将列表变量附加到 Ansible 中的另一个列表 [英] Append list variable to another list in Ansible

问题描述

是否可以将变量列表附加到 ansible 中的静态列表?

is it possible to append a variable list to a static list in ansible?

我可以将整个列表定义为一个变量:

I can define the whole list as a variable:

my_list:
  - 1
  - 2
  - 3

然后在剧本中使用它

something: {{my_list}}

但我似乎无法找到如何执行此操作(伪代码):

But I cannot seem to find how to do this (pseudo code):

list_to_append: 
  - 3
  - 4

然后在剧本中:

something:
  - 1
  - 2
  - {{append: list_to_append}}

如果这实际上是不可能的，您对我的用例有何建议?

If that is in fact impossible, what would you suggest for my use case?

我在参数中有一个项目列表，但其中一些是可选，应该可以使用变量进行修改.

I have a list of items in a parameter, but some of them are optional and should be modifiable using variables.

换句话说:我有 default values + optional values 可以或不能通过变量添加.

In other words: I have default values + optional values that could or could not be added via variables.

可选值 事先未知，我可以添加 1、2 或 100 个，因此它们不是静态的.

The optional values are not known in advance, I could add 1, 2 or 100 of them, so they are not static.

我基本上有一个默认的静态列表 ++ 一个要附加的可配置变量列表.

I basically have a default static list ++ a configurable variable list to append.

我找到了这个，但它仅适用于 with_items，我需要在普通参数中使用它:

edit: I found this but it's only for with_items and I need it in a normal parameter:

  with_flattened:
   - "{{list1}}"
   - "{{list2}}"

推荐答案

如果你真的想附加到内容，你需要使用 set_fact 模块.但是如果你只想使用合并的列表，就像这样简单:

If you really want to append to content, you will need to use the set_fact module. But if you just want to use the merged lists it is as easy as this:

{{ list1 + list2 }}

使用 set_fact 看起来像这样:

With set_fact it would look like this:

- set_fact:
    list_merged: "{{ list1 + list2 }}"

注意:如果您需要对串联列表进行额外的操作，请确保将它们分组如下:

NOTE: If you need to do additional operations on the concatenated lists be sure to group them like so:

- set_fact:
    list_merged: "{{ (list1 + list2) | ... }}"

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