使用来自 for_each 资源块的资源 ID

Question

我创建了一个 Terraform 模板，该模板使用for_each命令创建了 2 个路由表和 2 个子网。 我正在尝试将路由表关联到两个子网，但是我很难做到这一点，因为我不知道如何获取路由表和子网的 ID，因为详细信息不在变量中，而且我不知道如何获取该信息并使用它。 请问有人可以提供帮助吗？

谢谢

主模板

# SUBNETS DEPLOYMENT
resource "azurerm_subnet" "subnets" {
  depends_on           = [azurerm_virtual_network.vnet]
  for_each             = var.subnets
  resource_group_name  = var.rg.name
  virtual_network_name = var.vnet.config.name
  name                 = each.value.subnet_name
  address_prefixes     = each.value.address_prefixes
}

# ROUTE TABLE DEPLOYMENT
resource "azurerm_route_table" "rt" {
  depends_on = [azurerm_virtual_network.vnet]
  for_each = var.rt
  name = each.value.route_table_name
  resource_group_name = var.rg.name
  location = var.rg.location
  disable_bgp_route_propagation = true
  route = [ {
    address_prefix = each.value.address_prefix
    name = each.value.route_name
    next_hop_in_ip_address = each.value.next_hop_ip
    next_hop_type = each.value.next_hop_type
  } ]
}

# ROUTE TABLE ASSOICATION
resource "azurerm_subnet_route_table_association" "rt_assoication" {
  subnet_id = azurerm_subnet.subnets.id
  route_table_id = azurerm_route_table.rt.id
}

变量

# SUBNET VARIBALES
variable "subnets" {
  description = "subnet names and address prefixes"
  type = map(any)
  default = {
    subnet1 = {
      subnet_name      = "snet-001"
      address_prefixes = ["172.17.208.0/28"]
    }
    subnet2 = {
      subnet_name      = "snet-002"
      address_prefixes = ["172.17.208.32/27"]
    }
  }
}

# ROUTE TABLES VARIABLES
variable "rt" {
  description = "variable for route tables."
  type = map(any)
  default = {
    rt1 = {
      route_table_name = "rt1"
      address_prefix = "0.0.0.0/0"
      route_name = "udr-azure-firewall"
      next_hop_ip = "10.0.0.0"
      next_hop_type = "VirtualAppliance" 
    }
    rt2 = {
      route_table_name = "rt2"
      address_prefix = "0.0.0.0/0"
      route_name = "udr-azure-firewall"
      next_hop_ip = "10.0.0.0"
      next_hop_type = "VirtualAppliance" 
    }
  }
}

运行 terraform 计划时出现的错误是：

│ Error: Missing resource instance key
│ 
│   on modules\vnet\main.tf line 74, in resource "azurerm_subnet_route_table_association" "rt_assoication":
│   74:   subnet_id = azurerm_subnet.subnets.id
│ 
│ Because azurerm_subnet.subnets has "for_each" set, its attributes must be accessed on specific instances.
│ 
│ For example, to correlate with indices of a referring resource, use:
│     azurerm_subnet.subnets[each.key]
╵
╷
│ Error: Missing resource instance key
│ 
│   on modules\vnet\main.tf line 75, in resource "azurerm_subnet_route_table_association" "rt_assoication":
│   75:   route_table_id = azurerm_route_table.rt.id
│ 
│ Because azurerm_route_table.rt has "for_each" set, its attributes must be accessed on specific instances.
│ 
│ For example, to correlate with indices of a referring resource, use:
│     azurerm_route_table.rt[each.key]

Answer 1

看起来你快到了，在子网路由表关联块中更新以下内容，它应该可以工作：

# ROUTE TABLE ASSOICATION
resource "azurerm_subnet_route_table_association" "rt_assoication" {
  subnet_id = azurerm_subnet.subnets[each.key].id
  route_table_id = azurerm_route_table.rt[each.key].id
}