Question

我正在尝试通过使用Terraform的 for_each 和 count 参数迭代字符串列表来创建GCP SQL数据库，而另一个循环用于映射键（ maindb 和副本）。

不幸的是，我得到了下面显示的错误。

是否有可能是Terraform？

variables.tf

variable "sql_var" {
    default = {
        "maindb" = {
            "db_list" = ["firstdb", "secondsdb", "thirddb"],
            "disk_size" = "20",
        },
        "replicadb" = {
            "db_list" = ["firstdb"],
            "disk_size" = "",
        }
    }
}

main.tf

resource "google_sql_database_instance" "master_sql_instance" {
...
}

resource "google_sql_database" "database" {
  for_each = var.sql_var
  name =  "${element(each.value.db_list, count.index)}"
  instance = "${google_sql_database_instance.master_sql_instance[each.key].name}"

  count =  "${length(each.value.db_list)}"
}

错误消息

错误：“ count”和“ for_each”的无效组合
../main.tf第43行中的
“ google_sql_database”“数据库”：43：for_each = var.sql_var

“ count”和“ for_each”元参数是互斥的，仅应该明确说明要使用的资源数量已创建。

Answer 1

错误消息告诉您，您不能同时使用count和for_each。看来您正在尝试创建3个主数据库和1个副本数据库，对吗？我要做的是创建2个主实例，然后转换map变量以创建数据库。

terraform {
  required_version = ">=0.13.3"

  required_providers {
    google = ">=3.36.0"
  }
}

variable "sql_instances" {
  default = {
    "main_instance" = {
      "db_list"   = ["first_db", "second_db", "third_db"],
      "disk_size" = "20",
    },
    "replica_instance" = {
      "db_list"   = ["first_db"],
      "disk_size" = "20",
    }
  }
}

locals {
  databases = flatten([
    for key, value in var.sql_instances : [
      for item in value.db_list : {
        name     = item
        instance = key
      }
    ]
  ])
  sql_databases = {
    for item in local.databases :
    uuid() => item
  }
}

resource "google_sql_database_instance" "sql_instance" {
  for_each = var.sql_instances
  name     = each.key

  settings {
    disk_size = each.value.disk_size
    tier      = "db-f1-micro"
  }
}

resource "google_sql_database" "sql_database" {
  for_each = local.sql_databases
  name     = each.value.name
  instance = each.value.instance

  depends_on = [
    google_sql_database_instance.sql_instance,
  ]
}

然后，首先运行terraform apply -target=google_sql_database_instance.sql_instance，然后再运行terraform apply。

for_each循环中的地形计数

1 个答案: