Dantali0n e76c20d1c5 Improve exceptions and logging in ds manager
MetricNotAvailable and NoDatasourceAvailable allow to differentiate
between having no datasources configured and a required metric being
unavailable from the datasource. Both exceptions have comments so
that the use case is clear.

The input validation of the get_backend method in the datasource
manager is improved.

Additional logging information allows to identify which metric caused
the available datasource to be discarded.

Tests are updated to validate the correct functionality of the new
exceptions.

Change-Id: I512976cce2401dbcd249d42686b78843e111a0e7
2019-05-21 20:11:20 +02:00
2019-01-24 16:01:19 +08:00
2017-12-11 15:19:10 +03:00
2018-02-14 16:45:13 +09:00
2018-10-29 08:45:32 +00:00
2019-04-19 19:40:45 +00:00
2015-06-04 15:27:57 +02:00
2018-07-10 15:38:50 +07:00
2019-04-30 16:02:32 +08:00
2015-06-04 15:27:57 +02:00
2017-04-07 10:55:59 +08:00
2018-02-28 03:58:07 +00:00
2015-06-04 15:27:57 +02:00
2019-04-23 13:20:10 +02:00
2019-05-09 11:14:40 -04:00
2019-04-16 16:24:53 +08:00
2017-03-07 02:08:03 +00:00

========================
Team and repository tags
========================

.. image:: https://governance.openstack.org/tc/badges/watcher.svg
    :target: https://governance.openstack.org/tc/reference/tags/index.html

.. Change things from this point on

..
      Except where otherwise noted, this document is licensed under Creative
      Commons Attribution 3.0 License.  You can view the license at:

          https://creativecommons.org/licenses/by/3.0/

=======
Watcher
=======

OpenStack Watcher provides a flexible and scalable resource optimization
service for multi-tenant OpenStack-based clouds.
Watcher provides a robust framework to realize a wide range of cloud
optimization goals, including the reduction of data center
operating costs, increased system performance via intelligent virtual machine
migration, increased energy efficiency and more!

* Free software: Apache license
* Wiki: https://wiki.openstack.org/wiki/Watcher
* Source: https://opendev.org/openstack/watcher
* Bugs: https://bugs.launchpad.net/watcher
* Documentation: https://docs.openstack.org/watcher/latest/
* Release notes: https://docs.openstack.org/releasenotes/watcher/
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