openstack/aodh
Code Issues Proposed changes
aodh/ceilometer/api/v1.py
Doug Hellmann d25a3147c1 Implement duration calculation API 
Add the API for calculating the duration for a series of
events from a given meter for a given resource.

Replace the old duration calculation in the storage engine API with
get_event_interval().

Change-Id: I54952e760fc5e108fa25d71b601b7ef2a4937e9e
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
2012-09-05 08:11:55 -04:00

399 lines
13 KiB
Python
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# -*- encoding: utf-8 -*-
#
# Copyright © 2012 New Dream Network, LLC (DreamHost)
#
# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
#
# 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.
"""Blueprint for version 1 of API.
"""
# [ ] / -- information about this version of the API
#
# [ ] /extensions -- list of available extensions
# [ ] /extensions/<extension> -- details about a specific extension
#
# [ ] /sources -- list of known sources (where do we get this?)
# [ ] /sources/components -- list of components which provide metering
# data (where do we get this)?
#
# [x] /projects/<project>/resources -- list of resource ids
# [x] /resources -- list of resource ids
# [x] /sources/<source>/resources -- list of resource ids
# [x] /users/<user>/resources -- list of resource ids
#
# [x] /users -- list of user ids
# [x] /sources/<source>/users -- list of user ids
#
# [x] /projects -- list of project ids
# [x] /sources/<source>/projects -- list of project ids
#
# [ ] /resources/<resource> -- metadata
#
# [ ] /projects/<project>/meters -- list of meters reporting for parent obj
# [ ] /resources/<resource>/meters -- list of meters reporting for parent obj
# [ ] /sources/<source>/meters -- list of meters reporting for parent obj
# [ ] /users/<user>/meters -- list of meters reporting for parent obj
#
# [x] /projects/<project>/meters/<meter> -- events
# [x] /resources/<resource>/meters/<meter> -- events
# [x] /sources/<source>/meters/<meter> -- events
# [x] /users/<user>/meters/<meter> -- events
#
# [ ] /projects/<project>/meters/<meter>/duration -- total time for selected
# meter
# [x] /resources/<resource>/meters/<meter>/duration -- total time for selected
# meter
# [ ] /sources/<source>/meters/<meter>/duration -- total time for selected
# meter
# [ ] /users/<user>/meters/<meter>/duration -- total time for selected meter
#
# [ ] /projects/<project>/meters/<meter>/volume -- total or max volume for
# selected meter
# [ ] /resources/<resource>/meters/<meter>/volume -- total or max volume for
# selected meter
# [ ] /sources/<source>/meters/<meter>/volume -- total or max volume for
# selected meter
# [ ] /users/<user>/meters/<meter>/volume -- total or max volume for selected
# meter
import datetime
import flask
from ceilometer.openstack.common import log
from ceilometer.openstack.common import timeutils
from ceilometer import storage
LOG = log.getLogger(__name__)
blueprint = flask.Blueprint('v1', __name__)
## APIs for working with resources.
def _list_resources(source=None, user=None, project=None,
start_timestamp=None, end_timestamp=None):
"""Return a list of resource identifiers.
"""
if start_timestamp:
start_timestamp = timeutils.parse_isotime(start_timestamp)
if end_timestamp:
end_timestamp = timeutils.parse_isotime(end_timestamp)
resources = flask.request.storage_conn.get_resources(
source=source,
user=user,
project=project,
start_timestamp=start_timestamp,
end_timestamp=end_timestamp,
)
return flask.jsonify(resources=list(resources))
@blueprint.route('/projects/<project>/resources')
def list_resources_by_project(project):
"""Return a list of resources owned by the project.
:param project: The ID of the owning project.
:param start_timestamp: Limits resources by last update time >= this value.
(optional)
:type start_timestamp: ISO date in UTC
:param end_timestamp: Limits resources by last update time < this value.
(optional)
:type end_timestamp: ISO date in UTC
"""
return _list_resources(
project=project,
start_timestamp=flask.request.args.get('start_timestamp'),
end_timestamp=flask.request.args.get('end_timestamp'),
)
@blueprint.route('/resources')
def list_all_resources():
"""Return a list of all known resources.
:param start_timestamp: Limits resources by last update time >= this value.
(optional)
:type start_timestamp: ISO date in UTC
:param end_timestamp: Limits resources by last update time < this value.
(optional)
:type end_timestamp: ISO date in UTC
"""
return _list_resources()
@blueprint.route('/sources/<source>/resources')
def list_resources_by_source(source):
"""Return a list of resources for which a source is reporting
data.
:param source: The ID of the reporting source.
:param start_timestamp: Limits resources by last update time >= this value.
(optional)
:type start_timestamp: ISO date in UTC
:param end_timestamp: Limits resources by last update time < this value.
(optional)
:type end_timestamp: ISO date in UTC
"""
return _list_resources(source=source)
@blueprint.route('/users/<user>/resources')
def list_resources_by_user(user):
"""Return a list of resources owned by the user.
:param user: The ID of the owning user.
:param start_timestamp: Limits resources by last update time >= this value.
(optional)
:type start_timestamp: ISO date in UTC
:param end_timestamp: Limits resources by last update time < this value.
(optional)
:type end_timestamp: ISO date in UTC
"""
return _list_resources(user=user)
## APIs for working with users.
def _list_users(source=None):
"""Return a list of user names.
"""
