Practical DevOps

Manual installation

Before we can automate something, we need to understand the corresponding manual process.

Throughout this book, it is assumed that we are using a Red Hat based Linux distribution, such as Fedora or CentOS. Most Linux distributions are similar in principle, except that the command set used for package operations will perhaps differ a bit.

For the exercises, you can either use a physical server or a virtual machine installed in VirtualBox.

First we need the PostgreSQL relational database. Use this command:

dnf install postgresql

This will check whether there is a PostgreSQL server installed already. Otherwise, it will fetch the PostgreSQL packages from a remote yum repository and install it. So, on reflection, many of the potentially ...