- hosts: all
  remote_user: root
  tasks:
    - name: Installed Nginx repo
      #模块名
      yum_repository:
        #repo库名字xxx.repo和[xxx]标签
        name: nginx
        #repo库里面的name名字
        description: nginx 
        baseurl: http://nginx.org/packages/centos/$releasever/$basearch/
        gpgcheck: no

结果