如何查找未在 Terraform 代码中使用的所有 tf​​vars 变量的列表? [英] How to find list of all tfvars variables which are not used in Terraform code?

问题描述

bucket = "first-bucket"
acl="private"
env = "dev"
owner = "[e-mail]"
var1 = "unused variable"

s3.tf

resource "aws_s3_bucket" "abucket" {
  bucket = var.bucket 
  acl = "private"

  tags = {
    Environment = var.env
    Owner = var.owner
  }
}

var1 未在我的代码中使用，即使它在 tfvars 中声明，如上所示.

var1 is not used in my code even though it is declared in tfvars as shown above.

当我运行以下命令时

terraform plan -var-file=s3.tfvars

...，我收到以下警告消息:

..., I get the following warning message:

Warning: Value for undeclared variable

The root module does not declare a variable named "var1" but a value was
found in file "s3.tfvars". To use this value, add a "variable" block to the
configuration.

有没有办法将此警告捕获为错误?或者有没有其他方法可以找出所有未使用变量的列表?

Is there a way to capture this warning as an error? Or is there Any other way to find out list of all unused variables?

推荐答案

你想使用 tflint.

mkdir test/
cd test/
echo 'variable "what" {}' > main.tf

$ tflint --enable-rule=terraform_unused_declarations
1 issue(s) found:

Warning: variable "what" is declared but not used (terraform_unused_declarations)

  on main.tf line 1:
   1: variable "what" {}

Reference: https://github.com/terraform-linters/tflint/blob/v0.28.1/docs/rules/terraform_unused_declarations.md

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