如何使用 Terraform 为 Elastic Beanstalk 环境定义条件（每个环境）设置？答案

【问题标题】：How can one define a conditional (per-environment) setting for Elastic Beanstalk environment with Terraform?如何使用 Terraform 为 Elastic Beanstalk 环境定义条件（每个环境）设置？
【发布时间】：2022-01-07 01:14:31
【问题描述】：

期望的结果

我想基于另一个变量 environment 有条件地为 aws_elastic_beanstalk_environment Terraform 资源定义 setting 块。

当前尝试

对于这种情况，我通常会使用count：

resource "aws_elastic_beanstalk_environment" "backend_prod" {
  name                   = "backend-${var.env}"
  application            = aws_elastic_beanstalk_application.backend.name
  solution_stack_name    = "64bit Amazon Linux 2 v3.4.9 running Docker"
  wait_for_ready_timeout = "10m"

  # other settings omitted

  setting {
    count     = var.environment == "prod" ? 1 : 0
    namespace = "aws:elasticbeanstalk:application:environment"
    name      = "API_KEY"
    value     = var.api_key
  }
}

目前的结果

不幸的是，每当我运行 terraform plan 时，都会导致：

An argument named "count" is not expected here.

【问题讨论】：

标签： amazon-web-services terraform amazon-elastic-beanstalk terraform-provider-aws

【解决方案1】：

您可以使用dynamic block：

resource "aws_elastic_beanstalk_environment" "backend_prod" {
  name                   = "backend-${var.env}"
  application            = aws_elastic_beanstalk_application.backend.name
  solution_stack_name    = "64bit Amazon Linux 2 v3.4.9 running Docker"
  wait_for_ready_timeout = "10m"

  # other settings omitted

  dynamic "setting" {

    for_each     = var.environment == "prod" ? [1] : []
  
    content {
        namespace = "aws:elasticbeanstalk:application:environment"
        name      = "API_KEY"
        value     = var.api_key
    }
  }
}

【讨论】：