diff --git a/nova/objects/fields.py b/nova/objects/fields.py
index 5978b7d2e0ca..cc49ed175603 100644
--- a/nova/objects/fields.py
+++ b/nova/objects/fields.py
@@ -287,6 +287,37 @@ class WatchdogAction(Enum):
             valid_values=WatchdogAction.ALL)
 
 
+class MonitorMetricType(Enum):
+
+    CPU_FREQUENCY = "cpu.frequency"
+    CPU_USER_TIME = "cpu.user.time"
+    CPU_KERNEL_TIME = "cpu.kernel.time"
+    CPU_IDLE_TIME = "cpu.idle.time"
+    CPU_IOWAIT_TIME = "cpu.iowait.time"
+    CPU_USER_PERCENT = "cpu.user.percent"
+    CPU_KERNEL_PERCENT = "cpu.kernel.percent"
+    CPU_IDLE_PERCENT = "cpu.idle.percent"
+    CPU_IOWAIT_PERCENT = "cpu.iowait.percent"
+    CPU_PERCENT = "cpu.percent"
+
+    ALL = (
+        CPU_FREQUENCY,
+        CPU_USER_TIME,
+        CPU_KERNEL_TIME,
+        CPU_IDLE_TIME,
+        CPU_IOWAIT_TIME,
+        CPU_USER_PERCENT,
+        CPU_KERNEL_PERCENT,
+        CPU_IDLE_PERCENT,
+        CPU_IOWAIT_PERCENT,
+        CPU_PERCENT,
+    )
+
+    def __init__(self):
+        super(MonitorMetricType, self).__init__(
+            valid_values=MonitorMetricType.ALL)
+
+
 # NOTE(danms): Remove this on next release of oslo.versionedobjects
 class FlexibleBoolean(fields.Boolean):
     @staticmethod
@@ -538,6 +569,10 @@ class WatchdogActionField(BaseEnumField):
     AUTO_TYPE = WatchdogAction()
 
 
+class MonitorMetricTypeField(BaseEnumField):
+    AUTO_TYPE = MonitorMetricType()
+
+
 # FIXME(danms): Remove this after oslo.versionedobjects gets it
 # This is a flexible interpretation of boolean
 # values using common user friendly semantics for
diff --git a/nova/tests/unit/objects/test_fields.py b/nova/tests/unit/objects/test_fields.py
index 28d9fd9cdbf2..079fcd7eb196 100644
--- a/nova/tests/unit/objects/test_fields.py
+++ b/nova/tests/unit/objects/test_fields.py
@@ -445,6 +445,34 @@ class TestWatchdogAction(TestField):
         self.assertRaises(ValueError, self.field.stringify, 'acme')
 
 
+class TestMonitorMetricType(TestField):
+    def setUp(self):
+        super(TestMonitorMetricType, self).setUp()
+        self.field = fields.MonitorMetricTypeField()
+        self.coerce_good_values = [('cpu.frequency', 'cpu.frequency'),
+                                   ('cpu.user.time', 'cpu.user.time'),
+                                   ('cpu.kernel.time', 'cpu.kernel.time'),
+                                   ('cpu.idle.time', 'cpu.idle.time'),
+                                   ('cpu.iowait.time', 'cpu.iowait.time'),
+                                   ('cpu.user.percent', 'cpu.user.percent'),
+                                   ('cpu.kernel.percent',
+                                       'cpu.kernel.percent'),
+                                   ('cpu.idle.percent', 'cpu.idle.percent'),
+                                   ('cpu.iowait.percent',
+                                       'cpu.iowait.percent'),
+                                   ('cpu.percent', 'cpu.percent')]
+        self.coerce_bad_values = ['cpu.typo']
+        self.to_primitive_values = self.coerce_good_values[0:1]
+        self.from_primitive_values = self.coerce_good_values[0:1]
+
+    def test_stringify(self):
+        self.assertEqual("'cpu.frequency'",
+                         self.field.stringify('cpu.frequency'))
+
+    def test_stringify_invalid(self):
+        self.assertRaises(ValueError, self.field.stringify, 'cpufrequency')
+
+
 class TestInteger(TestField):
     def setUp(self):
         super(TestInteger, self).setUp()