Merge "Record instance actions and events"

1 files changed, 5 insertions, 1 deletions

diff --git a/nova/db/sqlalchemy/models.py b/nova/db/sqlalchemy/models.py
index b4c680ac0..2499b0291 100644
--- a/nova/db/sqlalchemy/models.py
+++ b/nova/db/sqlalchemy/models.py
@@ -1019,7 +1019,11 @@ class InstanceFault(BASE, NovaBase):
 
 
 class InstanceAction(BASE, NovaBase):
-    """Track client actions on an instance."""
+    """Track client actions on an instance.
+
+    The intention is that there will only be one of these per user request.  A
+    lookup by (instance_uuid, request_id) should always return a single result.
+    """
     __tablename__ = 'instance_actions'
     id = Column(Integer, primary_key=True, nullable=False, autoincrement=True)
     action = Column(String(255))