OpenStack is intended to run like a charm, from private clouds to large and public clouds. So far, you have learned about the modular architecture of OpenStack and should be aware of how it is growing within several incubating projects, which make it an amazing cloud set: a real cloud. But unfortunately, concentrating on building and extending your infrastructure might jeopardize the stability of your cloud environment. The rule of thumb prioritizes a good strategy on how to keep your cloud under control; in other words, keeping a close eye on every piece of the OpenStack cloud. Running a large and complex infrastructure will need the best effort management that comes in tandem with a well-maintained monitoring strategy. As you will learn in this chapter, a new telemetry module in OpenStack called Ceilometer provides a dedicated monitoring solution for your instances...