In this chapter, we showed you how we deployed two huge Swarm clusters over Digital Ocean by using belt. These stories gave you much to learn from. We summarized the lessons and outlined some tips for running huge production swarms. On the go, we also introduced some Swarm features, such as services and security, and we discussed managers' topologies. In the next chapter, we'll discuss in detail how to administer Swarm. Topics included will be deploying workers with belt, scripts and Ansible, managing nodes, monitoring, and graphical interfaces.