Check for network already created k8

When creating a network the host should be checked to see if the network
is already created. If the required network is already there it should be used.

JIRA: YARDSTICK-1315

Change-Id: I09b114a728364ee56397af70cc48f1b7904f06cc
Signed-off-by: John O Loughlin <john.oloughlin@intel.com>

4 files changed, 97 insertions, 8 deletions

diff --git a/yardstick/common/kubernetes_utils.py b/yardstick/common/kubernetes_utils.py
index 42267fc41..d1dd42173 100644
--- a/yardstick/common/kubernetes_utils.py
+++ b/yardstick/common/kubernetes_utils.py
@@ -241,10 +241,30 @@ def get_custom_resource_definition(kind):
             action='delete', resource='CustomResourceDefinition')
 
 
-def create_network(scope, group, version, plural, body, namespace='default'):
+def get_network(scope, group, version, plural, name, namespace='default'):
     api = get_custom_objects_api()
     try:
         if scope == consts.SCOPE_CLUSTER:
+            network = api.get_cluster_custom_object(group, version, plural, name)
+        else:
+            network = api.get_namespaced_custom_object(
+                group, version, namespace, plural, name)
+    except ApiException as e:
+        if e.status in [404]:
+            return
+        else:
+            raise exceptions.KubernetesApiException(
+                action='get', resource='Custom Object: Network')
+    return network
+
+
+def create_network(scope, group, version, plural, body, name, namespace='default'):
+    api = get_custom_objects_api()
+    if get_network(scope, group, version, plural, name, namespace):
+        logging.info('Network %s already exists', name)
+        return
+    try:
+        if scope == consts.SCOPE_CLUSTER:
             api.create_cluster_custom_object(group, version, plural, body)
         else:
             api.create_namespaced_custom_object(
diff --git a/yardstick/orchestrator/kubernetes.py b/yardstick/orchestrator/kubernetes.py
index bb01b33fa..afff5cf58 100644
--- a/yardstick/orchestrator/kubernetes.py
+++ b/yardstick/orchestrator/kubernetes.py
@@ -399,7 +399,7 @@ class NetworkObject(object):
 
     def create(self):
         k8s_utils.create_network(self.scope, self.group, self.version,
-                                 self.plural, self.template)
+                                 self.plural, self.template, self._name)
 
     def delete(self):
         k8s_utils.delete_network(self.scope, self.group, self.version,
diff --git a/yardstick/tests/unit/common/test_kubernetes_utils.py b/yardstick/tests/unit/common/test_kubernetes_utils.py
index bf9992b57..5da32a7cc 100644
--- a/yardstick/tests/unit/common/test_kubernetes_utils.py
+++ b/yardstick/tests/unit/common/test_kubernetes_utils.py
@@ -159,7 +159,7 @@ class GetCustomResourceDefinitionTestCase(base.BaseUnitTestCase):
             kubernetes_utils.get_custom_resource_definition('kind')
 
 
-class CreateNetworkTestCase(base.BaseUnitTestCase):
+class GetNetworkTestCase(base.BaseUnitTestCase):
     @mock.patch.object(kubernetes_utils, 'get_custom_objects_api')
     def test_execute_correct(self, mock_get_api):
         mock_api = mock.Mock()
@@ -167,29 +167,97 @@ class CreateNetworkTestCase(base.BaseUnitTestCase):
         group = 'group.com'
         version = mock.Mock()
         plural = 'networks'
+        name = 'net_one'
+
+        kubernetes_utils.get_network(
+            constants.SCOPE_CLUSTER, group, version, plural, name)
+        mock_api.get_cluster_custom_object.assert_called_once_with(
+            group, version, plural, name)
+
+        mock_api.reset_mock()
+        kubernetes_utils.get_network(
+            constants.SCOPE_NAMESPACED, group, version, plural, name)
+        mock_api.get_namespaced_custom_object.assert_called_once_with(
+            group, version, 'default', plural, name)
+
+    @mock.patch.object(kubernetes_utils, 'get_custom_objects_api')
+    def test_execute_exception(self, mock_get_api):
+        mock_api = mock.Mock()
+        mock_api.get_cluster_custom_object.side_effect = rest.ApiException(404)
+        mock_api.get_namespaced_custom_object.side_effect = rest.ApiException(404)
+        mock_get_api.return_value = mock_api
+        group = 'group.com'
+        version = mock.Mock()
+        plural = 'networks'
+        name = 'net_one'
+
+        network_obj = kubernetes_utils.get_network(
+            constants.SCOPE_CLUSTER, group, version, plural, name)
+        self.assertIsNone(network_obj)
+
+        mock_api.reset_mock()
+        network_obj = kubernetes_utils.get_network(
+           constants.SCOPE_NAMESPACED, group, version, plural, name)
+        self.assertIsNone(network_obj)
+
+
+class CreateNetworkTestCase(base.BaseUnitTestCase):
+    @mock.patch.object(kubernetes_utils, 'get_custom_objects_api')
+    @mock.patch.object(kubernetes_utils, 'get_network')
+    def test_execute_correct(self, mock_get_net, mock_get_api):
+        mock_get_net.return_value = None
+        mock_api = mock.Mock()
+        mock_get_api.return_value = mock_api
+        group = 'group.com'
+        version = mock.Mock()
+        plural = 'networks'
         body = mock.Mock()
+        name = 'net_one'
 
