如何将随机subnet_id分配到azurerm_network_interface中？

Question

### variable
variable "vm-subnets" { 
  type = list(string) 
  default = ["7.0.1.0/24","7.0.2.0/24","7.0.3.0/24"] 
}

### subnet
resource "azurerm_subnet" "task_subnet" {
  name                 = "subnet-${format("%02d",count.index)}"
  resource_group_name  = azurerm_resource_group.task.name
  virtual_network_name = azurerm_virtual_network.task_vnet.name
  network_security_group_id = azurerm_network_security_group.task_nsg.id
  address_prefix       = var.vm-subnets[count.index]
  count                 = length(var.vm-subnets)
}

### NIC
resource "azurerm_network_interface" "vm_nic" {
  name                = "nic--${format("%02d",count.index)}"
  location            = var.region
  resource_group_name = azurerm_resource_group.task.name
  count               = var.vm-count

  ip_configuration {
    name                          = "${var.resource_prefix}-${format("%02d",count.index)}-ip"
    subnet_id                     = azurerm_subnet.task_subnet.*.id[count.index]
    private_ip_address_allocation = "dynamic"
    public_ip_address_id          = azurerm_public_ip.task_public_ip.*.id[count.index]
  }<br>
}

对于类似的子网-A=2 3VMs，子网-B=2 3VMs，子网-C=3 3VMs或随机错误:错误:无效索引，我需要将VM分为3个子网。

在vm-network.tf第11行中，在资源"azurerm_network_interface“”vm_nic“中: 11: subnet_id = azurerm_subnet.task_subnet.*.idcount.index x

给定的键不标识此集合值中的元素。

错误:无效索引

在vm-network.tf第11行中，在资源"azurerm_network_interface“”vm_nic“中: 11: subnet_id = azurerm_subnet.task_subnet.*.idcount.index x

The given key does not identify an element in this collection value.



What modification can be done to resolve it and how can I assign different/random subnet on each vm rather then count loop.

I also try to do it using random_shuffle and set-product function but not get the desired output .. please Help 

Answer 1

经过两天的逻辑斗争，我终于找到了一个解决方案或我创建的问题:使用元素函数https://www.terraform.io/docs/configuration/functions/element.html

NIC

resource "azurerm_network_interface" "vm_nic" {
  name                = "nic--${format("%02d",count.index)}"
  location            = var.region
  resource_group_name = azurerm_resource_group.task.name
  count               = var.vm-count
  ip_configuration {
    name                          = "${var.resource_prefix}-${format("%02d",count.index)}-ip"
    subnet_id                     =  element(azurerm_subnet.task_subnet.*.id, count.index)
    private_ip_address_allocation = "dynamic"
    public_ip_address_id          = azurerm_public_ip.task_public_ip.*.id[count.index]
  }
} 

subnet_id =元素(azurerm_subnet.task_subnet.*.id，count.index)

在vm count.index =3时，使用元素函数"7.0.1.0/24“、"7.0.2.0/24”、"7.0.3.0/24“，返回到子网索引=0，以便在vm.count = 5、7、10.✌下如何工作和测试。