold_rule are mutually exclusive. The *type* of the alarm should be set to *threshold* or *combination* and the appropriate rule should be filled. """ alarm_id = wtypes.text "The UUID of the alarm" name = wsme.wsattr(wtypes.text, mandatory=True) "The name for the alarm" _description = None # provide a default def get_description(self): rule = getattr(self, '%s_rule' % self.type, None) if not self._description and rule: return six.text_type(rule.default_description) return self._description def set_description(self, value): self._description = value description = wsme.wsproperty(wtypes.text, get_description, set_description) "The description of the alarm" enabled = wsme.wsattr(bool, default=True) "This alarm is enabled?" ok_actions = wsme.wsattr([wtypes.text], default=[]) "The actions to do when alarm state change to ok" alarm_actions = wsme.wsattr([wtypes.text], default=[]) "The actions to do when alarm state change to alarm" insufficient_data_actions = wsme.wsattr([wtypes.text], default=[]) "The actions to do when alarm state change to insufficient data" repeat_actions = wsme.wsattr(bool, default=False) "The actions should be re-triggered on each evaluation cycle" type = AdvEnum('type', str, 'threshold', 'combination', mandatory=True) "Explicit type specifier to select which rule to follow below." threshold_rule = AlarmThresholdRule "Describe when to trigger the alarm based on computed statistics" combination_rule = AlarmCombinationRule """Describe when to trigger the alarm based on combining the state of other alarms""" # These settings are ignored in the PUT or POST operations, but are # filled in for GET project_id = wtypes.text "The ID of the project or tenant that owns the alarm" user_id = wtypes.text "The ID of the user who created the alarm" timestamp = datetime.datetime "The date of the last alarm definition update" state = AdvEnum('state', str, *state_kind, default='insufficient data') "The state offset the alarm" state_timestamp = datetime.datetime "The date of the last alarm state changed" def __init__(self, rule=None, **kwargs): super(Alarm, self).__init__(**kwargs) if rule: if self.type == 'threshold': self.threshold_rule = AlarmThresholdRule(**rule) elif self.type == 'combination': self.combination_rule = AlarmCombinationRule(**rule) @staticmethod def validate(alarm): if (alarm.threshold_rule in (wtypes.Unset, None) and alarm.combination_rule in (wtypes.Unset, None)): error = _("either threshold_rule or combination_rule " "must be set") raise ClientSideError(error) if alarm.threshold_rule and alarm.combination_rule: error = _("threshold_rule and combination_rule " "cannot be set at the same time") raise ClientSideError(error) if alarm.threshold_rule: # ensure an implicit constraint on project_id is added to # the query if not already present alarm.threshold_rule.query = _sanitize_query( alarm.threshold_rule.query, storage.SampleFilter.__init__, on_behalf_of=alarm.project_id ) elif alarm.combination_rule: project = _get_auth_project(alarm.project_id if alarm.project_id != wtypes.Unset else None) for id in alarm.combination_rule.alarm_ids: alarms = list(pecan.request.storage_conn.get_alarms( alarm_id=id, project=project)) if not alarms: raise EntityNotFound(_('Alarm'), id) return alarm @classmethod def sample(cls): return cls(alarm_id=None, name="SwiftObjectAlarm", description="An alarm", type='combination', threshold_rule=None, combination_rule=AlarmCombinationRule.sample(), user_id="c96c887c216949acbdfbd8b494863567", project_id="c96c887c216949acbdfbd8b494863567", enabled=True, timestamp=datetime.datetime.utcnow(), state="ok", state_timestamp=datetime.datetime.utcnow(), ok_actions=["http://site:8000/ok"], alarm_actions=["http://site:8000/alarm"], insufficient_data_actions=["http://site:8000/nodata"], repeat_actions=False, ) def as_dict(self, db_model): d = super(Alarm, self).as_dict(db_model) for k in d: if k.endswith('_rule'): del d[k] d['rule'] = getattr(self, "%s_rule" % self.type).as_dict() return d class