At the time of this writing, OpenShift supports two versions of the MySQL database. You can view the supported MySQL versions by running the following command:
$ rhc cartridges|grep mysql mysql-5.1 MySQL 5.1 addon mysql-5.5 MySQL 5.5 addon
To prepare for this recipe, you will need the rhc command-line client installed on your machine. Please refer to the Installing the OpenShift rhc command-line client recipe in Chapter 1, Getting Started with OpenShift, for more details. Also, we will use the application created in the Creating an OpenShift application using the rhc command-line client recipe in Chapter 3, Creating and Managing Applications.