Install and Configure Ambari Server with MySQL in CentOS/RHEL 7/6

Apache Ambari is an open source administration tool deploy to manage Hadoop cluster and responsible to monitor running applications and their status. In other words, Apache Ambari is an open source web-based management tool that manages, monitors and provisions the health of Hadoop clusters. It provides a highly interactive dashboard which allows the administrators to visualize the progress and status of every application running over the Hadoop cluster. Its flexible and scalable user-interface permits a scope of tools, for example, Yarn, Hive, etc, to be installed on the cluster and administers their performances in an easy to use.

Apache Ambari

See Also:

This article will help you to install and configure the Ambari Server in CentOS/RHEL.

Step 1: Prerequisites

Host File:
Before start installation of Apache Ambari add the system hostname in the host’s file.

127.0.0.1 srv.techoism.net srv
192.168.1.111 srv.techoism.net srv

Selinux:
Set secure Linux to permissive using selinux configuration file.

# vim /etc/sysconfig/selinx

Change the parameters.

SELINUX=permissive

Reboot the server or execute the mention command.

# setenforce Permissive

IPTables:
If on server Linux firewall is enabled, so you need to stop it and need to configure it.

For CentOS/RHEL 7
# systemctl stop firewalld
# systemctl disable firewalld
For CentOS/RHEL 6
# service iptables stop
# chkconfig iptables off

Step 2: Install and Start MySQL

MySQL is an open source relational database management system (RDBMS) based on Structured Query Language (SQL). Use-mention steps to install the MySQL.

# rpm -Uvh http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
# yum install mysql-server

Now start MySQL service and enable to start on boot using below commands.

For CentOS/RHEL 7
# systemctl start mysqld.service
# systemctl enable mysqld.service
For CentOS/RHEL 6
# service mysqld start
# chkconfig mysqld on

Set MySQL Root Password

# mysql_secure_installation

Step 3: Create MySQL Database and User

After installing MySQL database we need to create database and users. Use-mention steps you create the database and user.

# mysql -u root -p
mysql> create database ambari;
mysql> GRANT ALL ON ambari.* TO 'ambari'@'localhost' IDENTIFIED BY 'redhat';
mysql> FLUSH PRIVILEGES;
mysql> exit

Step 4: Install MySQL Java Connector

To connect MySQL with Apache Ambari we need to install the MySQL connector.

# yum install mysql-connector-java

Step 5: Add Ambari Repository

Apache Ambari repository provided by hortonworks. Run the following commands to download the repository.

# wget -nv http://public-repo-1.hortonworks.com/ambari/centos7/2.x/updates/2.5.2.0/ambari.repo -O /etc/yum.repos.d/ambari.repo

Step 6: Install Ambari Server

Install the Ambari bits. This also installs the default PostgreSQL Ambari database.

# yum install ambari-server

Step 7: Setup 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. Execute the mentioned command and follow the instruction.

# ambari-server setup

Step 7: Import Metadata to Ambari Server Database

After Ambari server setup we need to import the metadata to the Ambari server database. Use-mention command to import metadata.

# mysql -u root -p ambari < /var/lib/ambari-server/resources/Ambari-DDL-MySQL-CREATE.sql

Note: Sometime while importing metadata you can get mention error.

ERROR 1709 (HY000) at line 113: Index column size too large. The maximum column size is 767 bytes.

Use mention steps to resolve the error.

# mysql -u root -p
mysql> SELECT schema_name,default_character_set_name FROM information_schema.SCHEMATA;
mysql> ALTER DATABASE ambari CHARACTER SET utf8 COLLATE utf8_general_ci;

Step 8: Start Ambari Service

Now you are good to start the Ambari server. You can use mention command to start the Ambari service.

# ambari-server start

Step 9: Login the Ambari Server

You can access the Ambari Server using your
favorite browser.

http://hostname:8080
OR
http://IP-Address:8080

Default username and password is admin/admin.

Reference:
https://docs.hortonworks.com/HDPDocuments/Ambari-2.5.2.0/bk_ambari-installation/content/ch_Getting_Ready.html

Enjoy it!

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