Docker is an open source container platform, from Docker, Inc launched in 2013. Docker enables operating system level virtualization. Docker is available as free and enterprise version. Docker containers, unlike Virtual Machines, share the same host operating system. It has less overhead compared to VM’s. Docker created the industry guidelines for containers, making it more portable and secure. Docker is having the best isolation capability that is beneficial when more containers run on the same host system. Docker could be run on any system on-premises or CLOUD. Using docker we can create, start, stop, move, pause, unpause or delete a container.

A Docker container can connect to one or more networks, attach storage to it, and even create a new image depending on the current state of the container. Docker also helps in controlling how the containers are isolated from other containers or host MACHINE. Dockerfile in docker platform helps to achieve infrastructure as code thus enabling CONSISTENT and reliable computing environment. This reduces a lot of configuration and infrastructure related defects that would improve the quality of applications.  

Docker is supported on all the latest technologies like Google Cloud Platform and by Google Kubernetes Engine. Docker was primarily developed for Linux systems but now also supports Windows and Mac OS.