playbook 包含多个play

[root@node01 ansible]# cat playbook.yml
- hosts: webservers
  remote_user: root
  tasks:
  - name: test connection
    ping:  
  - name: hostname
    raw: hostname
  - name: restart vsftpd
    service: name=vsftpd state=restarted enabled=yes 
- hosts: database
  remote_user: root
  tasks:
  - name: "start redis"
    service: name=redis state=started enabled=yes