Ansible字典键作为变量 [英] Ansible dictionary key as variable

问题描述

让我们在defaults/main.yml角色中有类似的内容:

Let's have something like this in role defaults/main.yml:

num: 0
config:
  0:
    a: true
    b: 'x'
  1:
    a: false
    b: 'y'
  2:
    a: false
    b: 'z'

现在，我在剧本调用中发送-e num=1，并且我想根据角色中其他位置的值使用a和b值，例如:

Now I send -e num=1 in playbook call, and I want to use values a and b based on this value somewhere else in the role, something like:

aValue: '{{config[num].a}}'
bValue: '{{config[num].b}}'

我该怎么做?我尝试过

aValue: '{{config[num].a}}' 但出现错误:'dict object' has no attribute u'1'

aValue: '{{config["num"].a}}' 但出现错误:'dict object' has no attribute 'num'

推荐答案

如果引用这些配置键，它们将变成字符串:

If you quote those config keys, they will become strings:

config:
  "0":
     a: true

或者，如果您的剧本的其余部分确实希望它们成为数字，则可以通过两种方式使num 实际上成为数字:

Or, if you have the rest of your playbook that really does want them to be numbers, you can make num actually be a number in two ways:

ansible -e '{"num": 1}'导致ansible将--extra-vars解析为JSON，其中"num"实际上将是Number(在JSON的意义上)

ansible -e '{"num": 1}' to cause ansible to parse --extra-vars as JSON, where "num" really will be a Number (in the JSON sense)

或强制num:

aValue: '{{ config[ (num|int) ].a }}'

这篇关于Ansible字典键作为变量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！