Generic power interface for soft reboot and soft power off

This patch updates the generic power interface to support SOFT_REBOOT
and SOFT_POWER_OFF. And also it introduces "timeout" optional
parameter for all power operations.

Partial-Bug: #1526226
Change-Id: I1c9bbd1f11f6a8565607c874b3c99aa10eeb62a5

doc/source/dev/webapi-version-history.rst

@@ -2,6 +2,12 @@
 REST API Version History
 ========================
 
+**1.27** (Ocata)
+
+    Add ``soft rebooting`` and ``soft power off`` as possible values
+    for the ``target`` field of the power state change payload, and
+    also add ``timeout`` field to it.
+
 **1.26** (Ocata)
 
     Add portgroup ``mode`` and ``properties`` fields.

etc/ironic/ironic.conf.sample

@@ -1013,6 +1013,12 @@
 # disable timeout. (integer value)
 #clean_callback_timeout = 1800
 
+# Timeout (in seconds) of soft reboot and soft power off
+# operation. This value always has to be positive. (integer
+# value)
+# Minimum value: 1
+#soft_power_off_timeout = 600
+
 
 [console]
 

ironic/api/controllers/v1/node.py

@@ -102,6 +102,12 @@ PROVISION_ACTION_STATES = (ir_states.VERBS['manage'],
 
 _NODES_CONTROLLER_RESERVED_WORDS = None
 
+ALLOWED_TARGET_POWER_STATES = (ir_states.POWER_ON,
+                               ir_states.POWER_OFF,
+                               ir_states.REBOOT,
+                               ir_states.SOFT_REBOOT,
+                               ir_states.SOFT_POWER_OFF)
+
 
 def get_nodes_controller_reserved_names():
     global _NODES_CONTROLLER_RESERVED_WORDS
@@ -434,16 +440,22 @@ class NodeStatesController(rest.RestController):
 
     @METRICS.timer('NodeStatesController.power')
     @expose.expose(None, types.uuid_or_name, wtypes.text,
+                   wtypes.IntegerType(minimum=1),
                    status_code=http_client.ACCEPTED)
-    def power(self, node_ident, target):
+    def power(self, node_ident, target, timeout=None):
         """Set the power state of the node.
 
         :param node_ident: the UUID or logical name of a node.
         :param target: The desired power state of the node.
+        :param timeout: timeout (in seconds) positive integer (> 0) for any
+          power state. ``None`` indicates to use default timeout.
         :raises: ClientSideError (HTTP 409) if a power operation is
                  already in progress.
         :raises: InvalidStateRequested (HTTP 400) if the requested target
                  state is not valid or if the node is in CLEANING state.
+        :raises: NotAcceptable (HTTP 406) for soft reboot, soft power off or
+          timeout parameter, if requested version of the API is less than 1.27.
+        :raises: Invalid (HTTP 400) if timeout value is less than 1.
 
         """
         cdict = pecan.request.context.to_policy_values()
@@ -454,9 +466,16 @@ class NodeStatesController(rest.RestController):
         rpc_node = api_utils.get_rpc_node(node_ident)
         topic = pecan.request.rpcapi.get_topic_for(rpc_node)
 
-        if target not in [ir_states.POWER_ON,
+        if ((target in [ir_states.SOFT_REBOOT, ir_states.SOFT_POWER_OFF] or
-                          ir_states.POWER_OFF,
+             timeout) and not api_utils.allow_soft_power_off()):
-                          ir_states.REBOOT]:
+            raise exception.NotAcceptable()
+        # FIXME(naohirot): This check is workaround because
+        #                  wtypes.IntegerType(minimum=1) is not effective
+        if timeout is not None and timeout < 1:
+            raise exception.Invalid(
+                _("timeout has to be positive integer"))
+
+        if target not in ALLOWED_TARGET_POWER_STATES:
             raise exception.InvalidStateRequested(
                 action=target, node=node_ident,
                 state=rpc_node.power_state)
@@ -470,7 +489,8 @@ class NodeStatesController(rest.RestController):
 
         pecan.request.rpcapi.change_node_power_state(pecan.request.context,
                                                      rpc_node.uuid, target,
-                                                     topic)
+                                                     timeout=timeout,
+                                                     topic=topic)
         # Set the HTTP Location Header
         url_args = '/'.join([node_ident, 'states'])
         pecan.response.location = link.build_url('nodes', url_args)

ironic/api/controllers/v1/utils.py

@@ -369,6 +369,15 @@ def allow_raid_config():
     return pecan.request.version.minor >= versions.MINOR_12_RAID_CONFIG
 
 
+def allow_soft_power_off():
+    """Check if Soft Power Off is allowed for the node.
+
+    Version 1.27 of the API allows Soft Power Off, including Soft Reboot, for
+    the node.
+    """
+    return pecan.request.version.minor >= versions.MINOR_27_SOFT_POWER_OFF
+
+
 def allow_links_node_states_and_driver_properties():
     """Check if links are displayable.
 

ironic/api/controllers/v1/versions.py

@@ -57,6 +57,7 @@ BASE_VERSION = 1
 #        Add port.portgroup_uuid field.
 # v1.25: Add possibility to unset chassis_uuid from node.
 # v1.26: Add portgroup.mode and portgroup.properties.
+# v1.27: Add soft reboot, soft power off and timeout.
 
