Beyond One Server: Solving Docker Scaling with Swarm and Container Networks
This post covers three separate but deeply connected topics. We start by finishing what was started with Docker Hub, pushing all four bank service images to a remote registry so they survive beyond any single machine. From there, we identify a real architectural problem with single-host Docker deployments and introduce Docker Swarm as the solution. Finally, we close with Docker networking, explaining how containers communicate with each other both on the same host and across different hosts. By the end of this article, you will understand how to push and pull images from Docker Hub, how to set up a multi-node Docker Swarm cluster, how to create and scale services across that cluster, what self-healing means in practice, and how Docker networking works under the hood.
