通过配置Proxy&Web Servers学习Ad-Hoc的组管理方式，前端Proxy只用到Nginx（）代理功能。

A.ansible proxy -m yum -a"name=http：//nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm state=present"
B.ansible proxy -m yum-a"name=nginx state=present"
C.ansible app-m yum -a"name=nginx state=present"
D.ansible proxy -m yum -a"name=/usr/local/src/nginx-release-centos-6-0.el6.ngx.noarch.rpm state=present"

A.on
B.yes
C.no
D.out

A.id opr
B.id nkv
C.id dba
D.id kjd