bootstrap.yml

- hosts: testserver
  remote_user: root
 
  roles:
    - { role: configs }
    - { role: users }
    - { role: sudo }

lamp.yml

# playbooks/lamp.yml

- include: /etc/ansible/playbooks/bootstrap.yml
- include: /etc/ansible/playbooks/webserver.yml

main.yml

# roles/webserver/tasks/main.yml

- name: Ensure latest version of Apache is installed
  yum: name=httpd state=latest
  when: ansible_os_family == 'RedHat'

webserver.yml

- hosts: testserver
  remote_user: foo
  
  roles:
    - { role: webserver }