add healthcheck option

supported by oslo middleware
return 200 ok if asked via url /healthcheck

Change-Id: I5cc0100f32e3f1e83f8d9a31c03f020615fc85ab

etc/vitrage/api-paste.ini

@@ -2,11 +2,17 @@
 use = egg:Paste#urlmap
 / = vitrageversions_pipeline
 /v1 = vitragev1_noauth_pipeline
+/healthcheck = healthcheck
 
 [composite:vitrage+keystone]
 use = egg:Paste#urlmap
 / = vitrageversions_pipeline
 /v1 = vitragev1_keystone_pipeline
+/healthcheck = healthcheck
+
+[app:healthcheck]
+use = egg:oslo.middleware#healthcheck
+oslo_config_project = vitrage
 
 [pipeline:vitrageversions_pipeline]
 pipeline = cors http_proxy_to_wsgi vitrageversions

etc/vitrage/vitrage-config-generator.conf

@@ -3,6 +3,7 @@ output_file = etc/vitrage/vitrage.conf
 wrap_width = 79
 namespace = vitrage
 namespace = datasources
+namespace = oslo.middleware.healthcheck
 namespace = oslo.log
 namespace = oslo.middleware
 namespace = oslo.policy

vitrage/tests/functional/api/v1/test_health.py

@@ -0,0 +1,29 @@
+# Copyright 2016 - Nokia Corporation
+# Copyright 2014 OpenStack Foundation
+#
+# 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.
+
+# noinspection PyPackageRequirements
+from vitrage.tests.functional import api
+
+
+class HealthTest(api.FunctionalTest):
+
+    def __init__(self, *args, **kwds):
+        super(HealthTest, self).__init__(*args, **kwds)
+        self.auth = 'keystone'
+
+    def test_health(self):
+        resp = self.app.get('/healthcheck')
+        self.assertEqual('200 OK', resp.status)