Update azurerm_linux|windows_virtual_machine and azurerm_linux|windows_virtual_machine_scale_set - Support managed boot diagnostics

[ArcturusZhang]

Fixes #8319

Since add a new required attribute in the existing boot_diagnostics block should be considered as a breaking change, I just implement this feature like this.
Please let me know if we could accept the other way.

Update:
I have thought of two approaches of fixing this issue, one of them is the way implemented in this PR. The other is this:

boot_diagnostics {
  enabled = true    # required (breaking change)
  storage_account_uri = "uri of the storage account" # optional
}

which would introduce a breaking change (we add a required attribute). I am not quite sure whether this is allowed. But I personally prefer this way rather than the implementation in this PR, which is more elegant and aligned with the API.

[wagnst]

Any update on this one?

[katbyte]

Hey @ArcturusZhang,

I think what we could do is mark the boot_diagnostic.storage_account property as optional and computed, and then if the block is present but the storagr account missing switch it to "managed" rather then create a new "false" boolean flag? WDYT?

[ArcturusZhang]

Hi @katbyte thanks for the review! I would love to do that but I am afraid in some circumstances it may not work.
First I need to clarify we are talking about changing the schema into the following, right?

boot_diagnostics { # the presence of this block implies enabled = true
  storage_account_uri = "uri of the storage account" # optional and computed
}

in this way, the managed boot diagnostics usage should be this:

boot_diagnostics {}

and unmanaged should be

boot_diagnostics {
  storage_account_uri = "something"
}

But in this way we cannot change from a unmanaged boot diagnostics to managed - since the storage_account_uri is computed and it already has a value, erasing it like the above or explicitly assigning it to empty string would not be counted as a diff, and therefore no change will be made.
This is also the reason that I suppose we have to introduce a new enabled flag of this.

And also we cannot make the enabled as optional - diff will come up when the user is not assigning it explicitly but implying it by the presence of the block

[ArcturusZhang]

Hi @katbyte actually it works. We could use

boot_diagnostics {}

for managed boot diagnostics and

boot_diagnostics {
  storage_account_uri = "something"
}

for unmanaged. Thanks to the Azure compute team they do not return a value in storage_account_uri when we are using the unmanaged boot diagnostics. Please have a look again.

[katbyte]

Hey @ArcturusZhang, tests are failing:

TestAccAzureRMWindowsVirtualMachineScaleSet_otherBootDiagnosticsMananged: testing.go:684: Step 0 error: After applying this step, the plan was not empty:
        
        DIFF:
        
