User management allows you to manage the accounts required to create services on specified clusters. E-MapReduce currently supports the creation of two types of accounts: Knox and Kerberos. This topic explains how to manage Knox accounts.

Create a RAM account

  1. Log on to the Alibaba Cloud E-MapReduce console and go to the Cluster Management page.
  2. Click Manage on the right side of the target cluster ID.
  3. In the navigation panel on the left, click User Management.
  4. In the upper-right corner of the page, click Create RAM User.

Add a Knox account

  1. In the User Management page, select the account you want to add to a cluster, and then click Set Knox Account Password in the Actions column.
  2. In the Add Knox User dialog box, enter a password to use for logon and click OK.
  3. Refresh the User Management page. When Synchronized is displayed in the Knox Account column, you have successfully added the Knox account.

    You can then sign in to Knox using the User Name and the password set in the preceding step.

    For more information about how to use Knox, see Knox.

Delete a Knox account

  1. In the User Management panel, select the account you want to delete from a cluster, and then click Delete Knox Account in the Actions column.
  2. Refresh the User Management page. When Unsynchronized is displayed in the Knox Account column, you have successfully deleted the Knox account.

Kerberos account

When this Kerberos mode is enabled, the software on the cluster runs in Kerberos security mode. For more information, please refer to Introduction to Kerberos.

FAQs

  • Different clusters cannot share the same Knox account. For example, Knox account A that you added to cluster-1 cannot be used in cluster-2. If you want to use Knox account A in cluster-2, you must re-add account A to cluster-2.

  • If the message An error occurred while synchronizing the status is displayed when you add a Knox account, click Retry to add it again.

  • If you try to add an account multiple times but it fails each time, click Clusters and Services on the left side of the page to check if ApacheDS is stopped. If it is, start ApacheDS and go back to User Management to try again.