def test_get_metrics(self):
metrics = objects.MonitorMetricList()
monitor = virt_driver.Monitor(FakeResourceTracker())
monitor.add_metrics_to_list(metrics)
names = monitor.get_metric_names()
for metric in metrics.objects:
self.assertIn(metric.name, names)
# Some conversion to a dict to ease testing...
metrics = {m.name: m.value for m in metrics.objects}
self.assertEqual(metrics["cpu.frequency"], 800)
self.assertEqual(metrics["cpu.user.time"], 26728850000000)
self.assertEqual(metrics["cpu.kernel.time"], 5664160000000)
self.assertEqual(metrics["cpu.idle.time"], 1592705190000000)
self.assertEqual(metrics["cpu.iowait.time"], 6121490000000)
self.assertTrue(metrics["cpu.user.percent"] <= 1
and metrics["cpu.user.percent"] >= 0)
self.assertTrue(metrics["cpu.kernel.percent"] <= 1
and metrics["cpu.kernel.percent"] >= 0)
self.assertTrue(metrics["cpu.idle.percent"] <= 1
and metrics["cpu.idle.percent"] >= 0)
self.assertTrue(metrics["cpu.iowait.percent"] <= 1
and metrics["cpu.iowait.percent"] >= 0)
self.assertTrue(metrics["cpu.percent"] <= 1
and metrics["cpu.percent"] >= 0)
def test_ensure_single_sampling(self):
# We want to ensure that the virt driver's get_host_cpu_stats()
# is only ever called once, otherwise values for monitor metrics
# might be illogical -- e.g. pct cpu times for user/system/idle
# may add up to more than 100.
metrics = objects.MonitorMetricList()
monitor = virt_driver.Monitor(FakeResourceTracker())
with mock.patch.object(FakeDriver, 'get_host_cpu_stats') as mocked:
monitor.populate_metrics(metrics)
mocked.assert_called_once_with()
def test_get_metric_names(self):
monitor = virt_driver.Monitor(FakeResourceTracker())
names = monitor.get_metric_names()
self.assertEqual(10, len(names))
self.assertIn("cpu.frequency", names)
self.assertIn("cpu.user.time", names)
self.assertIn("cpu.kernel.time", names)
self.assertIn("cpu.idle.time", names)
self.assertIn("cpu.iowait.time", names)
self.assertIn("cpu.user.percent", names)
self.assertIn("cpu.kernel.percent", names)
self.assertIn("cpu.idle.percent", names)
self.assertIn("cpu.iowait.percent", names)
self.assertIn("cpu.percent", names)