语言格式：yml
单个yml文件示例：
---
- hosts: webservers #主机组
vars: ##变量设置
http_port: 80
max_clients: 200
remote_user: root
tasks: ###主要任务
- name: ensure apache is at the latest version
yum: pkg=httpd state=latest
- name: write the apache config file
template: src=/srv/httpd.j2 dest=/etc/httpd.conf
notify: ##条件触发
- restart apache ##重启服务
- name: ensure apache is running
service: name=httpd state=started
handlers: ##在发生改变时执行的操作
- name: restart apache
service: name=httpd state=restarted
‘notify’ 下列出的即是 handlers.
ansible-playbook基本介绍
项目结构：
site.yml webservers.yml fooservers.yml roles/ common/ files/ templates/ tasks/ handlers/ vars/ defaults/ meta/ webservers/ files/ templates/ tasks/ handlers/ vars/ defaults/ meta/