 MINOR_0_JUNO = 0
 MINOR_1_INITIAL_VERSION = 1
@@ -85,11 +86,12 @@ MINOR_23_PORTGROUPS = 23
 MINOR_24_PORTGROUPS_SUBCONTROLLERS = 24
 MINOR_25_UNSET_CHASSIS_UUID = 25
 MINOR_26_PORTGROUP_MODE_PROPERTIES = 26
+MINOR_27_SOFT_POWER_OFF = 27
 
 # When adding another version, update MINOR_MAX_VERSION and also update
 # doc/source/dev/webapi-version-history.rst with a detailed explanation of
 # what the version has changed.
-MINOR_MAX_VERSION = MINOR_26_PORTGROUP_MODE_PROPERTIES
+MINOR_MAX_VERSION = MINOR_27_SOFT_POWER_OFF
 
 # String representations of the minor and maximum versions
 MIN_VERSION_STRING = '{}.{}'.format(BASE_VERSION, MINOR_1_INITIAL_VERSION)

ironic/common/states.py

@@ -212,6 +212,12 @@ POWER_OFF = 'power off'
 REBOOT = 'rebooting'
 """ Node is rebooting. """
 
+SOFT_REBOOT = 'soft rebooting'
+""" Node is rebooting gracefully. """
+
+SOFT_POWER_OFF = 'soft power off'
+""" Node is in the process of soft power off. """
+
 
 #####################
 # State machine model

ironic/conductor/manager.py

@@ -83,7 +83,7 @@ class ConductorManager(base_manager.BaseConductorManager):
     """Ironic Conductor manager main class."""
 
     # NOTE(rloo): This must be in sync with rpcapi.ConductorAPI's.
-    RPC_API_VERSION = '1.38'
+    RPC_API_VERSION = '1.39'
 
     target = messaging.Target(version=RPC_API_VERSION)
 
@@ -179,7 +179,8 @@ class ConductorManager(base_manager.BaseConductorManager):
     @messaging.expected_exceptions(exception.InvalidParameterValue,
                                    exception.NoFreeConductorWorker,
                                    exception.NodeLocked)
-    def change_node_power_state(self, context, node_id, new_state):
+    def change_node_power_state(self, context, node_id, new_state,
+                                timeout=None):
         """RPC method to encapsulate changes to a node's state.
 
         Perform actions such as power on, power off. The validation is
@@ -191,8 +192,12 @@ class ConductorManager(base_manager.BaseConductorManager):
         :param context: an admin context.
         :param node_id: the id or uuid of a node.
         :param new_state: the desired power state of the node.
+        :param timeout: timeout (in seconds) positive integer (> 0) for any
+          power state. ``None`` indicates to use default timeout.
         :raises: NoFreeConductorWorker when there is no free worker to start
                  async task.
+        :raises: InvalidParameterValue
+        :raises: MissingParameterValue
 
         """
         LOG.debug("RPC change_node_power_state called for node %(node)s. "
@@ -202,19 +207,38 @@ class ConductorManager(base_manager.BaseConductorManager):
         with task_manager.acquire(context, node_id, shared=False,
                                   purpose='changing node power state') as task:
             task.driver.power.validate(task)
+
+            if (new_state not in
+                task.driver.power.get_supported_power_states(task)):
+                # FIXME(naohirot):
+                # After driver composition, we should print power interface
+                # name here instead of driver.
+                raise exception.InvalidParameterValue(
+                    _('The driver %(driver)s does not support the power state,'
+                      ' %(state)s') %
+                    {'driver': task.node.driver, 'state': new_state})
+
+            if new_state in (states.SOFT_REBOOT, states.SOFT_POWER_OFF):
+                power_timeout = (timeout or
+                                 CONF.conductor.soft_power_off_timeout)
+            else:
+                power_timeout = timeout
+
             # Set the target_power_state and clear any last_error, since we're
             # starting a new operation. This will expose to other processes
             # and clients that work is in progress.
-            if new_state == states.REBOOT:
+            if new_state in (states.POWER_ON, states.REBOOT,
+                             states.SOFT_REBOOT):
                 task.node.target_power_state = states.POWER_ON
             else:
-                task.node.target_power_state = new_state
+                task.node.target_power_state = states.POWER_OFF
+
             task.node.last_error = None
             task.node.save()
             task.set_spawn_error_hook(utils.power_state_error_handler,
                                       task.node, task.node.power_state)
             task.spawn_after(self._spawn_worker, utils.node_power_action,
-                             task, new_state)
+                             task, new_state, timeout=power_timeout)
 
     @METRICS.timer('ConductorManager.vendor_passthru')
     @messaging.expected_exceptions(exception.NoFreeConductorWorker,

ironic/conductor/rpcapi.py

@@ -85,11 +85,12 @@ class ConductorAPI(object):
     |    1.36 - Added create_node
     |    1.37 - Added destroy_volume_target and update_volume_target
     |    1.38 - Added vif_attach, vif_detach, vif_list
+    |    1.39 - Added timeout optional parameter to change_node_power_state
 
     """
 
     # NOTE(rloo): This must be in sync with manager.ConductorManager's.
-    RPC_API_VERSION = '1.38'
+    RPC_API_VERSION = '1.39'
 
     def __init__(self, topic=None):
         super(ConductorAPI, self).__init__()
@@ -179,7 +180,8 @@ class ConductorAPI(object):
         cctxt = self.client.prepare(topic=topic or self.topic, version='1.1')
         return cctxt.call(context, 'update_node', node_obj=node_obj)
 
-    def change_node_power_state(self, context, node_id, new_state, topic=None):
+    def change_node_power_state(self, context, node_id, new_state,
+                                topic=None, timeout=None):
         """Change a node's power state.
 
         Synchronously, acquire lock and start the conductor background task
@@ -188,14 +190,16 @@ class ConductorAPI(object):
         :param context: request context.
         :param node_id: node id or uuid.
         :param new_state: one of ironic.common.states power state values
+        :param timeout: timeout (in seconds) positive integer (> 0) for any
+           power state. ``None`` indicates to use default timeout.
         :param topic: RPC topic. Defaults to self.topic.
         :raises: NoFreeConductorWorker when there is no free worker to start
                  async task.
 
         """
-        cctxt = self.client.prepare(topic=topic or self.topic, version='1.6')
+        cctxt = self.client.prepare(topic=topic or self.topic, version='1.39')
         return cctxt.call(context, 'change_node_power_state', node_id=node_id,
-                          new_state=new_state)
+                          new_state=new_state, timeout=timeout)
 
     def vendor_passthru(self, context, node_id, driver_method, http_method,
                         info, topic=None):

ironic/conductor/utils.py

@@ -15,6 +15,7 @@
 from oslo_config import cfg
 from oslo_log import log
 from oslo_utils import excutils
+from oslo_utils import reflection
 
 from ironic.common import exception
 from ironic.common.i18n import _, _LE, _LI, _LW
@@ -67,15 +68,15 @@ def node_set_boot_device(task, device, persistent=False):
 
 
 @task_manager.require_exclusive_lock
-def node_power_action(task, new_state):
+def node_power_action(task, new_state, timeout=None):
     """Change power state or reset for a node.
 
     Perform the requested power action if the transition is required.
 
     :param task: a TaskManager instance containing the node to act on.
-    :param new_state: Any power state from ironic.common.states. If the
+    :param new_state: Any power state from ironic.common.states.
-        state is 'REBOOT' then a reboot will be attempted, otherwise
+    :param timeout: timeout (in seconds) positive integer (> 0) for any
-        the node power state is directly set to 'state'.
+      power state. ``None`` indicates to use default timeout.
     :raises: InvalidParameterValue when the wrong state is specified
              or the wrong driver info is specified.
     :raises: other exceptions by the node's power driver if something
@@ -86,9 +87,37 @@ def node_power_action(task, new_state):
         task, fields.NotificationLevel.INFO, fields.NotificationStatus.START,
         new_state)
     node = task.node
-    target_state = states.POWER_ON if new_state == states.REBOOT else new_state
 
-    if new_state != states.REBOOT:
+    if new_state in (states.POWER_ON, states.REBOOT, states.SOFT_REBOOT):
+        target_state = states.POWER_ON
+    elif new_state in (states.POWER_OFF, states.SOFT_POWER_OFF):
+        target_state = states.POWER_OFF
+    else:
+        target_state = None
+
+    def _not_going_to_change():
+        # Neither the ironic service nor the hardware has erred. The
+        # node is, for some reason, already in the requested state,
+        # though we don't know why. eg, perhaps the user previously
+        # requested the node POWER_ON, the network delayed those IPMI
+        # packets, and they are trying again -- but the node finally
+        # responds to the first request, and so the second request
+        # gets to this check and stops.
+        # This isn't an error, so we'll clear last_error field
+        # (from previous operation), log a warning, and return.
+        node['last_error'] = None
+        # NOTE(dtantsur): under rare conditions we can get out of sync here
+        node['power_state'] = curr_state
+        node['target_power_state'] = states.NOSTATE
+        node.save()
+        notify_utils.emit_power_set_notification(
+            task, fields.NotificationLevel.INFO,
+            fields.NotificationStatus.END, new_state)
+        LOG.warning(_LW("Not going to change node %(node)s power "
+                        "state because current state = requested state "
+                        "= '%(state)s'."),
+                    {'node': node.uuid, 'state': curr_state})
+
     try:
         curr_state = task.driver.power.get_power_state(task)
     except Exception as e:
@@ -102,31 +131,16 @@ def node_power_action(task, new_state):
                 task, fields.NotificationLevel.ERROR,
                 fields.NotificationStatus.ERROR, new_state)
 