        UPDATE: azurerm_windows_virtual_machine_scale_set.test
          additional_capabilities.#:                                                             "0" => "0"
          additional_unattend_content.#:                                                         "0" => "0"
          admin_password:                                                                        "P@ssword1234!" => "P@ssword1234!"
          admin_username:                                                                        "adminuser" => "adminuser"
          automatic_instance_repair.#:                                                           "1" => "1"
          automatic_instance_repair.0.enabled:                                                   "false" => "false"
          automatic_instance_repair.0.grace_period:                                              "PT30M" => "PT30M"
          automatic_os_upgrade_policy.#:                                                         "0" => "0"
          boot_diagnostics.#:                                                                    "0" => "1"
          computer_name_prefix:                                                                  "acctvm20" => "acctvm20"
          data_disk.#:                                                                           "0" => "0"
          do_not_run_extensions_on_overprovisioned_machines:                                     "false" => "false"
          enable_automatic_updates:                                                              "true" => "true"
          encryption_at_host_enabled:                                                            "false" => "false"
          eviction_policy:                                                                       "" => ""
          extension.#:                                                                           "0" => "0"
          health_probe_id:                                                                       "" => ""
          id:                                                                                    "/subscriptions/*******/resourceGroups/acctestRG-201103185031503663/providers/Microsoft.Compute/virtualMachineScaleSets/acctvm20" => "/subscriptions/*******/resourceGroups/acctestRG-201103185031503663/providers/Microsoft.Compute/virtualMachineScaleSets/acctvm20"
          identity.#:                                                                            "0" => "0"
          instances:                                                                             "1" => "1"
          license_type:                                                                          "" => ""
          location:                                                                              "westeurope" => "westeurope"
          max_bid_price:                                                                         "-1" => "-1"
          name:                                                                                  "acctvm20" => "acctvm20"
          network_interface.#:                                                                   "1" => "1"
          network_interface.0.dns_servers.#:                                                     "" => "0"
          network_interface.0.enable_accelerated_networking:                                     "false" => "false"
          network_interface.0.enable_ip_forwarding:                                              "false" => "false"
          network_interface.0.ip_configuration.#:                                                "1" => "1"
          network_interface.0.ip_configuration.0.application_gateway_backend_address_pool_ids.#: "" => "0"
          network_interface.0.ip_configuration.0.application_security_group_ids.#:               "" => "0"
          network_interface.0.ip_configuration.0.load_balancer_backend_address_pool_ids.#:       "" => "0"
          network_interface.0.ip_configuration.0.load_balancer_inbound_nat_rules_ids.#:          "" => "0"
          network_interface.0.ip_configuration.0.name:                                           "internal" => "internal"
          network_interface.0.ip_configuration.0.primary:                                        "true" => "true"
          network_interface.0.ip_configuration.0.public_ip_address.#:                            "0" => "0"
          network_interface.0.ip_configuration.0.subnet_id:                                      "/subscriptions/*******/resourceGroups/acctestRG-201103185031503663/providers/Microsoft.Network/virtualNetworks/acctestnw-201103185031503663/subnets/internal" => "/subscriptions/*******/resourceGroups/acctestRG-201103185031503663/providers/Microsoft.Network/virtualNetworks/acctestnw-201103185031503663/subnets/internal"
          network_interface.0.ip_configuration.0.version:                                        "IPv4" => "IPv4"
          network_interface.0.name:                                                              "example" => "example"
          network_interface.0.network_security_group_id:                                         "" => ""
          network_interface.0.primary:                                                           "true" => "true"
          os_disk.#:                                                                             "1" => "1"
          os_disk.0.caching:                                                                     "ReadWrite" => "ReadWrite"
          os_disk.0.diff_disk_settings.#:                                                        "0" => "0"
          os_disk.0.disk_encryption_set_id:                                                      "" => ""
          os_disk.0.disk_size_gb:                                                                "127" => "127"
          os_disk.0.storage_account_type:                                                        "Standard_LRS" => "Standard_LRS"
          os_disk.0.write_accelerator_enabled:                                                   "false" => "false"
          overprovision:                                                                         "true" => "true"
          plan.#:                                                                                "0" => "0"
          priority:                                                                              "Regular" => "Regular"
          provision_vm_agent:                                                                    "true" => "true"
          proximity_placement_group_id:                                                          "" => ""
          resource_group_name:                                                                   "acctestRG-201103185031503663" => "acctestRG-201103185031503663"
          rolling_upgrade_policy.#:                                                              "0" => "0"
          scale_in_policy:                                                                       "Default" => "Default"
          secret.#:                                                                              "0" => "0"
          single_placement_group:                                                                "true" => "true"
          sku:                                                                                   "Standard_F2" => "Standard_F2"
          source_image_id:                                                                       "" => ""
          source_image_reference.#:                                                              "1" => "1"
          source_image_reference.0.offer:                                                        "WindowsServer" => "WindowsServer"
          source_image_reference.0.publisher:                                                    "MicrosoftWindowsServer" => "MicrosoftWindowsServer"
          source_image_reference.0.sku:                                                          "2019-Datacenter" => "2019-Datacenter"
          source_image_reference.0.version:                                                      "latest" => "latest"
          terminate_notification.#:                                                              "0" => "0"
          timezone:                                                                              "" => ""
          unique_id:                                                                             "d492158d-93c9-4e98-96e8-35eabaaf7695" => "d492158d-93c9-4e98-96e8-35eabaaf7695"
          upgrade_mode:                                                                          "Manual" => "Manual"
          winrm_listener.#:                                                                      "0" => "0"
          zone_balance:   

[ArcturusZhang]

Hi @katbyte sorry for not fully tested... Now I have fixed the test, please have a look again, thanks.

[katbyte]

Thanks @ArcturusZhang - LGTM 👍

[ghost]

This has been released in version 2.36.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 2.36.0"
}
# ... other configuration ...

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 hashibot-feedback@hashicorp.com. Thanks!