workflows/scale: re-use the deployment workbook to run Ansible

To avoid tasks duplications in the tripleo-common workbooks, let's
re-use the deployment workbook with the right parameters so we can avoid
all the config-download tasks.

This patch will reuse tripleo.deployment.v1.config_download_deploy with
the right parameters for a scale-down.

Depends-On: Ibc980e9162bf109de7e7ef338c9bd602174c8448
Change-Id: Ie8e15589197e9725a1cae2d29137f05fefa427c1

tripleoclient/tests/v1/overcloud_node/test_overcloud_node.py

@@ -65,7 +65,8 @@ class TestDeleteNode(fakes.TestDeleteNode):
 
         self.websocket.wait_for_messages.return_value = iter([{
             "execution_id": "IDID",
-            "status": "SUCCESS"
+            "status": "SUCCESS",
+            "message": "Success.",
         }])
 
         self.stack_name.return_value = mock.Mock(stack_name="overcast")
@@ -76,7 +77,7 @@ class TestDeleteNode(fakes.TestDeleteNode):
         self.workflow.executions.create.assert_called_with(
             'tripleo.scale.v1.delete_node',
             workflow_input={
-                'container': 'overcast',
+                'plan_name': 'overcast',
                 'nodes': ['instance1', 'instance2'],
                 'timeout': 90
             })
@@ -111,7 +112,8 @@ class TestDeleteNode(fakes.TestDeleteNode):
 
         self.websocket.wait_for_messages.return_value = iter([{
             "execution_id": "IDID",
-            "status": "SUCCESS"
+            "status": "SUCCESS",
+            "message": "Success.",
         }])
 
         self.cmd.take_action(parsed_args)
@@ -120,7 +122,7 @@ class TestDeleteNode(fakes.TestDeleteNode):
         self.workflow.executions.create.assert_called_with(
             'tripleo.scale.v1.delete_node',
             workflow_input={
-                'container': 'overcloud',
+                'plan_name': 'overcloud',
                 'nodes': ['instance1', ],
                 'timeout': 240
             })
@@ -142,17 +144,9 @@ class TestDeleteNode(fakes.TestDeleteNode):
                 following instances in stack overcloud: wrong_instance"""
         }])
 
-        self.assertRaises(exceptions.InvalidConfiguration,
-                          self.cmd.take_action, parsed_args)
-
         # Verify
-        self.workflow.executions.create.assert_called_with(
-            'tripleo.scale.v1.ansible_scale_down',
-            workflow_input={
-                'container': 'overcloud',
-                'nodes': ['wrong_instance', ],
-                'timeout': 240
-            })
+        self.assertRaises(exceptions.DeploymentError,
+                          self.cmd.take_action, parsed_args)
 
 
 class TestProvideNode(fakes.TestOvercloudNode):

tripleoclient/workflows/scale.py

@@ -14,7 +14,7 @@
 # under the License.
 from __future__ import print_function
 
-from tripleoclient.exceptions import InvalidConfiguration
+from tripleoclient import exceptions
 from tripleoclient.workflows import base
 
 
@@ -22,26 +22,30 @@ def ansible_tear_down(clients, **workflow_input):
 
     workflow_client = clients.workflow_engine
     tripleoclients = clients.tripleoclient
+    workflow_input['playbook_name'] = 'scale_playbook.yaml'
 
     with tripleoclients.messaging_websocket() as ws:
         execution = base.start_workflow(
             workflow_client,
-            'tripleo.scale.v1.ansible_scale_down',
+            'tripleo.deployment.v1.config_download_deploy',
             workflow_input=workflow_input
         )
 
         for payload in base.wait_for_messages(workflow_client, ws, execution):
-            status = payload['status']
-            if status == 'RUNNING':
-                continue
-            if status != 'SUCCESS':
-                raise InvalidConfiguration(payload['message'])
+            print(payload['message'])
+
+    if payload['status'] == 'SUCCESS':
+        print("Scale-down configuration completed.")
+    else:
+        raise exceptions.DeploymentError("Scale-down configuration failed.")
 
 
-def delete_node(clients, **workflow_input):
+def delete_node(clients, timeout, **workflow_input):
 
     workflow_client = clients.workflow_engine
     tripleoclients = clients.tripleoclient
+    if timeout is not None:
+        workflow_input['timeout'] = timeout
 
     with tripleoclients.messaging_websocket() as ws:
         execution = base.start_workflow(
@@ -55,7 +59,7 @@ def delete_node(clients, **workflow_input):
             if status == 'RUNNING':
                 continue
             if status != 'SUCCESS':
-                raise InvalidConfiguration(payload['message'])
+                raise exceptions.InvalidConfiguration(payload['message'])
 
 
 def scale_down(clients, plan_name, nodes, timeout=None):
@@ -68,12 +72,9 @@ def scale_down(clients, plan_name, nodes, timeout=None):
     """
 
     workflow_input = {
-        "container": plan_name,
+        "plan_name": plan_name,
         "nodes": nodes,
     }
 
-    if timeout is not None:
-        workflow_input['timeout'] = timeout
-
     ansible_tear_down(clients, **workflow_input)
-    delete_node(clients, **workflow_input)
+    delete_node(clients, timeout, **workflow_input)