Ansible 和硬件检查 [英] Ansible and hardware checks

问题描述

我必须使用 ansible 检查 Linux 机器上的不同硬件和配置元素，但我完全不知道该怎么做(RAM、磁盘空间、DNS、CPU...)，我知道我几乎可以在 ansible 事实中找到我想要的所有内容，但我不知道如何使用它.

I have to check different hardware and configurations elements on Linux machines using ansible, and I am not sure at all about how to do it (RAM, disk space, DNS, CPU...), I've understood that I can find nearly all I want in the ansible facts, but I do not understand how I can use it.

例如，我必须检查 RAM 量是否至少为 4GB，否则会发出警报，因此我尝试了很多方法，但...没有任何效果.

For example, I have to check if the RAM amount is at least of 4GB and have an alarm if not, so I tried many things, and... nothing works.

这是我尝试过的示例.

 - hosts: client
   remote_user: user

  tasks:
      - debug: var=ansible_memory_mb
      - debug: msg="total RAM is {{ ansible_memory_mb.real.total }}"
      - fail: msg="not enough RAM"t
      - when: {{ ansible_memory_mb.real.total }} < 4096

你能告诉我它是如何工作的吗?也许有更好的方法可以使用 Ansible 做我想做的事?

Could you tell me how it works ? and maybe there is a better way to do what I want using Ansible ?

感谢您的回答.

推荐答案

您发布的代码段存在一些问题.

There are a few things wrong with the snippet you posted.

• 您的缩进已关闭.tasks 需要与 hosts 处于相同的缩进级别.

• Your indentation is off. tasks needs to be at the same indentation level as hosts.

when 条件需要成为 fail 任务块的一部分，而不是单独的列表项.

The when condition needs to be part of the fail task block, not a separate list item.

一般情况下，when 条件中不需要使用{{ ... }}，整个表达式将被视为Jinja模板.

In general, you do not need to use {{ ... }} in a when condition, the entire expression will be treated as a Jinja template.

试试这个:

- hosts: client
  remote_user: user
  tasks:
    - debug: var=ansible_memory_mb
    - debug: msg="total RAM is {{ ansible_memory_mb.real.total }}"
    - fail: msg="not enough RAM"
      when: ansible_memory_mb.real.total < 4096

您也可以使用 assert 模块来检查一个条件或条件列表.

You can also use the assert module to check a condition or list of conditions.

- assert:
    that:
      - ansible_memory_mb.real.total >= 4096
      - some other condition
      - ...

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