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  6. List of Default Users

List of Default Users

User Classification

The MRS cluster provides the following three types of users.

NOTE:

Users are required to periodically change their passwords. It is not recommended to use the default passwords.

User Type

Description

System user

A user used to run OMS system processes.

Internal system user

An internal user provided by the MRS cluster and used to implement communication between processes, save user group information, and associate user rights.

Database user

  • Used to manage the OMS database and access data.
  • Used to run the database of service components (Hive, Loader and DBService).

Temporary user

During cluster creation, MRS automatically creates a temporary management account (mrs) on the master node and randomly generates a password for VM OS initialization. After the cluster is created, the temporary account is immediately deleted.

System Users

NOTE:
  • User ldap of the OS is required in the MRS cluster. Do not delete the account. Otherwise, the cluster may not work properly. Password management policies are maintained by the users.
  • Reset the password when you change the passwords of user ommdba and user omm for the first time. Change the passwords regularly after you have retrieved them.

Type

Username

Initial Password

Description

MRS cluster system user

admin

MIG2oAMCAQGhAw@IBAaIDAgwCAQGkgZ8@wgZwwVKAHMAWgAw@IBAKFJMEgABD4gA

Default user of MRS Manager. The user is used to record the cluster audit logs.

MRS cluster node OS user

ommdba

Randomly generated by the system

User who creates the MRS cluster system database. This user is an OS user generated on the management nodes and does not require a unified password.

omm

Randomly generated by the system

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

linux

Randomly generated by the system

User used to log in to a node in the MRS cluster. This user is an OS user generated on all nodes.

User for running MRS cluster jobs

yarn_user

Randomly generated by the system

Internal user used to run the MRS cluster jobs. This user is generated on Core nodes.

Internal System Users

NOTE:

Do not delete the following internal system users. Otherwise, the cluster or services may not work properly.

Type

Default User

Initial Password

Description

Kerberos administrator

kadmin/admin

Admin@123

Account that is used to add, delete, modify, and query users on Kerberos.

OMS Kerberos administrator

kadmin/admin

Admin@123

Account that is used to add, delete, modify, and query users on OMS Kerberos.

LDAP administrator

cn=root,dc=hadoop,dc=com

LdapChangeMe@123

Account that is used to add, delete, modify, and query the user information on LDAP.

OMS LDAP administrator

cn=root,dc=hadoop,dc=com

LdapChangeMe@123

Account that is used to add, delete, modify, and query the user information on OMS LDAP.

LDAP user

cn=pg_search_dn,ou=Users,dc=hadoop,dc=com

pg_search_dn@123

User that is used to query information about users and user groups on LDAP.

OMS LDAP user

cn=pg_search_dn,ou=Users,dc=hadoop,dc=com

pg_search_dn@123

User that is used to query information about users and user groups on OMS LDAP.

LDAP administrator account

cn=krbkdc,ou=Users,dc=hadoop,dc=com

LdapChangeMe@123

Account that is used to query Kerberos component authentication account information.

cn=krbadmin,ou=Users,dc=hadoop,dc=com

LdapChangeMe@123

Account that is used to add, delete, or query Kerberos component authentication account information.

Component running user

oms/manager

Randomly generated by the system

The user that is used for communication between Master nodes and Core nodes.

check_ker_M

Randomly generated by the system

Kerberos internal functional user. This user cannot be deleted, and its password cannot be changed. This internal account cannot be used on the nodes where Kerberos service is not installed.

K/M

Randomly generated by the system

kadmin/changepw

Randomly generated by the system

kadmin/history

Randomly generated by the system

krbtgt/HADOOP.COM

Randomly generated by the system

User Group Information

Default User Group

Description

supergroup

Primary group of user admin. The primary group does not have additional permissions in the cluster where Kerberos authentication is 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. This is an internal system user group used only between components.

Manager_tenant_187

Tenant system user group. This is an internal system user group used only between components.

System_administrator_186

MRS cluster system administrator group. This is an internal system user group used only between components.

Manager_viewer_183

MRS Manager system viewer group. This is an internal system user group used only between components.

Manager_operator_182

MRS Manager system operator group. This is an internal system user group used only between components.

Manager_auditor_181

MRS Manager system auditor group. This is an internal system user group used only between components.

Manager_administrator_180

MRS Manager system administrator group. This is an internal system user group used only between components.

compcommon

MRS cluster internal group for accessing public cluster resources. All system users and system running users are added to this user group by default.

default_1000

This group is created for tenants. This is an internal system user group used only between components.

kafka

Kafka common user group. A user added to this user group can access a topic only when a user in the kafkaadmin group grants the read and write permission of the topic to the user.

kafkasuperuser

Users added to this user group have the read and write permission of all topics.

kafkaadmin

Kafka administrator group. Users added to this user group have the rights to create, delete, authorize, read, and write all topics.

storm

Users added to this user group can submit topologies and manage their own topologies.

stormadmin

Users added to this user group can have the storm administrator rights and can submit topologies and manage all topologies.

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 cluster resource files stored in the OS.

Database Users

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

NOTE:

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

Type

Default User

Initial Password

Description

OMS database

ommdba

dbChangeMe@123456

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

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