2. Set Up the Ambari Server

Before starting the Ambari Server, you must set up the Ambari Server. Setup configures Ambari to talk to the Ambari database, installs the JDK and allows you to customize the user account the Ambari Server daemon will run as. The ambari-server setup command manages the setup process. Run the following command on the Ambari server host to start the setup process. You may also append Setup Options to the command.

ambari-server setup

Respond to the setup prompt:

If you have not temporarily disabled SELinux, you may get a warning. Accept the default (y), and continue.
By default, Ambari Server runs under root. Accept the default (n) at the Customize user account for ambari-server daemon prompt, to proceed as root. If you want to create a different user to run the Ambari Server, or to assign a previously created user, select y at the Customize user account for ambari-server daemon prompt, then provide a user name. Refer to the Hortonworks Data Platform Apache Ambari Reference > Configuring Ambari for Non-Root, for more information about running the Ambari Server as non-root.
If you have not temporarily disabled iptables you may get a warning. Enter y to continue.

Select a JDK version to download. Enter 1 to download Oracle JDK 1.8. Alternatively, you can choose to enter a Custom JDK. If you choose Custom JDK, you must manually install the JDK on all hosts and specify the Java Home path.

	Note
JDK support depends entirely on your choice of HDP Stack versions. Please refer to the Hortonworks Data Platform Apache Ambari Reference to see which JDK versions are supported by the HDP Stack version you intend to install. By default, Ambari Server setup downloads and installs Oracle JDK 1.8 and the accompanying Java Cryptography Extension (JCE) Policy Files. If you plan to use a different version of the JDK, see Setup Options for more information.

Note

JDK support depends entirely on your choice of HDP Stack versions. Please refer to the Hortonworks Data Platform Apache Ambari Reference to see which JDK versions are supported by the HDP Stack version you intend to install. By default, Ambari Server setup downloads and installs Oracle JDK 1.8 and the accompanying Java Cryptography Extension (JCE) Policy Files. If you plan to use a different version of the JDK, see Setup Options for more information.

Accept the Oracle JDK license when prompted. You must accept this license to download the necessary JDK from Oracle. The JDK is installed during the deploy phase.

Select n at Enter advanced database configuration to use the default, embedded PostgreSQL database for Ambari. The default PostgreSQL database name is ambari. The default user name and password are ambari/bigdata. Otherwise, to use an existing PostgreSQL, MySQL/MariaDB or Oracle database with Ambari, select y.

If you are using an existing PostgreSQL, MySQL/MariaDB, or Oracle database instance, use one of the following prompts:

	Important
	You must prepare a non-default database instance, using the steps detailed in Using Non-Default Databases-Ambari, before running setup and entering advanced database configuration.

	Important
	Using the Microsoft SQL Server or SQL Anywhere database options are not supported.

To use an existing Oracle instance, and select your own database name, user name, and password for that database, enter 2.
Select the database you want to use and provide any information requested at the prompts, including host name, port, Service Name or SID, user name, and password.
To use an existing MySQL/MariaDB database, and select your own database name, user name, and password for that database, enter 3.
Select the database you want to use and provide any information requested at the prompts, including host name, port, database name, user name, and password.
To use an existing PostgreSQL database, and select your own database name, user name, and password for that database, enter 4.
Select the database you want to use and provide any information requested at the prompts, including host name, port, database name, user name, and password.

At Proceed with configuring remote database connection properties [y/n] choose y.
Setup completes.
Note
If your host accesses the Internet through a proxy server, you must configure Ambari Server to use this proxy server. See How to Set Up an Internet Proxy Server for Ambari for more information.

	Note
	If your host accesses the Internet through a proxy server, you must configure Ambari Server to use this proxy server. See How to Set Up an Internet Proxy Server for Ambari for more information.

​2. Set Up the Ambari Server

2. Set Up the Ambari Server