Error on changing app service plan

[Leon99]

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Terraform (and AzureRM Provider) Version

Terraform v0.11.13
+ provider.azurerm v1.24.0

Affected Resource(s)

• azurerm_app_service

Expected Behavior

Resource re-created on changing app service plan as it used to happen before v1.24.0

Actual Behavior

azurerm_app_service.appservice: web.AppsClient#CreateOrUpdate: Failure sending request: StatusCode=0 -- Original Error: autorest/azure: Service returned an error. Status=<nil> <nil>

Steps to Reproduce

1. Change app_service_plan_id
2. terraform apply

Important Factoids

Not sure if it matters but I'm changing from a Windows plan to a Linux one

[Lucretius]

Hi @Leon99 - it looks like in the last release #3048 changed this part of the code to stop forcing a new resource to support migrating between plans. Maybe @tombuildsstuff can shed some light on this particular change? It seems like only "some" apps can be migrated while some need a full create/destroy cycle?

[Leon99]

@tombuildsstuff I wonder if #3048 could be reverted for now, if fixing it is too hard? We're gradually migrating our services to Linux plans and this bug stops us from upgrading the provider, however, there are fixes in the newer versions that we need.

[tombuildsstuff]

@Leon99 I don't believe reverting #3048 is the right approach here, unfortunately, since that'd break that use-case too. Out of interest does using terraform taint work as a workaround in the interim?

Thanks!

[Leon99]

taint helps, thanks.

[Stolpe]

According to https://social.msdn.microsoft.com/Forums/en-US/6d59602e-b67e-4e33-a2b8-fd15b2e111fd/unable-to-quotchange-app-service-planquot-as-no-app-service-plans-are-listed, app service plans can only be changed within the same webspace. Maybe this is something that could be used to determine if an app_service resource can be updated in-place, or if a destroy-and-recreate is needed.

[tombuildsstuff]

Closing this in favour of #6348 which'll highlight the error here

[ghost]

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