Adding the PostgreSQL cartridge to your application

At the time of writing this book, OpenShift supports two versions of the PostgreSQL database. You can view all the supported PostgreSQL versions by running the following command:

$ rhc cartridges|grep postgresql
postgresql-8.4      PostgreSQL 8.4                          addon
postgresql-9.2      PostgreSQL 9.2                          addon

In this recipe, you will learn how to add the PostgreSQL 9.2 cartridge to your OpenShift application.

Getting ready

To complete 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 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.

How to do it…

To install the PostgreSQL 9.2 cartridge to the myapp application, open...