In this chapter, you learned how to distribute services among cloud controllers by taking future deployment based on fundamental concepts about high availability and service clustering into consideration. You also learned how a cloud controller is composed and how it functions in an OpenStack environment. By breaking down the cookbooks we uploaded on our Chef server, you covered an example that showed how you could play with roles to define your own services for them to be reusable with other recipes. You should also have learned the importance of compute node requirement from a hardware perspective by refining the decision related to hypervisor selection and how to conduct the best storage outfit for your compute nodes.

Another important topic was highlighted, which investigates how to back up your OpenStack environment. This is not something to ignore; as your OpenStack installation grows, the size of disk usage per node may increase dramatically and can bring it down quite easily...