-        if curr_state == new_state:
+    if curr_state == states.POWER_ON:
-            # Neither the ironic service nor the hardware has erred. The
+        if new_state == states.POWER_ON:
-            # node is, for some reason, already in the requested state,
+            _not_going_to_change()
-            # though we don't know why. eg, perhaps the user previously
-            # requested the node POWER_ON, the network delayed those IPMI
-            # packets, and they are trying again -- but the node finally
-            # responds to the first request, and so the second request
-            # gets to this check and stops.
-            # This isn't an error, so we'll clear last_error field
-            # (from previous operation), log a warning, and return.
-            node['last_error'] = None
-            # NOTE(dtantsur): under rare conditions we can get out of sync here
-            node['power_state'] = new_state
-            node['target_power_state'] = states.NOSTATE
-            node.save()
-            notify_utils.emit_power_set_notification(
-                task, fields.NotificationLevel.INFO,
-                fields.NotificationStatus.END, new_state)
-            LOG.warning(_LW("Not going to change node %(node)s power "
-                            "state because current state = requested state "
-                            "= '%(state)s'."),
-                        {'node': node.uuid, 'state': curr_state})
             return
-
+    elif curr_state == states.POWER_OFF:
-        if curr_state == states.ERROR:
+        if new_state in (states.POWER_OFF, states.SOFT_POWER_OFF):
+            _not_going_to_change()
+            return
+    else:
+        # if curr_state == states.ERROR:
         # be optimistic and continue action
         LOG.warning(_LW("Driver returns ERROR power state for node %s."),
                     node.uuid)
@@ -142,15 +156,37 @@ def node_power_action(task, new_state):
     # take power action
     try:
         if new_state != states.REBOOT:
+            if ('timeout' in reflection.get_signature(
+                    task.driver.power.set_power_state).parameters):
+                task.driver.power.set_power_state(task, new_state,
+                                                  timeout=timeout)
+            else:
+                # FIXME(naohirot):
+                # After driver composition, we should print power interface
+                # name here instead of driver.
+                LOG.warning(
+                    _LW("The set_power_state method of %s(driver_name)s "
+                        "doesn't support 'timeout' parameter."),
+                    {'driver_name': node.driver})
                 task.driver.power.set_power_state(task, new_state)
         else:
+            if ('timeout' in reflection.get_signature(
+                    task.driver.power.reboot).parameters):
+                task.driver.power.reboot(task, timeout=timeout)
+            else:
+                LOG.warning(_LW("The reboot method of %s(driver_name)s "
+                                "doesn't support 'timeout' parameter."),
+                            {'driver_name': node.driver})
                 task.driver.power.reboot(task)
     except Exception as e:
         with excutils.save_and_reraise_exception():
             node['target_power_state'] = states.NOSTATE
             node['last_error'] = _(
-                "Failed to change power state to '%(target)s'. "
+                "Failed to change power state to '%(target_state)s' "
-                "Error: %(error)s") % {'target': target_state, 'error': e}
+                "by '%(new_state)s'. Error: %(error)s") % {
+                    'target_state': target_state,
+                    'new_state': new_state,
+                    'error': e}
             node.save()
             notify_utils.emit_power_set_notification(
                 task, fields.NotificationLevel.ERROR,
@@ -164,8 +200,10 @@ def node_power_action(task, new_state):
             task, fields.NotificationLevel.INFO, fields.NotificationStatus.END,
             new_state)
         LOG.info(_LI('Successfully set node %(node)s power state to '
-                     '%(state)s.'),
+                     '%(target_state)s by %(new_state)s.'),
-                 {'node': node.uuid, 'state': target_state})
+                 {'node': node.uuid,
+                  'target_state': target_state,
+                  'new_state': new_state})
 
 
 @task_manager.require_exclusive_lock

ironic/conf/conductor.py

@@ -131,6 +131,11 @@ opts = [
                       'ramdisk doing the cleaning. If the timeout is reached '
                       'the node will be put in the "clean failed" provision '
                       'state. Set to 0 to disable timeout.')),
+    cfg.IntOpt('soft_power_off_timeout',
+               default=600,
+               min=1,
+               help=_('Timeout (in seconds) of soft reboot and soft power '
+                      'off operation. This value always has to be positive.')),
 ]
 
 

ironic/drivers/base.py

@@ -31,6 +31,7 @@ import six
 from ironic.common import exception
 from ironic.common.i18n import _, _LE, _LW
 from ironic.common import raid
+from ironic.common import states
 from ironic.drivers.modules.network import common as net_common
 
 LOG = logging.getLogger(__name__)
@@ -493,25 +494,38 @@ class PowerInterface(BaseInterface):
         """
 
     @abc.abstractmethod
-    def set_power_state(self, task, power_state):
+    def set_power_state(self, task, power_state, timeout=None):
         """Set the power state of the task's node.
 
