Create scenario tests for loadbalancers

This patch implements the tempest plugin for basic load balancer
operations in Octavia. It contains tests for loadbalancer API and
a minimal operation test for loadbalancing functionality.

Steps for testing in devstack environment:

- Clone octavia-tempest-plugin repo, check out this patch, install
  octavia-tempest-plugin project.
- Create a tempest work directory by running 'tempest init <workdir>'.
  In the etc/tempest.conf, add 'loadbalancer = true' in
  'service_available' section.
- Set a big value to 'OS_TEST_TIMEOUT' in .testr.conf
- Add or modify other related config options (image, network, flavor,
  validation, etc).
- Run 'tempest run --regex ^octavia_tempest_plugin'

Co-Authored-By: Lingxian Kong <anlin.kong@gmail.com>
Co-Authored-By: Adam Harwell <flux.adam@gmail.com>
Change-Id: Ibc2904f431b15dfca2ff8e38e0d4d06c1430abea
diff --git a/octavia_tempest_plugin/plugin.py b/octavia_tempest_plugin/plugin.py
new file mode 100644
index 0000000..4d5f6a2
--- /dev/null
+++ b/octavia_tempest_plugin/plugin.py
@@ -0,0 +1,62 @@
+#   Copyright 2017 GoDaddy
+#   Copyright 2017 Catalyst IT Ltd
+#
+#   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 os
+
+from tempest import config
+from tempest.test_discover import plugins
+
+from octavia_tempest_plugin import config as project_config
+
+
+class OctaviaTempestPlugin(plugins.TempestPlugin):
+    def load_tests(self):
+        base_path = os.path.split(os.path.dirname(
+            os.path.abspath(__file__)))[0]
+        test_dir = "octavia_tempest_plugin/tests"
+        full_test_dir = os.path.join(base_path, test_dir)
+
+        return full_test_dir, base_path
+
+    def register_opts(self, conf):
+        conf.register_opt(
+            project_config.service_option, group='service_available'
+        )
+        conf.register_group(project_config.octavia_group)
+        conf.register_opts(project_config.OctaviaGroup,
+                           group=project_config.octavia_group.name)
+
+    def get_opt_lists(self):
+        return [
+            ('service_available', [project_config.service_option]),
+            (project_config.octavia_group.name, project_config.OctaviaGroup)
+        ]
+
+    def get_service_clients(self):
+        octavia_config = config.service_client_config(
+            project_config.octavia_group.name
+        )
+        module_path = 'octavia_tempest_plugin.services.v2.loadbalancer_client'
+
+        params = {
+            'name': 'octavia_v2',
+            'service_version': 'octavia.v2',
+            'module_path': module_path,
+            'client_names': ['LoadbalancerClient'],
+        }
+        params.update(octavia_config)
+
+        return [params]