CLI: Clone CG

This patch adds support for clone CG in cinderclient. It uses the
existing create CG from source command and adds an existing CG as a
source, in addition to a CG snapshot.

The server side patch is merged: https://review.openstack.org/#/c/203473/

Change-Id: I2a923de42348c22c6ae5ff5880cdbe6d719ea0ae
Partial-implements: blueprint clone-cg

cinderclient/tests/unit/v2/test_consistencygroups.py

@@ -94,8 +94,8 @@ class ConsistencygroupsTest(utils.TestCase):
     def test_update_consistencygroup_no_props(self):
         cs.consistencygroups.update('1234')
 
-    def test_create_consistencygroup_from_src(self):
-        cs.consistencygroups.create_from_src('5678', name='cg')
+    def test_create_consistencygroup_from_src_snap(self):
+        cs.consistencygroups.create_from_src('5678', None, name='cg')
         expected = {
             'consistencygroup-from-src': {
                 'status': 'creating',
@@ -103,7 +103,24 @@ class ConsistencygroupsTest(utils.TestCase):
                 'user_id': None,
                 'name': 'cg',
                 'cgsnapshot_id': '5678',
-                'project_id': None
+                'project_id': None,
+                'source_cgid': None
+            }
+        }
+        cs.assert_called('POST', '/consistencygroups/create_from_src',
+                         body=expected)
+
+    def test_create_consistencygroup_from_src_cg(self):
+        cs.consistencygroups.create_from_src(None, '5678', name='cg')
+        expected = {
+            'consistencygroup-from-src': {
+                'status': 'creating',
+                'description': None,
+                'user_id': None,
+                'name': 'cg',
+                'source_cgid': '5678',
+                'project_id': None,
+                'cgsnapshot_id': None
             }
         }
         cs.assert_called('POST', '/consistencygroups/create_from_src',

cinderclient/tests/unit/v2/test_shell.py

@@ -913,7 +913,7 @@ class ShellTest(utils.TestCase):
                           self.run_command,
                           'consisgroup-update 1234')
 
-    def test_consistencygroup_create_from_src(self):
+    def test_consistencygroup_create_from_src_snap(self):
         self.run_command('consisgroup-create-from-src '
                          '--name cg '
                          '--cgsnapshot 1234')
@@ -924,18 +924,45 @@ class ShellTest(utils.TestCase):
                 'description': None,
                 'user_id': None,
                 'project_id': None,
-                'status': 'creating'
+                'status': 'creating',
+                'source_cgid': None
             }
         }
         self.assert_called('POST', '/consistencygroups/create_from_src',
                            expected)
 
-    def test_consistencygroup_create_from_src_bad_request(self):
+    def test_consistencygroup_create_from_src_cg(self):
+        self.run_command('consisgroup-create-from-src '
+                         '--name cg '
+                         '--source-cg 1234')
+        expected = {
+            'consistencygroup-from-src': {
+                'name': 'cg',
+                'cgsnapshot_id': None,
+                'description': None,
+                'user_id': None,
+                'project_id': None,
+                'status': 'creating',
+                'source_cgid': '1234'
+            }
+        }
+        self.assert_called('POST', '/consistencygroups/create_from_src',
+                           expected)
+
+    def test_consistencygroup_create_from_src_fail_no_snap_cg(self):
         self.assertRaises(exceptions.BadRequest,
                           self.run_command,
                           'consisgroup-create-from-src '
                           '--name cg')
 
+    def test_consistencygroup_create_from_src_fail_both_snap_cg(self):
+        self.assertRaises(exceptions.BadRequest,
+                          self.run_command,
+                          'consisgroup-create-from-src '
+                          '--name cg '
+                          '--cgsnapshot 1234 '
+                          '--source-cg 5678')
+
     def test_set_image_metadata(self):
         self.run_command('image-metadata 1234 set key1=val1')
         expected = {"os-set_image_metadata": {"metadata": {"key1": "val1"}}}

cinderclient/v2/consistencygroups.py

@@ -67,12 +67,13 @@ class ConsistencygroupManager(base.ManagerWithFind):
 
         return self._create('/consistencygroups', body, 'consistencygroup')
 
-    def create_from_src(self, cgsnapshot_id, name=None,
+    def create_from_src(self, cgsnapshot_id, source_cgid, name=None,
                         description=None, user_id=None,
                         project_id=None):
-        """Creates a consistencygroup from a cgsnapshot.
+        """Creates a consistencygroup from a cgsnapshot or a source CG.
 
         :param cgsnapshot_id: UUID of a CGSnapshot
+        :param source_cgid: UUID of a source CG
         :param name: Name of the ConsistencyGroup
         :param description: Description of the ConsistencyGroup
         :param user_id: User id derived from context
@@ -82,6 +83,7 @@ class ConsistencygroupManager(base.ManagerWithFind):
         body = {'consistencygroup-from-src': {'name': name,
                                               'description': description,
                                               'cgsnapshot_id': cgsnapshot_id,
+                                              'source_cgid': source_cgid,
                                               'user_id': user_id,
                                               'project_id': project_id,
                                               'status': "creating",

cinderclient/v2/shell.py

@@ -2047,6 +2047,9 @@ def do_consisgroup_create(cs, args):
 @utils.arg('--cgsnapshot',
            metavar='<cgsnapshot>',
            help='Name or ID of a cgsnapshot. Default=None.')
+@utils.arg('--source-cg',
+           metavar='<source-cg>',
+           help='Name or ID of a source CG. Default=None.')
 @utils.arg('--name',
            metavar='<name>',
            help='Name of a consistency group. Default=None.')
@@ -2055,14 +2058,24 @@ def do_consisgroup_create(cs, args):
            help='Description of a consistency group. Default=None.')
 @utils.service_type('volumev2')
 def do_consisgroup_create_from_src(cs, args):
-    """Creates a consistency group from a cgsnapshot."""
-    if not args.cgsnapshot:
-        msg = ('Cannot create consistency group because the source '
-               'cgsnapshot is not provided.')
+    """Creates a consistency group from a cgsnapshot or a source CG."""
+    if not args.cgsnapshot and not args.source_cg:
+        msg = ('Cannot create consistency group because neither '
+               'cgsnapshot nor source CG is provided.')
         raise exceptions.BadRequest(code=400, message=msg)
-    cgsnapshot = _find_cgsnapshot(cs, args.cgsnapshot)
+    if args.cgsnapshot and args.source_cg:
+        msg = ('Cannot create consistency group because both '
+               'cgsnapshot and source CG are provided.')
+        raise exceptions.BadRequest(code=400, message=msg)
+    cgsnapshot = None
+    if args.cgsnapshot:
+        cgsnapshot = _find_cgsnapshot(cs, args.cgsnapshot)
+    source_cg = None
+    if args.source_cg:
+        source_cg = _find_consistencygroup(cs, args.source_cg)
     info = cs.consistencygroups.create_from_src(
-        cgsnapshot.id,
+        cgsnapshot.id if cgsnapshot else None,
+        source_cg.id if source_cg else None,
         args.name,
         args.description)