Microsoft Azure deployments can integrate with with the next generation of Azure Data Lake Store (ADLS Gen2).

• Microsof Azure Data Lake Store Gen2 (ADLS Gen2) combines the power of a high-performance file system with massive scale and economy. Azure Data Lake Storage Gen2 extends Azure Blob Storage capabilities and is optimized for analytics workloads. 
• For more information, see https://azure.microsoft.com/en-us/services/storage/data-lake-storage/.

Limitations of ADLS Gen2 Integration

• This version requires a specific CDH 6.1 bundle JAR. Details are described later.

Read-only access

If the base storage layer has been set to WASB, you can follow these instructions to set up read-only access to ADLS Gen2. 

Pre-requisites

General

• The 

  D s platform

   has already been installed and integrated with an Azure Databricks cluster. See Configure for Azure Databricks.

• For each combination of blob host and container, a separate Azure Key Vault Store entry must be created. For more information, please contact your Azure admin. 

• When running against ADLS Gen2, the product requires that you create a filesystem object in your ADLS Gen2 storage account.
• ABFSS must be set as the base storage layer for the 

  D s platform

   instance. See Set Base Storage Layer.

Create a registered application

Before you integrate with Azure ADLS Gen2, you must create the 

Azure properties

The following properties should already be specified in the Admin Settings page. Please verify that the following have been set:

• azure.applicationId
• azure.secret
• azure.directoryId

The above properties are needed for this configuration.

Registered application role

For more information, see Configure for Azure.

Key Vault Setup

An Azure Key Vault has already been set up and configured for use by the 

For more information on configuration for Azure key vault, see Configure for Azure.

Configure the 

D s platform

Specify CDH 6.1 bundle JARs

Please complete the following steps to review and modify if necessary the bundle JAR properties and dependency locations.

Steps:

1. D s config

2. Locate the following parameters and set them to the values listed below:

   Info
   NOTE: If you have integrated with Databricks Tables, do not overwrite the value for data-service.hiveJdbcJar with the following value, even if it's set to a different distribution JAR file.

   Code Block
   "hadoopBundleJar": "hadoop-deps/cdh-6.2/build/libs/cdh-6.2-bundle.jar", "spark-job-service.hiveDependenciesLocation": %(topOfTree)s/hadoop-deps/cdh-6.2/build/libs" "data-service.hiveJdbcJar": "hadoop-deps/cdh-6.2/build/libs/cdh-6.2-hive-jdbc.jar",

3. Save your changes and restart the platform.

Define base storage layer

Per earlier configuration:

• webapp.storageProtocol must be set to abfss.

  Info
  NOTE: Base storage layer must be configured when the platform is first installed and cannot be modified later.

  Info
  NOTE: To enable read-only access to ADLS Gen2, do not set the base storage layer to abfss.

• hdfs.protocolOverride is ignored.

See Set Base Storage Layer.

Review Java VFS Service

Use of ADLS Gen2 requires the Java VFS service in the 

For more information on configuring this service, see Configure Java VFS Service.

Configure file storage protocols and locations

The 

Steps:

1. D s config

2. Locate the following parameters and set their values according to the table below:
   
   

   Code Block
   "fileStorage.whitelist": ["abfss"], "fileStorage.defaultBaseUris": ["abfss://filesystem@storageaccount.dfs.core.windows.net/"],

   Parameter	Description
   filestorage.whitelist	A comma-separated list of protocols that are permitted to read and write with ADLS Gen2 storage. Info NOTE: The protocol identifier "abfss" must be included in this list.
   filestorage.defaultBaseUris	For each supported protocol, this param must contain a top-level path to the location where D s platform files can be stored. These files include uploads, samples, and temporary storage used during job execution. Info NOTE: A separate base URI is required for each supported protocol. You may only have one base URI for each protocol.

3. Save your changes and restart the platform.

Configure access mode

Authentication to ADLS Gen2 storage is supported for system mode only.

Steps:

Please verify the following steps to specify the ADLS access mode.

1. D s config

2. Verify that the following parameter to system:

   Code Block
   "azure.adlsgen2.mode": "system",

3. Save your changes.

Testing

Restart services. See Start and Stop the Platform.

After the configuration has been specified, an ADLS Gen2 connection appears in the Import Data page. Select it to begin navigating for data sources.

Try running a simple job from the

• Except as noted above, the ADLS Gen2 browser is identical to the ADLS one. See \ADLS Gen2 Browser.
• Except as noted above, the basic usage of ADLS Gen2 is identical to the ADLS (Gen1) version. See Using ADLS.