Support '--tags' for 'overcloud upgrade run'

This will allow more specialized usage of upgrade run command, similar
to patterns used with 'external-upgrade run', e.g. during
reprovisioning of nodes.

Also, validation on '--skip-tags' is removed because we should no
longer assume what tags are defined by the upgrade tasks, and we
should allow more free-form usage.

Change-Id: Icf672cc0db50ea6daa57d3c5abe131c82553fc5a
Implements: blueprint upgrades-with-os

tripleoclient/tests/v1/overcloud_upgrade/test_overcloud_upgrade.py

@@ -207,6 +207,39 @@ class TestOvercloudUpgradeRun(fakes.TestOvercloudUpgradeRun):
                     verbosity=1
                 )
 
+    @mock.patch('tripleoclient.workflows.package_update.update_ansible',
+                autospec=True)
+    @mock.patch('os.path.expanduser')
+    @mock.patch('oslo_concurrency.processutils.execute')
+    @mock.patch('six.moves.builtins.open')
+    def test_upgrade_role_all_playbooks_only_validation(
+            self, mock_open, mock_execute, mock_expanduser, upgrade_ansible):
+        mock_expanduser.return_value = '/home/fake/'
+        argslist = ['--roles', 'Compute', '--playbook', 'all',
+                    '--tags', 'validation']
+        verifylist = [
+            ('roles', 'Compute'),
+            ('static_inventory', None),
+            ('playbook', 'all'),
+            ('tags', 'validation')
+        ]
+
+        parsed_args = self.check_parser(self.cmd, argslist, verifylist)
+        with mock.patch('os.path.exists') as mock_exists:
+            mock_exists.return_value = True
+            self.cmd.take_action(parsed_args)
+            for book in constants.MAJOR_UPGRADE_PLAYBOOKS:
+                upgrade_ansible.assert_any_call(
+                    self.app.client_manager,
+                    nodes='Compute',
+                    inventory_file=mock_open().read(),
+                    playbook=book,
+                    node_user='tripleo-admin',
+                    tags='validation',
+                    skip_tags='',
+                    verbosity=1,
+                )
+
     @mock.patch('tripleoclient.workflows.package_update.update_ansible',
                 autospec=True)
     @mock.patch('os.path.expanduser')

tripleoclient/v1/overcloud_upgrade.py

@@ -166,6 +166,14 @@ class UpgradeRun(command.Command):
                             help=_("DEPRECATED: Only tripleo-admin should be "
                                    "used as ssh user.")
                             )
+        parser.add_argument('--tags',
+                            dest='tags',
+                            action="store",
+                            default="",
+                            help=_('A string specifying the tag or comma '
+                                   'separated list of tags to be passed '
+                                   'as --tags to ansible-playbook.')
+                            )
         parser.add_argument('--skip-tags',
                             dest='skip_tags',
                             action="store",
@@ -221,8 +229,9 @@ class UpgradeRun(command.Command):
                                            constants.MAJOR_UPGRADE_PLAYBOOKS,
                                            package_update,
                                            parsed_args.ssh_user,
-                                           skip_tags=skip_tags,
-                                           verbosity=verbosity)
+                                           parsed_args.tags,
+                                           skip_tags,
+                                           verbosity)
 
         playbooks = (constants.MAJOR_UPGRADE_PLAYBOOKS
                      if playbook == 'all' else playbook)