Add default values for domain related options

Keystone V3 requires that the options os_user_domain_id/os_user_domain_name
and os_project_domain_id/os_project_domain_name be set. These options do not
have default values and novaclient will fail if they are not set by user.

This patch adds default values for os_project_domain_id and
os_user_domain_id in case of Keystone V3 env.
This is consistent with what the OpenStack CLI does.

Also, two functional tests are added to check authentication via
Keystone V2 and V3.

Partial-Bug: #1522402

Change-Id: Ieb41a7fbf24107f7250ef34218604fba96531195

novaclient/shell.py

@@ -767,6 +767,16 @@ class OpenStackComputeShell(object):
         os_auth_url = args.os_auth_url
         os_region_name = args.os_region_name
         os_auth_system = args.os_auth_system
+
+        if "v2.0" not in os_auth_url:
+            # NOTE(andreykurilin): assume that keystone V3 is used and try to
+            # be more user-friendly, i.e provide default values for domains
+            if (not args.os_project_domain_id and
+                    not args.os_project_domain_name):
+                setattr(args, "os_project_domain_id", "default")
+            if not args.os_user_domain_id and not args.os_user_domain_name:
+                setattr(args, "os_user_domain_id", "default")
+
         endpoint_type = args.endpoint_type
         insecure = args.insecure
         service_type = args.service_type

novaclient/tests/functional/test_auth.py

@@ -0,0 +1,42 @@
+# 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.
+
+from six.moves.urllib import parse
+import tempest_lib.cli.base
+
+from novaclient.tests.functional import base
+
+
+class TestAuthentication(base.ClientTestBase):
+    def nova(self, action, identity_api_version):
+        url = parse.urlparse(self.cli_clients.uri)
+        url = parse.urlunparse((url.scheme, url.netloc,
+                                '/v%s' % identity_api_version,
+                                url.params, url.query,
+                                url.fragment))
+        flags = ('--os-username %s --os-tenant-name %s --os-password %s '
+                 '--os-auth-url %s --endpoint-type publicURL' % (
+                     self.cli_clients.username,
+                     self.cli_clients.tenant_name,
+                     self.cli_clients.password,
+                     url))
+        if self.cli_clients.insecure:
+            flags += ' --insecure '
+
+        return tempest_lib.cli.base.execute(
+            "nova", action, flags, cli_dir=self.cli_clients.cli_dir)
+
+    def test_auth_via_keystone_v2(self):
+        self.nova("list", identity_api_version="2.0")
+
+    def test_auth_via_keystone_v3(self):
+        self.nova("list", identity_api_version="3")