Saturday, 10 August 2013

Centos 6/RHEL install and setup MariaDB enable remote connection

MariaDB is the robust, scalable, and reliable drop in replacement for MySQL with extra features including batched key access, block hash join, User-set memory limits, Null-rejecting conditions, In-to-exists, Semi-join, Materialisation and much more. It is used by a number of projects including Jelastic, MediaWiki, Moodle, Zend Framework, Drupal and others. Recently, the mighty federation backed Google are relinquishing their old MySQL kit for shiny new MariaDB relational relations.  It is available for Centos 6/RHEL (and others ) via the MariaDB repo.

So first go the MariaDB site and select a suitable version of the repo file for your setup.

Open up vi editor and copy/paste the details in to it.

Vi and Vim commands

$ sudo vi /etc/yum.repos.d/mariadb.repo

Run yum update, then install MariaDB

$ sudo yum -y update

$ sudo yum -y install MariaDB MariaDB-server

Start the server and set to start on boot.

$ sudo service mysql start

$ sudo chkconfig --levels 235 mysql on

Using the MySQL Secure installation

$ sudo /usr/bin/mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!

In order to log into MariaDB to secure it, we\'ll need the current
password for the root user.  If you\'ve just installed MariaDB, and you haven\'t set the root password yet, the password will be blank, so you should just press enter here.

Enter current password for root (enter for none):
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.

Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
 ... Success!
By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them.  This is intended only for testing, and to make the installation
go a bit smoother.  You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] y
 ... Success!

Normally, root should only be allowed to connect from \'localhost\'.  This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] y
 ... Success!

By default, MariaDB comes with a database named \'test\' that anyone can
access.  This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n] y
 - Dropping test database...
 ... Success!
 - Removing privileges on test database...
 ... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] y
 ... Success!

Cleaning up...

All done!  If you\'ve completed all of the above steps, your MariaDB installation should now be secure.

Thanks for using MariaDB!

Connecting to MariaDB

 mysql -u root -p

or

 mysql -h localhost -u root -p

Enable remote connection

$ sudo vi /etc/sysconfig/iptables

Enter the following lines

-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT

$ sudo service iptables restart