10. Customize Services

Customize Services presents you with a set of tabs that let you manage configuration settings for HDP components. The wizard sets reasonable defaults for each of the options here, but you can use this set of tabs to tweak those settings. You are strongly encouraged to do so, as your requirements may be slightly different. Pay particular attention to the directories suggested by the installer.

Hover your cursor over each of the properties to see a brief description of what it does. The number of tabs you see is based on the type of installation you have decided to do. A typical installation has at least ten groups of configuration properties and other related options, such as database settings for Hive/HCat and Oozie, admin name/password, and alert email for Nagios.

You must provide database passwords for the Hive and Oozie services, the Master Secret for Knox, and a valid email address to which system alerts will be sent. Select each service that displays a number highlighted red. Then, fill in the required field on the Service Config tab. Repeat this until the red flags disappear.

For example, Choose Hive. Expand the Hive Metastore section, if necessary. In Database Password, provide a password, then retype to confirm it, in the fields marked red and "This is required."


By default, Ambari will install a new MySQL instance for the Hive Metastore and install a Derby instance for Oozie. If you plan to use existing databases for MySQL, Oracle or PostgreSQL, modify these options before proceeding. Refer to Using Non-Default Databases for more information on using existing databases.

The service account users and groups are available under the Misc tab. These are the OS accounts the service components will run as. There is also an option to skip group modification. This tells Ambari to not modify group membership for the service users. If your environment does not allow groupmod or usermod , you need to select this “skip” option. See Customizing HDP Services for more information on service account users and groups.

After you complete Customizing Services, choose Next.

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