如果创建了虚拟机，如何使用terraform在inventory.ini.tmpl中写入虚拟机的名称和ip？

虚拟机是使用terraform版本13.5创建的

虚拟机有变量名_b（我很感兴趣）

创建虚拟机的主代码

resource "vcd_vapp_vm" "b" {
  count         = var.create_b == "true" ? 1 : 0
  name          = "b"
}

如果我不想创建虚拟机：

create_b = "false"

如果创建了虚拟机，则必须将其名称记录在inventory.ini中

resource "local_file" "AnsibleInventory" {
 content = templatefile("inventory.ini.tmpl",
 {
  name_b                = vcd_vapp_vm.b.name,
 }
 )
 filename = "inventory.ini"
}

如何避免错误

Error: Missing resource instance key

  on outputs.tf line 12, in resource "local_file" "AnsibleInventory":
  13:   name_b      = vcd_vapp_vm.b.name,

Because vcd_vapp_vm.b has "count" set, its attributes must be accessed
on specific instances.

For example, to correlate with indices of a referring resource, use:
    vcd_vapp_vm.b[count.index]

我尝试将[count.index]添加到资源中

resource "local_file" "AnsibleInventory" {
 content = templatefile("inventory.ini.tmpl",
 {
  name_b                = vcd_vapp_vm.b[count.index].name,
  
 }
 )
 filename = "inventory.ini"
}

错误：

Error: Reference to "count" in non-counted context

  on outputs.tf line 12, in resource "local_file" "AnsibleInventory":
  13:   name_b                = vcd_vapp_vm.b[count.index].name,

The "count" object can only be used in "module", "resource", and "data"
blocks, and only when the "count" argument is set.

我尝试添加check特殊变量

resource "local_file" "AnsibleInventory" {
 content = templatefile("inventory.ini.tmpl",
 {
  name_b                = var.create_b ? vcd_vapp_vm.b.name : null,
  
 }
 )
 filename = "inventory.ini"
}

错误

试一试

错误

---

Terraform不会以本机方式输出到文件

看

---

你想完成什么？为什么要将这些变量值写入文件？

谢谢您的回答！尝试在问题中添加示例。

  on outputs.tf line 12, in resource "local_file" "AnsibleInventory":

  13:   name_b                = var.create_b ? vcd_vapp_vm.b.name : null,

Because vcd_vapp_vm.b has "count" set, its attributes must be accessed
on specific instances.

For example, to correlate with indices of a referring resource, use:
    vcd_vapp_vm.b[count.index]

resource "local_file" "AnsibleInventory" {
 content = templatefile("inventory.ini.tmpl",
 {
  name_b = try(vcd_vapp_vm.b.name, null)
 }
 )
 filename = "inventory.ini"
}

Error: Missing resource instance key

  on outputs.tf line 12, in resource "local_file" "AnsibleInventory":
  13:   name_b = try(vcd_vapp_vm.b.name, null)

Because vcd_vapp_vm.b has "count" set, its attributes must be accessed
on specific instances.

For example, to correlate with indices of a referring resource, use:
    vcd_vapp_vm.b[count.index]