Accessing the Hue Web UI

Scenario

After Hue is installed in an MRS cluster, users can use Hadoop-related components on the Hue web UI.

This section describes how to open the Hue web UI on the MRS cluster.

Impact on the System

Site trust must be added to the browser when you access Manager and Hue web UI for the first time. Otherwise, the Hue web UI cannot be accessed.

Prerequisites

When Kerberos authentication is enabled, you have been assigned the permission to access Hive by the MRS cluster administrator. For example, create a human-machine user hueuser, add the user to groups hive (primary group), hadoop, and supergroup, and assign the System_administrator role.

This user is used to log in to Manager.

Procedure

1. Log in to FusionInsight Manager. Choose Cluster > Services > Hue.
2. On the right of Hue WebUI, click the link to open the Hue web UI.

   Hue WebUI provides the following functions:

   • Click to execute query statements of Hive and SparkSQL as well as Notebook code. Make sure that Hive and Spark have been installed in the MRS cluster before this operation.
   • Click to submit workflow tasks, scheduled tasks, and bundle tasks.
   • Click to view, import, and export tasks on the Hue web UI, such as workflow tasks, scheduled tasks, and bundle tasks.
   • Click to manage metadata in Hive and SparkSQL. Make sure that Hive and Spark have been installed in the MRS cluster before this operation.
   • Click to view the directories and files in HDFS. Make sure that HDFS has been installed in the MRS cluster before this operation.
   • Click to view all jobs in the MRS cluster. Make sure that Yarn has been installed in the MRS cluster before this operation.
   • Use to create or query HBase tables. Make sure that the HBase component has been installed in the MRS cluster and the Thrift1Server instance has been added before this operation.
   • Use to import data that is in the CSV or TXT format.
   

   • When you log in to the Hue web UI as user hueuser for the first time, you need to change the password.
   • After obtaining the URL for accessing the Hue web UI, you can give the URL to other users who cannot access MRS Manager for accessing the Hue web UI.
   • If you perform operations on the Hue web UI only but not on Manager, you must enter the password of the current login user when you access Manager again.
   • The file you import cannot be larger than 100 MB and the file name cannot contain special characters, such as '\', '/', ':', '*', '/', '"', '<', '>', '|', '$', '&', '!', ';', '`', and '\n'.