当系统负载超过0.7时，则关掉httpd
--- - hosts: cache remote_user: root tasks: - shell: uptime | awk ‘{printf("%.2f",$(NF-2))}‘ register: result - service: name: httpd state: stopped when: result.stdout|float > 0.7
ansible-playbook-when案例
原文：https://www.cnblogs.com/lsgo/p/10422669.html
