ansible批量修改redis和sentinel的密码

最近在读《infrastructure as code》这本书，书中给了一个怪圈。 大概是这个意思：

服务器配置不一致 -》 不敢用自动化工具，害怕用会损坏什么 -》 因此在自动化工具外手动操作 -》 导致近一步的配置不一致

然后就如此恶性循环，因此从今天起所有操作必须强迫自己用自动化工具做，帮自己跳出怪圈。
好，直接上代码：

- hosts: 'redis-cluster-p*'
  tasks:
        - name: stop redis
          service:
                name: redis
                state: stopped
        - name: stop redis-sentinel
          service:
                name: redis-sentinel
                state: stopped
        - name: change masterauth
          lineinfile:
                path: /etc/redis.conf
                regexp: '^masterauth'
                line: 'masterauth newpasswordxxx'
                backup: yes
        - name: change requirepass
          lineinfile:
                path: /etc/redis.conf
                regexp: '^requirepass'
                line: 'requirepass newpasswordxxx'
                backup: yes
        - name: change  sentinel
          lineinfile:
                path: /etc/redis-sentinel.conf
                regexp: '^sentinel auth-pass mymaster'
                line: 'sentinel auth-pass mymaster newpasswordxxx'
                backup: yes
        - name: start redis
          service:
                name: redis
                state: started
        - name: start redis-sentinel
          service:
                name: redis-sentinel
                state: started