Start up nova-api service on an unused port if 0 is specified. Fixes bug 744150

nova/service.py

@@ -248,6 +248,12 @@ class WsgiService(object):
     def wait(self):
         self.wsgi_app.wait()
 
+    def get_port(self, api):
+        for i in xrange(len(self.apis)):
+            if self.apis[i] == api:
+                return self.wsgi_app.ports[i]
+        return None
+
 
 class ApiService(WsgiService):
     """Class for our nova-api service"""

nova/tests/integrated/integrated_helpers.py

@@ -141,6 +141,7 @@ class IntegratedUnitTestContext(object):
 
         self.api_service = api_service
 
-        self.auth_url = 'http://localhost:8774/v1.0'
+        host, port = api_service.get_port('osapi')
+        self.auth_url = 'http://%s:%s/v1.0' % (host, port)
 
         return api_service

nova/tests/integrated/test_login.py

@@ -33,6 +33,7 @@ FLAGS.verbose = True
 class LoginTest(test.TestCase):
     def setUp(self):
         super(LoginTest, self).setUp()
+        self.flags(ec2_listen_port=0, osapi_listen_port=0)
         self.context = integrated_helpers.IntegratedUnitTestContext()
         self.user = self.context.test_user
         self.api = self.user.openstack_api

nova/wsgi.py

@@ -61,6 +61,7 @@ class Server(object):
 
     def __init__(self, threads=1000):
         self.pool = eventlet.GreenPool(threads)
+        self.ports = []
 
     def start(self, application, port, host='0.0.0.0', backlog=128):
         """Run a WSGI server with the given application."""
@@ -68,6 +69,7 @@ class Server(object):
         logging.audit(_("Starting %(arg0)s on %(host)s:%(port)s") % locals())
         socket = eventlet.listen((host, port), backlog=backlog)
         self.pool.spawn_n(self._run, application, socket)
+        self.ports.append(socket.getsockname())
 
     def wait(self):
         """Wait until all servers have completed running."""