ansible module: group_by

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ansible中的group_by模块借助Facts可以用来创建匹配特定标准的主机的动态组。
- hosts: all
tasks:

- name: Create a group of all hosts by operating system

  group_by: key={{ansible_distribution}}-{{ansible_distribution_version}}
#组名中间不要留空格
- hosts: CentOS-6.2    #CentOS-6.2即引用上面group_by创建的value

tasks:

- name: ping all CentOS 6.2 hosts

  ping:

- hosts: CentOS-6.3

tasks:

- name: ping all CentOS 6.3 hosts
  ping:
附：
Facts are information derived from speaking with your remote systems.
#ansible hostname -m setup
172.28.15.22    shanghai
172.28.10.113    movie
172.28.11.113    zhuanti
172.28.10.107    openapi
apache mpm由prefork换成event   


deny  61.152.175.53;
allow all;