---
 - hosts: "{{hostname}}"  ####这里是一个变量需要在运行playbook时指定 hostname的值
 remote_user: "{{user}}"  ####这里是一个变量需要在运行playbook时指定 user的值
 vars:
  - python_workdir: /home/Python-3.7.4   ###定义执行主机上python安装文件夹的路径
 tasks:
  - name: change selinux_config  # 临时修改selinux配置
   command: setenforce 0
   notify:
    - stop selinux   # 在临时修改selinux配置成功后通知程序在结束前替换selinux文件以确保服务器重启后selinux关闭依旧生效
  - name: install lib of kvm and python3  #安装依赖
   command: yum install -y qemu-kvm qemu-img virt-manager libvirt libvirt-python virt-manager libvirt-client virt-install virt-viewer virt-v2v gcc zlib zlib-devel openssl-devel libffi-devel
   notify:   #安装依赖成功后通知程序结束前开启libvirtd服务
    - libvirt_serivce 
  - name: add crontab_job  #添加任务计划，每5分钟清掉caches
   cron: name="drop_menmory" job="echo 1 > /proc/sys/vm/drop_caches" minute=*/5 state=present
  - name: copy python3 to remote_host  #从本地向远程服务器拷贝python安装文件家
   copy: src={{python_workdir}} dest=/home/
  - name: create workspace of python3
   command: mkdir /usr/local/python3  #在远程服务器上创建python运行的文件夹
  - name: change role of file #修改远程服务器上python安装文件的权限
   command: chmod +x {{python_workdir}}/configure 
  - name: make python3  ###进入远程服务器下python安装程序文件夹并执行python 源码编译及安装
   command: ./configure --prefix=/usr/local/python3 && make && make install chdir={{python_workdir}}
  - name: create links of python3 and pip3  #在远程服务器上创建python3及pip3的link
   command: ln -s /usr/local/python3/bin/{{item.name}} /usr/bin/{{item.link}}
   with_items:
    - {name: "python3.7", link: "python3"}
    - {name: "pip3.7", link: "pip3"}
 handlers:
  - name: libvirt_serivce
   service: name={{item.name}} state={{item.state}} enabled={{item.enable}}
   with_items:
    - {name: "libvirtd",state: "started",enable: "yes"}
    - {name: "firewalld",state: "stopped",enable: "no"}
  - name: stop selinux

[root@localhost ~] ansible-playbook test.yaml -e "hostname=X.X.X.X user=XXXX"