多个 aws_rds_cluster_instance 使用 for_each

Question

我想创建一个模块

在我的路径 variable.tfvars 文件中，我正在传递下面的输入。

rds_aurora = [
  {
    cluster_identifier               = "aurora-cluster-mysql-qa"
    cluster_instance_count           = 2
    engine                           = "aurora-mysql"
    engine_version                   = "5.7.mysql_aurora.2.07.1"
  },
  {
    cluster_identifier               = "aurora-cluster-mysql-dev"
    cluster_instance_count           = 1
    engine                           = "aurora-mysql"
    engine_version                   = "5.7.mysql_aurora.2.07.1"
  } 
}

Module.tf 文件

 resource "aws_rds_cluster_instance" "cluster_instances" {
  for_each                            = { for rds_aurora_instance in var.rds_aurora : "${rds_aurora_instance.cluster_identifier}-{cluster_instance_count}" => rds_aurora_instance }
  identifier                          = each.value.key
  cluster_identifier                  = each.value.cluster_identifier
  engine                              = each.value.engine
  engine_version                      = each.value.engine_version
}

我正在尝试以下面的形式转换变量，以便可以在模块中使用它。

aurora-cluster-mysql-qa-0  => {
    cluster_identifier               = "aurora-cluster-mysql-qa"
    cluster_instance_count           = 2
    engine                           = "aurora-mysql"
    engine_version                   = "5.7.mysql_aurora.2.07.1"
  }
aurora-cluster-mysql-qa-1  => {
    cluster_identifier               = "aurora-cluster-mysql-qa"
    cluster_instance_count           = 2
    engine                           = "aurora-mysql"
    engine_version                   = "5.7.mysql_aurora.2.07.1"
  }
 
aurora-cluster-mysql-dev-0 => {
    cluster_identifier               = "aurora-cluster-mysql-dev"
    cluster_instance_count           = 2
    engine                           = "aurora-mysql"
    engine_version                   = "5.7.mysql_aurora.2.07.1"
  }

以下表达式似乎无效。请帮忙。我只想在 modification/removing 任何块期间使用 for-each，我不会遇到可变块顺序问题。

 for_each                            = { for rds_aurora_instance in var.rds_aurora : "${rds_aurora_instance.cluster_identifier}-{cluster_instance_count}" => rds_aurora_instance }

Answer 1

这不是一个简单的转换，您的 rds_aurora 是一个对象数组，我们在该对象的一个属性中有一个计数，我们将需要一个中间变量来转换它这将需要几个循环...

这是我会做的：

provider "aws" {
  region = "us-east-2"
}

locals {
  rds_aurora = [
    {
      cluster_identifier     = "aurora-cluster-mysql-qa"
      cluster_instance_count = 2
      engine                 = "aurora-mysql"
      engine_version         = "5.7.mysql_aurora.2.07.1"
    },
    {
      cluster_identifier     = "aurora-cluster-mysql-dev"
      cluster_instance_count = 1
      engine                 = "aurora-mysql"
      engine_version         = "5.7.mysql_aurora.2.07.1"
    }
  ]

  data = { for i in flatten([
    for x in local.rds_aurora :
    [
      for y in range(x.cluster_instance_count) :
      {
        "id"                     = y
        "cluster_identifier"     = x.cluster_identifier
        "cluster_instance_count" = 2
        "engine"                 = x.engine
        "engine_version"         = x.engine_version
      }
    ]
    ]) : "${i.cluster_identifier}_${i.id}" => i
  }
}

output "new_data" {
  value = local.data
}

让我们分解那里发生的事情，我们有 3 个循环

for i in flatten([
这个我们把最终的对象放在一起
for x in local.rds_aurora
只是循环遍历 rds_aurora
for y in range(x.cluster_instance_count)
这是获取我们稍后将要获取的 id (0, 1) 的那个连接最终对象

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