Added command for device to cinder volume mapping

Added new sub command volume-attachments which displays the list
of volumes attached to a server.

Change-Id: I1f56a6fa18c35f3df2bdd11b9cf83bd5c5d9e182
Closes-Bug: #1116593

novaclient/tests/unit/v2/test_shell.py

@@ -2266,6 +2266,10 @@ class ShellTest(utils.TestCase):
             pos=-1
         )
 
+    def test_volume_attachments(self):
+        self.run_command('volume-attachments 1234')
+        self.assert_called('GET', '/servers/1234/os-volume_attachments')
+
     def test_volume_create(self):
         _, err = self.run_command('volume-create 2 --display-name Work')
         self.assertIn('Command volume-create is deprecated', err)

novaclient/v2/shell.py

@@ -2032,6 +2032,12 @@ def _translate_availability_zone_keys(collection):
                     [('zoneName', 'name'), ('zoneState', 'status')])
 
 
+def _translate_volume_attachments_keys(collection):
+    _translate_keys(collection,
+                    [('serverId', 'server_id'),
+                     ('volumeId', 'volume_id')])
+
+
 @cliutils.arg(
     '--all-tenants',
     dest='all_tenants',
@@ -2204,6 +2210,17 @@ def do_volume_detach(cs, args):
                                     args.attachment_id)
 
 
+@cliutils.arg(
+    'server',
+    metavar='<server>',
+    help=_('Name or ID of server.'))
+def do_volume_attachments(cs, args):
+    """List all the volumes attached to a server"""
+    volumes = cs.volumes.get_server_volumes(_find_server(cs, args.server).id)
+    _translate_volume_attachments_keys(volumes)
+    utils.print_list(volumes, ['ID', 'DEVICE', 'SERVER ID', 'VOLUME ID'])
+
+
 def do_volume_snapshot_list(cs, _args):
     """DEPRECATED: List all the snapshots."""
     emit_volume_deprecation_warning('volume-snapshot-list')