Add nova.ListAndGetHypervisors

The scenario fist list all hypervisors,then get detailed information
of the listed hypervisors in trun.

Change-Id: I62d10ba42c7dfdfa75e61a04af7028deb99bbdfb

rally-jobs/nova.yaml

@@ -642,6 +642,23 @@
         failure_rate:
           max: 0
 
+
+  NovaHypervisors.list_and_get_hypervisors:
+    -
+      args:
+        detailed: True
+      runner:
+        type: "constant"
+        times: 5
+        concurrency: 2
+      context:
+        users:
+          tenants: 2
+          users_per_tenant: 2
+      sla:
+        failure_rate:
+          max: 0
+
   NovaImages.list_images:
     -
       args:

rally/plugins/openstack/scenarios/nova/hypervisors.py

@@ -16,6 +16,7 @@
 from rally import consts
 from rally.plugins.openstack import scenario
 from rally.plugins.openstack.scenarios.nova import utils
+from rally.task import atomic
 from rally.task import validation
 
 
@@ -34,3 +35,26 @@ class NovaHypervisors(utils.NovaScenario):
                          detailed information about all of them
         """
         self._list_hypervisors(detailed)
+
+
+@validation.required_services(consts.Service.NOVA)
+@validation.required_openstack(admin=True)
+@scenario.configure(name="NovaHypervisors.list_and_get_hypervisors")
+class ListAndGetHypervisors(utils.NovaScenario):
+    """Benchmark scenario for Nova hypervisors."""
+    def run(self, detailed=True):
+        """List and Get hypervisors.
+
+        The scenario fist list all hypervisors,then get detailed information
+        of the listed hypervisors in trun.
+
+        Measure the "nova hypervisor-show" command performance.
+
+        :param detailed: True if the hypervisor listing should contain
+                         detailed information about all of them
+        """
+        hypervisors = self._list_hypervisors(detailed)
+
+        with atomic.ActionTimer(self, "nova.get_hypervisor"):
+            for hypervisor in hypervisors:
+                self._get_hypervisor(hypervisor)

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

@@ -863,6 +863,18 @@ class NovaScenario(scenario.OpenStackScenario):
         """List hypervisors."""
         return self.admin_clients("nova").hypervisors.list(detailed)
 
+    @atomic.optional_action_timer("nova.get_hypervisor")
+    def _get_hypervisor(self, hypervisor):
+        """Get a specific hypervisor.
+
+        :param hypervisor: Hypervisor to get.
+        :param atomic_action: True if this is atomic action. added and
+                              handled by the optional_action_timer()
+                              decorator.
+        :returns: Hypervisor object
+        """
+        return self.admin_clients("nova").hypervisors.get(hypervisor)
+
     @atomic.action_timer("nova.lock_server")
     def _lock_server(self, server):
         """Lock the given server.

samples/tasks/scenarios/nova/list-and-get-hypervisors.json

@@ -0,0 +1,25 @@
+{
+  "NovaHypervisors.list_and_get_hypervisors": [
+    {
+      "args": {
+        "detailed": true
+      },
+      "runner": {
+        "type": "constant",
+        "concurrency": 2,
+        "times": 2
+      },
+      "context": {
+        "users": {
+          "tenants": 3,
+          "users_per_tenant": 2
+        }
+      },
+      "sla": {
+        "failure_rate": {
+          "max": 0
+        }
+      }
+    }
+  ]
+}

samples/tasks/scenarios/nova/list-and-get-hypervisors.yaml

@@ -0,0 +1,16 @@
+---
+  NovaHypervisors.list_and_get_hypervisors:
+    -
+      args:
+        detailed: True
+      runner:
+        type: "constant"
+        times: 2
+        concurrency: 2
+      context:
+        users:
+          tenants: 3
+          users_per_tenant: 2
+      sla:
+        failure_rate:
+          max: 0

tests/unit/plugins/openstack/scenarios/nova/test_hypervisors.py

@@ -29,3 +29,15 @@ class NovaHypervisorsTestCase(test.ScenarioTestCase):
         scenario._list_hypervisors = mock.Mock()
         scenario.list_hypervisors(detailed=False)
         scenario._list_hypervisors.assert_called_once_with(False)
+
+    def test_list_and_get_hypervisors(self):
+        scenario = hypervisors.ListAndGetHypervisors(self.context)
+        scenario._list_hypervisors = mock.MagicMock(detailed=False)
+        scenario._get_hypervisor = mock.MagicMock()
+        scenario.run(detailed=False)
+
+        scenario._list_hypervisors.assert_called_once_with(False)
+        for hypervisor in scenario._list_hypervisors.return_value:
+            scenario._get_hypervisor.assert_called_once_with(hypervisor)
+        self._test_atomic_action_timer(scenario.atomic_actions(),
+                                       "nova.get_hypervisor")

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

@@ -841,6 +841,18 @@ class NovaScenarioTestCase(test.ScenarioTestCase):
         self._test_atomic_action_timer(nova_scenario.atomic_actions(),
                                        "nova.list_hypervisors")
 
+    def test__get_hypervisor(self):
+        hypervisor = mock.Mock()
+        nova_scenario = utils.NovaScenario()
+        result = nova_scenario._get_hypervisor(hypervisor)
+        self.assertEqual(
+            self.admin_clients("nova").hypervisors.get.return_value,
+            result)
+        self.admin_clients("nova").hypervisors.get.assert_called_once_with(
+            hypervisor)
+        self._test_atomic_action_timer(nova_scenario.atomic_actions(),
+                                       "nova.get_hypervisor")
+
     def test__list_images(self):
         nova_scenario = utils.NovaScenario()
         result = nova_scenario._list_images(detailed=False, fakearg="fakearg")