Enabling ABFS File Browser in Hue with RAZ in DataHub

Hue offers you the capability to browse Azure Data Lake Storage (ADLS) Gen2 file system, upload files to ABFS, and create tables by importing files from ABFS containers. With RAZ, you can grant fine-grained access to per-user home directories and other directories within the ADLS containers using Ranger policies.

Hue administrators can create home directories for users by selecting the Create home directory option on the user's profile in Hue. If fine-grained authorization is enabled to access ADLS containers, then user home directories are automatically created when a user logs into Hue. You can disable automatic creation of user directories.

You must enable RAZ while registering your environment with CDP. See Introduction to RAZ on Azure environments” to get started with RAZ and complete the following steps:
  1. Register an Azure environment with the Enable Ranger authorization for ADLS Gen2 option enabled. You can use the CDP web interface or the CDP CLI to complete this task.
  2. Create a Data Hub cluster with Data Engineering or Data Mart cluster template.
  3. Create the following Ranger policies:
    • Hadoop SQL policy (all - database, table, column, all - url).
    • ABFS (cm_ADLS) policy (Default: User Home)

      You must specify the storage account name in the Storage Account field and the directory path of the container and its sub-directories in the Storage Account Container field of the cm_ADLS Ranger policy.

  4. Grant appropriate permissions to the users in CDP User Management Service (UMS). For example, EnvironmentUser.
  1. Log in to the CDP web interface as an Administrator.
  2. Go to Management Console > Environments, select your environment and go to the Data Lake tab.
  3. Click on the CM URL to open Cloudera Manager.
  4. Go to Clusters > Ranger RAZ service > Instances > RAZ server > Processes and note the value of the fs.azure.ext.raz.rest.host.url property from the core-site.xml file. You need this to specify the value of the api_url property in the Hue configuration.
  5. Go to Clusters > Hue service > Configuration > Hue Service Advanced Configuration Snippet (Safety Valve) for hue_safety_valve.ini and add the following lines:
    For example:
    • fs_defaultfs=abfs://storage-fs@mystorage.dfs.core.windows.net
    • webhdfs_url=https://mystorage.dfs.core.windows.net
    • remote_storage_home=abfs://storage-fs/user
    (RAZ-HA) You can specify a comma-separated list of URLs in the api_url property. For example:
  6. Click Save Changes.
  7. Restart the Hue service.
ABFS File Browser icon is added to the left assist pane on the Hue web interface. When you click on the ABFS File Browser icon, you are redirected to your user home directory.