diff --git a/metadata/service/control/single.yml b/metadata/service/control/single.yml
index 5178b35..27c2527 100644
--- a/metadata/service/control/single.yml
+++ b/metadata/service/control/single.yml
@@ -23,6 +23,8 @@
       ram_allocation_ratio: 1.5
       disk_allocation_ratio: 1.0
       workers: 1
+      concurrency:
+        lock_path: '/var/lib/nova/tmp'
       bind:
         private_address: ${_param:single_address}
         public_address: ${_param:single_address}