Eoghan Glynn cdc49d6c75 Selectable aggregation functions for statistics ...

Addresses: BP selectable-aggregates

Previously, the statistics API always computed and returned a
standard set of aggregate functions.

Now, individual aggregation functions can be selected and even
parameterized via syntax of form:

   /v2/meters/<meter_name>/statistics?aggregate.func=<name>&aggregate.param=<value>

For example in order to calculate the average CPU util only:

  GET /v2/meters/cpu_util/statistics?aggregate.func=avg

  HTTP/1.0 200 OK
  [{"aggregate": {"avg": 0.6858829535841072},
    "avg": 0.6858829535841072,
    "duration_start": "2014-01-30T11:13:23",
    "duration_end": "2014-01-31T16:07:13",
    "duration": 104030.0,
    "period": 0,
    "period_start": "2014-01-30T11:13:23",
    "period_end": "2014-01-31T16:07:13",
    "groupby": null,
    "unit": "%"}]

In the current patch, selectable aggregates are provided by the
sqlalchemy driver only, with support in the mongodb driver to
follow in a subsequent patch.

Change-Id: I6cc095ba5ae16dea3f6b404e72a070ab9ac49c9a

2014-03-03 21:23:22 +00:00

..

alarm

Merge "Use six.moves.urllib.parse instead of urlparse"

2014-02-15 07:31:24 +00:00

api

Selectable aggregation functions for statistics

2014-03-03 21:23:22 +00:00

central

Pluggable resource discovery for agents

2014-02-26 15:43:32 +00:00

compute

Merge "Remove unused variable"

2014-02-28 23:14:52 +00:00

dispatcher

Improve help strings

2014-02-08 06:46:32 +01:00

energy

Added resources support in pollster's interface

2014-01-20 09:38:18 +08:00

event

Adds gettextutils module in converter

2014-02-17 16:25:33 +08:00

hardware

Added hardware pollsters for the central agent

2014-02-27 13:08:45 +08:00

image

Propogate cacert and insecure flags to glanceclient

2014-02-11 17:08:17 +00:00

locale

Imported Translations from Transifex

2014-02-26 06:06:19 +00:00

network

Implements monitoring-network

2014-02-19 01:13:52 +00:00

objectstore

Use six.moves.urllib.parse instead of urlparse

2014-02-12 09:38:36 +08:00

openstack

Sync latest config file generator from oslo-incubator

2014-02-25 01:53:42 +00:00

orchestration

Handle Heat notifications for stack CRUD

2014-02-18 18:48:52 +01:00

publisher

Use six.moves.urllib.parse instead of urlparse

2014-02-12 09:38:36 +08:00

storage

Selectable aggregation functions for statistics

2014-03-03 21:23:22 +00:00

tests

Selectable aggregation functions for statistics

2014-03-03 21:23:22 +00:00

transformer

Name and unit mapping for rate_of_change transformer

2014-01-17 10:03:22 +00:00

volume

Improve help strings

2014-02-08 06:46:32 +01:00

__init__.py

Empty files should no longer contain copyright

2013-12-24 20:19:04 +08:00

agent.py

Pluggable resource discovery for agents

2014-02-26 15:43:32 +00:00

cli.py

Improve help strings

2014-02-08 06:46:32 +01:00

collector.py

Use the module units to refer bytes type

2014-02-19 18:46:25 +08:00

middleware.py

Improve help strings

2014-02-08 06:46:32 +01:00

notification.py

Improve help strings

2014-02-08 06:46:32 +01:00

notifier.py

Add i18n warpping for all LOG messages

2013-11-29 21:09:53 +08:00

nova_client.py

Remove None for dict.get()

2014-02-14 22:31:32 +08:00

pipeline.py

remove audit logging on flush

2014-02-25 14:15:55 -05:00

plugin.py

Pluggable resource discovery for agents

2014-02-26 15:43:32 +00:00

sample.py

Improve help strings

2014-02-08 06:46:32 +01:00

service.py

Set default log level of iso8601 to WARN

2014-02-25 10:49:05 +08:00

utils.py

Add simple capabilities API

2014-03-03 19:52:16 +00:00