7. [Optional] Install MySQL

If you are installing Hive and HCatalog services, you need a MySQL database instance to store metadata information. You can either use an existing MySQL instance or install a new instance of MySQL manually. To install a new instance:

  1. Connect to the host machine you plan to use for Hive and HCatalog.

  2. Install MySQL server. From a terminal window, type:

    For RHEL/CentOS:

    yum install mysql-server
  3. Start the instance.

    /etc/init.d/mysqld start

  4. Set the root user password.

    mysqladmin -u root -p‘{password}’ password $mysqlpassword
  5. Remove unnecessary information from log and STDOUT.

    mysqladmin -u root 2>&1 >/dev/null
  6. As root, use mysql (or other client tool) to create the “dbuser” and grant it adequate privileges. This user provides access to the Hive metastore.

    CREATE USER '$dbusername'@'localhost' IDENTIFIED BY '$dbuserpassword';
    GRANT ALL PRIVILEGES ON *.* TO 'dbuser'@'localhost';
    CREATE USER 'dbuser'@'%' IDENTIFIED BY 'dbuserpassword';
    GRANT ALL PRIVILEGES ON *.* TO 'dbuser'@'%';
  7. See if you can connect to the database as that user. You are prompted to enter the $dbuserpassword password above.

    mysql -u dbuser -p $dbuserpassword
  8. Install the MySQL connector JAR file.

    • For RHEL/CentOS/Oracle Linux:

      yum install mysql-connector-java*
    • For SLES:

      zypper install mysql-connector-java*
    • For Ubuntu:

      apt-get install mysql-connector-java*

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