- hosts: master,slave
  remote_user: root
  gather_facts: True
  roles:
    - common
- hosts: master
  remote_user: root
  gather_facts: True
  roles:
    - master
  vars:
    logfile: /data/logs/redis
    file: redis.log
    dir: /data/redis
- hosts: slave
  remote_user: root
  gather_facts: True
  roles:
    - slave
  vars:
    logfile: /data/logs/redis
    file: redis.log
    dir: /data/redis
- hosts: sentinel
  remote_user: root
  gather_facts: True
  roles:
    - sentinel
  vars:
    logfile: /data/logs/redis
    file: sentinel.log
    dir: /data/sentinel