DAB Deployment to a (external) volume on UC

[breaka]

Hi everyone,

We are currently migrating to Unity Catalog and also our CD pipeline from DBX to Assets Bundle.

Reading the documentation beforehand, I was totally sure that Databricks would support deploying jobs directly to (external) volumes as it would make sense from a design perspective. But after testing, I found that this does not seem to be the case. Maybe I'm missing something...

What I've tried so far:

- workspace.root_dir: "/Volumes/<catalog>/<db>/code/${bundle.name}" => This creates a folder named "Volumes" in the workspace fs

- workspace.root_path: "s3://<s3-bucket>/volumes/code/${bundle.name}" => Error: unable to mkdir to write file s3:/<s3-bucket>/volumes/code/analytics_backend/state/deploy.lock: Path (s3:/<s3-bucket>/volumes/code/analytics_backend/state) doesn't start with '/'

Is there a way to directly deploy to an external volume via DAB? DBX for example supported deployments to abffs locations.

Thanks in advance!
David

[prith]

The path in the databricks.yml is with 2 slashes.. 

This is what I used 

root_path: s3://test-${var.sdlc_env}-us-east-1/dabs-artifacts/projects/.bundle/${bundle.name}/${bundle.target}

Yet still I got the error 

Error: Path (s3:/test-dev-us-east-1/dabs-artifacts/projects/.bundle/databricks-notebook-template-dabs/dev/files) doesn't start with '/'