How to load a AzureML model in an Azure Databricks compute? - azure-databricks

Question

I am trying to run a DatabricksStep. I have used ServicePrincipalAuthentication to authenticate the run:
appId = dbutils.secrets.get(<secret-scope-name>, <client-id>)
tenant = dbutils.secrets.get(<secret-scope-name>, <directory-id>)
clientSecret = dbutils.secrets.get(<secret-scope-name>, <client-secret>)
subscription_id = dbutils.secrets.get(<secret-scope-name>, <subscription-id>)
resource_group = <aml-rgp-name>
workspace_name = <aml-ws-name>
svc_pr = ServicePrincipalAuthentication(
tenant_id=tenant,
service_principal_id=appId,
service_principal_password=clientSecret)
ws = Workspace(
subscription_id=subscription_id,
resource_group=resource_group,
workspace_name=workspace_name,
auth=svc_pr
)
The authentication is successful since running the following block of code gives the desired output:
subscription_id = ws.subscription_id
resource_group = ws.resource_group
workspace_name = ws.name
workspace_region = ws.location
print(subscription_id, resource_group, workspace_name, workspace_region, sep='\n')
However, the following block of codes gives an error:
model_name=<registered-model-name>
model_path = Model.get_model_path(model_name=model_name, _workspace=ws)
loaded_model = joblib.load(model_path)
print('model loaded!')
This is giving an error:
UserErrorException:
Message:
Operation returned an invalid status code 'Forbidden'. The possible reason could be:
1. You are not authorized to access this resource, or directory listing denied.
2. you may not login your azure service, or use other subscription, you can check your
default account by running azure cli commend:
'az account list -o table'.
3. You have multiple objects/login session opened, please close all session and try again.
InnerException None
ErrorResponse
{
"error": {
"message": "\nOperation returned an invalid status code 'Forbidden'. The possible reason could be:\n1. You are not authorized to access this resource, or directory listing denied.\n2. you may not login your azure service, or use other subscription, you can check your\ndefault account by running azure cli commend:\n'az account list -o table'.\n3. You have multiple objects/login session opened, please close all session and try again.\n ",
"code": "UserError"
}
}
The error is Forbidden Error even though I have authenticated using ServicePrincipalAuthentication.
How to resolve this error to run inference using an AML registered model in ADB?

Answer 1

The Databricks workspace need to be present in the same subscription as your AML workspace.
This notebook demonstrates the use of DatabricksStep in Azure Machine Learning Pipeline.
Here is the Model class register.