#role应用
#roles跟调用角色的剧本文件应该与roles同级关系,即放在ansible目录下
#makir /root/ansible/roles/{nginx,http,ftp,mysql,redis}
palybook.yml
roles/
    project/
        tasks/   定义task，role的基本元素，至少包含一个main.yml文件
        files/   存放由copy或script模块等调用的文件
        vars/     定义变量文件
        templates/  template模块查找所需要末班文件的目录
        handlers/
        default/  设定默认变量
#以nginx为例
思路：
1.group:创建用户组nginx
2.user:创建用户nginx
3.yum:安装nginx
4.template:配置文件更新nginx.conf
5.service:启动nginx
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cd /root/ansible/roles/nginx
mkdir tasks templates
cd task
touch group.yml
- name: create group nginx
    group: name=nginx gid=80
touch user.yml
-name: create user nginx
    user: name=nginx uid=80 group=nginx system=yes shell=/sbi/nologin
 
touch install.yml
- name: install package
    yum: name=nginx
   
touch start.yml
- name: start service
    service: name=nginx state=started enabled=yes
    
touch restart.yml
- name: restart service
    service: name=nginx state=restarted
    
touch templ.yml
- name: copy conf
    template: src=nginx.conf.j2 dest=/etc/nginx/conf/nginx.conf
    
touch main.yml
- include: group.yml
- include: user.yml
- include: install.yml
- include: templ.yml
- include: start.yml
      
cd ../templates  && ll
nginx.conf.j2
cd /root/ansible
touch nginx_role.yml
- hosts: websrvs
  remote_user: root
  roles:
    - role: nginx
执行命令：ansible-playbook nginx_role.yml