Summary

References:

1. https://etherpad.openstack.org/p/tripleo-composable-roles-work

2. https://review.opendev.org/#/c/245804/2/specs/mitaka/composable-services-within-roles.rst

3. https://review.opendev.org/#/q/topic:composable_service

4. https://docs.openstack.org/tripleo-docs/latest/install/advanced_deployment/template_deploy.html

5. http://hardysteven.blogspot.com.es/2015/05/tripleo-heat-templates-part-1-roles-and.html

6. http://hardysteven.blogspot.com.es/2015/05/tripleo-heat-templates-part-2-node.html

7. http://hardysteven.blogspot.com.es/2015/05/tripleo-heat-templates-part-3-cluster.html