You can customize any of these users and groups using the Misc
tab
during the Customize Services
installation step.
Note | |
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Use the |
If you choose to customize names, Ambari checks to see if these custom accounts already exist. If they do not exist, Ambari creates them. The default accounts are always created during installation whether or not custom accounts are specified. These default accounts are not used and can be removed post-install.
Note | |
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All new service user accounts, and any existing user accounts used as service users, must have a UID >= 1000. |
Service Users
Service* | Component | Default User Account |
---|---|---|
Ambari Metrics | Metrics Collector, Metrics Monitor | ams |
Falcon | Falcon Server | falcon (Falcon is available with HDP 2.1 or 2.2 Stack.) |
Flume | Flume Agents | flume |
HBase | MasterServer RegionServer | hbase |
HDFS | NameNode SecondaryNameNode DataNode | hdfs |
Hive | Hive Metastore, HiveServer2 | hive |
Kafka | Kafka Broker | kafka |
Knox | Knox Gateway | knox |
MapReduce2 | HistoryServer | mapred |
Oozie | Oozie Server | oozie |
PostgreSQL | PostgreSQL (with Ambari Server) | postgres (Created as part of installing the default PostgreSQL database with Ambari Server. If you are not using the Ambari PostgreSQL database, this user is not needed.) |
Ranger | Ranger Admin, Ranger Usersync | ranger (Ranger is available with HDP 2.2 Stack) |
Spark | Spark History Server | spark (Spark is available with HDP 2.2 Stack) |
Sqoop | Sqoop | sqoop |
Storm | Masters (Nimbus, DRPC Server, Storm REST API, Server, Storm UI Server) Slaves (Supervisors, Logviewers) | storm (Storm is available with HDP 2.1 or 2.2 Stack.) |
Tez | Tez clients | tez (Tez is available with HDP 2.1 or 2.2 Stack.) |
WebHCat | WebHCat Server | hcat |
YARN | NodeManager ResourceManager | yarn |
ZooKeeper | ZooKeeper | zookeeper |
*For all components, the Smoke Test user performs smoke tests against cluster services as part of the install process. It also can perform these on-demand, from the Ambari Web UI. The default user account for the smoke test user is ambari-qa.
Service Groups
Service | Components | Default Group Account |
---|---|---|
All | All | hadoop |
Knox | Knox Gateway | knox |
Ranger | Ranger Admin, Ranger Usersync | ranger |
Spark | Spark History Server | spark |