         :param task: a TaskManager instance containing the node to act on.
         :param power_state: Any power state from :mod:`ironic.common.states`.
+        :param timeout: timeout (in seconds) positive integer (> 0) for any
+          power state. ``None`` indicates to use default timeout.
         :raises: MissingParameterValue if a required parameter is missing.
         """
 
     @abc.abstractmethod
-    def reboot(self, task):
+    def reboot(self, task, timeout=None):
         """Perform a hard reboot of the task's node.
 
         Drivers are expected to properly handle case when node is powered off
         by powering it on.
 
         :param task: a TaskManager instance containing the node to act on.
+        :param timeout: timeout (in seconds) positive integer (> 0) for any
+          power state. ``None`` indicates to use default timeout.
         :raises: MissingParameterValue if a required parameter is missing.
         """
 
+    def get_supported_power_states(self, task):
+        """Get a list of the supported power states.
+
+        :param task: A TaskManager instance containing the node to act on.
+        :returns: A list with the supported power states defined
+                  in :mod:`ironic.common.states`.
+        """
+        return [states.POWER_ON, states.POWER_OFF, states.REBOOT]
+
 
 class ConsoleInterface(BaseInterface):
     """Interface for console-related actions."""

ironic/drivers/fake.py

@@ -78,6 +78,14 @@ class FakeDriver(base.BaseDriver):
         self.raid = fake.FakeRAID()
 
 
+class FakeSoftPowerDriver(FakeDriver):
+    """Example implementation of a Driver."""
+
+    def __init__(self):
+        super(FakeSoftPowerDriver, self).__init__()
+        self.power = fake.FakeSoftPower()
+
+
 class FakeIPMIToolDriver(base.BaseDriver):
     """Example implementation of a Driver."""
 

ironic/drivers/modules/fake.py

@@ -46,7 +46,7 @@ class FakePower(base.PowerInterface):
     def set_power_state(self, task, power_state):
         if power_state not in [states.POWER_ON, states.POWER_OFF]:
             raise exception.InvalidParameterValue(
-                _("set_power_state called with an invalid power"
+                _("set_power_state called with an invalid power "
                   "state: %s.") % power_state)
         task.node.power_state = power_state
 
@@ -54,6 +54,25 @@ class FakePower(base.PowerInterface):
         pass
 
 
+class FakeSoftPower(FakePower):
+    """Example implementation of a simple soft power operations."""
+
+    def set_power_state(self, task, power_state, timeout=None):
+        if power_state not in [states.POWER_ON, states.POWER_OFF,
+                               states.SOFT_REBOOT, states.SOFT_POWER_OFF]:
+            raise exception.InvalidParameterValue(
+                _("set_power_state called with an invalid power "
+                  "state: %s.") % power_state)
+        task.node.power_state = power_state
+
+    def reboot(self, task, timeout=None):
+        pass
+
+    def get_supported_power_states(self, task):
+        return [states.POWER_ON, states.POWER_OFF, states.REBOOT,
+                states.SOFT_REBOOT, states.SOFT_POWER_OFF]
+
+
 class FakeBoot(base.BootInterface):
     """Example implementation of a simple boot interface."""
 

ironic/tests/unit/api/v1/test_nodes.py

@@ -2345,21 +2345,120 @@ class TestPut(test_api_base.BaseApiTest):
         self.mock_dnih = p.start()
         self.addCleanup(p.stop)
 
-    def test_power_state(self):
+    def _test_power_state_success(self, target_state, timeout, api_version):
-        response = self.put_json('/nodes/%s/states/power' % self.node.uuid,
+        if timeout is None:
-                                 {'target': states.POWER_ON})
+            body = {'target': target_state}
+        else:
+            body = {'target': target_state, 'timeout': timeout}
+
+        if api_version is None:
+            response = self.put_json(
+                '/nodes/%s/states/power' % self.node.uuid, body)
+        else:
+            response = self.put_json(
+                '/nodes/%s/states/power' % self.node.uuid, body,
+                headers={api_base.Version.string: api_version})
+
         self.assertEqual(http_client.ACCEPTED, response.status_code)
         self.assertEqual(b'', response.body)
         self.mock_cnps.assert_called_once_with(mock.ANY,
                                                self.node.uuid,
-                                               states.POWER_ON,
+                                               target_state,
-                                               'test-topic')
+                                               timeout=timeout,
+                                               topic='test-topic')
         # Check location header
         self.assertIsNotNone(response.location)
         expected_location = '/v1/nodes/%s/states' % self.node.uuid
         self.assertEqual(urlparse.urlparse(response.location).path,
                          expected_location)
 
