Using Docker in Swarm Mode

The Docker Engine is a containerization platform for running Docker containers. Multiple Docker containers run in isolation on the same underlying operating system kernel, with each container having its own network and filesystem. Each Docker container is an encapsulation of the software and dependencies required for an application and does not incur the overhead of packaging a complete OS, which could be several GB. Docker applications are run from Docker images in Docker containers, with each Docker image being specific to a particular application or software.