尝试在 terraform 中的块上使用 terraform if/else 语句

Question

我是 terraform 的新手，坚持做一些我认为可以做但不知道的事情。我想看看是否有一种方法可以使天蓝色子网中的委派块从 if/else 中可选。我尝试使用变量来完成此操作，但不断出现错误。

#variable: 

variable "resource_group_name" {
  type        = string
  description = "name of rg v-net is located"
}

variable "subnet_name" {
  type        = string
  description = "name of subnet"
}

variable "subnet_address_prefixes" {
  type        = list(string)
  description = "address space of subnet"
}

variable "service_endpoints" {
  type        = list(string)
  default     = null
  description = "Service enpoints connected to subnet or vm"

}

variable "vnet_name" {
  type        = string
  description = "name of vnet"
}

variable "delegation_name" {
  type    = string
  default = ""
}
variable "service_delegation" {
  type = object({
    name   =  string
    action =  list(string)

  })
  default = {
    name   = "Microsoft.DBforMySQL/flexibleServers"
    action = []
  }
}
#module 

resource "azurerm_subnet" "panynj_subnet" {
  name                 = var.subnet_name
  resource_group_name  = var.resource_group_name
  virtual_network_name = var.vnet_name
  address_prefixes     = var.subnet_address_prefixes
  service_endpoints    = var.service_endpoints
    delegation {
    name = var.delegation

    service_delegation {
      name    = var.service_delegation.name
      actions = var.service_delegation.action
    }
}

我尝试将 if else 语句应用于变量，但这似乎不起作用，而且我不知道是否可以在动态块中完成。

Answer 1

通常，动态块与运行 0 或 1 次的

for_each

一起用作 if/else。

https://developer.hashicorp.com/terraform/language/expressions/dynamic-blocks

假设只有当

var.delegation_name

不为空时才应添加“委托”。

  # your code here

  dynamic "delegation" {
    for_each = var.delegation_name != "" ? [1] : []
    content {
      name = var.delegation_name

      service_delegation {
        name    = var.service_delegation.name
        actions = var.service_delegation.action
      }
    }
  }


  [1]: https://developer.hashicorp.com/terraform/language/expressions/dynamic-blocks