diff --git a/doc/source/microversion_testing.rst b/doc/source/microversion_testing.rst
index b4f06e3..50fd4f2 100644
--- a/doc/source/microversion_testing.rst
+++ b/doc/source/microversion_testing.rst
@@ -414,6 +414,10 @@
 
   .. _2.71: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id64
 
+  * `2.73`_
+
+  .. _2.73: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id66
+
 * Volume
 
   * `3.3`_
diff --git a/releasenotes/notes/add-worker-file-option-d949121a61156968.yaml b/releasenotes/notes/add-worker-file-option-d949121a61156968.yaml
new file mode 100644
index 0000000..6b10937
--- /dev/null
+++ b/releasenotes/notes/add-worker-file-option-d949121a61156968.yaml
@@ -0,0 +1,10 @@
+---
+features:
+  - |
+    Add the option --worker-file in ``tempest run`` command. This is to give
+    tempest more granularity to manually configure how the different sets of
+    tests can be grouped to run with the different worker. You can configure
+    tests regex to run under workers. You can also mix manual scheduling with
+    standard one by mentioning concurrency.
+    For example, the user can setup tempest to run with different concurrences,
+    to be used with different regexps.
diff --git a/tempest/cmd/run.py b/tempest/cmd/run.py
index f9ca2c7..d82b6df 100644
--- a/tempest/cmd/run.py
+++ b/tempest/cmd/run.py
@@ -47,6 +47,42 @@
 by removing unnecessary tests from a list file which is generated from
 ``--list-tests`` option.
 
+You can also use ``--worker-file`` option that let you pass a filepath to a
+worker yaml file, allowing you to manually schedule the tests run.
+For example, you can setup a tempest run with
+different concurrences to be used with different regexps.
+An example of worker file is showed below::
+
+    # YAML Worker file
+    - worker:
+      # you can have more than one regex per worker
+      - tempest.api.*
+      - neutron_tempest_tests
+    - worker:
+      - tempest.scenario.*
+
+This will run test matching with 'tempest.api.*' and 'neutron_tempest_tests'
+against worker 1. Run tests matching with 'tempest.scenario.*' under worker 2.
+
+You can mix manual scheduling with the standard scheduling mechanisms by
+concurrency field on a worker. For example::
+
+    # YAML Worker file
+    - worker:
+      # you can have more than one regex per worker
+      - tempest.api.*
+      - neutron_tempest_tests
+      concurrency: 3
+    - worker:
+      - tempest.scenario.*
+      concurrency: 2
+
+This will run tests matching with 'tempest.scenario.*' against 2 workers.
+
+This worker file is passed into stestr. For some more details on how it
+operates please refer to the stestr scheduling docs:
+https://stestr.readthedocs.io/en/stable/MANUAL.html#test-scheduling
+
 Test Execution
 ==============
 There are several options to control how the tests are executed. By default
@@ -185,6 +221,7 @@
                 blacklist_file=parsed_args.blacklist_file,
                 whitelist_file=parsed_args.whitelist_file,
                 black_regex=parsed_args.black_regex,
+                worker_path=parsed_args.worker_file,
                 load_list=parsed_args.load_list, combine=parsed_args.combine)
             if return_code > 0:
                 sys.exit(return_code)
@@ -254,6 +291,10 @@
                                  'on each newline. This command '
                                  'supports files created by the tempest '
                                  'run ``--list-tests`` command')
+        parser.add_argument('--worker-file', '--worker_file',
+                            help='Optional path to a worker file. This file '
+                            'contains each worker configuration to be '
+                            'used to schedule the tests run')
         # list only args
         parser.add_argument('--list-tests', '-l', action='store_true',
                             help='List tests',
diff --git a/tempest/lib/api_schema/response/compute/v2_73/__init__.py b/tempest/lib/api_schema/response/compute/v2_73/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tempest/lib/api_schema/response/compute/v2_73/__init__.py
diff --git a/tempest/lib/api_schema/response/compute/v2_73/servers.py b/tempest/lib/api_schema/response/compute/v2_73/servers.py
new file mode 100644
index 0000000..6e491e9
--- /dev/null
+++ b/tempest/lib/api_schema/response/compute/v2_73/servers.py
@@ -0,0 +1,78 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import copy
+
+from tempest.lib.api_schema.response.compute.v2_71 import servers as servers271
+
+
+###########################################################################
+#
+# 2.73:
+#
+# The locked_reason parameter is now returned in the response body of the
+# following calls:
+#
+# - POST /servers/{server_id}/action (where the action is rebuild)
+# - PUT /servers/{server_id} (update)
+# - GET /servers/{server_id} (show)
+# - GET /servers/detail (list)
+#
+###########################################################################
+
+# The "locked_reason" parameter will either be a string or None.
+locked_reason = {'type': ['string', 'null']}
+
+rebuild_server = copy.deepcopy(servers271.rebuild_server)
+rebuild_server['response_body']['properties']['server'][
+    'properties'].update({'locked_reason': locked_reason})
+rebuild_server['response_body']['properties']['server'][
+    'required'].append('locked_reason')
+
+rebuild_server_with_admin_pass = copy.deepcopy(
+    servers271.rebuild_server_with_admin_pass)
+rebuild_server_with_admin_pass['response_body']['properties']['server'][
+    'properties'].update({'locked_reason': locked_reason})
+rebuild_server_with_admin_pass['response_body']['properties']['server'][
+    'required'].append('locked_reason')
+
+update_server = copy.deepcopy(servers271.update_server)
+update_server['response_body']['properties']['server'][
+    'properties'].update({'locked_reason': locked_reason})
+update_server['response_body']['properties']['server'][
+    'required'].append('locked_reason')
+
+get_server = copy.deepcopy(servers271.get_server)
+get_server['response_body']['properties']['server'][
+    'properties'].update({'locked_reason': locked_reason})
+get_server['response_body']['properties']['server'][
+    'required'].append('locked_reason')
+
+list_servers_detail = copy.deepcopy(servers271.list_servers_detail)
+list_servers_detail['response_body']['properties']['servers']['items'][
+    'properties'].update({'locked_reason': locked_reason})
+list_servers_detail['response_body']['properties']['servers']['items'][
+    'required'].append('locked_reason')
+
+# NOTE(lajoskatona): Below are the unchanged schema in this microversion. We
+# need to keep this schema in this file to have the generic way to select the
+# right schema based on self.schema_versions_info mapping in service client.
+# ****** Schemas unchanged since microversion 2.71 ***
+list_servers = copy.deepcopy(servers271.list_servers)
+show_server_diagnostics = copy.deepcopy(servers271.show_server_diagnostics)
+get_remote_consoles = copy.deepcopy(servers271.get_remote_consoles)
+list_tags = copy.deepcopy(servers271.list_tags)
+update_all_tags = copy.deepcopy(servers271.update_all_tags)
+delete_all_tags = copy.deepcopy(servers271.delete_all_tags)
+check_tag_existence = copy.deepcopy(servers271.check_tag_existence)
+update_tag = copy.deepcopy(servers271.update_tag)
+delete_tag = copy.deepcopy(servers271.delete_tag)
diff --git a/tempest/lib/services/compute/servers_client.py b/tempest/lib/services/compute/servers_client.py
index a687137..cbf7a8c 100644
--- a/tempest/lib/services/compute/servers_client.py
+++ b/tempest/lib/services/compute/servers_client.py
@@ -35,6 +35,7 @@
 from tempest.lib.api_schema.response.compute.v2_63 import servers as schemav263
 from tempest.lib.api_schema.response.compute.v2_70 import servers as schemav270
 from tempest.lib.api_schema.response.compute.v2_71 import servers as schemav271
+from tempest.lib.api_schema.response.compute.v2_73 import servers as schemav273
 from tempest.lib.api_schema.response.compute.v2_8 import servers as schemav28
 from tempest.lib.api_schema.response.compute.v2_9 import servers as schemav29
 from tempest.lib.common import rest_client
@@ -59,7 +60,8 @@
         {'min': '2.57', 'max': '2.62', 'schema': schemav257},
         {'min': '2.63', 'max': '2.69', 'schema': schemav263},
         {'min': '2.70', 'max': '2.70', 'schema': schemav270},
-        {'min': '2.71', 'max': None, 'schema': schemav271}]
+        {'min': '2.71', 'max': '2.72', 'schema': schemav271},
+        {'min': '2.73', 'max': None, 'schema': schemav273}]
 