         kubernetes_utils.create_network(
-            constants.SCOPE_CLUSTER, group, version, plural, body)
+            constants.SCOPE_CLUSTER, group, version, plural, body, name)
         mock_api.create_cluster_custom_object.assert_called_once_with(
             group, version, plural, body)
 
         mock_api.reset_mock()
         kubernetes_utils.create_network(
-            constants.SCOPE_NAMESPACED, group, version, plural, body)
+            constants.SCOPE_NAMESPACED, group, version, plural, body, name)
         mock_api.create_namespaced_custom_object.assert_called_once_with(
             group, version, 'default', plural, body)
 
+    @mock.patch.object(kubernetes_utils, 'get_custom_objects_api')
+    @mock.patch.object(kubernetes_utils, 'get_network')
+    def test_network_already_created(self, mock_get_net, mock_get_api):
+        mock_get_net.return_value = mock.Mock
+        mock_api = mock.Mock()
+        mock_get_api.return_value = mock_api
+        group = 'group.com'
+        version = mock.Mock()
+        plural = 'networks'
+        body = mock.Mock()
+        name = 'net_one'
+
+        mock_api.reset_mock()
+        kubernetes_utils.create_network(
+            constants.SCOPE_CLUSTER, group, version, plural, body, name)
+        mock_api.create_cluster_custom_object.assert_not_called()
+
+        mock_api.reset_mock()
+        kubernetes_utils.create_network(
+            constants.SCOPE_NAMESPACED, group, version, plural, body, name)
+        mock_api.create_namespaced_custom_object.assert_not_called()
 
     @mock.patch.object(kubernetes_utils, 'get_custom_objects_api')
-    def test_execute_exception(self, mock_get_api):
+    @mock.patch.object(kubernetes_utils, 'get_network')
+    def test_execute_exception(self, mock_get_net, mock_get_api):
+        mock_get_net.return_value = None
         mock_api = mock.Mock()
         mock_api.create_cluster_custom_object.side_effect = rest.ApiException
         mock_get_api.return_value = mock_api
         with self.assertRaises(exceptions.KubernetesApiException):
             kubernetes_utils.create_network(
                 constants.SCOPE_CLUSTER, mock.ANY, mock.ANY, mock.ANY,
-                mock.ANY)
+                mock.ANY, mock.ANY)
 
 
 class DeleteNetworkTestCase(base.BaseUnitTestCase):
diff --git a/yardstick/tests/unit/orchestrator/test_kubernetes.py b/yardstick/tests/unit/orchestrator/test_kubernetes.py
index f248338ee..5a48fe573 100644
--- a/yardstick/tests/unit/orchestrator/test_kubernetes.py
+++ b/yardstick/tests/unit/orchestrator/test_kubernetes.py
@@ -491,9 +491,10 @@ class NetworkObjectTestCase(base.BaseUnitTestCase):
         net_obj._version = 'version'
         net_obj._plural = 'plural'
         net_obj._template = 'template'
+        net_obj._name = 'fake_name'
         net_obj.create()
         mock_create_network.assert_called_once_with(
-            'scope', 'group', 'version', 'plural', 'template')
+            'scope', 'group', 'version', 'plural', 'template', 'fake_name')
 
     @mock.patch.object(kubernetes_utils, 'delete_network')
     def test_delete(self, mock_delete_network):