Refactor options to enabled backends

Aodh can use only one database so having multiple options per backend
software is very redundant.

Also, gnocchi and prometheus are used for the same purpose so can use
a single option instead.

Change-Id: I134cf61d8137409ef5f5d959177e349781110eaa

.zuul.yaml

@@ -54,8 +54,7 @@
             service_available:
               sg-core: True
             telemetry_services:
-              aodh_gnocchi: True
-              aodh_prometheus: True
+              metric_backends: gnocchi,prometheus
             telemetry:
               disable_ssl_certificate_validation: True
       tempest_test_regex: telemetry_tempest_plugin

telemetry_tempest_plugin/aodh/api/gnocchi/test_alarming_api.py

@@ -29,7 +29,7 @@ class TelemetryAlarmingAPIGnocchiTest(base.BaseAlarmingTest):
         """
 
         super(TelemetryAlarmingAPIGnocchiTest, cls).skip_checks()
-        if not CONF.telemetry_services.aodh_gnocchi:
+        if 'gnocchi' not in CONF.telemetry_services.metric_backends:
             msg = ("%s: Skipping Gnocchi specific tests withouth Gnocchi" %
                    cls.__name__)
             raise cls.skipException(msg)

telemetry_tempest_plugin/aodh/api/gnocchi/test_alarming_api_negative.py

@@ -39,7 +39,7 @@ class TelemetryAlarmingNegativeGnocchiTest(base.BaseAlarmingTest):
         """
 
         super(TelemetryAlarmingNegativeGnocchiTest, cls).skip_checks()
-        if not CONF.telemetry_services.aodh_gnocchi:
+        if 'gnocchi' not in CONF.telemetry_services.metric_backends:
             msg = ("%s: Skipping Gnocchi specific tests withouth Gnocchi" %
                    cls.__name__)
             raise cls.skipException(msg)

telemetry_tempest_plugin/aodh/api/sql/test_alarming_api.py

@@ -31,7 +31,7 @@ class TelemetryAlarmingAPIMysqlTest(base.BaseAlarmingTest):
         """
 
         super(TelemetryAlarmingAPIMysqlTest, cls).skip_checks()
-        if not CONF.telemetry_services.aodh_mysql:
+        if CONF.telemetry_services.alarm_backend != 'mysql':
             msg = ("%s: Skipping mysql specific tests withouth mysql" %
                    cls.__name__)
             raise cls.skipException(msg)

telemetry_tempest_plugin/config.py

@@ -14,6 +14,7 @@
 #    under the License.
 
 from oslo_config import cfg
+from oslo_config import types
 
 
 service_option = [cfg.BoolOpt('ceilometer',
@@ -86,18 +87,14 @@ TelemetryGroup = [
 ]
 
 telemetry_services_opts = [
-    cfg.BoolOpt('aodh_gnocchi',
-                default=False,
-                help="Can telemetry plugin expect gnocchi backend"),
-    cfg.BoolOpt('aodh_mysql',
-                default=False,
-                help="Can telemetry plugin expect mysql backend"),
-    cfg.BoolOpt('aodh_postgre',
-                default=False,
-                help="Can telemetry plugin expect postgre backend"),
-    cfg.BoolOpt('aodh_prometheus',
-                default=False,
-                help="Can telemetry plugin expect prometheus backend"),
+    cfg.ListOpt('metric_backends',
+                default=[],
+                item_type=types.String(choices=['gnocchi', 'prometheus']),
+                help="Backend store used to store metrics"),
+    cfg.StrOpt('alarm_backend',
+               default='mysql',
+               choices=['mysql', 'postgresq'],
+               help="Database used by the aodh service"),
 ]
 
 event_opts = [