As we have seen in previous chapters, Docker is a fantastic tool that follows the most modern architectural principles used for running applications packed as containers. In this case, Docker Swarm runs only Docker containers, ignoring other technologies that, at the moment, are not suitable for production, such as Rkt. Even Docker is quite new to the scene up to a point that some companies hesitate in deploying it in their production systems, as there is not so much expertise in the market as well as many doubts about security or how Docker works in general.

Docker Swarm is the clustered version of Docker, and it solves the problem described in the previous section in a very simple manner: pretty much all the docker commands that you learned in the Docker chapter works in Docker Swarm so that we can federate our hardware without actually taking care of the hardware itself. Just add nodes to the pool of resources and Swarm will take care of them, leveraging the way we build our...