A simplified definition of Docker

A simplified definition of docker

Dockerization is very popular jargon being shot around every software development teams these days. Even though software developers use that so commonly maybe not all stakeholders in software development projects understand what it really means. So we decided to write this short and brief article for you to give a simplified definition of dockers and its uses in software development projects. 

Whats a docker?

First thing first, it’s our good old operating systems. An installation file from macOS does not work on Windows. The server that web-based software development projects are deployed also have OS like Linux, Unix, Ubuntu and etc. For a web-based software development project to work across different environments (developers environment, staging and etc) dockers are being used to address this issue. Docker by creating containers of the application and frameworks and libraries separates the code from the infrastructure. 

So basically docker contains the application including backend, frontend, libraries and dependencies, the database. This grouping (packaging) is known as containers.

Basically, containers allow your developers to package up your application with every part it has such as environment, libraries, dependencies and etc and Docker uses these containers to ship out the application as one package. This is step one in the process, the packaging or containerization. 

Whats a Docker image?

Docker image is a helpful read-only template that includes all necessary instructions in order to provide a convenient way to package up an application and its preconfigured server environment details such as its OS. 

These images can be used to create containers and deploy the application on different environments such as test environment and production environment.