Add CeilometerAlarms.create_and_get_alarm

Create and get the newly created alarm.

These scenarios test GET /v2/alarms/(alarm_id)
Initially alarm is created and then its detailed information is
fetched using its alarm_id.

Change-Id: I3320df227bd963890e4be8765569dbd82329ff4d

rally-jobs/unstable-neutron.yaml

@@ -156,6 +156,28 @@
         failure_rate:
           max: 0
 
+  CeilometerAlarms.create_and_get_alarm:
+    -
+      args:
+        meter_name: "ram_util"
+        threshold: 10.0
+        type: "threshold"
+        statistic: "avg"
+        alarm_actions: ["http://localhost:8776/alarm"]
+        ok_actions: ["http://localhost:8776/ok"]
+        insufficient_data_actions: ["http://localhost:8776/notok"]
+      runner:
+        type: "constant"
+        times: 10
+        concurrency: 2
+      context:
+        users:
+          tenants: 2
+          users_per_tenant: 2
+      sla:
+        failure_rate:
+          max: 0
+
   CeilometerAlarms.create_and_update_alarm:
     -
       args:

rally/plugins/openstack/scenarios/ceilometer/alarms.py

@@ -79,6 +79,30 @@ class CreateAndListAlarm(ceiloutils.CeilometerScenario):
         self._list_alarms(alarm.alarm_id)
 
 
+@validation.required_services(consts.Service.CEILOMETER)
+@validation.required_openstack(users=True)
+@scenario.configure(context={"cleanup": ["ceilometer"]},
+                    name="CeilometerAlarms.create_and_get_alarm")
+class CreateAndGetAlarm(ceiloutils.CeilometerScenario):
+
+    def run(self, meter_name, threshold, **kwargs):
+        """Create and get the newly created alarm.
+
+        These scenarios test GET /v2/alarms/(alarm_id)
+        Initially an alarm is created and then its detailed information is
+        fetched using its alarm_id. meter_name and threshold are required
+        parameters for alarm creation. kwargs stores other optional parameters
+        like 'ok_actions', 'project_id' etc. that may be passed while creating
+        an alarm.
+
+        :param meter_name: specifies meter name of the alarm
+        :param threshold: specifies alarm threshold
+        :param kwargs: specifies optional arguments for alarm creation.
+        """
+        alarm = self._create_alarm(meter_name, threshold, kwargs)
+        self._get_alarm(alarm.alarm_id)
+
+
 @validation.required_services(consts.Service.CEILOMETER)
 @validation.required_openstack(users=True)
 @scenario.configure(context={"cleanup": ["ceilometer"]},

rally/plugins/openstack/scenarios/ceilometer/utils.py

@@ -187,6 +187,16 @@ class CeilometerScenario(scenario.OpenStackScenario):
         else:
             return self.clients("ceilometer").alarms.list()
 
+    @atomic.action_timer("ceilometer.get_alarm")
+    def _get_alarm(self, alarm_id):
+        """Get detailed information of an alarm.
+
+        :param alarm_id: Specifies id of the alarm
+        :returns: If alarm_id is existed and correct, returns
+                  detailed information of an alarm, else returns None
+        """
+        return self.clients("ceilometer").alarms.get(alarm_id)
+
     @atomic.action_timer("ceilometer.create_alarm")
     def _create_alarm(self, meter_name, threshold, kwargs):
         """Create an alarm.

samples/tasks/scenarios/ceilometer/create-and-get-alarm.json

@@ -0,0 +1,31 @@
+{
+    "CeilometerAlarms.create_and_get_alarm": [
+        {
+            "args": {
+                "meter_name": "ram_util",
+                "threshold": 10.0,
+                "type": "threshold",
+                "statistic": "avg",
+                "alarm_actions": ["http://localhost:8776/alarm"],
+                "ok_actions": ["http://localhost:8776/ok"],
+                "insufficient_data_actions": ["http://localhost:8776/notok"]
+            },
+            "runner": {
+                "type": "constant",
+                "times": 10,
+                "concurrency": 2
+            },
+            "context": {
+                "users": {
+                    "tenants": 2,
+                    "users_per_tenant": 2
+                }
+            },
+            "sla": {
+                "failure_rate": {
+                    "max": 0
+                }
+            }
+        }
+    ]
+}

samples/tasks/scenarios/ceilometer/create-and-get-alarm.yaml

@@ -0,0 +1,22 @@
+---
+  CeilometerAlarms.create_and_get_alarm:
+    -
+      args:
+        meter_name: "ram_util"
+        threshold: 10.0
+        type: "threshold"
+        statistic: "avg"
+        alarm_actions: ["http://localhost:8776/alarm"]
+        ok_actions: ["http://localhost:8776/ok"]
+        insufficient_data_actions: ["http://localhost:8776/notok"]
+      runner:
+        type: "constant"
+        times: 10
+        concurrency: 2
+      context:
+        users:
+          tenants: 2
+          users_per_tenant: 2
+      sla:
+        failure_rate:
+          max: 0

tests/unit/plugins/openstack/scenarios/ceilometer/test_alarms.py

@@ -47,6 +47,18 @@ class CeilometerAlarmsTestCase(test.ScenarioTestCase):
                                                        {"fakearg": "f"})
         scenario._list_alarms.assert_called_once_with(fake_alarm.alarm_id)
 
+    def test_create_and_get_alarm(self):
+        fake_alarm = mock.MagicMock()
+        scenario = alarms.CreateAndGetAlarm(self.context)
+
+        scenario._create_alarm = mock.MagicMock(return_value=fake_alarm)
+        scenario._get_alarm = mock.MagicMock()
+        scenario.run("fake_meter_name", "fake_threshold", fakearg="f")
+        scenario._create_alarm.assert_called_once_with("fake_meter_name",
+                                                       "fake_threshold",
+                                                       {"fakearg": "f"})
+        scenario._get_alarm.assert_called_once_with(fake_alarm.alarm_id)
+
     def test_create_and_update_alarm(self):
         fake_alram_dict_diff = {"description": "Changed Test Description"}
         fake_alarm = mock.MagicMock()

tests/unit/plugins/openstack/scenarios/ceilometer/test_utils.py

@@ -107,6 +107,14 @@ class CeilometerScenarioTestCase(test.ScenarioTestCase):
         self._test_atomic_action_timer(self.scenario.atomic_actions(),
                                        "ceilometer.list_alarms")
 
+    def test__get_alarm(self):
+        self.assertEqual(self.clients("ceilometer").alarms.get.return_value,
+                         self.scenario._get_alarm("alarm-id"))
+        self.clients("ceilometer").alarms.get.assert_called_once_with(
+            "alarm-id")
+        self._test_atomic_action_timer(self.scenario.atomic_actions(),
+                                       "ceilometer.get_alarm")
+
     def test__create_alarm(self):
         alarm_dict = {"alarm_id": "fake-alarm-id"}
         orig_alarm_dict = copy.copy(alarm_dict)