Add spec for the bp:add-ceilometer-scenario-tests

Partially implements: blueprint add-ceilometer-scenario-tests
Change-Id: Id6dff341fbda9eb75276ee969c52fb2513c6fa4b

specs/add-ceilometer-scenario-tests.rst

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+::
+
+ This work is licensed under a Creative Commons Attribution 3.0 Unported
+ License.
+
+ http://creativecommons.org/licenses/by/3.0/legalcode
+
+..
+
+=============================
+Add Ceilometer scenario tests
+=============================
+
+https://blueprints.launchpad.net/tempest/+spec/add-ceilometer-scenario-tests
+
+Implement complex scenario tests for the Ceilometer project.
+Related Etherpad: https://etherpad.openstack.org/p/ceilometer-tempest-testing
+
+Problem description
+===================
+
+Telemetry project uses complex interactions inside the OpenStack cloud, so it's
+needed to test not only basic Ceilometer capabilities via API testing, but also
+more complex scenarios that might happen in the cloud. In this case scenarios
+integration tests need to be implemented.
+
+Proposed change
+===============
+
+This blueprint contains the following steps to be implemented:
+
+1. Initial Tempest and Ceilometer integration for the scenario tests
+2. Scenario tests themselves (we need to start with the alarms and events
+   testing)
+
+   Simple alarms test, for example, will follow next scenario:
+   - create alarm which triggered to 'alarm' state and send callback by
+   alarm_actions if in last period more then one server had been created,
+   - create one server,
+   - check that alarm triggered to state 'ok',
+   - create two servers,
+   - check that alarm triggered to state 'alarm',
+   - check that alarms callback received.
+
+   Simple events test will look like the following:
+   - choose some action for every OpenStack service (like keypair
+   creation in Nova) that should lead to notification sent and then event
+   created, each action is followed by specific order of
+   notifications and special order of events as well,
+   - check events come and their order.
+
+Alternatives
+------------
+
+None
+
+Implementation
+==============
+
+Assignee(s)
+-----------
+
+Primary assignee:
+  * Artur Svechnikov <asvechnikov@mirantis.com>
+
+Milestones
+----------
+
+Target Milestone for completion:
+  Juno-2
+
+Work Items
+----------
+
+* [asvechnikov] Add Ceilometer client for scenarios tests: DONE
+* [asvechnikov] Add Ceilometer events scenarios tests: INPROGRESS
+* [asvechnikov] Add Ceilometer alarms scenarios tests: INPROGRESS