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Docker Installation Architecture You can install Docker Engine on top of Linux, Mac and Windows operating systems. This figure shows a native Linux OS Docker deployment. This is a Linux system with several Docker applications installed. The Docker daemon manages the Docker containers: This example shows that Docker can be deployed as an application on older Windows or Mac systems via the Docker Toolbox . Toolbox uses docker-machine to provision a VirtualBox VM, which runs the boot2docker Linux distribution, and manages containers via the Docker daemon: This next example shows the Docker daemon  installed directly on a supported Mac or Windows OS, creating containers on top of a HyperKit VM (Mac) or Hyper-V VM (Windows): Docker provides an efficient mechanism to build , ship , and run any app on any OS on any platform , i.e. physical host, virtual host or in the cloud: Docker

Container and Virtual Machine Differences The differences between a Docker Container and a hypervisor-based Virtual Machine can be highlighted as follows: Footprint Each VM on the host runs its own (guest) operating system Containers share a single kernel, that of the hosts' operating system Advantage… to the container as sharing the kernel allows for more efficient operations, e.g. a reduction in the amount of maintenance needed, as only one OS needs to be patched and maintained in a container environment. Containers hold only the application and the dependencies it needs to run so disk footprint is tiny Processes Each VM hosts an operating system, with a full complement of native applications and processes A container runs a single application. Any other processes are children of the default application Advantage… to the container. A single-application system provides agility and a more efficien