As part of my work at Sojourn Labs (more about this at a later time), I’ve recently been working with creating a secure private cloud based on CoreOS, Docker (basically, a lightweight virtualization system), and some decade-old (or older) hardware. Different applications within the cloud need to communicate with each other securely. For example, our wiki needs to communicate with our database server. To link two Docker containers on the same machine together, one need only instruct Docker to create a link between the two. Things get more interesting when the communicating containers reside on different machines.
Musings of a happy scientist