在对语句进行分组时使用通配符

Question

我只想在主机位于组*beat时执行任务，如下所示。

when:
- (groups['*beat'] is defined and inventory_hostname in groups['*beat'])

这不起作用。该任务一直被跳过。

有人知道我如何才能达到预期的行为吗？

Answer 1

从另一个角度看待手头的问题可能会有所帮助：您可以列出主机所在的组，然后用变量group_names和select只列出与您的模式匹配的组，而不是试图查找您正在循环的当前主机是否真的在特定的组模式中
从那时起，如果列表为空，则表示您的主机不在符合该模式的组中。

给定库存：

all:
hosts:
localhost:
vars:
ansible_connection: local
children:
heartbeat:
hosts:
rate:
diastole:
systole:

filebeat:
hosts:
syslog:
file:
stdout:
fox:
hosts:
brown:
jump:
over:
lazy:
dog: 

战术手册：

- hosts: all
gather_facts: no  

tasks:
- debug:
msg: "I am in a group named *beat"
when: 
- group_names | select('match', '^(.*)beat$') | list | length > 0

它给出输出：

PLAY [all] ********************************************************************************************************
TASK [debug] ******************************************************************************************************
skipping: [localhost]
ok: [rate] => {
"msg": "I am in a group named *beat"
}
ok: [diastole] => {
"msg": "I am in a group named *beat"
}
ok: [systole] => {
"msg": "I am in a group named *beat"
}
ok: [syslog] => {
"msg": "I am in a group named *beat"
}
ok: [file] => {
"msg": "I am in a group named *beat"
}
ok: [stdout] => {
"msg": "I am in a group named *beat"
}
skipping: [brown]
skipping: [jump]
skipping: [over]
skipping: [lazy]
skipping: [dog]
PLAY RECAP ********************************************************************************************************
brown                      : ok=0    changed=0    unreachable=0    failed=0    skipped=1    rescued=0    ignored=0   
diastole                   : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
dog                        : ok=0    changed=0    unreachable=0    failed=0    skipped=1    rescued=0    ignored=0   
file                       : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
jump                       : ok=0    changed=0    unreachable=0    failed=0    skipped=1    rescued=0    ignored=0   
lazy                       : ok=0    changed=0    unreachable=0    failed=0    skipped=1    rescued=0    ignored=0   
localhost                  : ok=0    changed=0    unreachable=0    failed=0    skipped=1    rescued=0    ignored=0   
over                       : ok=0    changed=0    unreachable=0    failed=0    skipped=1    rescued=0    ignored=0   
rate                       : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
stdout                     : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
syslog                     : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
systole                    : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0