+    def _test_power_state_failure(self, target_state, http_status_code,
+                                  timeout, api_version):
+        if timeout is None:
+            body = {'target': target_state}
+        else:
+            body = {'target': target_state, 'timeout': timeout}
+
+        if api_version is None:
+            response = self.put_json(
+                '/nodes/%s/states/power' % self.node.uuid, body,
+                expect_errors=True)
+        else:
+            response = self.put_json(
+                '/nodes/%s/states/power' % self.node.uuid, body,
+                headers={api_base.Version.string: api_version},
+                expect_errors=True)
+
+        self.assertEqual('application/json', response.content_type)
+        self.assertEqual(http_status_code, response.status_code)
+        self.assertTrue(response.json['error_message'])
+
+    def test_power_state_power_on_no_timeout_no_ver(self):
+        self._test_power_state_success(states.POWER_ON, None, None)
+
+    def test_power_state_power_on_no_timeout_valid_soft_ver(self):
+        self._test_power_state_success(states.POWER_ON, None, "1.27")
+
+    def test_power_state_power_on_no_timeout_invalid_soft_ver(self):
+        self._test_power_state_success(states.POWER_ON, None, "1.26")
+
+    def test_power_state_power_on_valid_timeout_no_ver(self):
+        self._test_power_state_failure(
+            states.POWER_ON, http_client.NOT_ACCEPTABLE, 2, None)
+
+    def test_power_state_power_on_valid_timeout_valid_soft_ver(self):
+        self._test_power_state_success(states.POWER_ON, 2, "1.27")
+
+    def test_power_state_power_on_valid_timeout_invalid_soft_ver(self):
+        self._test_power_state_failure(
+            states.POWER_ON, http_client.NOT_ACCEPTABLE, 2, "1.26")
+
+    def test_power_state_power_on_invalid_timeout_no_ver(self):
+        self._test_power_state_failure(
+            states.POWER_ON, http_client.BAD_REQUEST, 0, None)
+
+    def test_power_state_power_on_invalid_timeout_valid_soft_ver(self):
+        self._test_power_state_failure(
+            states.POWER_ON, http_client.BAD_REQUEST, 0, "1.27")
+
+    def test_power_state_power_on_invalid_timeout_invalid_soft_ver(self):
+        self._test_power_state_failure(
+            states.POWER_ON, http_client.BAD_REQUEST, 0, "1.26")
+
+    def test_power_state_soft_power_off_no_timeout_no_ver(self):
+        self._test_power_state_failure(
+            states.SOFT_POWER_OFF, http_client.NOT_ACCEPTABLE, None, None)
+
+    def test_power_state_soft_power_off_no_timeout_valid_soft_ver(self):
+        self._test_power_state_success(states.SOFT_POWER_OFF, None, "1.27")
+
+    def test_power_state_soft_power_off_no_timeout_invalid_soft_ver(self):
+        self._test_power_state_failure(
+            states.SOFT_POWER_OFF, http_client.NOT_ACCEPTABLE, None, "1.26")
+
+    def test_power_state_soft_power_off_valid_timeout_no_ver(self):
+        self._test_power_state_failure(
+            states.SOFT_POWER_OFF, http_client.NOT_ACCEPTABLE, 2, None)
+
+    def test_power_state_soft_power_off_valid_timeout_valid_soft_ver(self):
+        self._test_power_state_success(states.SOFT_POWER_OFF, 2, "1.27")
+
+    def test_power_state_soft_power_off_valid_timeout_invalid_soft_ver(self):
+        self._test_power_state_failure(
+            states.SOFT_POWER_OFF, http_client.NOT_ACCEPTABLE, 2, "1.26")
+
+    def test_power_state_soft_power_off_invalid_timeout_no_ver(self):
+        self._test_power_state_failure(
+            states.SOFT_POWER_OFF, http_client.NOT_ACCEPTABLE, 0, None)
+
+    def test_power_state_soft_power_off_invalid_timeout_valid_soft_ver(self):
+        self._test_power_state_failure(
+            states.SOFT_POWER_OFF, http_client.BAD_REQUEST, 0, "1.27")
+
+    def test_power_state_soft_power_off_invalid_timeout_invalid_soft_ver(self):
+        self._test_power_state_failure(
+            states.SOFT_POWER_OFF, http_client.NOT_ACCEPTABLE, 0, "1.26")
+
     def test_power_state_by_name_unsupported(self):
         response = self.put_json('/nodes/%s/states/power' % self.node.name,
                                  {'target': states.POWER_ON},
@@ -2375,7 +2474,8 @@ class TestPut(test_api_base.BaseApiTest):
         self.mock_cnps.assert_called_once_with(mock.ANY,
                                                self.node.uuid,
                                                states.POWER_ON,
-                                               'test-topic')
+                                               timeout=None,
+                                               topic='test-topic')
         # Check location header
         self.assertIsNotNone(response.location)
         expected_location = '/v1/nodes/%s/states' % self.node.name

ironic/tests/unit/conductor/test_manager.py

@@ -85,6 +85,36 @@ class ChangeNodePowerStateTestCase(mgr_utils.ServiceSetUpMixin,
             # background task's link callback.
             self.assertIsNone(node.reservation)
 
+    def test_change_node_power_state_soft_power_off_timeout(self):
+        # Test change_node_power_state with timeout optional parameter
+        # including integration with conductor.utils.node_power_action and
+        # lower.
+        mgr_utils.mock_the_extension_manager(driver="fake_soft_power")
+        self.driver = driver_factory.get_driver("fake_soft_power")
+        node = obj_utils.create_test_node(self.context,
+                                          driver='fake_soft_power',
+                                          power_state=states.POWER_ON)
+        self._start_service()
+
+        with mock.patch.object(self.driver.power,
+                               'get_power_state') as get_power_mock:
+            get_power_mock.return_value = states.POWER_ON
+
+            self.service.change_node_power_state(self.context,
+                                                 node.uuid,
+                                                 states.SOFT_POWER_OFF,
+                                                 timeout=2)
+            self._stop_service()
+
+            get_power_mock.assert_called_once_with(mock.ANY)
+            node.refresh()
+            self.assertEqual(states.POWER_OFF, node.power_state)
+            self.assertIsNone(node.target_power_state)
+            self.assertIsNone(node.last_error)
+            # Verify the reservation has been cleared by
+            # background task's link callback.
+            self.assertIsNone(node.reservation)
+
     @mock.patch.object(conductor_utils, 'node_power_action')
     def test_change_node_power_state_node_already_locked(self,
                                                          pwr_act_mock):
@@ -135,7 +165,7 @@ class ChangeNodePowerStateTestCase(mgr_utils.ServiceSetUpMixin,
             self.assertEqual(exception.NoFreeConductorWorker, exc.exc_info[0])
 
             spawn_mock.assert_called_once_with(mock.ANY, mock.ANY,
-                                               mock.ANY)
+                                               mock.ANY, timeout=mock.ANY)
             node.refresh()
             self.assertEqual(initial_state, node.power_state)
             self.assertIsNone(node.target_power_state)
@@ -343,7 +373,8 @@ class ChangeNodePowerStateTestCase(mgr_utils.ServiceSetUpMixin,
                               states.POWER_ON)
 
             spawn_mock.assert_called_once_with(
-                conductor_utils.node_power_action, mock.ANY, states.POWER_ON)
+                conductor_utils.node_power_action, mock.ANY, states.POWER_ON,
+                timeout=None)
             self.assertFalse(mock_notif.called)
 
     @mock.patch('ironic.objects.node.NodeSetPowerStateNotification')
@@ -381,6 +412,33 @@ class ChangeNodePowerStateTestCase(mgr_utils.ServiceSetUpMixin,
                                      'baremetal.node.power_set.end',
                                      obj_fields.NotificationLevel.INFO)
 
+    def test_change_node_power_state_unsupported_state(self):
+        # Test change_node_power_state where unsupported power state raises
+        # an exception
+        initial_state = states.POWER_ON
+        node = obj_utils.create_test_node(self.context, driver='fake',
+                                          power_state=initial_state)
+        self._start_service()
+
+        with mock.patch.object(self.driver.power,
+                               'get_supported_power_states') as supported_mock:
+            supported_mock.return_value = [
+                states.POWER_ON, states.POWER_OFF, states.REBOOT]
+
+            exc = self.assertRaises(messaging.rpc.ExpectedException,
+                                    self.service.change_node_power_state,
+                                    self.context,
+                                    node.uuid,
+                                    states.SOFT_POWER_OFF)
+
+            self.assertEqual(exception.InvalidParameterValue, exc.exc_info[0])
+
+            node.refresh()
+            supported_mock.assert_called_once_with(mock.ANY)
+            self.assertEqual(states.POWER_ON, node.power_state)
+            self.assertIsNone(node.target_power_state)
+            self.assertIsNone(node.last_error)
+
 
 @mgr_utils.mock_record_keepalive
 class CreateNodeTestCase(mgr_utils.ServiceSetUpMixin,

ironic/tests/unit/conductor/test_rpcapi.py

@@ -188,7 +188,7 @@ class RPCAPITestCase(base.DbTestCase):
     def test_change_node_power_state(self):
         self._test_rpcapi('change_node_power_state',
                           'call',
-                          version='1.6',
+                          version='1.39',
                           node_id=self.fake_node['uuid'],
                           new_state=states.POWER_ON)
 

ironic/tests/unit/conductor/test_utils.py

@@ -495,6 +495,96 @@ class NodePowerActionTestCase(base.DbTestCase):
                     obj_fields.NotificationLevel.ERROR)
 
