What is Docker?

As a tool, Docker uses the idea of the isolated resources to make a set of tools for packaging the applications in the association of installed dependencies and runs wherever it wants. It is Docker, which provides less isolation, whereas the containers are considered lightweight. Therefore, we can run many containers on a host.  

Usage of Docker :

Docker compares between containers and virtual machines. It contains two concepts and seems similar even with virtual machine containers in the form of an idea, an image, and a container. Docker images explain in the mode of special text files that are known as Dockerfile and it requires to describe all necessary steps separately within the Dockerfile.  

More advantages:

In the case of a real-life situation when the applications require external dependencies like database, message queues or other external services that the applications communicate with, under such scenario we look for a simple way to bring these dependencies in our development environment. 

Finally, it is Docker which makes possible packaging of applications with its essential dependencies inside. Thus, the deployment process gets simplified and we grab full reproducible environments. If we have Docker Compose, and a container deployment for the live environments, then it becomes a very powerful and reproducible setup for our applications. It could be said a smooth transition between the development environment and the live deployment.

Docker setup recoups the efforts rapidly and it provides further improvement according to the project maturity, requirements and size of the team.

Read on to understand how to containerize an app, use container orchestration tools for deployments, and install Docker.