lab:
  vars:
    ansible_host: localhost
    ansible_connection: local

  hosts:
    local:

  children:
    web:
        hosts:
            client1-web1:
                #ansible_port: 2222
            client1-web2:
        vars:
            ansible_user: root
    db:
        hosts:
            client1-db:
        #vars:
        #    ansible_become: true
        #    ansible_become_pass: password