[role] Confusing service error caused by invalid `--scope` argument: The api-version '2018-01-01-preview' is invalid.

[wy193777]

Describe the bug
az ad sp create-for-rbac use wrong apiVersion.

To Reproduce

az ad sp create-for-rbac --name autotools-master-sp --role contributor --scope /subscriptions/<subscript id>/myRG

Output:

Role assignment creation failed.

role assignment response headers: {'Cache-Control': 'no-cache', 'Pragma': 'no-cache', 'Content-Type': 'application/json; charset=utf-8', 'Expires': '-1', 'x-ms-failure-cause': 'gateway', 'x-ms-request-id': '297b982c-922a-4940-91b4-fcd6478c87f3', 'x-ms-correlation-request-id': '297b982c-922a-4940-91b4-fcd6478c87f3', 'x-ms-routing-request-id': 'WESTUS:20180928T211950Z:297b982c-922a-4940-91b4-fcd6478c87f3', 'Strict-Transport-Security': 'max-age=31536000; includeSubDomains', 'X-Content-Type-Options': 'nosniff', 'Date': 'Fri, 28 Sep 2018 21:19:49 GMT', 'Content-Length': '407'}

The api-version '2018-01-01-preview' is invalid. The supported versions are '2018-08-01,2018-07-01,2018-06-01,2018-05-01,2018-02-01,2018-01-01,2017-12-01,2017-08-01,2017-06-01,2017-05-10,2017-05-01,2017-03-01,2016-09-01,2016-07-01,2016-06-01,2016-02-01,2015-11-01,2015-01-01,2014-04-01-preview,2014-04-01,2014-01-01,2013-03-01,2014-02-26,2014-04'.

Expected behavior
The service principal been created an role been assigned properly.

Environment summary
Azure Cloud Shell Bash

$ az --version
azure-cli (2.0.46)

acr (2.1.5)
acs (2.3.4)
advisor (0.6.0)
ams (0.2.3)
appservice (0.2.4)
backup (1.2.1)
batch (3.4.0)
batchai (0.4.3)
billing (0.2.0)
botservice (0.1.1)
cdn (0.1.1)
cloud (2.1.0)
cognitiveservices (0.2.3)
command-modules-nspkg (2.0.2)
configure (2.0.18)
consumption (0.4.0)
container (0.3.4)
core (2.0.46)
cosmosdb (0.2.1)
dla (0.2.3)
dls (0.1.3)
dms (0.1.1)
eventgrid (0.2.0)
eventhubs (0.2.4)
extension (0.2.1)
feedback (2.1.4)
find (0.2.12)
interactive (0.3.30)
iot (0.3.2)
iotcentral (0.1.2)
keyvault (2.2.3)
lab (0.1.1)
maps (0.3.2)
monitor (0.2.3)
network (2.2.5)
nspkg (3.0.3)
policyinsights (0.1.0)
profile (2.1.1)
rdbms (0.3.2)
redis (0.3.2)
relay (0.1.2)
reservations (0.4.0)
resource (2.1.4)
role (2.1.5)
search (0.1.1)
servicebus (0.2.3)
servicefabric (0.1.3)
signalr (1.0.0)
sql (2.1.4)
storage (2.2.2)
telemetry (1.0.0)
vm (2.2.3)

Python location '/opt/az/bin/python3'
Extensions directory '/home/myname/.azure/cliextensions'

Python (Linux) 3.6.5 (default, Sep 18 2018, 21:58:22)
[GCC 5.4.0 20160609]

Legal docs and information: aka.ms/AzureCliLegal

**Additional context**
Add any other context about the problem here.

[yugangw-msft]

Are you in azure stack, aka private cloud?

[wy193777]

Yugang Wang (@yugangw-msft) I don't think so. How can I verify this?

[yugangw-msft]

Run az account show --query "environmentName" and make sure the output is AzureCloud
If yes, please run az assignment list and let me know whether or not it fails for the same error

[wy193777]

It's AzureCloud.

az assignment list return error az: 'assignment' is not in the 'az' command group. See 'az --help'..

I guess you want me to run az role assignment list. All roles have been printed without any error after running this command.

[yugangw-msft]

correct, i meant az role assignment list
to isolate, can you just run az ad sp create-for-rbac w/o any argument? does that work?

[yugangw-msft]

i believe your scope might be wrong /subscriptions/<subscript id>/myRG, you missed a resourceGroups in the middle. Should be /subscriptions/<subscript id>/resourceGroups/myRG

[wy193777]

Yugang Wang (@yugangw-msft) you are right, I missed a resourceGroups in the middle. After added it, I created the service principal successfully.

Maybe you can change this ticket to something like misleading error when a wrong scope been specified.