agent_base_vendor.py.patch

--- agent_base_vendor.py.org	2016-09-27 01:28:32.492743226 +0300
+++ agent_base_vendor.py	2016-09-26 16:40:22.062010957 +0300
@@ -803,6 +803,16 @@
                 self._log_and_raise_deployment_error(task, msg)
 
         try:
+            manager_utils.node_power_action(task, states.POWER_OFF)
+        except Exception as e:
+            msg = (_("DBG: Failed to power off node %(node)s "
+                     "before set boot device %(boot_dev)s. "
+                     "Error: %(error)s") %
+                   {'boot_dev': boot_devices.DISK, 'node': node.uuid,
+                    'error': e})
+            self._log_and_raise_deployment_error(task, msg)
+
+        try:
             deploy_utils.try_set_boot_device(task, boot_devices.DISK)
         except Exception as e:
             msg = (_("Failed to change the boot device to %(boot_dev)s "