使用命令查看当前支持的strategy 列表及其描述
ansible-doc -t strategy -l
debug Executes tasks in interactive debug session
free Executes tasks without waiting for all hosts
host_pinned Executes tasks on each host without interruption
linear Executes tasks in a linear fashion is default
原文：https://www.cnblogs.com/leleyao/p/13190070.html