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

问题描述

是否有可能将变量列表附加到静态列表中?

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变量:

I can define the whole list as a variable:

my_list:
  - 1
  - 2
  - 3

，然后在剧本中将其用作

and then use it in a playbook as

something: {{my_list}}

但是我似乎找不到如何执行此操作(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，那么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，但是其中一些是optional，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，可以通过变量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.

optional values事先未知，我可以添加1、2或100，所以它们不是静态的.

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++和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，但这仅适用于with_items，我需要在常规参数中使用它:

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

如果您确实想附加到内容，则需要使用set_fact模块.但是，如果您只想使用合并列表，则就像这样简单:

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时，它看起来像这样:

With set_fact it would look like this:

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

注意::如果您需要对级联列表进行其他操作，请确保将它们分组，如下所示:

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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