The main idea is to create several env_var for one environment (production and development) in a GitHub repo.

主要思想是在GitHub存储库中为一个环境(生产和开发)创建多个env_var。

Using these variables, I can pass through each.key Keys are the environment names.
However, I need to realize how I iterate over nested values.
What do I need to use instead local.env_vars_git[each.key][0]["env_var_name"]?

使用这些变量，我可以遍历每个变量。Key键是环境名称。但是，我需要认识到如何迭代嵌套的值。我需要使用什么来代替local.env_vars_git[each.key][0][“env_var_name”]？

locals {
  env_vars_git = {
    production = [
      {
        env_var_name           = "hostname_01"
        env_var_value          = "%s"
      },
      {
        env_var_name           = "hostname_02"
        env_var_value          = "%s"
      }
    ],
    development = [
      {
        env_var_name           = "hostname_01"
        env_var_value          = "%s"
      },
      {
        env_var_name           = "hostname_02"
        env_var_value          = "%s"
      }
    ]
  }
}

resource "github_actions_environment_variable" "aws" {
  for_each      = local.env_vars_git
  repository    = github_repository.aws.name
  environment   = each.key
  variable_name = local.env_vars_git[each.key][0]["env_var_name"]
  value         = local.env_vars_git[each.key][0]["env_var_value"]
}

One way I have done nested loops in terraform is using modules...

我在Terraform中实现嵌套循环的一种方法是使用模块...

• Outside we loop over the outer elements (environments)


• Pass the inner elements list as a parameter


• Inside the module we loop over the inner elements (env variables)

Below is an example:

下面是一个示例：

I'm simplifying your locals but once you get the concept you can recomplicate that later if you like.

我正在简化你的本地人，但一旦你理解了概念，如果你愿意，你可以稍后再把它复杂化。

locals {
  env_vars_git = {
    production = {
      hostname_01 = "foo_prod"
      hostname_02 = "bar_prod"
    },
    development = {
      hostname_01 = "foo_dev"
      hostname_02 = "bar_dev"
    }
  }
}

module "test" {
  source = "./env_vars"

  for_each    = local.env_vars_git
  repository  = "github_repository.aws.name"
  environment = each.key
  variables   = each.value
}

then the module code is:

则模块代码为：

variable "repository" {
  type = string
}

variable "environment" {
  type = string
}

variable "variables" {
  type = map(string)
}

resource "null_resource" "sh_test" {
  for_each = var.variables
  provisioner "local-exec" {
    when        = create
    command     = "echo '${each.value}' "
    interpreter = ["/bin/sh", "-c"]
  }
}

You can see that I'm using a null_resource to just to output the values, but the same can be done with any other resource

您可以看到，我使用的是NULL_RESOURCE来输出值，但对任何其他资源也可以这样做

...and terraform apply looks like

...和Terraform应用看起来像

Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value: yes

module.test["development"].null_resource.sh_test["hostname_01"]: Creating...
module.test["development"].null_resource.sh_test["hostname_01"]: Provisioning with 'local-exec'...
module.test["development"].null_resource.sh_test["hostname_01"] (local-exec): Executing: ["/bin/sh" "-c" "echo 'foo_dev' "]
module.test["development"].null_resource.sh_test["hostname_01"] (local-exec): foo_dev
module.test["development"].null_resource.sh_test["hostname_01"]: Creation complete after 0s [id=7355436237029689557]

module.test["production"].null_resource.sh_test["hostname_01"]: Creating...
module.test["production"].null_resource.sh_test["hostname_01"]: Provisioning with 'local-exec'...
module.test["production"].null_resource.sh_test["hostname_01"] (local-exec): Executing: ["/bin/sh" "-c" "echo 'foo_prod' "]
module.test["production"].null_resource.sh_test["hostname_01"] (local-exec): foo_prod
module.test["production"].null_resource.sh_test["hostname_01"]: Creation complete after 0s [id=4455254562097512830]

module.test["development"].null_resource.sh_test["hostname_02"]: Creating...
module.test["development"].null_resource.sh_test["hostname_02"]: Provisioning with 'local-exec'...
module.test["development"].null_resource.sh_test["hostname_02"] (local-exec): Executing: ["/bin/sh" "-c" "echo 'bar_dev' "]
module.test["development"].null_resource.sh_test["hostname_02"] (local-exec): bar_dev
module.test["development"].null_resource.sh_test["hostname_02"]: Creation complete after 0s [id=2018334306873294541]

module.test["production"].null_resource.sh_test["hostname_02"]: Creating...
module.test["production"].null_resource.sh_test["hostname_02"]: Provisioning with 'local-exec'...
module.test["production"].null_resource.sh_test["hostname_02"] (local-exec): Executing: ["/bin/sh" "-c" "echo 'bar_prod' "]
module.test["production"].null_resource.sh_test["hostname_02"] (local-exec): bar_prod
module.test["production"].null_resource.sh_test["hostname_02"]: Creation complete after 0s [id=5766017297644124093]

I also have the code here:

https://github.com/heldersepu/hs-scripts/tree/master/TerraForm/module_loop

我这里也有代码：https://github.com/heldersepu/hs-scripts/tree/master/TerraForm/module_loop