将VM Scale Set附加到Application Gateway的后端池

Question

谁能提供一个示例，说明如何使用Terraform将Azure VM规模集（VMSS）添加到应用程序网关的后端池。

我只能找到one example，无法为我工作。尽管terraform plan和terraform apply不会出错，但VMSS不会添加到后端池中。我想知道我的问题是否是由应用程序网关资源的backend_address_pool输出是一个块而不是单个属性引起的。

我正在使用带有AzureRM提供程序1.31.0的Terraform 0.12.5。

App Gateway资源输出：

output "name" {
  value = azurerm_application_gateway.pool[*].name
}

output "id" {
  value = azurerm_application_gateway.pool[*].id
}

output "backend_address_pool" {
  value = azurerm_application_gateway.pool[*].backend_address_pool
}

VMSS模块声明：

module "vmss_example" {
...
application_gateway_backend_address_pool_ids = ["${module.app_gateway_example[0].id}/backendAddressPools/my-backend-address-pool"]
}

---

创建资源后，重新运行terraform plan希望将vmss从以下位置更改：

...
- ip_configuration {
              - application_gateway_backend_address_pool_ids = [] -> null
              - application_security_group_ids               = [] -> null
              - load_balancer_backend_address_pool_ids       = [] -> null
              - load_balancer_inbound_nat_rules_ids          = [] -> null
              - name                                         = "ipconfig" -> null
              - primary                                      = true -> null
              - subnet_id                                    = "/subscriptions/#########-####-####-####-############/resourceGroups/demo-modules-rg/providers/Microsoft.Network/virtualNetworks/vnetdemodemo01/subnets/subnetdemovm01" -> null
            }
...

收件人：

...
+ ip_configuration {
              + application_gateway_backend_address_pool_ids = (known after apply)
              + application_security_group_ids               = []
              + load_balancer_backend_address_pool_ids       = []
              + load_balancer_inbound_nat_rules_ids          = (known after apply)
              + name                                         = "ipconfig"
              + primary                                      = true
              + subnet_id                                    = "/subscriptions/#########-####-####-####-############/resourceGroups/demo-modules-rg/providers/Microsoft.Network/virtualNetworks/vnetdemodemo01/subnets/subnetdemovm01"
            }
...

我认为这意味着它正在尝试更新application_gateway_backend_address_pool_ids。

任何帮助，指示或建议将不胜感激。 TIA

Answer 1

是的，您只需要使用application_gateway_backend_address_pool_ids在ip_configuration块中指定对应用程序网关的后端地址池的引用数组。

例如，这在Terraform v0.12.5上对我有效 + provider.azurerm v1.32.0：

ip_configuration {
  name                                   = "TestIPConfiguration"
  primary                                = true
  subnet_id                              = "${azurerm_subnet.backend.id}"
  application_gateway_backend_address_pool_ids = "${azurerm_application_gateway.network.backend_address_pool[*].id}"
}

或者，这也可以application_gateway_backend_address_pool_ids = ["${azurerm_application_gateway.network.backend_address_pool[0].id}"]

检查输出

output "backend_address_pool" {
    value = "${azurerm_application_gateway.network.backend_address_pool[*].id}"
}