enable all services are started at boot

roles/nova-compute/tasks/main.yml

@@ -38,6 +38,9 @@
     name: nova-compute.service
     state: restarted
 
+- name: start service at boot.
+  command: systemctl reenable nova-compute.service
+
 - 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'] }}"