diff --git a/playbooks/nova_cellv2_host_discover.yaml b/playbooks/nova_cellv2_host_discover.yaml
index d82ebeb92..86e683b7b 100644
--- a/playbooks/nova_cellv2_host_discover.yaml
+++ b/playbooks/nova_cellv2_host_discover.yaml
@@ -17,5 +17,6 @@
       become: true
       changed_when: false
       delegate_to: '{{ groups[''nova_discovery_nodes''][0] }}'
+      run_once: true
       when:
         - discover_hosts|bool