diff --git a/openstack/resource.py b/openstack/resource.py
index b4a1ed4d..de235464 100644
--- a/openstack/resource.py
+++ b/openstack/resource.py
@@ -248,15 +248,11 @@ class Resource(collections.MutableMapping):
         :param bool loaded: ``True`` if this Resource exists on
                             the server, ``False`` if it does not.
         """
-        if attrs is None:
-            attrs = {}
-
-        self._dirty = set() if loaded else set(attrs.keys())
+        self._attrs = {} if attrs is None else attrs.copy()
+        self._dirty = set() if loaded else set(self._attrs.keys())
+        self.update_attrs(self._attrs)
         self._loaded = loaded
 
-        self._attrs = attrs
-        self.update_attrs(attrs)
-
     def __repr__(self):
         return "%s.%s(attrs=%s, loaded=%s)" % (self.__module__,
                                                self.__class__.__name__,
diff --git a/openstack/telemetry/v2/sample.py b/openstack/telemetry/v2/sample.py
index 8a3159c0..ae6a5031 100644
--- a/openstack/telemetry/v2/sample.py
+++ b/openstack/telemetry/v2/sample.py
@@ -58,7 +58,9 @@ class Sample(resource.Resource):
     def create(self, session):
         url = self._get_url(self)
         # telemetry expects a list of samples
-        resp = session.post(url, service=self.service, json=[self._attrs])
+        attrs = self._attrs.copy()
+        attrs.pop('meter', None)
+        resp = session.post(url, service=self.service, json=[attrs])
         self.update_attrs(**resp.body.pop())
         self._reset_dirty()
         return self
diff --git a/openstack/tests/unit/cluster/v1/test_cluster.py b/openstack/tests/unit/cluster/v1/test_cluster.py
index 594850dc..14e5c543 100644
--- a/openstack/tests/unit/cluster/v1/test_cluster.py
+++ b/openstack/tests/unit/cluster/v1/test_cluster.py
@@ -78,7 +78,7 @@ class TestCluster(testtools.TestCase):
 
     def test_instantiate(self):
         sot = cluster.Cluster(FAKE)
-        self.assertEqual(FAKE['id'], sot.id)
+        self.assertIsNone(sot.id)
         self.assertEqual(FAKE['name'], sot.name)
 
         self.assertEqual(FAKE['profile_id'], sot.profile_id)
diff --git a/openstack/tests/unit/orchestration/v1/test_stack.py b/openstack/tests/unit/orchestration/v1/test_stack.py
index 33e98841..76f51e6b 100644
--- a/openstack/tests/unit/orchestration/v1/test_stack.py
+++ b/openstack/tests/unit/orchestration/v1/test_stack.py
@@ -93,9 +93,9 @@ class TestStack(testtools.TestCase):
         sot.create(sess)
 
         url = '/stacks'
-        body = FAKE.copy()
-        body.pop('id')
-        body.pop('name')
+        body = sot._attrs.copy()
+        body.pop('id', None)
+        body.pop('name', None)
         sess.post.assert_called_with(url, service=sot.service, json=body)
         self.assertEqual(FAKE_ID, sot.id)
         self.assertEqual(FAKE_NAME, sot.name)
diff --git a/openstack/tests/unit/telemetry/v2/test_sample.py b/openstack/tests/unit/telemetry/v2/test_sample.py
index a72ecd0b..e1191074 100644
--- a/openstack/tests/unit/telemetry/v2/test_sample.py
+++ b/openstack/tests/unit/telemetry/v2/test_sample.py
@@ -135,5 +135,5 @@ class TestSample(testtools.TestCase):
         new_sample.create(sess)
         url = '/meters/temperature'
         sess.post.assert_called_with(url, service=new_sample.service,
-                                     json=[SAMPLE])
+                                     json=[data])
         self.assertIsNone(new_sample.id)