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Multi datasource support for Basic Consolidation

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In this changeset, I added the support for both Monasca and
Ceilometer for the basic_consolidation strategy.

Partially Implements: blueprint monasca-support

Change-Id: Ide98550fbf4a29954e46650190a05be1b8800317
This commit is contained in:
Vincent Françoise
2016-12-23 16:40:39 +01:00
parent a015af1bd2
commit 4235ef7c24
12 changed files with 472 additions and 90 deletions
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28
doc/source/dev/plugin/strategy-plugin.rst
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@@ -245,22 +245,30 @@ Querying metrics
A large set of metrics, generated by OpenStack modules, can be used in your
strategy implementation. To collect these metrics, Watcher provides a
`Helper`_ to the Ceilometer API, which makes this API reusable and easier
to used.
`Helper`_ for two data sources which are `Ceilometer`_ and `Monasca`_. If you
wish to query metrics from a different data source, you can implement your own
and directly use it from within your new strategy. Indeed, strategies in
Watcher have the cluster data models decoupled from the data sources which
means that you may keep the former while changing the latter.
The recommended way for you to support a new data source is to implement a new
helper that would encapsulate within separate methods the queries you need to
perform. To then use it, you would just have to instantiate it within your
strategy.
If you want to use your own metrics database backend, please refer to the
`Ceilometer developer guide`_. Indeed, Ceilometer's pluggable model allows
for various types of backends. A list of the available backends is located
here_. The Ceilosca project is a good example of how to create your own
pluggable backend.
If you want to use Ceilometer but with your own metrics database backend,
please refer to the `Ceilometer developer guide`_. The list of the available
Ceilometer backends is located here_. The `Ceilosca`_ project is a good example
of how to create your own pluggable backend. Moreover, if your strategy
requires new metrics not covered by Ceilometer, you can add them through a
`Ceilometer plugin`_.
Finally, if your strategy requires new metrics not covered by Ceilometer, you
can add them through a Ceilometer `plugin`_.
.. _`Helper`: https://github.com/openstack/watcher/blob/master/watcher/decision_engine/cluster/history/ceilometer.py
.. _`Ceilometer developer guide`: http://docs.openstack.org/developer/ceilometer/architecture.html#storing-the-data
.. _`Ceilometer`: http://docs.openstack.org/developer/ceilometer/
.. _`Monasca`: https://github.com/openstack/monasca-api/blob/master/docs/monasca-api-spec.md
.. _`here`: http://docs.openstack.org/developer/ceilometer/install/dbreco.html#choosing-a-database-backend
.. _`plugin`: http://docs.openstack.org/developer/ceilometer/plugins.html
.. _`Ceilometer plugin`: http://docs.openstack.org/developer/ceilometer/plugins.html
.. _`Ceilosca`: https://github.com/openstack/monasca-ceilometer/blob/master/ceilosca/ceilometer/storage/impl_monasca.py