DefaultAzureCredential and User Assigned Identity in node Function App

• Package Name: @azure/identity
• Package Version: 1.2.3
• Operating system: Linux
• nodejs
  • version: 12

Describe the bug

This works:

const credentials = new identity.ManagedIdentityCredential(process.env.USER_ASSIGNED_ID)

This doesn’t:

const credentials = new identity.DefaultAzureCredential()

I have an Azure Function App to which a User Assigned Identity is being used. It works fine with ManagedIdentityCredential, where I can specify the Client Id of the user assigned identity. I can’t see a way to use DefaultAzureCredential instead.

To Reproduce Steps to reproduce the behavior:

1. Create a function app and a user assigned identity. Give the identity permissions to do something (e.g. Storage Blob Data Reader).
2. Assign the user assigned identity to the function app.
3. Try to create a DefaultAzureCredential.

Expected behavior I expect the DefaultAzureCredential to pick up the user assigned identity, or at least give me some way to assign the client id of the user assigned identity like ManagedIdentityCredential does.

[ashic]

@sadasant Thanks… looking at the code, I simply added an AZURE_CLIENT_ID app setting that equals the Client ID of the user assigned managed identity. It works as expected. Having it being passed through options can also come in handy.

[sadasant]

@ashic thank you for using our SDKs! Please let us know if you find any other issue.