What is docker?

Docker is an open source project, born in early 2013, and initially an amateur project within dotcloud. It is based on the go language implemented by Google.

Docker based on Linux container LxC, realizes the lightweight virtualization solution of operating system. Docker further encapsulates the LxC, which makes the operation easier and convenient for users to care about the container management. The container in which users operate docker is as simple as operating a fast, lightweight virtual machine.