users = flask.request.storage_conn.get_users(source=source)
return flask.jsonify(users=list(users))
@blueprint.route('/users')
def list_all_users():
"""Return a list of all known user names.
"""
return _list_users()
@blueprint.route('/sources/<source>/users')
def list_users_by_source(source):
"""Return a list of the users for which the source is reporting
data.
:param source: The ID of the source.
"""
return _list_users(source=source)
## APIs for working with projects.
def _list_projects(source=None):
"""Return a list of project names.
"""
projects = flask.request.storage_conn.get_projects(source=source)
return flask.jsonify(projects=list(projects))
@blueprint.route('/projects')
def list_all_projects():
"""Return a list of all known project names.
"""
return _list_projects()
@blueprint.route('/sources/<source>/projects')
def list_projects_by_source(source):
"""Return a list project names for which the source is reporting
data.
:param source: The ID of the source.
"""
return _list_projects(source=source)
## APIs for working with events.
def _list_events(project=None,
resource=None,
source=None,
user=None,
meter=None,
):
"""Return a list of raw metering events.
"""
f = storage.EventFilter(user=user,
project=project,
source=source,
meter=meter,
resource=resource,
)
events = flask.request.storage_conn.get_raw_events(f)
return flask.jsonify(events=list(events))
@blueprint.route('/projects/<project>/meters/<meter>')
def list_events_by_project(project, meter):
"""Return a list of raw metering events for the project.
:param project: The ID of the project.
:param meter: The name of the meter.
:param start_timestamp: Limits events by timestamp >= this value.
(optional)
:type start_timestamp: ISO date in UTC
:param end_timestamp: Limits events by timestamp < this value.
(optional)
:type end_timestamp: ISO date in UTC
"""
return _list_events(project=project,
meter=meter,
)
@blueprint.route('/resources/<resource>/meters/<meter>')
def list_events_by_resource(resource, meter):
"""Return a list of raw metering events for the resource.
:param resource: The ID of the resource.
:param meter: The name of the meter.
:param start_timestamp: Limits events by timestamp >= this value.
(optional)
:type start_timestamp: ISO date in UTC
:param end_timestamp: Limits events by timestamp < this value.
(optional)
:type end_timestamp: ISO date in UTC
"""
return _list_events(resource=resource,
meter=meter,
)
@blueprint.route('/sources/<source>/meters/<meter>')
def list_events_by_source(source, meter):
"""Return a list of raw metering events for the source.
:param source: The ID of the reporting source.
:param meter: The name of the meter.
:param start_timestamp: Limits events by timestamp >= this value.
(optional)
:type start_timestamp: ISO date in UTC
:param end_timestamp: Limits events by timestamp < this value.
(optional)
:type end_timestamp: ISO date in UTC
"""
return _list_events(source=source,
meter=meter,
)
@blueprint.route('/users/<user>/meters/<meter>')
def list_events_by_user(user, meter):
"""Return a list of raw metering events for the user.
:param user: The ID of the user.
:param meter: The name of the meter.
:param start_timestamp: Limits events by timestamp >= this value.
(optional)
:type start_timestamp: ISO date in UTC
:param end_timestamp: Limits events by timestamp < this value.
(optional)
:type end_timestamp: ISO date in UTC
"""
return _list_events(user=user,
meter=meter,
)
## APIs for working with meter calculations.
@blueprint.route('/resources/<resource>/meters/<meter>/duration')
def compute_duration_by_resource(resource, meter):
"""Return the earliest timestamp, last timestamp,
and duration for the resource and meter.
:param resource: The ID of the resource.
:param meter: The name of the meter.
:param start_timestamp: ISO-formatted string of the
earliest timestamp to return.
:param end_timestamp: ISO-formatted string of the
latest timestamp to return.
:param search_offset: Number of minutes before
and after start and end timestamps to query.
"""
# 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]
search_offset = int(flask.request.args.get('search_offset', 0))
start_timestamp = flask.request.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 = flask.request.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
# Query the database for the interval of timestamps
# within the desired range.
f = storage.EventFilter(meter=meter,
resource=resource,
start=query_start,
end=query_end,
)
min_ts, max_ts = flask.request.storage_conn.get_event_interval(f)
# "Clamp" the timestamps we return to the original time
# range, excluding the offset.
LOG.debug('start_timestamp %s, end_timestamp %s, min_ts %s, max_ts %s',
start_timestamp, end_timestamp, min_ts, max_ts)
if start_timestamp and min_ts and min_ts < start_timestamp:
min_ts = start_timestamp
LOG.debug('clamping min timestamp to range')
if end_timestamp and max_ts and max_ts > end_timestamp:
max_ts = end_timestamp
LOG.debug('clamping max timestamp to range')
# If we got valid timestamps back, compute a duration in minutes.
#
# If the min > max after clamping then we know the
# timestamps on the events 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 min_ts and max_ts and (min_ts <= max_ts):
# Can't use timedelta.total_seconds() because
# it is not available in Python 2.6.
diff = max_ts - min_ts
duration = (diff.seconds + (diff.days * 24 * 60 ** 2)) / 60
else:
min_ts = max_ts = duration = None
return flask.jsonify(start_timestamp=min_ts,
end_timestamp=max_ts,
duration=duration,
)
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