使用for_each的多個aws_rds_cluster_instance

我想創建一個模塊

在我的路由 variable.tfvars 檔案中，我在輸入下方傳遞。

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"
  } 
}

模塊.tf檔案

 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
}

我正在嘗試以下面的形式轉換變數，以便可以在模塊中使用它。

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"
  }

下面的運算式似乎不起作用。請幫忙。我只想使用 for-each 所以在修改/洗掉任何塊期間，我不會遇到可變塊順序問題。

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

uj5u.com熱心網友回復：

這不是一個簡單的轉換，你rds_aurora是一個物件陣列，我們在該物件的一個??屬性中進行計數，我們將需要一個中間變數來轉換它，這將需要一些回圈......

這是我會做的：

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
}

讓我們分解一下發生的事情，我們有 3 個回圈

• for i in flatten([
  這個我們把最終的物件放在一起
• for x in local.rds_aurora
  只是對 rds_aurora 中的元素進行回圈
• for y in range(x.cluster_instance_count)
  這是獲取 id (0, 1) 的那個，我們稍后將連接到最終物件

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