 
+class NodeSoftPowerActionTestCase(base.DbTestCase):
+
+    def setUp(self):
+        super(NodeSoftPowerActionTestCase, self).setUp()
+        mgr_utils.mock_the_extension_manager(driver="fake_soft_power")
+        self.driver = driver_factory.get_driver("fake_soft_power")
+
+    def test_node_power_action_power_soft_reboot(self):
+        """Test for soft reboot a node."""
+        node = obj_utils.create_test_node(self.context,
+                                          uuid=uuidutils.generate_uuid(),
+                                          driver='fake_soft_power',
+                                          power_state=states.POWER_ON)
+        task = task_manager.TaskManager(self.context, node.uuid)
+
+        with mock.patch.object(self.driver.power,
+                               'get_power_state') as get_power_mock:
+            get_power_mock.return_value = states.POWER_ON
+
+            conductor_utils.node_power_action(task, states.SOFT_REBOOT)
+
+            node.refresh()
+            get_power_mock.assert_called_once_with(mock.ANY)
+            self.assertEqual(states.POWER_ON, node['power_state'])
+            self.assertIsNone(node['target_power_state'])
+            self.assertIsNone(node['last_error'])
+
+    def test_node_power_action_power_soft_reboot_timeout(self):
+        """Test for soft reboot a node."""
+        node = obj_utils.create_test_node(self.context,
+                                          uuid=uuidutils.generate_uuid(),
+                                          driver='fake_soft_power',
+                                          power_state=states.POWER_ON)
+        task = task_manager.TaskManager(self.context, node.uuid)
+
+        with mock.patch.object(self.driver.power,
+                               'get_power_state') as get_power_mock:
+            get_power_mock.return_value = states.POWER_ON
+
+            conductor_utils.node_power_action(task, states.SOFT_REBOOT,
+                                              timeout=2)
+
+            node.refresh()
+            get_power_mock.assert_called_once_with(mock.ANY)
+            self.assertEqual(states.POWER_ON, node['power_state'])
+            self.assertIsNone(node['target_power_state'])
+            self.assertIsNone(node['last_error'])
+
+    def test_node_power_action_soft_power_off(self):
+        """Test node_power_action to turn node soft power off."""
+        node = obj_utils.create_test_node(self.context,
+                                          uuid=uuidutils.generate_uuid(),
+                                          driver='fake_soft_power',
+                                          power_state=states.POWER_ON)
+        task = task_manager.TaskManager(self.context, node.uuid)
+
+        with mock.patch.object(self.driver.power,
+                               'get_power_state') as get_power_mock:
+            get_power_mock.return_value = states.POWER_ON
+
+            conductor_utils.node_power_action(task, states.SOFT_POWER_OFF)
+
+            node.refresh()
+            get_power_mock.assert_called_once_with(mock.ANY)
+            self.assertEqual(states.POWER_OFF, node['power_state'])
+            self.assertIsNone(node['target_power_state'])
+            self.assertIsNone(node['last_error'])
+
+    def test_node_power_action_soft_power_off_timeout(self):
+        """Test node_power_action to turn node soft power off."""
+        node = obj_utils.create_test_node(self.context,
+                                          uuid=uuidutils.generate_uuid(),
+                                          driver='fake_soft_power',
+                                          power_state=states.POWER_ON)
+        task = task_manager.TaskManager(self.context, node.uuid)
+
+        with mock.patch.object(self.driver.power,
+                               'get_power_state') as get_power_mock:
+            get_power_mock.return_value = states.POWER_ON
+
+            conductor_utils.node_power_action(task, states.SOFT_POWER_OFF,
+                                              timeout=2)
+
+            node.refresh()
+            get_power_mock.assert_called_once_with(mock.ANY)
+            self.assertEqual(states.POWER_OFF, node['power_state'])
+            self.assertIsNone(node['target_power_state'])
+            self.assertIsNone(node['last_error'])
+
+
 class CleanupAfterTimeoutTestCase(tests_base.TestCase):
     def setUp(self):
         super(CleanupAfterTimeoutTestCase, self).setUp()

releasenotes/notes/soft-reboot-poweroff-9fdb0a4306dd668d.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - Support ``soft rebooting`` and ``soft power off`` requests to
+    change node's power state with API version 1.27, and also
+    introduce ``timeout`` optional parameter and
+    ``[conductor]/soft_power_off_timeout`` configuration option.
+    Custom power drivers may be enhanced to support this feature.

setup.cfg

@@ -52,6 +52,7 @@ ironic.drivers =
     agent_vbox = ironic.drivers.agent:AgentAndVirtualBoxDriver
     agent_ucs = ironic.drivers.agent:AgentAndUcsDriver
     fake = ironic.drivers.fake:FakeDriver
+    fake_soft_power = ironic.drivers.fake:FakeSoftPowerDriver
     fake_agent = ironic.drivers.fake:FakeAgentDriver
     fake_inspector = ironic.drivers.fake:FakeIPMIToolInspectorDriver
     fake_ipmitool = ironic.drivers.fake:FakeIPMIToolDriver