Fix typo and add subscription docs

This commit fix a typo in the destination parameter
in tests and in doc, also including documentation
abou the subscription methods available via
vendor passthru.

Change-Id: Ifa82562d2ce8f34bd90dc5897a3b83fe9e8eb88b

doc/source/admin/drivers/redfish.rst

@@ -502,6 +502,82 @@ settings. The following fields will be returned in the BIOS API
     "``unique``", "The setting is specific to this node"
     "``reset_required``", "After changing this setting a node reboot is required"
 
+Node Vendor Passthru Methods
+============================
+
+.. csv-table::
+    :header: "Method", "Description"
+    :widths: 25, 120
+
+    "``create_subscription``", "Create a new subscription on the Node"
+    "``delete_subscription``", "Delete a subscription of a Node"
+    "``get_all_subscriptions``", "List all subscriptions of a Node"
+    "``get_subscription``", "Show a single subscription of a Node"
+
+
+Create Subscription
+~~~~~~~~~~~~~~~~~~~
+
+.. csv-table:: Request
+    :header: "Name", "In", "Type", "Description"
+    :widths: 25, 15, 15, 90
+
+    "Destination", "body", "string", "The URI of the destination Event Service"
+    "EventTypes (optional)", "body", "array",  "List of ypes of events that shall be sent to the destination"
+    "Context (optional)", "body", "string", "A client-supplied string that is stored with the event destination
+    subscription"
+    "Protocol (optional)", "body", "string", "The protocol type that the event will use for sending
+    the event to the destination"
+
+Example JSON to use in ``create_subscription``::
+
+    {
+        "Destination": "https://someurl",
+        "EventTypes": ["Alert"],
+        "Context": "MyProtocol",
+        "args": "Redfish"
+    }
+
+
+Delete Subscription
+~~~~~~~~~~~~~~~~~~~
+
+.. csv-table:: Request
+    :header: "Name", "In", "Type", "Description"
+    :widths: 21, 21, 21, 37
+
+    "id", "body", "string", "The Id of the subscription generated by the BMC "
+
+
+Example JSON to use in ``delete_subscription``::
+
+    {
+        "id": "<id of the subscription generated by the BMC>"
+    }
+
+
+Get Subscription
+~~~~~~~~~~~~~~~~
+
+.. csv-table:: Request
+    :header: "Name", "In", "Type", "Description"
+    :widths: 21, 21, 21, 37
+
+    "id", "body", "string", "The Id of the subscription generated by the BMC "
+
+
+Example JSON to use in ``get_subscription``::
+
+    {
+        "id": "<id of the subscription generated by the BMC>"
+    }
+
+
+Get All Subscriptions
+~~~~~~~~~~~~~~~~~~~~~
+
+The ``get_all_subscriptions`` doesn't require any parameters.
+
 .. _Redfish: http://redfish.dmtf.org/
 .. _Sushy: https://opendev.org/openstack/sushy
 .. _TLS: https://en.wikipedia.org/wiki/Transport_Layer_Security

ironic/drivers/modules/redfish/vendor.py

@@ -161,7 +161,7 @@ class RedfishVendorPassthru(base.VendorInterface):
     @base.passthru(['POST'], async_call=False,
                    description=_("Creates a subscription on a node. "
                                  "Required argument: a dictionary of "
-                                 "{'destination': 'destination_url'}"))
+                                 "{'Destination': 'destination_url'}"))
     def create_subscription(self, task, **kwargs):
         """Creates a subscription.
 

ironic/tests/unit/drivers/modules/redfish/test_vendor.py

@@ -254,7 +254,7 @@ class RedfishVendorPassthruTestCase(db_base.DbTestCase):
         subscription = mock.MagicMock()
         subscription.json.return_value = subscription_json
         mock_event_service.subscriptions.create = subscription
-        kwargs = {'destination': 'https://someurl'}
+        kwargs = {'Destination': 'https://someurl'}
 
         with task_manager.acquire(self.context, self.node.uuid,
                                   shared=True) as task: