Redundant ignore_changes element: in resource "aws_lambda_function" "this"

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難度
1/5
預估耗時
1 小時以內
新手友好度
55/100
Issue 類型
缺陷
描述清晰度
描述清楚
活躍度
停滯
技術堆疊
aws, terraform

研究方向

從 main.tf 中第 93–95 行附近的 lifecycle 區塊開始,檢查針對 aws_lambda_function 資源的 Terraform 警告。使用 Terraform v1.5.6、AWS provider v5.19.0 以及報告中描述的 s3_bucket/s3_key 模組設定重現此問題。完成標準是 terraform plan 或 apply 在沒有多餘 ignore_changes 警告的情況下完成。

由索引模型根據 Issue 內容生成。

描述

bug
Describe the Bug

When running terraform plan (or apply), a declaration of this module throws the following warning:

│ Warning: Redundant ignore_changes element
│
│   on .terraform/modules/foo.lambda_changes/main.tf line 21, in resource "aws_lambda_function" "this":
│   21: resource "aws_lambda_function" "this" {
│
│ Adding an attribute name to ignore_changes tells Terraform to ignore future changes to the argument in configuration after the object has been created, retaining the value originally configured.
│
│ The attribute last_modified is decided by the provider alone and therefore there can be no configured value to compare with. Including this attribute in ignore_changes has no effect. Remove the attribute from ignore_changes to quiet this
│ warning.
│
│ (and one more similar warning elsewhere)

The error is coming from the lifecycle block at https://github.com/cloudposse/terraform-aws-lambda-function/blob/0.5.1/main.tf#L93-L95

lifecycle {
  ignore_changes = [last_modified]
}
Expected Behavior

When running terraform plan (or apply), a declaration of this module does not throw a "Redundant ignore_changes element" warning

Steps to Reproduce

In my case, I declared this module with s3_bucket and s3_key:

module "lambda_responses" {
  source  = "cloudposse/lambda-function/aws"
  version = "0.5.1"

  function_name = "${module.lambda_label.id}-test"
  attributes    = concat(module.lambda_label.attributes, ["test"])
  description   = "Yay lambdas"
  s3_bucket     = var.responses_lambda_s3_bucket
  s3_key        = var.responses_lambda_s3_key
  runtime       = var.responses_lambda_runtime
  handler       = var.responses_lambda_handler
  architectures = ["x86_64"]
  context       = module.lambda_label.context
}

Then ran terraform apply from the root module shown above.
The Lambda and related resources were created just fine, but the Terraform run ended with the "ignore_changes" warning.

Environment

Versions:

  • Terraform v1.5.6
  • module cloudposse/lambda-function/aws 0.5.1
  • provider registry.terraform.io/hashicorp/aws v5.19.0
  • provider registry.terraform.io/hashicorp/time v0.9.1
Additional Context

Root cause and the reason for the lifecycle block in the first place: https://github.com/hashicorp/terraform-provider-aws/issues/29085

主要語言
HCL
星號
36
分支
44
PR 合併指標
30 天內沒有已合併 PR

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