Implement stack export in openstacksdk

'stack export' for get stack data in JSON format
in this commit just get response by /export URL

Need json_dump when print out in CLI

story: 2010881
task: 48604
Change-Id: Iccb5d7a5f86a810fec5424ae1e44a792d69b4a65

doc/source/user/proxies/orchestration.rst

@@ -20,7 +20,8 @@ Stack Operations
   :noindex:
   :members: create_stack, check_stack, update_stack, delete_stack, find_stack,
             get_stack, get_stack_environment, get_stack_files,
-            get_stack_template, stacks, validate_template, resources
+            get_stack_template, stacks, validate_template, resources,
+            export_stack
 
 Software Configuration Operations
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

openstack/orchestration/v1/_proxy.py

@@ -24,6 +24,9 @@ from openstack import proxy
 from openstack import resource
 
 
+# TODO(rladntjr4): Some of these methods support lookup by ID, while
+#                  others support lookup by ID or name. We should choose one and use
+#                  it consistently.
 class Proxy(proxy.Proxy):
     _resource_registry = {
         "resource": _resource.Resource,
@@ -222,6 +225,21 @@ class Proxy(proxy.Proxy):
         res = self._get_resource(_stack.Stack, stack)
         return res.abandon(self)
 
+    def export_stack(self, stack):
+        """Get the stack data in JSON format
+
+        :param stack: The value can be the ID or a name or
+            an instance of :class:`~openstack.orchestration.v1.stack.Stack`
+        :returns: A dictionary containing the stack data.
+        :raises: :class:`~openstack.exceptions.ResourceNotFound`
+            when no resource can be found.
+        """
+        if isinstance(stack, _stack.Stack):
+            obj = stack
+        else:
+            obj = self._find(_stack.Stack, stack, ignore_missing=False)
+        return obj.export(self)
+
     def get_stack_template(self, stack):
         """Get template used by a stack
 

openstack/orchestration/v1/stack.py

@@ -179,6 +179,19 @@ class Stack(resource.Resource):
         resp = session.delete(url)
         return resp.json()
 
+    def export(self, session):
+        """Export a stack data
+
+        :param session: The session to use for making this request.
+        :return: A dictionary containing the stack data.
+        """
+        url = utils.urljoin(
+            self.base_path, self.name, self._get_id(self), 'export'
+        )
+        resp = session.get(url)
+        exceptions.raise_from_response(resp)
+        return resp.json()
+
     def fetch(
         self,
         session,

openstack/tests/unit/orchestration/v1/test_proxy.py

@@ -121,6 +121,35 @@ class TestOrchestrationStack(TestOrchestrationProxy):
             expected_args=[self.proxy],
         )
 
+    @mock.patch.object(stack.Stack, 'find')
+    def test_export_stack_with_identity(self, mock_find):
+        stack_id = '1234'
+        stack_name = 'test_stack'
+        stk = stack.Stack(id=stack_id, name=stack_name)
+        mock_find.return_value = stk
+
+        self._verify(
+            'openstack.orchestration.v1.stack.Stack.export',
+            self.proxy.export_stack,
+            method_args=['IDENTITY'],
+            expected_args=[self.proxy],
+        )
+        mock_find.assert_called_once_with(
+            mock.ANY, 'IDENTITY', ignore_missing=False
+        )
+
+    def test_export_stack_with_object(self):
+        stack_id = '1234'
+        stack_name = 'test_stack'
+        stk = stack.Stack(id=stack_id, name=stack_name)
+
+        self._verify(
+            'openstack.orchestration.v1.stack.Stack.export',
+            self.proxy.export_stack,
+            method_args=[stk],
+            expected_args=[self.proxy],
+        )
+
     def test_delete_stack(self):
         self.verify_delete(self.proxy.delete_stack, stack.Stack, False)
 

openstack/tests/unit/orchestration/v1/test_stack.py

@@ -272,6 +272,23 @@ class TestStack(base.TestCase):
             'stacks/%s/%s/abandon' % (FAKE_NAME, FAKE_ID),
         )
 
+    def test_export(self):
+        sess = mock.Mock()
+        sess.default_microversion = None
+
+        mock_response = mock.Mock()
+        mock_response.status_code = 200
+        mock_response.headers = {}
+        mock_response.json.return_value = {}
+        sess.get = mock.Mock(return_value=mock_response)
+        sot = stack.Stack(**FAKE)
+
+        sot.export(sess)
+
+        sess.get.assert_called_with(
+            'stacks/%s/%s/export' % (FAKE_NAME, FAKE_ID),
+        )
+
     def test_update(self):
         sess = mock.Mock()
         sess.default_microversion = None

releasenotes/notes/add-stack-export-3ace746a8c80d766.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Add ``export_stack`` to print stack infomation in a json format