In the recent times, when we hear about software containerization platforms, we first hear the name Docker for sure. It is the world’s leading software containerization platform. software containerization is a virtualization at server level where the kernel of an operating system allows the existence of multiple virtualized environments. Such instances are termed as software containers. The automation of application deployment into the software containers is achieved through docker. The application deployed through docker is light-weight, portable and self-sufficient and can run anywhere virtually.


Docker was introduced as an open source project by Dot Cloud in 2013. This project became extremely popular to such an extent that Dot Cloud altered its name to Docker Inc. The uniqueness of docker project is that it offers advanced tools which work together and are built on top of Linux Kernel features. The primary goal is to help developers and system administrators create, deploy and run an application with all the parts it needs, such as dependencies and get them running across any Linux machine regardless of any customized settings that machine might have that could differ from the machine used for writing and testing the code. Additional advantage of docker is that it is an open source software. It means that anyone can enhance the features of docker if they feel they can add any additional features to the existing software.

A Linux application of any language or framework can run inside a docker container. There are two ways to get applications into containers. They are manual builds and Docker file.

Manual builds:

A manual build starts by launching a container with a base OS image. Applications and dependencies can be installed using the package manager offer by the flavour of Linux which is chosen. When installation of application gets completed, it can be pushed to a registry.

Docker file:

Docker file is a script consisting of various instructions and arguments listed in it to automatically perform actions on a base image to create a new one.

Who can use Docker?

Docker is used extensively by both developers and system administrators making it an important part of devops. Developers can now write the code without worrying about the system on which the code runs. Because of docker’s small footprint and lower overhead, it gives flexibility and decreases the number of systems needed for operations staff.

Reason for Docker’s craze

The main reason for docker’s craze is its lightweight nature combined with the workflow.

It is fast, easy to use and developer centric tool. It is used extensively in devops projects.

Docker easily packs and ships the code. It makes the code as portable as possible and makes that portability user-friendly and simple.

Docker is operating system level virtualization. Unlike hypervisor virtualization where virtual machines run on physical hardware via hypervisors, containers instead run user space on operating system’s kernel. This makes them very lightweight and very fast.

Future of Docker

Big names in IT industry like Google, IBM, Red Hat are investing in docker project. It has been 3 years since the docker project has started and it is showing steady growth due to its extensive use in devops projects. In 2015, docker and some other companies announced that they are working on OS independent standard for software containers.


Docker is already changing the way how applications get deployed into the software containers and how they run in different environments. It is starting to reshape the way we think about software containerization. Get Docker training and Job prospects for professionals with expertise in docker have increased up to 1000 percent. Among the most sought-after IT skills, docker occupies second place and the salaries for docker professionals have risen by 28%. This ultimately determines the craze for docker in the IT industry. Anyone who works with code or servers can take the docker course for a brighter career

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