如何使用 Terraform 模块进行跨账户工作

Question

我在 dev_account 创建了一个 codepipeline，它在 dev_account、test_account 和 prod_account 都触发了 codedeploy，三个帐户的 codedeploy 看起来相同，只是它们在不同的帐户中。

以下是我的 terraform 文件的组织结构。我使用 terraform 模块重用代码，但我仍然认为我的代码有很多重复代码，如何优化它们？

common_infr/
    codepipeline.tf # dev_account has codepipeline, codedeploy 
    codedeploy.tf   
    test_account/
        codedeploy.tf # test_account has a codedeploy
    prod_account/
        codedeploy.tf # prod_account has a codedeploy
pipeline1/
    main.tf #run terraform apply here using dev account
    test_account/
        main.tf #run terraform apply here using test account
    prod_account/
        main.tf #run terraform apply here using prod account

这是 pipeline1/main.tf:

module "pipeline1" {
  source       = "../common_infra"
  variable1    = "..."
  ...
}

这是 pipeline1/test_account/main.tf：

module "pipeline1" {
  source       = "../../common_infra/test_account"
  variable1    = "..."
  ...
}

这是 pipeline1/prod_account/main.tf：

module "pipeline1" {
  source       = "../../common_infra/prod_account"
  variable1    = "..."
  ...
}

三个帐户的 codedeploy.tf 看起来相同。如何优化？

Answer 1

不要为每个帐户的 codedeploy.tf 创建 3 个模块，而是创建一个 codedeploy 模块。在每个帐户的 main.tf 中，获取 codedeploy 模块和 pass in the account's provider。这是test_account 的样子。

provider "aws" {
  alias  = "test_account"
  profile = "your_profile_name_for_test_account"
}

module "pipeline1" {
  providers = {
    aws = "aws.test_account"
  }
  source       = "../../common_infra/codedeploy"
  variable1    = "..."
  ...
}

---

编辑以详细说明目录布局。最终，您将从 common_infr 中删除 codepipeline 并将其放入自己的模块中。

modules/
  codepipeline/
    codepipeline.tf
  common_infr/
    codedeploy.tf

accounts/
  test_account/
    main.tf
  prod_account/
    main.tf

test_account/main.tf：

provider "aws" {
  alias  = "test_account"
  profile = "your_profile_name_for_test_account"
}

module "pipeline1" {
  providers = {
    aws = "aws.test_account"
  }
  source       = "../modules/codepipeline"
  variable1    = "..."
  ...
}

module "common_infr" {
  providers = {
    aws = "aws.test_account"
  }
  source       = "../modules/common_infr"
  variable1    = "..."
  ...
}

prod_account/main.tf：

provider "aws" {
  alias  = "prod_account"
  profile = "your_profile_name_for_prod_account"
}

module "common_infr" {
  providers = {
    aws = "aws.prod_account"
  }
  source       = "../modules/common_infr"
  variable1    = "..."
  ...
}