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Almost ten years ago, the software would have to be typically deployed on “bare metal” or “virtual machines”. This made the entire process of installing, configuring, and relocating software burdensome. This also hampered the IT industry’s ability to respond swiftly to business changes. There was a requirement for something that would expedite the entire process of packing and deploying applications, environments, etc.

Then came into the picture, DotCloud, what today we know as “Docker”, used to be a platform-as-a-service(PaaS). Earlier, from what started as a solution to solve customer issues of DotCloud Inc. to today being widely adopted amongst the IT industry, Docker has come a long way. Container utilisation is increasing as cloud-native development methodologies become the standard model for developing and executing applications.

Here’s a video of Docker being demoed for the first time in Pycon 2013 [YouTube]

What is Docker?

Docker is an open-source platform for automating the deployment of applications as portable, self-sufficient containers that can run on the cloud or on-premises.

Docker Hub – the container image registry from Docker Inc. is a common repository (both public & private) where a person can find all the docker images published by various organisations or people around the world. Docker Hub allows free public repositories for images.