Preparing an HDFS Application Development User

Prerequisites

Kerberos authentication has been enabled for the MRS cluster. Skip this step if Kerberos authentication is not enabled for the cluster.

Scenario

The development user is used to run the sample project. The user must have HDFS permissions to run the HDFS sample project.

Procedure

1. Log in to MRS Manager and choose System > Manage Role > Create Role.
   1. Enter a role name, for example, hdfsrole.
   2. Edit the role. In Permission, choose HDFS > File System > hdfs://hacluster/, select Read, Write, and Execute, and click OK.

2. Choose System > Manage User > Create User to create a user for the sample project.
3. Enter a username, for example, hdfsuser. Set User Type to Machine-machine, and select supergroup in User Group. Set Primary Group to supergroup, select hdfsrole in Assign Rights by Role, and click OK.
4. On MRS Manager, choose System > User Management. On the displayed page, select hdfsuser from the Username drop-down list. In the Operation column on the right, choose More > Download authentication credential. Save the downloaded package and decompress it to obtain the user.keytab and krb5.conf files for security authentication in the sample project, as shown in Figure 1.
   Figure 1 Downloading the authentication credential