Help Center > > User Guide> Managing an Existing Cluster> MRS Multi-User Permission Management> Creating a User

Creating a User

Updated at: Mar 25, 2021 GMT+08:00

Scenario

This section describes how to create users on Manager based on site requirements and specify their operation permissions to meet service requirements.

Up to 1000 users can be created on Manager.

If a new password policy needs to be used for a new user's password, follow instructions in Modifying a Password Policy to modify the password policy and then perform the following operations to create a user.

The operations described in this section apply only to clusters of MRS 2.1.0 or earlier.

For clusters of MRS 3.0.2 or later, see Creating a User.

Prerequisites

  • Administrators have learned service requirements and created roles and role groups required by service scenarios.
  • You have obtained a cluster with Kerberos authentication enabled or a common cluster with the EIP function enabled.

Procedure

  1. Access MRS Manager. For details, see Accessing MRS Manager (MRS 2.1.0 or Earlier).
  2. On MRS Manager, click System.
  3. In the Permission area, click Manage User.
  4. Above the user list, click Create User.
  5. Configure parameters as prompted and enter a username in Username.

    • A username that differs only in alphabetic case from an existing username is not allowed. For example, if User1 has been created, you cannot create user1.
    • When you use the user you created, enter the exactly correct username, which is case-sensitive.
    • Username is mandatory and contains 3 to 20 characters. Only digits, letters, and underscores (_) are allowed.
    • root, omm, and ommdba are reserved system user. Select another username.

  6. Set User Type to either Human-machine or Machine-machine.

    • Human-machine user: used for MRS Manager O&M scenarios and component client operation scenarios. If you select this user type, you need to enter a password and confirm the password in Password and Confirm Password accordingly.
    • Machine-machine users: used for MRS application development scenarios. If you select this user type, you do not need to enter a password, because the password is randomly generated.

  7. In User Group, click Select and Join User Group to select user groups and add users to them.

    • If roles have been added to user groups, the users can be granted with permissions of the roles.
    • If you want to grant new users with Hive permissions, add the users to the Hive group.
    • If a user needs to manage tenant resources, the user group must be assigned the Manager_tenant role and the role corresponding to the tenant.
    • Users created on Manager cannot be added to the user group synchronized using the IAM user synchronization function.

  8. In Primary Group, select a group as the primary group for users to create directories and files. The drop-down list contains all groups selected in User Group.
  9. In Assign Rights by Role, click Select and Add Role to add roles for users based on onsite service requirements.

    • When you create a user, if permissions of a user group that is granted to the user cannot meet service requirements, you can assign other created roles to the user. It takes 3 minutes to make role permissions granted to the new user take effect.
    • Adding a role when you create a user can specify the user rights.
    • A new user can access web UIs of HDFS, HBase, Yarn, Spark, and Hue even when roles are not assigned to the user.

  10. In Description, provide description based on onsite service requirements.

    Description is optional.

  11. Click OK.

    If a new user is used in the MRS cluster for the first time, for example, used for logging in to MRS Manager or using the cluster client, the password must be changed. For details, see Changing the Password of an Operation User.

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