PowerScale OneFS HDFS Configuration Guide

Enabling the WebHDFS REST API

OneFS supports access to HDFS data through WebHDFS REST API client applications.

WebHDFS is a RESTful programming interface based on HTTP operations such as GET, PUT, POST, and DELETE that is available for creating client applications. WebHDFS client applications allow you to access HDFS data and perform HDFS operations through HTTP and HTTPS.

• WebHDFS is supported by OneFS on a per-access zone basis and is enabled by default.
• WebHDFS supports simple authentication or Kerberos authentication. If the HDFS authentication method for an access zone is set to All, OneFS uses simple authentication for WebHDFS.
• To prevent unauthorized client access through simple authentication, disable WebHDFS in each access zone that should not support it.

You can specify whether access to HDFS data through WebHDFS client applications is supported in each access zone using either the OneFS web administration interface or the command-line interface.