diff --git a/magnum/drivers/mesos_ubuntu_v1/template_def.py b/magnum/drivers/mesos_ubuntu_v1/template_def.py
index 533e3fe839..5858af122e 100644
--- a/magnum/drivers/mesos_ubuntu_v1/template_def.py
+++ b/magnum/drivers/mesos_ubuntu_v1/template_def.py
@@ -13,8 +13,11 @@
 # under the License.
 import os
 
+import magnum.conf
 from magnum.drivers.heat import template_def
 
+CONF = magnum.conf.CONF
+
 
 class UbuntuMesosTemplateDefinition(template_def.BaseTemplateDefinition):
     """Mesos template for Ubuntu VM."""
@@ -61,6 +64,8 @@ class UbuntuMesosTemplateDefinition(template_def.BaseTemplateDefinition):
         extra_params['tenant_name'] = context.project_id
         extra_params['domain_name'] = context.domain_name
         extra_params['region_name'] = osc.cinder_region_name()
+        extra_params['nodes_affinity_policy'] = \
+            CONF.cluster.nodes_affinity_policy
 
         label_list = ['rexray_preempt', 'mesos_slave_isolation',
                       'mesos_slave_image_providers',
diff --git a/magnum/tests/unit/conductor/handlers/test_mesos_cluster_conductor.py b/magnum/tests/unit/conductor/handlers/test_mesos_cluster_conductor.py
index 750938f22a..5bce564061 100644
--- a/magnum/tests/unit/conductor/handlers/test_mesos_cluster_conductor.py
+++ b/magnum/tests/unit/conductor/handlers/test_mesos_cluster_conductor.py
@@ -141,6 +141,7 @@ class TestClusterConductorWithMesos(base.TestCase):
             'mesos_slave_image_providers': 'docker',
             'verify_ca': True,
             'openstack_ca': '',
+            'nodes_affinity_policy': 'soft-anti-affinity'
         }
         self.assertEqual(expected, definition)
         self.assertEqual(
@@ -198,6 +199,7 @@ class TestClusterConductorWithMesos(base.TestCase):
             'verify_ca': True,
             'slave_flavor': 'flavor_id',
             'openstack_ca': '',
+            'nodes_affinity_policy': 'soft-anti-affinity'
         }
         self.assertEqual(expected, definition)
         self.assertEqual(
@@ -261,6 +263,7 @@ class TestClusterConductorWithMesos(base.TestCase):
             'mesos_slave_image_providers': 'docker',
             'verify_ca': True,
             'openstack_ca': '',
+            'nodes_affinity_policy': 'soft-anti-affinity'
         }
         self.assertEqual(expected, definition)
         self.assertEqual(
@@ -328,6 +331,7 @@ class TestClusterConductorWithMesos(base.TestCase):
             'mesos_slave_image_providers': 'docker',
             'verify_ca': True,
             'openstack_ca': '',
+            'nodes_affinity_policy': 'soft-anti-affinity'
         }
         self.assertEqual(expected, definition)
         self.assertEqual(
@@ -393,6 +397,7 @@ class TestClusterConductorWithMesos(base.TestCase):
             'mesos_slave_image_providers': 'docker',
             'verify_ca': True,
             'openstack_ca': '',
+            'nodes_affinity_policy': 'soft-anti-affinity'
         }
         self.assertEqual(expected, definition)
         self.assertEqual(
diff --git a/magnum/tests/unit/drivers/test_template_definition.py b/magnum/tests/unit/drivers/test_template_definition.py
index bdde0a517f..b06649175f 100644
--- a/magnum/tests/unit/drivers/test_template_definition.py
+++ b/magnum/tests/unit/drivers/test_template_definition.py
@@ -1747,10 +1747,15 @@ class UbuntuMesosTemplateDefinitionTestCase(base.TestCase):
 
         mesos_def = mesos_tdef.UbuntuMesosTemplateDefinition()
 
+        CONF.set_override('nodes_affinity_policy',
+                          'anti-affinity',
+                          group='cluster')
+
         mesos_def.get_params(mock_context, mock_cluster_template, mock_cluster)
 
         expected_kwargs = {'extra_params': {
             'region_name': mock_osc.cinder_region_name.return_value,
+            'nodes_affinity_policy': 'anti-affinity',
             'auth_url': 'http://192.168.10.10:5000/v3',
             'username': 'mesos_user',
             'tenant_name': 'admin',
diff --git a/releasenotes/notes/affinity-policy-for-mesos-template-def-82627eb231aa4d28.yaml b/releasenotes/notes/affinity-policy-for-mesos-template-def-82627eb231aa4d28.yaml
new file mode 100644
index 0000000000..191c1f3f55
--- /dev/null
+++ b/releasenotes/notes/affinity-policy-for-mesos-template-def-82627eb231aa4d28.yaml
@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Fixes the problem with Mesos cluster creation where the
+    nodes_affinity_policy was not properly conveyed as it is required
+    in order to create the corresponding server group in Nova.
+    https://storyboard.openstack.org/#!/story/2005116