Dynamic file content in Terraform

huangapple
go评论88阅读模式
英文:

Dynamic file content in Terraform

问题

I created a file dynamically in terraform. The creation goes into these steps:

  • reading the content of some template files
  • replacing the variables of the template with variables in terraform
  • concatenating all the contents in one single file

The template files are read not following the order I set in the reference terraform map.. How can I keep the map order in the for loops?

Here the code:

  1. locals {
  2.   template_filenames_with_vars = {
  3.     # key is template filename, value includes variables to replace in the template file
  4.     bbb = {
  5.       var = 1
  6.     }
  8.     aaa = {
  9.       var = 1
  10.     }
  11.   }
  12. }
  14. resource "local_file" "myfile" {
  15.   filename = "file.txt"
  17.   content = <<EOT
  18. ${
  19.   join("\n\n", [
  20.     for filename, vars in local.template_filenames_with_vars :
  21.         templatefile("${filename}.txt", vars)
  22.   ])
  23. }
  24.   EOT
  25. }

In the example, the for loop in the local_file content loops in the order aaa,bbb instead of bbb,aaa.

英文:

I created a file dynamically in terraform. The creation goes into these steps:

  • reading the content of some template files
  • replacing the variables of the template with variables in terraform
  • concatenating all the contents in one single file

The template files are read not following the order I set in the reference terraform map.. How can I keep the map order in the for loops?

Here the code:

  1. locals {
  2.   template_filenames_with_vars = {
  3.     # key is template filename, value includes variables to replace in the template file
  4.     bbb = {
  5.       var = 1
  6.     }
  8.     aaa = {
  9.       var = 1
  10.     }
  11.   }
  12. }
  14. resource &quot;local_file&quot; &quot;myfile&quot; {
  15.   filename = &quot;file.txt&quot;
  17.   content = &lt;&lt;EOT
  18. ${
  19.   join(&quot;\n\n&quot;, [
  20.     for filename, vars in local.template_filenames_with_vars :
  21.         templatefile(&quot;${filename}.txt&quot;, vars)
  22.   ])
  23. }
  24.   EOT
  25. }

In the example the for loop in the local_file content loops in the order aaa,bbb instead of bbb,aaa.

答案1

得分: 1

Terraform 在 for 循环中使用词汇排序，请参阅元素排序，来自文档：

对于字符串集合，Terraform 根据其值使用词汇排序元素。

所以在这种情况下无法保持映射顺序。

英文:

Terraform uses lexical sorting in for loops, see Element Ordering, from the docs:

> For sets of strings, Terraform sorts the elements by their value, using lexical sorting.

So it's not possible to keep the map order in this case.

答案2

得分: 0

如前面的帖子和评论所说，使用地图无法实现这一点，但如果我使用对象列表，就可以保持顺序：

  1. locals {
  2.   template_filenames_with_vars = [
  3.     {
  4.       name = "bbb"
  5.       vars = {
  6.         var = 1
  7.       }
  8.     },
  9.     {
  10.       name = "aaa"
  11.       vars = {
  12.         var = 1
  13.       }
  14.     },
  15.   ]
  16. }
  18. resource "local_file" "myfile" {
  19.   filename = "file.txt";
  21.   content = <<EOT
  22. ${
  23.   join("\n\n", [
  24.     for filename in local.template_filenames_with_vars :
  25.         templatefile("${filename.name}.txt", filename.vars)
  26.   ])
  27. }
  28.   EOT
  29. }

这将保持列表的顺序（先bbb，然后aaa）。

英文:

As previous post and comment said it is not possible to do that with maps, but it is possible to keep order if I use a list of objects:

  1. locals {
  2.   template_filenames_with_vars = [
  3.     {
  4.       name = &quot;bbb&quot;
  5.       vars = {
  6.         var = 1
  7.       }
  8.     },
  9.     {
  10.       name = &quot;aaa&quot;
  11.       vars = {
  12.         var = 1
  13.       }
  14.     },
  15.   ]
  16. }
  18. resource &quot;local_file&quot; &quot;myfile&quot; {
  19.   filename = &quot;file.txt&quot;
  21.   content = &lt;&lt;EOT
  22. ${
  23.   join(&quot;\n\n&quot;, [
  24.     for filename in local.template_filenames_with_vars :
  25.         templatefile(&quot;${filename.name}.txt&quot;, filename.vars)
  26.   ])
  27. }
  28.   EOT
  29. }

This keeps the order of the list (bbb then aaa).

huangapple
  • 本文由 发表于 2023年6月30日 00:37:31
  • 转载请务必保留本文链接：https://go.coder-hub.com/76583011.html
  • terraform
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定