如何使用分隔符在 Ansible 中分割值 [英] how to split value in Ansible with delimiter

问题描述

我正在 Ansible 中设置一个事实，并且该变量的值带有连字符，例如dos-e1-south-209334567829102380".我想拆分，所以我只能得到 "dos-e1-south"

I am setting a fact in Ansible and that variable has a value with hyphens, like this "dos-e1-south-209334567829102380". i want to split , so i only get "dos-e1-south"

这是剧本

- set_fact:
    config: "{{ asg.results|json_query('[*].launch_configuration_name') }}"

- debug:
    var: config

推荐答案

另一个选项是 ansibles 正则表达式过滤器，您可以在这里找到:https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html#regular-expression-filters

another option is ansibles regular expression filter, you find here: https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html#regular-expression-filters

vars:
  var: dos-e1-south-209334567829102380
tasks:
  - debug:
      msg: '{{ var | regex_replace("^(.*)-[^-]+$", "\\1") }}'

有相同的结果:

"msg": "dos-e1-south"

正则表达式说明:

^(.*)

在第一个反向引用中保留字符串开头的所有内容

keep everything from the start of the string in the first backreference

-[^-]+$

找到最后一个-"后跟非-"字符直到字符串结束.

find the last "-" followed by non-"-" characters till the end of string.

\\1

用第一个反向引用替换字符串.

replaces the string with the first backreference.

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