diff --git a/tripleoclient/tests/v2/overcloud_ceph/test_overcloud_ceph.py b/tripleoclient/tests/v2/overcloud_ceph/test_overcloud_ceph.py
index 51e614979..73184dbf5 100644
--- a/tripleoclient/tests/v2/overcloud_ceph/test_overcloud_ceph.py
+++ b/tripleoclient/tests/v2/overcloud_ceph/test_overcloud_ceph.py
@@ -74,6 +74,49 @@ class TestOvercloudCephDeploy(fakes.FakePlaybookExecution):
             }
         )
 
+    @mock.patch('tripleoclient.utils.get_ceph_networks', autospect=True)
+    @mock.patch('tripleoclient.utils.TempDirs', autospect=True)
+    @mock.patch('os.path.abspath', autospect=True)
+    @mock.patch('os.path.exists', autospect=True)
+    @mock.patch('tripleoclient.utils.run_ansible_playbook', autospec=True)
+    def test_deploy_ceph_spec(self, mock_playbook, mock_abspath,
+                              mock_path_exists, mock_tempdirs,
+                              mock_get_ceph_networks):
+        arglist = ['--yes',
+                   '--stack', 'overcloud',
+                   '--skip-user-create',
+                   '--mon-ip', '127.0.0.1',
+                   '--ceph-spec', 'ceph_spec.yaml',
+                   '--cephadm-ssh-user', 'jimmy',
+                   '--output', 'deployed-ceph.yaml',
+                   '--container-namespace', 'quay.io/ceph',
+                   '--container-image', 'ceph',
+                   '--container-tag', 'latest']
+        parsed_args = self.check_parser(self.cmd, arglist, [])
+        self.cmd.take_action(parsed_args)
+        mock_playbook.assert_called_once_with(
+            playbook='cli-deployed-ceph.yaml',
+            inventory=mock.ANY,
+            workdir=mock.ANY,
+            playbook_dir=mock.ANY,
+            verbosity=3,
+            skip_tags='cephadm_ssh_user',
+            reproduce_command=False,
+            extra_vars={
+                "deployed_ceph_tht_path": mock.ANY,
+                "working_dir": mock.ANY,
+                "stack_name": 'overcloud',
+                'tripleo_roles_path': mock.ANY,
+                'tripleo_cephadm_first_mon_ip': '127.0.0.1',
+                'dynamic_ceph_spec': False,
+                'ceph_spec_path': mock.ANY,
+                'tripleo_cephadm_container_ns': 'quay.io/ceph',
+                'tripleo_cephadm_container_image': 'ceph',
+                'tripleo_cephadm_container_tag': 'latest',
+                'tripleo_cephadm_ssh_user': 'jimmy',
+            }
+        )
+
     @mock.patch('os.path.abspath', autospect=True)
     @mock.patch('os.path.exists', autospect=True)
     def test_overcloud_deploy_ceph_no_overwrite(self, mock_abspath,
@@ -85,6 +128,16 @@ class TestOvercloudCephDeploy(fakes.FakePlaybookExecution):
         self.assertRaises(osc_lib_exc.CommandError,
                           self.cmd.take_action, parsed_args)
 
+    @mock.patch('os.path.abspath', autospect=True)
+    @mock.patch('os.path.exists', autospect=True)
+    def test_overcloud_deploy_ceph_no_metal(self, mock_abspath,
+                                            mock_path_exists):
+        arglist = ['--stack', 'overcloud',
+                   '--output', 'deployed-ceph.yaml']
+        parsed_args = self.check_parser(self.cmd, arglist, [])
+        self.assertRaises(osc_lib_exc.CommandError,
+                          self.cmd.take_action, parsed_args)
+
 
 class TestOvercloudCephUserDisable(fakes.FakePlaybookExecution):
     def setUp(self):
diff --git a/tripleoclient/v2/overcloud_ceph.py b/tripleoclient/v2/overcloud_ceph.py
index 365b0bce8..4e49879a0 100644
--- a/tripleoclient/v2/overcloud_ceph.py
+++ b/tripleoclient/v2/overcloud_ceph.py
@@ -75,11 +75,13 @@ class OvercloudCephDeploy(command.Command):
     def get_parser(self, prog_name):
         parser = super(OvercloudCephDeploy, self).get_parser(prog_name)
 
-        parser.add_argument('baremetal_env',
+        parser.add_argument('baremetal_env', nargs='?',
                             metavar='<deployed_baremetal.yaml>',
                             help=_('Path to the environment file '
                                    'output from "openstack '
-                                   'overcloud node provision".'))
+                                   'overcloud node provision". '
+                                   'This argument may be excluded '
+                                   'only if --ceph-spec is used.'))
         parser.add_argument('-o', '--output', required=True,
                             metavar='<deployed_ceph.yaml>',
                             help=_('The path to the output environment '
@@ -162,10 +164,12 @@ class OvercloudCephDeploy(command.Command):
         spec_group = parser.add_mutually_exclusive_group()
         spec_group.add_argument('--ceph-spec',
                                 help=_(
-                                    "Path to an existing Ceph spec file. "
-                                    "If not provided a spec will be generated "
+                                    "Path to an existing Ceph spec file. If "
+                                    "not provided a spec will be generated "
                                     "automatically based on --roles-data and "
-                                    "<deployed_baremetal.yaml>"),
+                                    "<deployed_baremetal.yaml>. The "
+                                    "<deployed_baremetal.yaml> parameter is "
+                                    "optional only if --ceph-spec is used."),
                                 default=None)
         spec_group.add_argument('--osd-spec',
                                 help=_(
@@ -235,14 +239,7 @@ class OvercloudCephDeploy(command.Command):
     def take_action(self, parsed_args):
         self.log.debug("take_action(%s)" % parsed_args)
 
-        baremetal_env_path = os.path.abspath(parsed_args.baremetal_env)
         output_path = os.path.abspath(parsed_args.output)
-
-        if not os.path.exists(baremetal_env_path):
-            raise oscexc.CommandError(
-                "Baremetal environment file does not exist:"
-                " %s" % parsed_args.baremetal_env)
-
         overwrite = parsed_args.yes
         if (os.path.exists(output_path) and not overwrite
                 and not oooutils.prompt_user_for_confirmation(
@@ -273,12 +270,27 @@ class OvercloudCephDeploy(command.Command):
 
         # mandatory extra_vars are now set, add others conditionally
         extra_vars = {
-            "baremetal_deployed_path": baremetal_env_path,
             "deployed_ceph_tht_path": output_path,
             "working_dir": working_dir,
             "stack_name": parsed_args.stack,
         }
         # optional paths to pass to playbook
+        if parsed_args.ceph_spec is None and \
+           parsed_args.baremetal_env is None:
+            raise oscexc.CommandError(
+                "Either <deployed_baremetal.yaml> "
+                "or --ceph-spec must be used.")
+
+        if parsed_args.baremetal_env:
+            baremetal_env_path = os.path.abspath(parsed_args.baremetal_env)
+            if not os.path.exists(baremetal_env_path):
+                raise oscexc.CommandError(
+                    "Baremetal environment file does not exist:"
+                    " %s" % parsed_args.baremetal_env)
+            else:
+                extra_vars['baremetal_deployed_path'] = \
+                    os.path.abspath(parsed_args.baremetal_env)
+
         if parsed_args.roles_data:
             if not os.path.exists(parsed_args.roles_data):
                 raise oscexc.CommandError(