diff --git a/roles/nova-compute/tasks/main.yml b/roles/nova-compute/tasks/main.yml
index 7d1a029..ec132ea 100644
--- a/roles/nova-compute/tasks/main.yml
+++ b/roles/nova-compute/tasks/main.yml
@@ -36,3 +36,7 @@
   systemd:
     name: nova-compute.service
     state: restarted
+
+- name: let nova controler discover new host
+  command: docker exec -i nova-controller.service nova-manage cell_v2 discover_hosts
+  delegate_to: "{{ hostvars[groups['nova-controller'][0]]['ansible_hostname'] }}"