template引用系统变量（setup）

一、template引用系统变量

ansible websrvs -m setup |grep ‘cpu’

vim templates/nginx.conf.j2

worker_processes {{ ansible_processor_vcpus+2 }};

 

vim testtemplate.yml

—

– hosts:os6

  remote_user: root

 

  tasks:

    – name: install package

      yum: name=nginx

    – name: copy template

      template: src=nginx.conf.j2 dest=/etc/nginx/nginx.conf

      notify: restart service

    – name: start service

      service: name=nginx state=started enabled=yes

 

  handlers:

    – name: restart service

      service:name=nginx state=restarted

 

执行结果：再次运行playbook后，我们发现worker process进程数量等于cpu核心数量加2，这样template

就能帮我们实现根据不同主机性能定制相应的配置。