Terraform动态块配置Azure应用网关报错求助

你的问题出在dynamic块内的元素引用方式错误。Terraform的dynamic块中，迭代元素的引用需要使用dynamic块的名称（默认迭代器），而非原变量名。

核心错误点 #

在你的backend_address_pool dynamic块中，你用了agw_configs.value来访问元素属性，但正确的引用应该是backend_address_pool.value——因为dynamic块的名称就是默认的迭代器变量名。

修正后的代码 #

resource "azurerm_application_gateway" "application_gateway" {
  name                = local.application_gateway_name
  resource_group_name = var.resource_group_name
  location            = var.location

  sku {
    name     = var.sku.size
    tier     = var.sku.tier
    capacity = var.sku.capacity
  }

  # 其他配置...

  dynamic "backend_address_pool" {
    for_each = local.agw_configs
    content {
      name  = "${var.region}-${backend_address_pool.value.env}-${backend_address_pool.value.function}-beap"
      fqdns = [backend_address_pool.value.backend_pool_fqdn]
    }
  }
}

额外注意事项 #

• 确认local变量定义：确保agw_configs确实在locals块中正确定义，而非仅作为普通变量：

locals {
  agw_configs = [
    {
      env                     = "dev"
      function                = "events"
      backend_pool_fqdn       = "dev.servicebus.windows.net"
      cookie_based_affinity   = "Enabled"
      https_listener_hostname = "ingestiondev.co.uk"
    },
    {
      env                     = "test"
      function                = "events"
      backend_pool_fqdn       = "test.servicebus.windows.net"
      cookie_based_affinity   = "Enabled"
      https_listener_hostname = "ingestiontest.co.uk"
    }
  ]
}

• 自定义迭代器（可选）：如果想让代码更清晰，可以给dynamic块指定自定义迭代器名称：

dynamic "backend_address_pool" {
    for_each = local.agw_configs
    iterator = config  # 自定义迭代器名
    content {
      name  = "${var.region}-${config.value.env}-${config.value.function}-beap"
      fqdns = [config.value.backend_pool_fqdn]
    }
  }

内容的提问来源于stack exchange，提问作者lordy10101