Default Users of Clusters with Kerberos Authentication Disabled

User Classification

The MRS cluster provides the following two types of users. Users are advised to periodically change the passwords. It is not recommended to use the default passwords.

User Type

Description

System users

User who runs OMS processes

Database users
  • User who manages OMS database and accesses data
  • User who runs the database of service components (Hive, Loader, and DBService)

System users

  • User Idap of the OS is required in the MRS cluster. Do not delete this account. Otherwise, the cluster may not work properly. Password management policies are maintained by the operation users.
  • Reset the passwords when you change the passwords of user ommdba and user omm for the first time. Change the passwords periodically after retrieving them.

Operation

Username

Initial Password

Description

System administrator of the MRS cluster

admin

Specified by the user during the cluster creation
  • Default user of MRS Manager to record cluster audit logs for versions earlier than MRS 1.8.0.
  • For clusters of 1.8.0 and later versions, the administrator password of MRS Manager is specified by users during cluster creation.

    This user also has the following permissions:

    • Common HDFS and ZooKeeper user permissions.
    • Permissions to submit and query MapReduce and Yarn tasks, manage Yarn queues, and access the Yarn web UI.
    • Permissions to submit, query, activate, deactivate, reassign, delete topologies, and operate all topologies of the Storm service.
    • Permissions to create, delete, authorize, reassign, consume, write, and query topics of the Kafka service.

MRS cluster node OS user

omm

Randomly generated by the system

Internal running user of the MRS cluster system. This user is an OS user generated on all node and does not require a unified password.

MRS cluster node OS user

root

Set by the user

NOTE:

Applicable to clusters of MRS 1.6.2 and later.

User for logging in to the node in the MRS cluster. This user is an OS user generated on all nodes.

User Group Information

Default User Group

Description

supergroup

Primary group of user admin, which has no additional permissions in the cluster with Kerberos authentication disabled.

check_sec_ldap

Used to test whether the active LDAP works properly. This user group is generated randomly in a test and automatically deleted after the test is complete. which is an internal system user group used only between components.

Manager_tenant

Tenant system user group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.

System_administrator

MRS cluster system administrator group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.

Manager_viewer

MRS Manager system viewer group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.

Manager_operator

MRS Manager system operator group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.

Manager_auditor

MRS Manager system auditor group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.

Manager_administrator

MRS Manager system administrator group, which is an internal system user group used only between components. It is used only in clusters with Kerberos authentication enabled.

compcommon

MRS cluster internal group, used to access public resources in the cluster. All system users and system running users are added to this user group by default.

default_1000

User group created for tenants, which is an internal system user group used only between components.

launcher-job

MRS internal group, which is used to submit jobs using V2 APIs.

OS User Group

Description

wheel

Primary group of MRS internal running user omm.

ficommon

MRS cluster common group that corresponds to compcommon for accessing public resource files stored in the OS of the cluster.

Database users

MRS cluster system database users include OMS database users and DBService database users.

Do not delete database users. Otherwise, the cluster or components may not work properly.

Operation

Default User

Initial Password

Description

OMS database

ommdba

dbChangeMe@123456

OMS database administrator who performs maintenance operations, such as creating, starting, and stopping.

omm

ChangeMe@123456

User for accessing OMS database data

DBService database

omm

dbserverAdmin@123

Administrator of the GaussDB database in the DBService component

hive

HiveUser@

User for Hive to connect to the DBService database

hue

HueUser@123

User for Hue to connect to the DBService database

sqoop

SqoopUser@

User for Loader to connect to the DBService database.
Parent topic: Security Management