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Connect Databricks App to Databricks App

This recipe demonstrates how to connect from a Databricks App to an API hosted as another Databricks App.

info

This is another type of Machine-to-Machine (M2M) connectivity. As each Databricks App is assigned a dedicated service principal upon creation, you should use this service principal's credentials when interacting with any Databricks service, including other Databricks Apps.

Code snippet​

In the Databricks Apps environment, environment variables for DATABRICKS_HOST, DATABRICKS_CLIENT_ID, and DATABRICKS_CLIENT_SECRET are are automatically set based on the app's workspace and assigned service principal. Therefore, you do not need to explicitly specify these values in the following code:

from databricks.sdk import WorkspaceClient
import requests

# DATABRICKS_HOST, DATABRICKS_CLIENT_ID, DATABRICKS_CLIENT_SECRET available in environemnt
wc = WorkspaceClient()
headers = wc.config.authenticate() # Contains Bearer Token

response = requests.get(
    "https://your-app-url/api/v1/healthcheck", headers=headers
)
print(response.json())

Permissions​

For Databricks App connectivity and authentication, the connecting App service principal needs the following permissions:

  • CAN USE on the target app

Dependencies​

requirements.txt
databricks-sdk
requests