Adding image stores info command

This is an equivalent for ``glance stores-info``.

Depends-on: https://review.opendev.org/c/openstack/openstacksdk/+/883493
Change-Id: I15d2c2c523ace1cfb32045328ecee8ce8beea63f

Author: Mridula Joshi

openstackclient/image/v2/image.py

@@ -1836,3 +1836,48 @@ def take_action(self, parsed_args):
 
         info = _format_image(image)
         return zip(*sorted(info.items()))
+
+
+class StoresInfo(command.Lister):
+    _description = _(
+        "Get available backends (only valid with Multi-Backend support)"
+    )
+
+    def get_parser(self, prog_name):
+        parser = super().get_parser(prog_name)
+        parser.add_argument(
+            "--detail",
+            action='store_true',
+            default=None,
+            help=_(
+                'Shows details of stores (admin only) '
+                '(requires --os-image-api-version 2.15 or later)'
+            ),
+        )
+        return parser
+
+    def take_action(self, parsed_args):
+        image_client = self.app.client_manager.image
+        try:
+            columns = ("id", "description", "is_default")
+            column_headers = ("ID", "Description", "Default")
+            if parsed_args.detail:
+                columns += ("properties",)
+                column_headers += ("Properties",)
+
+            data = list(image_client.stores(details=parsed_args.detail))
+        except sdk_exceptions.ResourceNotFound:
+            msg = _('Multi Backend support not enabled')
+            raise exceptions.CommandError(msg)
+        else:
+            return (
+                column_headers,
+                (
+                    utils.get_item_properties(
+                        store,
+                        columns,
+                        formatters=_formatters,
+                    )
+                    for store in data
+                ),
+            )

openstackclient/tests/unit/image/v2/fakes.py

@@ -57,6 +57,7 @@ def __init__(self, **kwargs):
         self.get_task = mock.Mock()
 
         self.get_import_info = mock.Mock()
+        self.stores = mock.Mock()
 
         self.auth_token = kwargs['token']
         self.management_url = kwargs['endpoint']
@@ -171,6 +172,38 @@ def create_one_import_info(attrs=None):
     return _service_info.Import(**import_info)
 
 
+def create_one_stores_info(attrs=None):
+    """Create a fake stores info.
+
+    :param attrs: A dictionary with all attributes of stores
+    :type attrs: dict
+    :return: A fake Store object list.
+    :rtype: `openstack.image.v2.service_info.Store`
+    """
+    attrs = attrs or {}
+
+    stores_info = {
+        "stores": [
+            {
+                "id": "reliable",
+                "description": "More expensive store with data redundancy",
+            },
+            {
+                "id": "fast",
+                "description": "Provides quick access to your image data",
+                "default": True,
+            },
+            {
+                "id": "cheap",
+                "description": "Less expensive store for seldom-used images",
+            },
+        ]
+    }
+    stores_info.update(attrs)
+
+    return _service_info.Store(**stores_info)
+
+
 def create_one_task(attrs=None):
     """Create a fake task.
 

openstackclient/tests/unit/image/v2/test_image.py

@@ -2101,3 +2101,43 @@ def test_get_data_from_stdin__interactive(self):
             test_fd = _image.get_data_from_stdin()
 
             self.assertIsNone(test_fd)
+
+
+class TestStoresInfo(TestImage):
+    stores_info = image_fakes.create_one_stores_info()
+
+    def setUp(self):
+        super().setUp()
+
+        self.client.stores.return_value = self.stores_info
+
+        self.cmd = _image.StoresInfo(self.app, None)
+
+    def test_stores_info(self):
+        arglist = []
+        parsed_args = self.check_parser(self.cmd, arglist, [])
+        self.cmd.take_action(parsed_args)
+
+        self.client.stores.assert_called()
+
+    def test_stores_info_with_detail(self):
+        arglist = ['--detail']
+        parsed_args = self.check_parser(self.cmd, arglist, [])
+        self.cmd.take_action(parsed_args)
+
+        self.client.stores.assert_called_with(details=True)
+
+    def test_stores_info_neg(self):
+        arglist = []
+        parsed_args = self.check_parser(self.cmd, arglist, [])
+        self.client.stores.side_effect = sdk_exceptions.ResourceNotFound()
+
+        exc = self.assertRaises(
+            exceptions.CommandError,
+            self.cmd.take_action,
+            parsed_args,
+        )
+        self.assertIn(
+            "Multi Backend support not enabled",
+            str(exc),
+        )

releasenotes/notes/add-stores-info-9f1488dd29013767.yaml

@@ -0,0 +1,3 @@
+features:
+  - |
+    Add ``image stores info`` command, allowing users to know available backends.

setup.cfg

@@ -388,6 +388,9 @@ openstack.image.v2 =
     image_task_show = openstackclient.image.v2.task:ShowTask
     image_task_list = openstackclient.image.v2.task:ListTask
     image_import_info = openstackclient.image.v2.info:ImportInfo
+    image_import = openstackclient.image.v2.image:ImportImage
+    image_stores_list = openstackclient.image.v2.image:StoresInfo
+
 
     image_metadef_namespace_create = openstackclient.image.v2.metadef_namespaces:CreateMetadefNameSpace
     image_metadef_namespace_delete = openstackclient.image.v2.metadef_namespaces:DeleteMetadefNameSpace