azure - 在 Terraform 中使用共享磁盘的代码使用 "for_each"

Question

我已经使用 Terraform 代码创建并使用了 Azure 的托管磁盘，如下所示。但是，此代码的致命缺点是它会创建与虚拟机数量一样多的托管磁盘。

我想按如下方式实现它。

1. I want to create "localdisk" as many as the number of VMs, that is, if there are two VMs, I want to create one each.(The code I have now is implemented like this)

2. For "data-disk", I want to share 1 "data-disk" in 2 VMs and use it.

目前，我的 terraform 代码如下。

• 管理磁盘.tf

locals {
  disk_vm_flat = merge([
    for vm, vm_vals in var.vm_template : {
      for disk, disk_vals in var.disk_template :
      "${vm_vals.vm_name}-${disk_vals.managed_disk_name}" => {
        vm      = vm
        vm_name = vm_vals.vm_name
        managed_disk_name    = disk_vals.managed_disk_name
        managed_disk_size    = disk_vals.managed_disk_size
        managed_disk_lun     = disk_vals.managed_disk_lun
        managed_disk_type    = disk_vals.managed_disk_type
        managed_disk_caching = disk_vals.managed_disk_caching
        os_type              = disk_vals.os_type
        create_option        = disk_vals.create_option
        max_shares           = disk_vals.max_shares
      } if disk_vals.managed_disk_size != "0"
    }
  ]...)
}

resource "azurerm_managed_disk" "managed_disk" {
  for_each = local.disk_vm_flat
  name     = "${each.value.vm_name}-${each.value.managed_disk_name}"
  location             = var.location
  resource_group_name  = data.azurerm_resource_group.system_rg_name.name
  storage_account_type = each.value.managed_disk_type
  create_option        = each.value.create_option
  max_shares           = each.value.max_shares
  os_type              = each.value.os_type
  disk_size_gb         = each.value.managed_disk_size

}

resource "azurerm_virtual_machine_data_disk_attachment" "disk_attach" {
  for_each = local.disk_vm_flat
  managed_disk_id = azurerm_managed_disk.managed_disk[each.key].id
  lun             = each.value.managed_disk_lun
  caching         = each.value.managed_disk_caching
  virtual_machine_id = azurerm_windows_virtual_machine.vm[each.value.vm].id
}

• var.tf

variable "vm_template" {
  type = map(any)
  default = {
    vm2 = {
      vm_name      = "test02"
      hostname     = "test02"
      os_publisher = "MicrosoftWindowsServer"
      os_offer     = "WindowsServer"
      os_sku       = "2022-datacenter-azure-edition"
      license_type = "Windows_Server"
      os_version   = "latest"
      osdisk_type  = "StandardSSD_LRS"
      osdisk_size  = "128"
      vm_type      = "Standard_D4s_v5"
      nic          = "nic01"
      os_disk      = "osdisk01"
    }
    vm3 = {
    vm_name      = "test03"
    hostname     = "test03"
    os_publisher = "MicrosoftWindowsServer"
    os_offer     = "WindowsServer"
    os_sku       = "2022-datacenter-azure-edition"
    license_type = "Windows_Server"
    os_version   = "latest"
    osdisk_type  = "StandardSSD_LRS"
    osdisk_size  = "128"
    nic          = "nic01"
    os_disk      = "osdisk01"
    }
  }
}
variable "disk_template" {
  type = map(any)
  default = {
    disk1 = {
      managed_disk_name    = "localdisk"
      managed_disk_type    = "StandardSSD_LRS"
      managed_disk_size    = "10"
      managed_disk_lun     = "1"
      managed_disk_caching = "ReadWrite"
      create_option        = "Empty"
      os_type              = "Windows"
      max_shares           = "1"
    }
    disk2 = {
      managed_disk_name    = "data-disk"
      managed_disk_type    = "StandardSSD_LRS"
      managed_disk_size    = "10"
      managed_disk_lun     = "2"
      managed_disk_caching = "ReadWrite"
      create_option        = "Empty"
      os_type              = "Windows"
      max_shares           = "2"
    }
  }
}

有人可以帮忙吗？

Answer 1

问题源于您将 localdisk 和 data-disk 混合在一个变量 var.disk_template 中。尽管您可以为此破解 TF 代码，但它会过于复杂和困惑。

因此，在我看来，最好的方法是为数据磁盘提供一个单独变量以及关联的单独资源。我假设您只有一个共享驱动器，正如您的图表所示。例如(代码可能需要一些调整才能正常工作，但它显示了新设计背后的总体思想):

variable "disk_template" {
  type = map(any)
  default = {
    disk2 = {
      managed_disk_name    = "data-disk"
      managed_disk_type    = "StandardSSD_LRS"
      managed_disk_size    = "10"
      managed_disk_lun     = "2"
      managed_disk_caching = "ReadWrite"
      create_option        = "Empty"
      os_type              = "Windows"
      max_shares           = "2"
    }
  }
}

variable "disk_template_shared" {
  type = map(any)
  default = {
    data-disk1 = {
      managed_disk_name    = "data-disk"
      managed_disk_type    = "StandardSSD_LRS"
      managed_disk_size    = "10"
      managed_disk_lun     = "2"
      managed_disk_caching = "ReadWrite"
      create_option        = "Empty"
      os_type              = "Windows"
      max_shares           = "2"
    }
  }
}

然后

resource "azurerm_managed_disk" "managed_disk" {
  for_each = local.disk_vm_flat
  name     = "${each.value.vm_name}-${each.value.managed_disk_name}"
  location             = var.location
  resource_group_name  = data.azurerm_resource_group.system_rg_name.name
  storage_account_type = each.value.managed_disk_type
  create_option        = each.value.create_option
  max_shares           = each.value.max_shares
  os_type              = each.value.os_type
  disk_size_gb         = each.value.managed_disk_size
}

resource "azurerm_managed_disk" "managed_disk_shared" {
  for_each = var.disk_template_shared
  name     = "${each.value.managed_disk_name}"
  location             = var.location
  resource_group_name  = data.azurerm_resource_group.system_rg_name.name
  storage_account_type = each.value.managed_disk_type
  create_option        = each.value.create_option
  max_shares           = each.value.max_shares
  os_type              = each.value.os_type
  disk_size_gb         = each.value.managed_disk_size
}

及附件:

resource "azurerm_virtual_machine_data_disk_attachment" "disk_attach" {
  for_each = local.disk_vm_flat
  managed_disk_id = azurerm_managed_disk.managed_disk[each.key].id
  lun             = each.value.managed_disk_lun
  caching         = each.value.managed_disk_caching
  virtual_machine_id = azurerm_windows_virtual_machine.vm[each.value.vm].id
}

resource "azurerm_virtual_machine_data_disk_attachment" "disk_attach_shared" {
  for_each = var.vm_template
  managed_disk_id = azurerm_managed_disk.managed_disk_shared["data-disk1"].id
  lun             = each.value.managed_disk_lun
  caching         = each.value.managed_disk_caching
  virtual_machine_id = azurerm_windows_virtual_machine.vm[each.value.vm].id
}