Lease creation/updation should fail for invalid affinity

If user passes invalid affinity values (abc, 2), the lease is getting
created/updated successfully.

This patch will return 400 error if user passes invalid affinity values
to lease create and update APIs.

APIImpact:
1)Return 400 instead of 201 when lease is created with invalid affinity
for resource_type 'virtual:instance'.
2)Return 400 instead of 200 when lease is updated with invalid affinity
for resource_type 'virtual:instance'.

Change-Id: I3170a0957de43fd2b7bcd32eca375da2d1f17360
Closes-Bug: #1821576

api-ref/source/v1/parameters.yaml

@@ -377,16 +377,16 @@ reservation:
   type: object
 reservation_affinity:
   description: |
-    The affinity of instances to reserve.
+    The affinity of instances to reserve. The value should be ``True``, ``False`` or ``None``.
   in: body
   required: true
-  type: boolean
+  type: trilean
 reservation_affinity_optional:
   description: |
-    The affinity of instances to reserve.
+    The affinity of instances to reserve. The value should be ``True``, ``False`` or ``None``.
   in: body
   required: false
-  type: boolean
+  type: trilean
 reservation_aggregate_id:
   description: |
     The aggregate ID of the reservation.

blazar/plugins/instances/instance_plugin.py

@@ -43,6 +43,8 @@ RESERVATION_PREFIX = 'reservation'
 FLAVOR_EXTRA_SPEC = "aggregate_instance_extra_specs:" + RESERVATION_PREFIX
 INSTANCE_DELETION_TIMEOUT = 10 * 60 * 1000  # 10 minutes
 
+NONE_VALUES = ('None', 'none', None)
+
 
 class VirtualInstancePlugin(base.BasePlugin, nova.NovaClientWrapper):
     """Plugin for virtual instance resources."""
@@ -399,6 +401,12 @@ class VirtualInstancePlugin(base.BasePlugin, nova.NovaClientWrapper):
             except ValueError as e:
                 raise mgr_exceptions.MalformedParameter(six.text_type(e))
 
+        if 'affinity' in values:
+            if (values['affinity'] not in NONE_VALUES and
+                    not strutils.is_valid_boolstr(values['affinity'])):
+                raise mgr_exceptions.MalformedParameter(
+                    param='affinity (must be a bool value or None)')
+
     def reserve_resource(self, reservation_id, values):
         self._check_missing_reservation_params(values)
         self._validate_reservation_params(values)

blazar/tests/plugins/instances/test_instance_plugin.py

@@ -142,6 +142,17 @@ class TestVirtualInstancePlugin(tests.TestCase):
                                                   'server_group_id': 2,
                                                   'aggregate_id': 3})
 
+    @ddt.data("abc", 2, "2")
+    def test_affinity_error(self, value):
+        plugin = instance_plugin.VirtualInstancePlugin()
+        inputs = self.get_input_values(2, 4018, 10, 1, value,
+                                       '2030-01-01 08:00', '2030-01-01 08:00',
+                                       'lease-1', '')
+        self.assertRaises(mgr_exceptions.MalformedParameter,
+                          plugin.reserve_resource, 'reservation_id', inputs)
+        self.assertRaises(mgr_exceptions.MalformedParameter,
+                          plugin.update_reservation, 'reservation_id', inputs)
+
     @ddt.data(-1, 0, '0', 'one')
     def test_error_with_amount(self, value):
         plugin = instance_plugin.VirtualInstancePlugin()
@@ -400,7 +411,8 @@ class TestVirtualInstancePlugin(tests.TestCase):
         expected_query = ['vcpus >= 2', 'memory_mb >= 2048', 'local_gb >= 100']
         mock_host_get_query.assert_called_once_with(expected_query)
 
-    def test_pickup_host_with_no_affinity(self):
+    @ddt.data('None', 'none', None)
+    def test_pickup_host_with_no_affinity(self, value):
         def fake_get_reservation_by_host(host_id, start, end):
             return []
 
@@ -435,7 +447,7 @@ class TestVirtualInstancePlugin(tests.TestCase):
             'memory_mb': 4096,
             'disk_gb': 200,
             'amount': 2,
-            'affinity': None,
+            'affinity': value,
             'resource_properties': '',
             'start_date': datetime.datetime(2030, 1, 1, 8, 00),
             'end_date': datetime.datetime(2030, 1, 1, 12, 00)