I suspect that by the end of this chapter things were getting very predictable and there were no real surprises, this is by design. As you have experienced, Docker have provided a very powerful clustering solution which once deployed acts in a consistent and predictable way no matter what underlying platform you have launched your cluster on.
There is one important thing which we yet to touch on yet, persistent storage for our containers. This is important, especially in a cluster, as it allows our containers to not only move between hosts but also introduces ways in which we can do rolling updates of our applications.
In the next chapter, we are going to look at both Docker network & volume plugins.