AlarmChange(_Base): """Representation of an event in an alarm's history """ event_id = wtypes.text "The UUID of the change event" alarm_id = wtypes.text "The UUID of the alarm" type = wtypes.Enum(str, 'creation', 'rule change', 'state transition', 'deletion') "The type of change" detail = wtypes.text "JSON fragment describing change" project_id = wtypes.text "The project ID of the initiating identity" user_id = wtypes.text "The user ID of the initiating identity" on_behalf_of = wtypes.text "The tenant on behalf of which the change is being made" timestamp = datetime.datetime "The time/date of the alarm change" @classmethod def sample(cls): return cls(alarm_id='e8ff32f772a44a478182c3fe1f7cad6a', type='rule change', detail='{"threshold": 42.0, "evaluation_periods": 4}', user_id="3e5d11fda79448ac99ccefb20be187ca", project_id="b6f16144010811e387e4de429e99ee8c", on_behalf_of="92159030020611e3b26dde429e99ee8c", timestamp=datetime.datetime.utcnow(), ) class AlarmController(rest.RestController): """Manages operations on a single alarm. """ _custom_actions = { 'history': ['GET'], 'state': ['PUT', 'GET'], } def __init__(self, alarm_id): pecan.request.context['alarm_id'] = alarm_id self._id = alarm_id def _alarm(self): self.conn = pecan.request.storage_conn auth_project = acl.get_limited_to_project(pecan.request.headers) alarms = list(self.conn.get_alarms(alarm_id=self._id, project=auth_project)) if not alarms: raise EntityNotFound(_('Alarm'), self._id) return alarms[0] def _record_change(self, data, now, on_behalf_of=None, type=None): if not cfg.CONF.alarm.record_history: return type = type or storage.models.AlarmChange.RULE_CHANGE scrubbed_data = utils.stringify_timestamps(data) detail = json.dumps(scrubbed_data) user_id = pecan.request.headers.get('X-User-Id') project_id = pecan.request.headers.get('X-Project-Id') on_behalf_of = on_behalf_of or project_id payload = dict(event_id=str(uuid.uuid4()), alarm_id=self._id, type=type, detail=detail, user_id=user_id, project_id=project_id, on_behalf_of=on_behalf_of, timestamp=now) try: self.conn.record_alarm_change(payload) except NotImplementedError: pass # Revert to the pre-json'ed details ... payload['detail'] = scrubbed_data _send_notification(type, payload) @wsme_pecan.wsexpose(Alarm) def get(self): """Return this alarm. """ return Alarm.from_db_model(self._alarm()) @wsme_pecan.wsexpose(Alarm, body=Alarm) def put(self, data): """Modify this alarm. :param data: a alarm within the request body. """ # Ensure alarm exists alarm_in = self._alarm() now = timeutils.utcnow() data.alarm_id = self._id user, project = acl.get_limited_to(pecan.request.headers) if user: data.user_id = user elif data.user_id == wtypes.Unset: data.user_id = alarm_in.user_id if project: data.project_id = project elif data.project_id == wtypes.Unset: data.project_id = alarm_in.project_id data.timestamp = now if alarm_in.state != data.state: data.state_timestamp = now else: data.state_timestamp = alarm_in.state_timestamp old_alarm = Alarm.from_db_model(alarm_in).as_dict(storage.models.Alarm) updated_alarm = data.as_dict(storage.models.Alarm) try: alarm_in = storage.models.Alarm(**updated_alarm) except Exception: LOG.exception(_("Error while putting alarm: %s") % updated_alarm) raise ClientSideError(_("Alarm incorrect")) alarm = self.conn.update_alarm(alarm_in) change = dict((k, v) for k, v in updated_alarm.items() if v != old_alarm[k] and k not in ['timestamp', 'state_timestamp']) self._record_change(change, now, on_behalf_of=alarm.project_id) return Alarm.from_db_model(alarm) @wsme_pecan.wsexpose(None, status_code=204) def delete(self): """Delete this alarm. """ # ensure alarm exists before deleting alarm = self._alarm() self.conn.delete_alarm(alarm.alarm_id) change = Alarm.from_db_model(alarm).as_dict(storage.models.Alarm) self._record_change(change, timeutils.utcnow(), type=storage.models.AlarmChange.DELETION) # TODO(eglynn): add pagination marker to signature once overall # API support for pagination is finalized @wsme_pecan.wsexpose([AlarmChange], [Query]) def history(self, q=[]): """Assembles the alarm history requested. :param q: Filter rules for the changes to be described. """ # allow history to be returned for deleted alarms, but scope changes # returned to those carried out on behalf of the auth'd tenant, to # avoid inappropriate cross-tenant visibility of alarm history auth_project = acl.get_limited_to_project(pecan.request.headers) conn = pecan.request.storage_conn kwargs = _query_to_kwargs(q, conn.get_alarm_changes, ['on_behalf_of']) return [AlarmChange.from_db_model(ac) for ac in conn.get_alarm_changes(self._id, auth_project, **kwargs)] @wsme.validate(state_kind_enum) @wsme_pecan.wsexpose(state_kind_enum, body=state_kind_enum) def put_state(self, state): """Set the state of this alarm. :param state: a alarm state within the request body. """ # note(sileht): body are not validated by wsme # Workaround for https://bugs.launchpad.net/wsme/+bug/1227229 if state not in state_kind: raise ClientSideError(_("state invalid")) now = timeutils.utcnow() alarm = self._alarm() alarm.state = state alarm.state_timestamp = now alarm = self.conn.update_alarm(alarm) change = {'state': alarm.state} self._record_change(change, now, on_behalf_of=alarm.project_id, type=storage.models.AlarmChange.STATE_TRANSITION) return alarm.state @wsme_pecan.wsexpose(state_kind_enum) def get_state(self): """Get the state of this alarm. """ alarm = self._alarm() return alarm.state class AlarmsController(rest.RestController): """Manages operations on the alarms collection. """ @pecan.expose() def _lookup(self, alarm_id, *remainder): if remainder and not remainder[-1]: remainder = remainder[:-1] return AlarmController(alarm_id), remainder def _record_creation(self, conn, data, alarm_id, now): if not cfg.CONF.alarm.record_history: return type = storage.models.AlarmChange.CREATION scrubbed_data = utils.stringify_timestamps(data) detail = json.dumps(scrubbed_data) user_id = pecan.request.headers.get('X-User-Id') project_id = pecan.request.headers.get('X-Project-Id') payload = dict(event_id=str(uuid.uuid4()), alarm_id=alarm_id, type=type, detail=detail, user_id=user_id, project_id=project_id, on_behalf_of=project_id, timestamp=now) try: conn.record_alarm_change(payload) except NotImplementedError: pass # Revert to the pre-json'ed details ... payload['detail'] = scrubbed_data _send_notification(type, payload) @wsme_pecan.wsexpose(Alarm, body=Alarm, status_code=201) def post(self, data): """Create a new alarm. :param data: a alarm within the request body. """ conn = pecan.request.storage_conn now = timeutils.utcnow() data.alarm_id = str(uuid.uuid4()) user, project = acl.get_limited_to(pecan.request.headers) if user: data.user_id = user elif data.user_id == wtypes.Unset: data.user_id = pecan.request.headers.get('X-User-Id') if project: data.project_id = project elif data.project_id == wtypes.Unset: data.project_id = pecan.request.headers.get('X-Project-Id') data.timestamp = now data.state_timestamp = now change = data.as_dict(storage.models.Alarm) # make sure alarms are unique by name per project. alarms = list(conn.get_alarms(name=data.name, project=data.project_id)) if alarms: raise ClientSideError( _("Alarm with name='%s' exists") % data.name, status_code=409) try: alarm_in = storage.models.Alarm(**change) except Exception: LOG.exception(_("Error while posting alarm: %s") % change) raise ClientSideError(_("Alarm incorrect")) alarm = conn.create_alarm(alarm_in) self._record_creation(conn, change, alarm.alarm_id, now) return Alarm.from_db_model(alarm) @wsme_pecan.wsexpose([Alarm], [Query]) def get_all(self, q=[]): """Return all alarms, based on the query provided. :param q: Filter rules for the alarms to be returned. """ kwargs = _query_to_kwargs(q, pecan.request.storage_conn.get_alarms) return [Alarm.from_db_model(m) for m in pecan.request.storage_conn.get_alarms(**kwargs)] class TraitDescription(_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 def sample(cls): return