Ensures that OneView nodes are free for use by Ironic

Following the requirement. The validation is used within
"OneViewPower.validate". As a result it enforces that a machine
is owned by OneView, thus it cannot be powered on or off by the
Ironic driver. Raising an exception when the node is owned by
Oneview.

Conflicts:
	ironic/drivers/modules/oneview/power.py
	ironic/tests/unit/drivers/modules/oneview/test_deploy_utils.py

Change-Id: Ibf500577b7a3b5976fd49fd217c1be3d3e9c0f46
Closes-Bug: 1627034
Co-Authored-By: Stenio Araujo <steniaraujo@lsd.ufcg.edu.br>
(cherry picked from commit 2505cb58f74b05c534a6a513080919063cc65fa9)

3 files changed, 50 insertions, 7 deletions

diff --git a/ironic/drivers/modules/oneview/power.py b/ironic/drivers/modules/oneview/power.py
index dc4ebcfd8..d72b41e2c 100644
--- a/ironic/drivers/modules/oneview/power.py
+++ b/ironic/drivers/modules/oneview/power.py
@@ -23,7 +23,7 @@ from ironic.common import states
 from ironic.conductor import task_manager
 from ironic.drivers import base
 from ironic.drivers.modules.oneview import common
-
+from ironic.drivers.modules.oneview import deploy_utils
 
 LOG = logging.getLogger(__name__)
 
@@ -44,17 +44,26 @@ class OneViewPower(base.PowerInterface):
         enclosure_group_uri. Also, checks if the server profile of the node is
         applied, if NICs are valid for the server profile of the node, and if
         the server hardware attributes (ram, memory, vcpus count) are
-        consistent with OneView.
+        consistent with OneView. It validates if the node is being used by
+        Oneview.
 
         :param task: a task from TaskManager.
         :raises: MissingParameterValue if a required parameter is missing.
         :raises: InvalidParameterValue if parameters set are inconsistent with
                  resources in OneView
+        :raises: InvalidParameterValue if the node in use by OneView.
+        :raises: OneViewError if not possible to get OneView's information
+                 for the given node, if not possible to retrieve Server
+                 Hardware from OneView.
         """
         common.verify_node_info(task.node)
 
         try:
             common.validate_oneview_resources_compatibility(task)
+
+            if deploy_utils.is_node_in_use_by_oneview(task.node):
+                raise exception.InvalidParameterValue(
+                    _("Node %s is in use by OneView.") % task.node.uuid)
         except exception.OneViewError as oneview_exc:
             raise exception.InvalidParameterValue(oneview_exc)
 
@@ -62,7 +71,6 @@ class OneViewPower(base.PowerInterface):
         """Gets the current power state.
 
         :param task: a TaskManager instance.
-        :param node: The Node.
         :returns: one of :mod:`ironic.common.states` POWER_OFF,
                   POWER_ON or ERROR.
         :raises: OneViewError if fails to retrieve power state of OneView
@@ -87,7 +95,6 @@ class OneViewPower(base.PowerInterface):
         """Turn the current power state on or off.
 
         :param task: a TaskManager instance.
-        :param node: The Node.
         :param power_state: The desired power state POWER_ON, POWER_OFF or
                             REBOOT from :mod:`ironic.common.states`.
         :raises: InvalidParameterValue if an invalid power state was specified.
@@ -124,7 +131,6 @@ class OneViewPower(base.PowerInterface):
         """Reboot the node
 
         :param task: a TaskManager instance.
-        :param node: The Node.
         :raises: PowerStateFailure if the final state of the node is not
                  POWER_ON.
         """
diff --git a/ironic/tests/unit/drivers/modules/oneview/test_power.py b/ironic/tests/unit/drivers/modules/oneview/test_power.py
index de23c9611..2547a2c3c 100644
--- a/ironic/tests/unit/drivers/modules/oneview/test_power.py
+++ b/ironic/tests/unit/drivers/modules/oneview/test_power.py
@@ -24,12 +24,12 @@ from ironic.common import exception
 from ironic.common import states
 from ironic.conductor import task_manager
 from ironic.drivers.modules.oneview import common
+from ironic.drivers.modules.oneview import deploy_utils
 from ironic.tests.unit.conductor import mgr_utils
 from ironic.tests.unit.db import base as db_base
 from ironic.tests.unit.db import utils as db_utils
 from ironic.tests.unit.objects import utils as obj_utils
 
-
 oneview_exceptions = importutils.try_import('oneview_client.exceptions')
 
 POWER_ON = 'On'
@@ -58,7 +58,11 @@ class OneViewPowerDriverTestCase(db_base.DbTestCase):
 
     @mock.patch.object(common, 'validate_oneview_resources_compatibility',
                        spect_set=True, autospec=True)
-    def test_power_interface_validate(self, mock_validate, mock_get_ov_client):
+    @mock.patch.object(deploy_utils, 'is_node_in_use_by_oneview',
+                       spect_set=True, autospec=True)
+    def test_power_interface_validate(self, mock_is_node_in_use_by_oneview,
+                                      mock_validate, mock_get_ov_client):
+        mock_is_node_in_use_by_oneview.return_value = False
         with task_manager.acquire(self.context, self.node.uuid) as task:
             task.driver.power.validate(task)
             self.assertTrue(mock_validate.called)
@@ -82,6 +86,35 @@ class OneViewPowerDriverTestCase(db_base.DbTestCase):
                               task.driver.power.validate,
                               task)
 
+    @mock.patch.object(common, 'validate_oneview_resources_compatibility',
+                       spect_set=True, autospec=True)
+    @mock.patch.object(deploy_utils, 'is_node_in_use_by_oneview',
+                       spect_set=True, autospec=True)
+    def test_power_validate_fail_node_used_by_oneview(
+            self, mock_is_node_in_use_by_oneview, mock_validate,
+            mock_get_ov_client):
+        mock_validate.return_value = True
+        mock_is_node_in_use_by_oneview.return_value = True
+        with task_manager.acquire(self.context, self.node.uuid) as task:
+            self.assertRaises(exception.InvalidParameterValue,
+                              task.driver.power.validate,
+                              task)
+
+    @mock.patch.object(common, 'validate_oneview_resources_compatibility',
+                       spect_set=True, autospec=True)
+    @mock.patch.object(deploy_utils, 'is_node_in_use_by_oneview',
+                       spect_set=True, autospec=True)
+    def test_validate_fail_node_in_use_by_oneview(
+            self, mock_is_node_in_use_by_oneview, mock_validate,
+            mock_get_ov_client):
+        mock_validate.return_value = True
+        mock_is_node_in_use_by_oneview.side_effect = (
+            exception.OneViewError('message'))
+        with task_manager.acquire(self.context, self.node.uuid) as task:
+            self.assertRaises(exception.InvalidParameterValue,
+                              task.driver.power.validate,
+                              task)
+
     def test_power_interface_get_properties(self, mock_get_ov_client):
         expected = common.COMMON_PROPERTIES
         self.assertItemsEqual(expected, self.driver.power.get_properties())
diff --git a/releasenotes/notes/oneview-node-free-for-ironic-61b05fee827664cb.yaml b/releasenotes/notes/oneview-node-free-for-ironic-61b05fee827664cb.yaml
new file mode 100644
index 000000000..4cb06e1bb
--- /dev/null
+++ b/releasenotes/notes/oneview-node-free-for-ironic-61b05fee827664cb.yaml
@@ -0,0 +1,4 @@
+---
+fixes:
+  - Fixes an issue with ironic being able to change
+    the power state of nodes currently in use by OneView.