In the previous chapters, we looked at all the essential components required to build IaaS. In this chapter, we will look at how to install and configure two optional OpenStack services, namely Heat and Ceilometer.
Although these services are optional, in a production environment, it is definitely recommended that we have at least Ceilometer installed to meter different components, which can then be used to integrate with a billing system of your choice (for example, Velvica).
Heat, on the other hand, can help the users to use a template in order to orchestrate the entire stack.
In this chapter, we will cover the following topics: