Demystifying Docker for Data Scientists – A Docker Tutorial for Your Deep Learning Projects

The docker run command first creates a writeable container layer over the specified image, and then starts it using the specified command. In this sense containers can be called instances of an image. If the image is not found on the host machine, it will download it from Docker hub before executing the command. We get a new container every time docker run command is executed allowing us to have multiple instances of the same image. Normally if we run a container without options it will start and stop immediately.