如何遍历CloudFormation模板中的值 [英] How to loop through values in a CloudFormation template

问题描述

我试图在AWS CloudFormation模板中传递逗号分隔的参数列表，并基于这些值创建多个Amazon S3存储桶.

I am trying to pass a list of comma separated parameters in an AWS CloudFormation template and create multiple Amazon S3 buckets based on those values.

我有一个要求，我将传递逗号分隔的国家/地区名称列表，然后CloudFormation模板将构建许多S3存储桶(基于传入参数的国家/地区名称).

I have a requirement where I will be passing a comma separated- list of country names and then the CloudFormation template would build that many S3 buckets (based on the names of countries passed in parameters).

例如，如果我在参数中传递 fr，us，gb ，则堆栈应创建 fr_myprod_bucket ， us_myprod_bucket ，gb_myprod_bucket .

For example, if I pass fr,us,gb in a parameter, the stack should create fr_myprod_bucket, us_myprod_bucket, gb_myprod_bucket.

我知道CloudFormation中没有for循环，所以不确定如何实现此目标吗?

I know there is no for loop in CloudFormation, so not sure how I can achieve this?

推荐答案

https://palletsprojects.com/p/jinja/是用于向CloudFormation模板添加for循环的另一个选项.您将需要先将Jinja模板呈现给它，然后再传递给CloudFormation，因为CloudFormation本身当前无法处理Jinja模板.

https://palletsprojects.com/p/jinja/ is another option for adding for-loops to CloudFormation templates. You will need to render the Jinja template before passing it to CloudFormation, as CloudFormation itself cannot currently process Jinja templates.

  {% for country in ["fr", "us", "gb"] %}
  {{country}}_myprod_bucket:
    Type: AWS::S3::Bucket
  {% endfor %}

Jinja代码段将产生的渲染结果:

Rendering that Jinja snippet would produce:

  fr_myprod_bucket:
    Type: AWS::S3::Bucket

  us_myprod_bucket:
    Type: AWS::S3::Bucket

  gb_myprod_bucket:
    Type: AWS::S3::Bucket

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