Add "suspend and resume" scenario for Nova

This scenario covers cerate a server, suspend,
resume and then delete server

Change-Id: I22dd2bd4d148bc727dc30a3703211043526b9b47

etc/rally/rally.conf.sample

@@ -280,6 +280,16 @@
 # Server suspend poll interval (floating point value)
 #nova_server_suspend_poll_interval = 2.0
 
+# Time to sleep after resume before polling for status (floating
+# point value)
+#nova_server_resume_prepoll_delay = 2.0
+
+# Server resume timeout (floating point value)
+#nova_server_resume_timeout = 300.0
+
+# Server resume poll interval (floating point value)
+#nova_server_resume_poll_interval = 2.0
+
 # Time to sleep after image_create before polling for status (floating
 # point value)
 #nova_server_image_create_prepoll_delay = 0.0

rally-jobs/rally.yaml

@@ -1086,6 +1086,26 @@
         failure_rate:
           max: 0
 
+  NovaServers.suspend_and_resume_server:
+    -
+      args:
+        flavor:
+            name: "m1.tiny"
+        image:
+            name: {{image_name}}
+        detailed: True
+      runner:
+        type: "constant"
+        times: 3
+        concurrency: 3
+      context:
+        users:
+          tenants: 3
+          users_per_tenant: 1
+      sla:
+        failure_rate:
+          max: 0
+
   NovaServers.list_servers:
     -
       args:
@@ -1476,4 +1496,4 @@
           users_per_tenant: 1
       sla:
         failure_rate:
-          max: 0
+          max: 0

rally/benchmark/scenarios/nova/servers.py

@@ -311,6 +311,27 @@ class NovaServers(utils.NovaScenario,
             self._resize_revert(server)
         self._delete_server(server, force=force_delete)
 
+    @types.set(image=types.ImageResourceType,
+               flavor=types.FlavorResourceType,
+               to_flavor=types.FlavorResourceType)
+    @validation.image_valid_on_flavor("flavor", "image")
+    @validation.required_services(consts.Service.NOVA)
+    @validation.required_openstack(users=True)
+    @base.scenario(context={"cleanup": ["nova"]})
+    def suspend_and_resume_server(self, image, flavor,
+                                  force_delete=False, **kwargs):
+        """Create a server, suspend, resume and then delete it
+
+        :param image: image to be used to boot an instance
+        :param flavor: flavor to be used to boot an instance
+        :param force_delete: True if force_delete should be used
+        :param kwargs: Optional additional arguments for server creation
+        """
+        server = self._boot_server(image, flavor, **kwargs)
+        self._suspend_server(server)
+        self._resume_server(server)
+        self._delete_server(server, force=force_delete)
+
     @types.set(image=types.ImageResourceType,
                flavor=types.FlavorResourceType)
     @validation.image_valid_on_flavor("flavor", "image")

rally/benchmark/scenarios/nova/utils.py

@@ -35,6 +35,7 @@ option_names_and_defaults = [
     ("rescue", 2, 300, 2),
     ("unrescue", 2, 300, 2),
     ("suspend", 2, 300, 2),
+    ("resume", 2, 300, 2),
     ("image_create", 0, 300, 2),
     ("image_delete", 0, 300, 2),
     ("resize", 2, 400, 5),
@@ -247,6 +248,24 @@ class NovaScenario(base.Scenario):
             check_interval=CONF.benchmark.nova_server_suspend_poll_interval
         )
 
+    @base.atomic_action_timer("nova.resume_server")
+    def _resume_server(self, server):
+        """Resumes the suspended server.
+
+        Returns when the server is actually resumed and is in the "ACTIVE"
+        state.
+
+        :param server: Server object
+        """
+        server.resume()
+        time.sleep(CONF.benchmark.nova_server_resume_prepoll_delay)
+        bench_utils.wait_for(
+            server, is_ready=bench_utils.resource_is("ACTIVE"),
+            update_resource=bench_utils.get_from_manager(),
+            timeout=CONF.benchmark.nova_server_resume_timeout,
+            check_interval=CONF.benchmark.nova_server_resume_poll_interval
+        )
+
     def _delete_server(self, server, force=False):
         """Delete the given server.
 

samples/tasks/scenarios/nova/suspend-and-resume.json

@@ -0,0 +1,26 @@
+{
+    "NovaServers.suspend_and_resume_server": [
+        {
+            "args": {
+                "flavor": {
+                    "name": "m1.nano"
+                },
+                "image": {
+                    "name": "^cirros.*uec$"
+                },
+                "force_delete": false
+            },
+            "runner": {
+                "type": "constant",
+                "times": 10,
+                "concurrency": 2
+            },
+            "context": {
+                "users": {
+                    "tenants": 3,
+                    "users_per_tenant": 2
+                }
+            }
+        }
+    ]
+}

samples/tasks/scenarios/nova/suspend-and-resume.yaml

@@ -0,0 +1,17 @@
+---
+  NovaServers.suspend_and_resume_server:
+    -
+      args:
+        flavor:
+            name: "m1.nano"
+        image:
+            name: "^cirros.*uec$"
+        force_delete: false
+      runner:
+        type: "constant"
+        times: 10
+        concurrency: 2
+      context:
+        users:
+          tenants: 3
+          users_per_tenant: 2

tests/unit/benchmark/scenarios/nova/test_servers.py

@@ -193,6 +193,26 @@ class NovaServersTestCase(test.TestCase):
                                                       fakearg="fakearg")
         scenario._list_servers.assert_called_once_with(True)
 
+    def test_suspend_and_resume_server(self):
+        fake_server = object()
+
+        scenario = servers.NovaServers()
+        scenario._generate_random_name = mock.MagicMock(return_value="name")
+        scenario._boot_server = mock.MagicMock(return_value=fake_server)
+        scenario._suspend_server = mock.MagicMock()
+        scenario._resume_server = mock.MagicMock()
+        scenario._delete_server = mock.MagicMock()
+
+        scenario.suspend_and_resume_server("img", 0, fakearg="fakearg")
+
+        scenario._boot_server.assert_called_once_with("img", 0,
+                                                      fakearg="fakearg")
+
+        scenario._suspend_server.assert_called_once_with(fake_server)
+        scenario._resume_server.assert_called_once_with(fake_server)
+        scenario._delete_server.assert_called_once_with(fake_server,
+                                                        force=False)
+
     def test_list_servers(self):
         scenario = servers.NovaServers()
         scenario._list_servers = mock.MagicMock()

tests/unit/benchmark/scenarios/nova/test_utils.py

@@ -235,6 +235,18 @@ class NovaScenarioTestCase(test.TestCase):
         self._test_atomic_action_timer(nova_scenario.atomic_actions(),
                                        "nova.suspend_server")
 
+    def test__resume_server(self):
+        nova_scenario = utils.NovaScenario()
+        nova_scenario._resume_server(self.server)
+        self.server.resume.assert_called_once_with()
+        self._test_assert_called_once_with(
+            self.wait_for.mock, self.server,
+            CONF.benchmark.nova_server_resume_poll_interval,
+            CONF.benchmark.nova_server_resume_timeout)
+        self.res_is.mock.assert_has_calls([mock.call("ACTIVE")])
+        self._test_atomic_action_timer(nova_scenario.atomic_actions(),
+                                       "nova.resume_server")
+
     @mock.patch(NOVA_UTILS + ".NovaScenario.clients")
     def test__create_image(self, mock_clients):
         mock_clients("nova").images.get.return_value = self.image