     def __init__(self, auth_provider, service, region,
                  enable_instance_password=True, **kwargs):
diff --git a/tempest/test_discover/plugins.py b/tempest/test_discover/plugins.py
index 7a037eb..b20b60e 100644
--- a/tempest/test_discover/plugins.py
+++ b/tempest/test_discover/plugins.py
@@ -194,11 +194,14 @@
     def get_plugin_load_tests_tuple(self):
         load_tests_dict = {}
         for plug in self.ext_plugins:
+            LOG.info('Loading tests from Tempest plugin: %s', plug.name)
             load_tests_dict[plug.name] = plug.obj.load_tests()
         return load_tests_dict
 
     def register_plugin_opts(self, conf):
         for plug in self.ext_plugins:
+            LOG.info('Register additional config options from Tempest '
+                     'plugin: %s', plug.name)
             try:
                 plug.obj.register_opts(conf)
             except Exception:
@@ -209,6 +212,9 @@
         plugin_options = []
         for plug in self.ext_plugins:
             opt_list = plug.obj.get_opt_lists()
+            LOG.info('List additional config options registered by '
+                     'Tempest plugin: %s', plug.name)
+
             if opt_list:
                 plugin_options.extend(opt_list)
         return plugin_options
diff --git a/tempest/tests/cmd/test_run.py b/tempest/tests/cmd/test_run.py
index 8997a4c..e9bbcc2 100644
--- a/tempest/tests/cmd/test_run.py
+++ b/tempest/tests/cmd/test_run.py
@@ -153,6 +153,15 @@
             result = ["b\'" + x + "\'" for x in result]
         self.assertEqual(result, tests)
 
+    def test_tempest_run_with_worker_file(self):
+        fd, path = tempfile.mkstemp()
+        self.addCleanup(os.remove, path)
+        worker_file = os.fdopen(fd, 'wb', 0)
+        self.addCleanup(worker_file.close)
+        worker_file.write(
+            '- worker:\n  - passing\n  concurrency: 3'.encode('utf-8'))
+        self.assertRunExit(['tempest', 'run', '--worker-file=%s' % path], 0)
+
     def test_tempest_run_with_whitelist(self):
         fd, path = tempfile.mkstemp()
         self.addCleanup(os.remove, path)