Ensures that hostId's are unique

fixes bug #928015

Change-Id: I26e1e036ee56e0ee4344f9254df4c7024e0ceddf

2 files changed, 25 insertions, 1 deletions

diff --git a/nova/api/openstack/compute/views/servers.py b/nova/api/openstack/compute/views/servers.py
index 6a1622a66..e923c8286 100644
--- a/nova/api/openstack/compute/views/servers.py
+++ b/nova/api/openstack/compute/views/servers.py
@@ -146,8 +146,10 @@ class ViewBuilder(common.ViewBuilder):
     @staticmethod
     def _get_host_id(instance):
         host = instance.get("host")
+        project = str(instance.get("project_id"))
         if host:
-            return hashlib.sha224(host).hexdigest()  # pylint: disable=E1101
+            sha_hash = hashlib.sha224(project + host)  # pylint: disable=E1101
+            return sha_hash.hexdigest()
 
     def _get_addresses(self, request, instance):
         context = request.environ["nova.context"]
diff --git a/nova/tests/api/openstack/compute/test_servers.py b/nova/tests/api/openstack/compute/test_servers.py
index 14f49684f..3510932c9 100644
--- a/nova/tests/api/openstack/compute/test_servers.py
+++ b/nova/tests/api/openstack/compute/test_servers.py
@@ -19,6 +19,7 @@
 import datetime
 import json
 import urlparse
+import uuid
 
 from lxml import etree
 import webob
@@ -217,6 +218,27 @@ class ServersControllerTest(test.TestCase):
         res_dict = self.controller.show(req, FAKE_UUID)
         self.assertEqual(res_dict['server']['id'], FAKE_UUID)
 
+    def test_unique_host_id(self):
+        """Create two servers with the same host and different
+           project_ids and check that the hostId's are unique"""
+        def return_instance_with_host(self, *args):
+            project_id = str(uuid.uuid4())
+            return fakes.stub_instance(id=1, uuid=FAKE_UUID,
+                                       project_id=project_id,
+                                       host='fake_host')
+
+        self.stubs.Set(nova.db, 'instance_get_by_uuid',
+                       return_instance_with_host)
+        self.stubs.Set(nova.db, 'instance_get',
+                       return_instance_with_host)
+
+        req = fakes.HTTPRequest.blank('/v2/fake/servers/%s' % FAKE_UUID)
+        server1 = self.controller.show(req, FAKE_UUID)
+        server2 = self.controller.show(req, FAKE_UUID)
+
+        self.assertNotEqual(server1['server']['hostId'],
+                            server2['server']['hostId'])
+
     def test_get_server_by_id(self):
         self.flags(use_ipv6=True)
         image_bookmark = "http://localhost/fake/images/10"