The Docker ecosystem is made up of three main components – the Docker Engine, the Docker Hub, and the Docker Plugin. The Docker Engine is a portable, lightweight runtime and is available for Windows, Mac and Linux. The Docker Hub is a cloud service that lets you store, manage and deploy Docker containers. The Docker Hub has many helpful resources for building, testing and distributing Docker containers. The Docker Plugin is a hosted service for Docker images and containers. The Docker plugin is available for the CloudBees Jenkins Platform, CloudBees Jenkins Enterprise and CloudBees Jenkins Operations Center.