Traffic Manager API Version in SDK isn't available

[tombuildsstuff]

👋

I've spent the last couple of days trying to migrate us over to using v11 of the SDK - and have run into what I believe is a blocker with the Traffic Manager SDK. v11 switches over to using API version 2017-09-01-preview (from 2015-11-01) - which it appears isn't actually available in Azure yet:

trafficmanager.ProfilesClient#CreateOrUpdate: Failure responding to request: StatusCode=400 -- Original Error: autorest/azure: Service returned an error. Status=400 Code="NoRegisteredProviderFound" Message="No registered resource provider found for location 'global' and API version '2017-09-01-preview' for type 'trafficmanagerprofiles'. The supported api-versions are '2015-04-28-preview, 2015-11-01, 2017-03-01, 2017-05-01'. The supported locations are ', global'."

This means our acceptance tests are failing:

$ acctests azurerm TestAccAzureRMTrafficManagerProfile_priority
=== RUN   TestAccAzureRMTrafficManagerProfile_priority
--- FAIL: TestAccAzureRMTrafficManagerProfile_priority (53.12s)
	testing.go:459: Step 0 error: Error applying: 1 error(s) occurred:

		* azurerm_traffic_manager_profile.test: 1 error(s) occurred:

		* azurerm_traffic_manager_profile.test: trafficmanager.ProfilesClient#CreateOrUpdate: Failure responding to request: StatusCode=400 -- Original Error: autorest/azure: Service returned an error. Status=400 Code="NoRegisteredProviderFound" Message="No registered resource provider found for location 'global' and API version '2017-09-01-preview' for type 'trafficmanagerprofiles'. The supported api-versions are '2015-04-28-preview, 2015-11-01, 2017-03-01, 2017-05-01'. The supported locations are ', global'."
FAIL
exit status 1
FAIL	github.com/terraform-providers/terraform-provider-azurerm/azurerm	53.147s

However when switching out the API version used in V11 of the SDK to 2015-11-01 - the tests appear to pass fine:

 $ acctests azurerm TestAccAzureRMTrafficManagerProfile_priority
=== RUN   TestAccAzureRMTrafficManagerProfile_priority
--- PASS: TestAccAzureRMTrafficManagerProfile_priority (60.44s)
PASS
ok  	github.com/terraform-providers/terraform-provider-azurerm/azurerm	60.460s

I took a look in the Portal too - and it appears the "Automation Script" export functionality is suggesting using a newer API version 2017-05-01:

I've also tried updating the SDK to use this version - and this also looks good:

$ acctests azurerm TestAccAzureRMTrafficManagerProfile_priority
=== RUN   TestAccAzureRMTrafficManagerProfile_priority
--- PASS: TestAccAzureRMTrafficManagerProfile_priority (61.73s)
PASS
ok  	github.com/terraform-providers/terraform-provider-azurerm/azurerm	61.759s

As such would it be possible to downgrade to a previous API version until the new version is fully rolled out?

Thanks!