diff --git a/ansible/roles/blazar/tasks/bootstrap.yml b/ansible/roles/blazar/tasks/bootstrap.yml
index a0a09e580b..f6a24d6db6 100644
--- a/ansible/roles/blazar/tasks/bootstrap.yml
+++ b/ansible/roles/blazar/tasks/bootstrap.yml
@@ -33,28 +33,16 @@
   when:
     - not use_preconfigured_databases | bool
 
-# TODO(egonzalez) Use os_nova_host_aggregate ansible module once ansible min version is 2.3
-# http://docs.ansible.com/ansible/os_nova_host_aggregate_module.html
 - name: Creating blazar host aggregate
   become: true
-  command: >
-    docker exec kolla_toolbox openstack
-    --os-interface internal
-    --os-auth-url {{ openstack_auth.auth_url }}
-    --os-identity-api-version 3
-    --os-project-domain-name {{ openstack_auth.domain_name }}
-    --os-project-name {{ openstack_auth.project_name }}
-    --os-username {{ openstack_auth.username }}
-    --os-password {{ openstack_auth.password }}
-    --os-user-domain-name {{ openstack_auth.user_domain_name }}
-    --os-region-name {{ openstack_region_name }}
-    {% if openstack_cacert != '' %}--os-cacert {{ openstack_cacert }}{% endif %}
-    aggregate create {{ blazar_aggregate_pool_name }}
-  register: blazar_host_aggregate
-  changed_when: blazar_host_aggregate is success
-  failed_when:
-    - blazar_host_aggregate.rc != 0
-    - blazar_host_aggregate.stderr.find('already') == -1
+  kolla_toolbox:
+    module_name: os_nova_host_aggregate
+    module_args:
+      auth: "{{ openstack_auth }}"
+      cacert: "{{ openstack_cacert }}"
+      endpoint_type: "{{ openstack_interface }}"
+      region_name: "{{ openstack_region_name }}"
+      name: "{{ blazar_aggregate_pool_name }}"
   run_once: True
   delegate_to: "{{ groups['blazar-api'][0] }}"