Adds support for 'Inject NMI' to 'ilo' management interface

This patch adds support for injecting NMI to 'ilo' management
interface.

Change-Id: I7de203e4f5eae1a4fdaf12cf7aba989532d82505
Story: #2001801
Task: #12523

ironic/drivers/modules/ilo/management.py

@@ -585,3 +585,29 @@ class IloManagement(base.ManagementInterface):
                          % {'node': task.node.uuid})
             raise exception.IloOperationError(operation=operation,
                                               error=ilo_exception)
+
+    @METRICS.timer('IloManagement.inject_nmi')
+    @task_manager.require_exclusive_lock
+    def inject_nmi(self, task):
+        """Inject NMI, Non Maskable Interrupt.
+
+        Inject NMI (Non Maskable Interrupt) for a node immediately.
+
+        :param task: A TaskManager instance containing the node to act on.
+        :raises: IloCommandNotSupportedError if system does not support
+            NMI injection.
+        :raises: IloError on an error from iLO.
+        :returns: None
+        """
+        node = task.node
+        ilo_object = ilo_common.get_ilo_object(node)
+        try:
+            operation = (_("Injecting NMI for node %(node)s")
+                         % {'node': node.uuid})
+            ilo_object.inject_nmi()
+        except ilo_error.IloCommandNotSupportedError as ilo_exception:
+            raise exception.IloOperationNotSupported(operation=operation,
+                                                     error=ilo_exception)
+        except ilo_error.IloError as ilo_exception:
+            raise exception.IloOperationError(operation=operation,
+                                              error=ilo_exception)

ironic/tests/unit/drivers/modules/ilo/test_management.py

@@ -849,3 +849,37 @@ class IloManagementTestCase(test_common.BaseIloTest):
             self.assertRaises(exception.IloOperationNotSupported,
                               task.driver.management.clear_iscsi_boot_target,
                               task)
+
+    @mock.patch.object(ilo_common, 'get_ilo_object', spec_set=True,
+                       autospec=True)
+    def test_inject_nmi(self, get_ilo_object_mock):
+        with task_manager.acquire(self.context, self.node.uuid,
+                                  shared=False) as task:
+            ilo_object_mock = get_ilo_object_mock.return_value
+
+            task.driver.management.inject_nmi(task)
+            ilo_object_mock.inject_nmi.assert_called_once()
+
+    @mock.patch.object(ilo_common, 'get_ilo_object', spec_set=True,
+                       autospec=True)
+    def test_inject_nmi_failed(self, get_ilo_object_mock):
+        with task_manager.acquire(self.context, self.node.uuid,
+                                  shared=False) as task:
+            ilo_object_mock = get_ilo_object_mock.return_value
+            ilo_object_mock.inject_nmi.side_effect = (
+                ilo_error.IloError('error'))
+            self.assertRaises(exception.IloOperationError,
+                              task.driver.management.inject_nmi,
+                              task)
+
+    @mock.patch.object(ilo_common, 'get_ilo_object', spec_set=True,
+                       autospec=True)
+    def test_inject_nmi_not_supported(self, get_ilo_object_mock):
+        with task_manager.acquire(self.context, self.node.uuid,
+                                  shared=False) as task:
+            ilo_object_mock = get_ilo_object_mock.return_value
+            ilo_object_mock.inject_nmi.side_effect = (
+                ilo_error.IloCommandNotSupportedError('error'))
+            self.assertRaises(exception.IloOperationNotSupported,
+                              task.driver.management.inject_nmi,
+                              task)

releasenotes/notes/ilo-inject-nmi-f487db8c3bfd08ea.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Adds support for the injection of Non-Masking Interrupts (NMI) to
+    ``ilo`` management interface. This is supported on HPE ProLiant
+    Gen9 and Gen10 servers.