The minimum requirements for completing the hands-on exercises in this chapter are a single CentOS 7 server with around 80 GB of disk space allocated, 2 CPU cores (virtual or physical), and 8 GB of memory. Although we will only look at a subset of the Katello features in this chapter, it should be noted that Foreman in particular (which is installed under Katello) is capable of acting as a DHCP server, DNS server, and PXE boot host and, as such, if configured incorrectly could cause issues if deployed on a production network.
For this reason, it is recommended that all exercises are performed in an isolated network suitable for testing. Where Ansible code is given, it will have been developed and tested in Ansible 2.8. For testing patching from Katello, you will need a CentOS 7 virtual machine.
All example code discussed in this book is available from GitHub...