Building a Docker image

At this point, you know the benefit of containerization and why it is becoming popular – you create an application, product, or service, bundle it using containerization, and give it to the QA team, customer, or DevOps team to run without any issues.

In this section, you’ll learn how to use Docker as a containerization platform. Let’s learn about it before creating a Docker image of a sample e-commerce app.

What is Docker?

Launched in 2013, Docker is a leading container platform and an open source project. Ten thousand developers tried it after its interactive tutorial was launched in August 2013. It was downloaded 2.75 million times by the time of its 1.0 release in June 2013. Many large corporations have signed a partnership agreement with Docker Inc., including Microsoft, Red Hat, HP, and OpenStack, as well as service providers such as AWS, IBM, and Google.

Docker makes use of Linux kernel features to ensure resource isolation...