[kossae]

Echoing the above, this is extremely important. Before jumping into any of the container orchestration tools you should familiarize yourself with terminology of Docker and it's concepts. I made the mistake of jumping in to Swarm (still unstable IMO) and Docker Compose before fully grasping how containers talked to each other, along with many other concepts I should have read up on first. (Un)fortunately, Docker is changing rapidly and the documentation doesn't always keep up. If something in the official docs doesn't make sense, Google around to gain better context.