cls(name='service', type='string' ) class EventQuery(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 '' % (self.field, self.op, self._get_value_as_type(), self.type) class Trait(_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)" @classmethod def sample(cls): return cls(name='service', type='string', value='compute.hostname' ) class Event(_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 def get_traits(self): return self._traits @staticmethod def _convert_storage_trait(t): """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(t, Trait): return t value = (six.text_type(t.value) if not t.dtype == storage.models.Trait.DATETIME_TYPE else t.value.isoformat()) type = storage.models.Trait.get_name_by_type(t.dtype) return Trait(name=t.name, type=type, value=value) def set_traits(self, traits): self._traits = map(self._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" @classmethod def sample(cls): return cls( event_type='compute.instance.update', generated='2013-11-11T20:00:00', message_id='94834db1-8f1b-404d-b2ec-c35901f1b7f0', traits={ 'request_id': 'req-4e2d67b8-31a4-48af-bb2f-9df72a353a72', 'service': 'conductor.tem-devstack-01', 'tenant_id': '7f13f2b17917463b9ee21aa92c4b36d6' } ) def requires_admin(func): @functools.wraps(func) def wrapped(*args, **kwargs): usr_limit, proj_limit = acl.get_limited_to(pecan.request.headers) # If User and Project are None, you have full access. if usr_limit and proj_limit: raise ProjectNotAuthorized(proj_limit) return func(*args, **kwargs) return wrapped def _event_query_to_event_filter(q): evt_model_filter = { 'event_type': None, 'message_id': None, 'start_time': None, 'end_time': None } traits_filter = [] for i in q: # FIXME(herndon): Support for operators other than # 'eq' will come later. if i.op != 'eq': error = _("operator %s not supported") % i.op raise ClientSideError(error) if i.field in evt_model_filter: evt_model_filter[i.field] = i.value else: traits_filter.append({"key": i.field, i.type: i._get_value_as_type()}) return storage.EventFilter(traits_filter=traits_filter, **evt_model_filter) class TraitsController(rest.RestController): """Works on Event Traits.""" @requires_admin @wsme_pecan.wsexpose([Trait], wtypes.text, wtypes.text) 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(name=t.name, type=t.get_type_name(), value=t.value) for t in pecan.request.storage_conn .get_traits(event_type, trait_name)] @requires_admin @wsme_pecan.wsexpose([TraitDescription], wtypes.text) 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 = storage.models.Trait.get_name_by_type return [TraitDescription(name=t['name'], type=get_trait_name(t['data_type'])) for t in pecan.request.storage_conn .get_trait_types(event_type)] class EventTypesController(rest.RestController): """Works on Event Types in the system.""" traits = TraitsController() @pecan.expose() def get_one(self, event_type): pecan.abort(404) @requires_admin @wsme_pecan.wsexpose([unicode]) def get_all(self): """Get all event types. """ return list(pecan.request.storage_conn.get_event_types()) class EventsController(rest.RestController): """Works on Events.""" @requires_admin @wsme_pecan.wsexpose([Event], [EventQuery]) def get_all(self, q=[]): """Return all events matching the query filters. :param q: Filter arguments for which Events to return """ 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) for event in pecan.request.storage_conn.get_events(event_filter)] @requires_admin @wsme_pecan.wsexpose(Event, wtypes.text) 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 """ event_filter = storage.EventFilter(message_id=message_id) events = pecan.request.storage_conn.get_events(event_filter) if not events: raise 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) class V2Controller(object): """Version 2 API controller root.""" resources = ResourcesController() meters = MetersController() samples = SamplesController() alarms = AlarmsController() event_types = EventTypesController() events = EventsController()