Keep context for logging intact in greenthreads

* fixes bug 942918

Change-Id: Ia0fcf459c53b95a8675472adcfbba08014e34e5b

nova/context.py

@@ -81,7 +81,10 @@ class RequestContext(object):
         self.request_id = request_id
         self.auth_token = auth_token
         if overwrite or not hasattr(local.store, 'context'):
-            local.store.context = self
+            self.update_store()
+
+    def update_store(self):
+        local.store.context = self
 
     def to_dict(self):
         return {'user_id': self.user_id,

nova/image/s3.py

@@ -283,6 +283,7 @@ class S3ImageService(object):
 
         def delayed_create():
             """This handles the fetching and decrypting of the part files."""
+            context.update_store()
             log_vars = {'image_location': image_location,
                         'image_path': image_path}
             metadata['properties']['image_state'] = 'downloading'

nova/rpc/amqp.py

@@ -244,7 +244,7 @@ class ProxyCallback(object):
         """Thread that magically looks for a method on the proxy
         object and calls it.
         """
-
+        ctxt.update_store()
         try:
             node_func = getattr(self.proxy, str(method))
             node_args = dict((str(k), v) for k, v in args.iteritems())

nova/rpc/impl_carrot.py

@@ -283,7 +283,7 @@ class AdapterConsumer(Consumer):
         """Thread that magically looks for a method on the proxy
         object and calls it.
         """
-
+        ctxt.update_store()
         node_func = getattr(self.proxy, str(method))
         node_args = dict((str(k), v) for k, v in args.iteritems())
         # NOTE(vish): magic is fun!