diff --git a/nova/compute_ironic/single.yml b/nova/compute_ironic/single.yml
index 3ddcc18..6534e43 100644
--- a/nova/compute_ironic/single.yml
+++ b/nova/compute_ironic/single.yml
@@ -10,6 +10,9 @@
       pkgs:
         - nova-compute-ironic
       instance_build_timeout: ${_param:nova_instance_build_timeout}
+      reserved_host_memory_mb: 0
+      reserved_host_disk_mb: 0
+      reserved_host_cpu: 0
       database:
         engine: mysql
         host: ${_param:control_address}