By default, Microsoft Azure deployments integrate with Azure Data Lake Store (ADLS). Optionally, you can configure your deployment to integrate with WASB.

• Microsof Azure Data Lake Store (ADLS) is a scalable repository for big data analytics. 
• ADLS is accessible from Microsoft HDI and Azure Databricks. 
• For more information, see https://docs.microsoft.com/en-us/azure/data-lake-store/data-lake-store-overview. 

Limitations of ADLS Integration

• In this release, the  supports integration with the default store only. Extra stores are not supported.

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. 

Pre-requisites

General

• The  has already been installed and integrated with an Azure HDI or Azure Databricks cluster.
• HDFS must be set as the base storage layer for the  instance. See Set Base Storage Layer.
• 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. 

Create a registered application

Before you integrate with Azure ADLS, you must create the  as a registered application. See Configure for Azure.

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. 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, see Configure for Azure.

Configure ADLS Authentication

Authentication to ADLS storage is supported for the following modes, which are described in the following section.

Steps:

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

1. 

2. Set the following parameter to the preferred mode (system or user):

   "azure.adl.mode": "<your_preferred_mode>",

   
   

3. Save your changes.

System mode access

When access to ADLS is requested, the platform uses the combination of Azure directory ID, Azure application ID, and Azure secret to complete access.

After defining the properties in the , system mode access requires no additional configuration.

User mode access

In user mode, a user ID hash is generated from the Key Vault key/secret and the user's AD login. This hash is used to generate the access token, which is stored in the Key Vault.

Set up for Azure AD SSO

Configure the 

Define default storage location and access key

In platform configuration, you must define the following properties:

"azure.adl.store": "<your_value_here>",

This property defines the ADLS storage to which all output data is delivered. Example:

adl://<YOUR_STORE_NAME>.azuredatalakestore.net

Per earlier configuration:

• webapp.storageProtocol must be set to hdfs.
• hdfs.protocolOverride must be set to adl.

Configure HDFS properties

In the , you must configure the following properties for effective communication with HDFS.

 "hdfs": {
  "username": "[hadoop.user]",
  "enabled": true,
  "webhdfs": {
   "httpfs": false,
   "maprCompatibilityMode": false,
   "ssl": {
    "enabled": true,
    "certificateValidationRequired": false,
    "certificatePath": "<YOUR_PATH_HERE>"
   },
   "host": "[ADLS].azuredatalakestore.net",
   "version": "/webhdfs/v1",
   "proxy": {
    "host": "proxy",
    "enabled": false,
    "port": 8080
   },
   "credentials": {
    "username": "[hadoop.user]",
    "password": ""
   },
   "port": 443
  },
  "protocolOverride": "adl",
  "highAvailability": {
   "serviceName": "[ADLS].azuredatalakestore.net",
   "namenodes": {}
  },
  "namenode": {
   "host": "[ADLS].azuredatalakestore.net",
   "port": 443
  }
 }

hdfs.username

hdfs.enabled

hdfs.protocolOverride

hdfs.highAvailability.serviceName

hdfs.highAvailability.namenodes

Enable

Steps:

1. 

2. Locate the following parameter and change its value to true:
   
   

   "azure.adl.enabled": true,

   
   

3. Configure use of the appropriate Hadoop bundle JAR:

   "hadoopBundleJar": "hadoop-deps/hdp-2.6/build/libs/hdp-2.6-bundle.jar",

   
   

4. Save your changes.

Testing

Restart services. See Start and Stop the Platform.

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

Try running a simple job from the . For more information, see Verify Operations.

• See ADLS Browser.
• See Using ADLS.