Ansible-如何在lineinfile模块中使用三元函数? [英] Ansible - how to use ternary function with lineinfile module?

问题描述

如果主机名中没有该行，我们需要添加行.

We have requirement to add line if it is not in that file on basis of hostname.

这意味着:

• 如果主机名是abc，则行"ABC"转到/etc/app.conf
• 否则，行"XYZ"转到/etc/app.conf文件.

• if hostname is abc then line "ABC" goes to /etc/app.conf
• otherwise line "XYZ" goes to /etc/app.conf file.

有什么更好的方法呢?
我们是使用jinja2模板还是在剧本中定义逻辑?
请同时提出建议.

What would be better approach for this?
Do we use jinja2 template or define logic in playbook?
Please suggest on both.

推荐答案

这实际上是首选项和您要登录输出的问题.我想使用以下方法来完成这样一个简单的任务将是最简单的:

It's really a matter of preference and what you want to log in the output. I guess for such an easy task using the following would be easiest:

- name: Ensure line ABC is configured for host ABC
  lineinfile:
    dest: /etc/abc.conf
    line: "ABC"
  when: inventory_hostname == "abc"

- name: Ensure line XYZ is configured for hosts other than ABC
  lineinfile:
    dest: /etc/abc.conf
    line: "XYZ"
  when: inventory_hostname != "abc"

或在一项任务中使用三元过滤器:

Or use the ternary filter in one task:

- lineinfile:
    dest: /etc/abc.conf
    line: "{{ ( inventory_hostname == 'abc' ) | ternary ('ABC','XYZ') }}"

如果配置文件需要更多更改，或者您想确保配置完全符合您的要求，则模板文件会更合适.

If the configuration file required more changes or you'd want to ensure the configuration is exactly as you want, a template file would be a better fit.

这篇关于Ansible-如何在lineinfile模块中使用三元函数?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！