Currently the Compute profile does not allow to customize dataproc images during instance creation. The Dataproc provisioner should be enhanced to add the support for custom images that can be read from GCS. More details on the feature https://cloud.google.com/dataproc/docs/guides/dataproc-images
Added the ability to select a Custom Dataproc Image. The complete URI for the custom image should be specified.
Added support for custom Dataproc image. Merged in develop, release/6.1, release/6.2. Handling of expired images pending.
Tested on staging on June 22nd, working as expected.