Docker is a lightweight container for applications – think of a Docker as an app in a box, except that the box in this case isn’t an entire VM, but the bare necessities required to run a process. Consequently, you can run many Dockers in a VM. In essence, Docker replaces installation steps for a particular app. Rather than having to execute a series of steps to get, say, MongoDB running, you can simply fire up a Mongo Docker image.
Previous Topic
